Commit | Line | Data |
---|---|---|
1da177e4 LT |
1 | /* |
2 | * mxser.c -- MOXA Smartio/Industio family multiport serial driver. | |
3 | * | |
80ff8a80 JS |
4 | * Copyright (C) 1999-2006 Moxa Technologies (support@moxa.com). |
5 | * Copyright (C) 2006-2008 Jiri Slaby <jirislaby@gmail.com> | |
1da177e4 | 6 | * |
1c45607a JS |
7 | * This code is loosely based on the 1.8 moxa driver which is based on |
8 | * Linux serial driver, written by Linus Torvalds, Theodore T'so and | |
9 | * others. | |
1da177e4 LT |
10 | * |
11 | * This program is free software; you can redistribute it and/or modify | |
12 | * it under the terms of the GNU General Public License as published by | |
13 | * the Free Software Foundation; either version 2 of the License, or | |
8ea2c2ec | 14 | * (at your option) any later version. |
1da177e4 | 15 | * |
1da177e4 LT |
16 | * Fed through a cleanup, indent and remove of non 2.6 code by Alan Cox |
17 | * <alan@redhat.com>. The original 1.8 code is available on www.moxa.com. | |
18 | * - Fixed x86_64 cleanness | |
19 | * - Fixed sleep with spinlock held in mxser_send_break | |
20 | */ | |
21 | ||
1da177e4 | 22 | #include <linux/module.h> |
1da177e4 LT |
23 | #include <linux/errno.h> |
24 | #include <linux/signal.h> | |
25 | #include <linux/sched.h> | |
26 | #include <linux/timer.h> | |
27 | #include <linux/interrupt.h> | |
28 | #include <linux/tty.h> | |
29 | #include <linux/tty_flip.h> | |
30 | #include <linux/serial.h> | |
31 | #include <linux/serial_reg.h> | |
32 | #include <linux/major.h> | |
33 | #include <linux/string.h> | |
34 | #include <linux/fcntl.h> | |
35 | #include <linux/ptrace.h> | |
36 | #include <linux/gfp.h> | |
37 | #include <linux/ioport.h> | |
38 | #include <linux/mm.h> | |
1da177e4 LT |
39 | #include <linux/delay.h> |
40 | #include <linux/pci.h> | |
1977f032 | 41 | #include <linux/bitops.h> |
1da177e4 LT |
42 | |
43 | #include <asm/system.h> | |
44 | #include <asm/io.h> | |
45 | #include <asm/irq.h> | |
1da177e4 LT |
46 | #include <asm/uaccess.h> |
47 | ||
48 | #include "mxser.h" | |
49 | ||
80ff8a80 | 50 | #define MXSER_VERSION "2.0.3" /* 1.11 */ |
1da177e4 LT |
51 | #define MXSERMAJOR 174 |
52 | #define MXSERCUMAJOR 175 | |
53 | ||
1da177e4 | 54 | #define MXSER_BOARDS 4 /* Max. boards */ |
1da177e4 | 55 | #define MXSER_PORTS_PER_BOARD 8 /* Max. ports per board */ |
1c45607a JS |
56 | #define MXSER_PORTS (MXSER_BOARDS * MXSER_PORTS_PER_BOARD) |
57 | #define MXSER_ISR_PASS_LIMIT 100 | |
1da177e4 LT |
58 | |
59 | #define MXSER_ERR_IOADDR -1 | |
60 | #define MXSER_ERR_IRQ -2 | |
61 | #define MXSER_ERR_IRQ_CONFLIT -3 | |
62 | #define MXSER_ERR_VECTOR -4 | |
63 | ||
1c45607a JS |
64 | /*CheckIsMoxaMust return value*/ |
65 | #define MOXA_OTHER_UART 0x00 | |
66 | #define MOXA_MUST_MU150_HWID 0x01 | |
67 | #define MOXA_MUST_MU860_HWID 0x02 | |
68 | ||
1da177e4 LT |
69 | #define WAKEUP_CHARS 256 |
70 | ||
71 | #define UART_MCR_AFE 0x20 | |
72 | #define UART_LSR_SPECIAL 0x1E | |
73 | ||
1c45607a JS |
74 | #define PCI_DEVICE_ID_CB108 0x1080 |
75 | #define PCI_DEVICE_ID_CB114 0x1142 | |
80ff8a80 | 76 | #define PCI_DEVICE_ID_CP114UL 0x1143 |
1c45607a JS |
77 | #define PCI_DEVICE_ID_CB134I 0x1341 |
78 | #define PCI_DEVICE_ID_CP138U 0x1380 | |
79 | #define PCI_DEVICE_ID_POS104UL 0x1044 | |
1da177e4 | 80 | |
1da177e4 LT |
81 | |
82 | #define C168_ASIC_ID 1 | |
83 | #define C104_ASIC_ID 2 | |
84 | #define C102_ASIC_ID 0xB | |
85 | #define CI132_ASIC_ID 4 | |
86 | #define CI134_ASIC_ID 3 | |
87 | #define CI104J_ASIC_ID 5 | |
88 | ||
1c45607a JS |
89 | #define MXSER_HIGHBAUD 1 |
90 | #define MXSER_HAS2 2 | |
1da177e4 | 91 | |
8ea2c2ec | 92 | /* This is only for PCI */ |
1c45607a | 93 | static const struct { |
1da177e4 LT |
94 | int type; |
95 | int tx_fifo; | |
96 | int rx_fifo; | |
97 | int xmit_fifo_size; | |
98 | int rx_high_water; | |
99 | int rx_trigger; | |
100 | int rx_low_water; | |
101 | long max_baud; | |
1c45607a | 102 | } Gpci_uart_info[] = { |
1da177e4 LT |
103 | {MOXA_OTHER_UART, 16, 16, 16, 14, 14, 1, 921600L}, |
104 | {MOXA_MUST_MU150_HWID, 64, 64, 64, 48, 48, 16, 230400L}, | |
105 | {MOXA_MUST_MU860_HWID, 128, 128, 128, 96, 96, 32, 921600L} | |
106 | }; | |
1c45607a | 107 | #define UART_INFO_NUM ARRAY_SIZE(Gpci_uart_info) |
1da177e4 | 108 | |
1c45607a JS |
109 | struct mxser_cardinfo { |
110 | char *name; | |
111 | unsigned int nports; | |
112 | unsigned int flags; | |
113 | }; | |
1da177e4 | 114 | |
1c45607a JS |
115 | static const struct mxser_cardinfo mxser_cards[] = { |
116 | /* 0*/ { "C168 series", 8, }, | |
117 | { "C104 series", 4, }, | |
118 | { "CI-104J series", 4, }, | |
119 | { "C168H/PCI series", 8, }, | |
120 | { "C104H/PCI series", 4, }, | |
121 | /* 5*/ { "C102 series", 4, MXSER_HAS2 }, /* C102-ISA */ | |
122 | { "CI-132 series", 4, MXSER_HAS2 }, | |
123 | { "CI-134 series", 4, }, | |
124 | { "CP-132 series", 2, }, | |
125 | { "CP-114 series", 4, }, | |
126 | /*10*/ { "CT-114 series", 4, }, | |
127 | { "CP-102 series", 2, MXSER_HIGHBAUD }, | |
128 | { "CP-104U series", 4, }, | |
129 | { "CP-168U series", 8, }, | |
130 | { "CP-132U series", 2, }, | |
131 | /*15*/ { "CP-134U series", 4, }, | |
132 | { "CP-104JU series", 4, }, | |
133 | { "Moxa UC7000 Serial", 8, }, /* RC7000 */ | |
134 | { "CP-118U series", 8, }, | |
135 | { "CP-102UL series", 2, }, | |
136 | /*20*/ { "CP-102U series", 2, }, | |
137 | { "CP-118EL series", 8, }, | |
138 | { "CP-168EL series", 8, }, | |
139 | { "CP-104EL series", 4, }, | |
140 | { "CB-108 series", 8, }, | |
141 | /*25*/ { "CB-114 series", 4, }, | |
142 | { "CB-134I series", 4, }, | |
143 | { "CP-138U series", 8, }, | |
80ff8a80 JS |
144 | { "POS-104UL series", 4, }, |
145 | { "CP-114UL series", 4, } | |
1c45607a | 146 | }; |
1da177e4 | 147 | |
1c45607a JS |
148 | /* driver_data correspond to the lines in the structure above |
149 | see also ISA probe function before you change something */ | |
1da177e4 | 150 | static struct pci_device_id mxser_pcibrds[] = { |
1c45607a JS |
151 | { PCI_VDEVICE(MOXA, PCI_DEVICE_ID_MOXA_C168), .driver_data = 3 }, |
152 | { PCI_VDEVICE(MOXA, PCI_DEVICE_ID_MOXA_C104), .driver_data = 4 }, | |
153 | { PCI_VDEVICE(MOXA, PCI_DEVICE_ID_MOXA_CP132), .driver_data = 8 }, | |
154 | { PCI_VDEVICE(MOXA, PCI_DEVICE_ID_MOXA_CP114), .driver_data = 9 }, | |
155 | { PCI_VDEVICE(MOXA, PCI_DEVICE_ID_MOXA_CT114), .driver_data = 10 }, | |
156 | { PCI_VDEVICE(MOXA, PCI_DEVICE_ID_MOXA_CP102), .driver_data = 11 }, | |
157 | { PCI_VDEVICE(MOXA, PCI_DEVICE_ID_MOXA_CP104U), .driver_data = 12 }, | |
158 | { PCI_VDEVICE(MOXA, PCI_DEVICE_ID_MOXA_CP168U), .driver_data = 13 }, | |
159 | { PCI_VDEVICE(MOXA, PCI_DEVICE_ID_MOXA_CP132U), .driver_data = 14 }, | |
160 | { PCI_VDEVICE(MOXA, PCI_DEVICE_ID_MOXA_CP134U), .driver_data = 15 }, | |
161 | { PCI_VDEVICE(MOXA, PCI_DEVICE_ID_MOXA_CP104JU),.driver_data = 16 }, | |
162 | { PCI_VDEVICE(MOXA, PCI_DEVICE_ID_MOXA_RC7000), .driver_data = 17 }, | |
163 | { PCI_VDEVICE(MOXA, PCI_DEVICE_ID_MOXA_CP118U), .driver_data = 18 }, | |
164 | { PCI_VDEVICE(MOXA, PCI_DEVICE_ID_MOXA_CP102UL),.driver_data = 19 }, | |
165 | { PCI_VDEVICE(MOXA, PCI_DEVICE_ID_MOXA_CP102U), .driver_data = 20 }, | |
166 | { PCI_VDEVICE(MOXA, PCI_DEVICE_ID_MOXA_CP118EL),.driver_data = 21 }, | |
167 | { PCI_VDEVICE(MOXA, PCI_DEVICE_ID_MOXA_CP168EL),.driver_data = 22 }, | |
168 | { PCI_VDEVICE(MOXA, PCI_DEVICE_ID_MOXA_CP104EL),.driver_data = 23 }, | |
169 | { PCI_VDEVICE(MOXA, PCI_DEVICE_ID_CB108), .driver_data = 24 }, | |
170 | { PCI_VDEVICE(MOXA, PCI_DEVICE_ID_CB114), .driver_data = 25 }, | |
171 | { PCI_VDEVICE(MOXA, PCI_DEVICE_ID_CB134I), .driver_data = 26 }, | |
172 | { PCI_VDEVICE(MOXA, PCI_DEVICE_ID_CP138U), .driver_data = 27 }, | |
173 | { PCI_VDEVICE(MOXA, PCI_DEVICE_ID_POS104UL), .driver_data = 28 }, | |
80ff8a80 | 174 | { PCI_VDEVICE(MOXA, PCI_DEVICE_ID_CP114UL), .driver_data = 29 }, |
1c45607a | 175 | { } |
1da177e4 | 176 | }; |
1da177e4 LT |
177 | MODULE_DEVICE_TABLE(pci, mxser_pcibrds); |
178 | ||
1da177e4 LT |
179 | static int ioaddr[MXSER_BOARDS] = { 0, 0, 0, 0 }; |
180 | static int ttymajor = MXSERMAJOR; | |
1da177e4 LT |
181 | |
182 | /* Variables for insmod */ | |
183 | ||
184 | MODULE_AUTHOR("Casper Yang"); | |
185 | MODULE_DESCRIPTION("MOXA Smartio/Industio Family Multiport Board Device Driver"); | |
8d3b33f6 RR |
186 | module_param_array(ioaddr, int, NULL, 0); |
187 | module_param(ttymajor, int, 0); | |
1da177e4 LT |
188 | MODULE_LICENSE("GPL"); |
189 | ||
190 | struct mxser_log { | |
191 | int tick; | |
192 | unsigned long rxcnt[MXSER_PORTS]; | |
193 | unsigned long txcnt[MXSER_PORTS]; | |
194 | }; | |
195 | ||
196 | ||
197 | struct mxser_mon { | |
198 | unsigned long rxcnt; | |
199 | unsigned long txcnt; | |
200 | unsigned long up_rxcnt; | |
201 | unsigned long up_txcnt; | |
202 | int modem_status; | |
203 | unsigned char hold_reason; | |
204 | }; | |
205 | ||
206 | struct mxser_mon_ext { | |
207 | unsigned long rx_cnt[32]; | |
208 | unsigned long tx_cnt[32]; | |
209 | unsigned long up_rxcnt[32]; | |
210 | unsigned long up_txcnt[32]; | |
211 | int modem_status[32]; | |
212 | ||
213 | long baudrate[32]; | |
214 | int databits[32]; | |
215 | int stopbits[32]; | |
216 | int parity[32]; | |
217 | int flowctrl[32]; | |
218 | int fifo[32]; | |
219 | int iftype[32]; | |
220 | }; | |
8ea2c2ec | 221 | |
1c45607a JS |
222 | struct mxser_board; |
223 | ||
224 | struct mxser_port { | |
225 | struct mxser_board *board; | |
226 | struct tty_struct *tty; | |
227 | ||
228 | unsigned long ioaddr; | |
229 | unsigned long opmode_ioaddr; | |
230 | int max_baud; | |
1da177e4 | 231 | |
1da177e4 LT |
232 | int rx_high_water; |
233 | int rx_trigger; /* Rx fifo trigger level */ | |
234 | int rx_low_water; | |
235 | int baud_base; /* max. speed */ | |
1da177e4 | 236 | int type; /* UART type */ |
1c45607a JS |
237 | int flags; /* defined in tty.h */ |
238 | ||
1da177e4 | 239 | int x_char; /* xon/xoff character */ |
1da177e4 LT |
240 | int IER; /* Interrupt Enable Register */ |
241 | int MCR; /* Modem control register */ | |
1c45607a JS |
242 | |
243 | unsigned char stop_rx; | |
244 | unsigned char ldisc_stop_rx; | |
245 | ||
246 | int custom_divisor; | |
247 | int close_delay; | |
248 | unsigned short closing_wait; | |
249 | unsigned char err_shadow; | |
1da177e4 | 250 | unsigned long event; |
1c45607a | 251 | |
1da177e4 LT |
252 | int count; /* # of fd on device */ |
253 | int blocked_open; /* # of blocked opens */ | |
1c45607a JS |
254 | struct async_icount icount; /* kernel counters for 4 input interrupts */ |
255 | int timeout; | |
256 | ||
257 | int read_status_mask; | |
258 | int ignore_status_mask; | |
259 | int xmit_fifo_size; | |
1da177e4 LT |
260 | unsigned char *xmit_buf; |
261 | int xmit_head; | |
262 | int xmit_tail; | |
263 | int xmit_cnt; | |
1c45607a | 264 | |
606d099c | 265 | struct ktermios normal_termios; |
1c45607a | 266 | |
1da177e4 | 267 | struct mxser_mon mon_data; |
1c45607a | 268 | |
1da177e4 | 269 | spinlock_t slock; |
1c45607a JS |
270 | wait_queue_head_t open_wait; |
271 | wait_queue_head_t delta_msr_wait; | |
272 | }; | |
273 | ||
274 | struct mxser_board { | |
275 | unsigned int idx; | |
276 | int irq; | |
277 | const struct mxser_cardinfo *info; | |
278 | unsigned long vector; | |
279 | unsigned long vector_mask; | |
280 | ||
281 | int chip_flag; | |
282 | int uart_type; | |
283 | ||
284 | struct mxser_port ports[MXSER_PORTS_PER_BOARD]; | |
1da177e4 LT |
285 | }; |
286 | ||
1da177e4 LT |
287 | struct mxser_mstatus { |
288 | tcflag_t cflag; | |
289 | int cts; | |
290 | int dsr; | |
291 | int ri; | |
292 | int dcd; | |
293 | }; | |
294 | ||
295 | static struct mxser_mstatus GMStatus[MXSER_PORTS]; | |
296 | ||
297 | static int mxserBoardCAP[MXSER_BOARDS] = { | |
298 | 0, 0, 0, 0 | |
8ea2c2ec | 299 | /* 0x180, 0x280, 0x200, 0x320 */ |
1da177e4 LT |
300 | }; |
301 | ||
1c45607a | 302 | static struct mxser_board mxser_boards[MXSER_BOARDS]; |
1da177e4 | 303 | static struct tty_driver *mxvar_sdriver; |
1da177e4 LT |
304 | static struct mxser_log mxvar_log; |
305 | static int mxvar_diagflag; | |
306 | static unsigned char mxser_msr[MXSER_PORTS + 1]; | |
307 | static struct mxser_mon_ext mon_data_ext; | |
308 | static int mxser_set_baud_method[MXSER_PORTS + 1]; | |
1da177e4 | 309 | |
b8cc5549 | 310 | #ifdef CONFIG_PCI |
1c45607a | 311 | static int __devinit CheckIsMoxaMust(unsigned long io) |
1da177e4 LT |
312 | { |
313 | u8 oldmcr, hwid; | |
314 | int i; | |
315 | ||
316 | outb(0, io + UART_LCR); | |
317 | DISABLE_MOXA_MUST_ENCHANCE_MODE(io); | |
318 | oldmcr = inb(io + UART_MCR); | |
319 | outb(0, io + UART_MCR); | |
320 | SET_MOXA_MUST_XON1_VALUE(io, 0x11); | |
321 | if ((hwid = inb(io + UART_MCR)) != 0) { | |
322 | outb(oldmcr, io + UART_MCR); | |
8ea2c2ec | 323 | return MOXA_OTHER_UART; |
1da177e4 LT |
324 | } |
325 | ||
326 | GET_MOXA_MUST_HARDWARE_ID(io, &hwid); | |
1c45607a JS |
327 | for (i = 1; i < UART_INFO_NUM; i++) { /* 0 = OTHER_UART */ |
328 | if (hwid == Gpci_uart_info[i].type) | |
8ea2c2ec | 329 | return (int)hwid; |
1da177e4 LT |
330 | } |
331 | return MOXA_OTHER_UART; | |
332 | } | |
b8cc5549 | 333 | #endif |
1da177e4 | 334 | |
1c45607a | 335 | static void process_txrx_fifo(struct mxser_port *info) |
1da177e4 LT |
336 | { |
337 | int i; | |
338 | ||
339 | if ((info->type == PORT_16450) || (info->type == PORT_8250)) { | |
340 | info->rx_trigger = 1; | |
341 | info->rx_high_water = 1; | |
342 | info->rx_low_water = 1; | |
343 | info->xmit_fifo_size = 1; | |
1c45607a JS |
344 | } else |
345 | for (i = 0; i < UART_INFO_NUM; i++) | |
346 | if (info->board->chip_flag == Gpci_uart_info[i].type) { | |
1da177e4 LT |
347 | info->rx_trigger = Gpci_uart_info[i].rx_trigger; |
348 | info->rx_low_water = Gpci_uart_info[i].rx_low_water; | |
349 | info->rx_high_water = Gpci_uart_info[i].rx_high_water; | |
350 | info->xmit_fifo_size = Gpci_uart_info[i].xmit_fifo_size; | |
351 | break; | |
352 | } | |
1da177e4 LT |
353 | } |
354 | ||
1c45607a | 355 | static unsigned char mxser_get_msr(int baseaddr, int mode, int port) |
1da177e4 | 356 | { |
1c45607a | 357 | unsigned char status = 0; |
1da177e4 | 358 | |
1c45607a | 359 | status = inb(baseaddr + UART_MSR); |
1da177e4 | 360 | |
1c45607a JS |
361 | mxser_msr[port] &= 0x0F; |
362 | mxser_msr[port] |= status; | |
363 | status = mxser_msr[port]; | |
364 | if (mode) | |
365 | mxser_msr[port] = 0; | |
1da177e4 | 366 | |
1c45607a JS |
367 | return status; |
368 | } | |
1da177e4 | 369 | |
1c45607a JS |
370 | static int mxser_block_til_ready(struct tty_struct *tty, struct file *filp, |
371 | struct mxser_port *port) | |
372 | { | |
373 | DECLARE_WAITQUEUE(wait, current); | |
374 | int retval; | |
375 | int do_clocal = 0; | |
376 | unsigned long flags; | |
1da177e4 | 377 | |
1c45607a JS |
378 | /* |
379 | * If non-blocking mode is set, or the port is not enabled, | |
380 | * then make the check up front and then exit. | |
381 | */ | |
382 | if ((filp->f_flags & O_NONBLOCK) || | |
383 | test_bit(TTY_IO_ERROR, &tty->flags)) { | |
384 | port->flags |= ASYNC_NORMAL_ACTIVE; | |
385 | return 0; | |
386 | } | |
1da177e4 | 387 | |
1c45607a JS |
388 | if (tty->termios->c_cflag & CLOCAL) |
389 | do_clocal = 1; | |
1da177e4 | 390 | |
1da177e4 | 391 | /* |
1c45607a JS |
392 | * Block waiting for the carrier detect and the line to become |
393 | * free (i.e., not in use by the callout). While we are in | |
394 | * this loop, port->count is dropped by one, so that | |
395 | * mxser_close() knows when to free things. We restore it upon | |
396 | * exit, either normal or abnormal. | |
1da177e4 | 397 | */ |
1c45607a JS |
398 | retval = 0; |
399 | add_wait_queue(&port->open_wait, &wait); | |
1da177e4 | 400 | |
1c45607a JS |
401 | spin_lock_irqsave(&port->slock, flags); |
402 | if (!tty_hung_up_p(filp)) | |
403 | port->count--; | |
404 | spin_unlock_irqrestore(&port->slock, flags); | |
405 | port->blocked_open++; | |
406 | while (1) { | |
407 | spin_lock_irqsave(&port->slock, flags); | |
408 | outb(inb(port->ioaddr + UART_MCR) | | |
409 | UART_MCR_DTR | UART_MCR_RTS, port->ioaddr + UART_MCR); | |
410 | spin_unlock_irqrestore(&port->slock, flags); | |
411 | set_current_state(TASK_INTERRUPTIBLE); | |
412 | if (tty_hung_up_p(filp) || !(port->flags & ASYNC_INITIALIZED)) { | |
413 | if (port->flags & ASYNC_HUP_NOTIFY) | |
414 | retval = -EAGAIN; | |
415 | else | |
416 | retval = -ERESTARTSYS; | |
417 | break; | |
418 | } | |
419 | if (!(port->flags & ASYNC_CLOSING) && | |
420 | (do_clocal || | |
421 | (inb(port->ioaddr + UART_MSR) & UART_MSR_DCD))) | |
422 | break; | |
423 | if (signal_pending(current)) { | |
424 | retval = -ERESTARTSYS; | |
425 | break; | |
426 | } | |
427 | schedule(); | |
1da177e4 | 428 | } |
1c45607a JS |
429 | set_current_state(TASK_RUNNING); |
430 | remove_wait_queue(&port->open_wait, &wait); | |
431 | if (!tty_hung_up_p(filp)) | |
432 | port->count++; | |
433 | port->blocked_open--; | |
434 | if (retval) | |
1da177e4 | 435 | return retval; |
1c45607a | 436 | port->flags |= ASYNC_NORMAL_ACTIVE; |
1da177e4 LT |
437 | return 0; |
438 | } | |
439 | ||
1c45607a | 440 | static int mxser_set_baud(struct mxser_port *info, long newspd) |
1da177e4 | 441 | { |
1c45607a JS |
442 | int quot = 0, baud; |
443 | unsigned char cval; | |
1da177e4 | 444 | |
1c45607a JS |
445 | if (!info->tty || !info->tty->termios) |
446 | return -1; | |
1da177e4 | 447 | |
1c45607a JS |
448 | if (!(info->ioaddr)) |
449 | return -1; | |
1da177e4 | 450 | |
1c45607a JS |
451 | if (newspd > info->max_baud) |
452 | return -1; | |
1da177e4 | 453 | |
1c45607a JS |
454 | if (newspd == 134) { |
455 | quot = 2 * info->baud_base / 269; | |
456 | tty_encode_baud_rate(info->tty, 134, 134); | |
457 | } else if (newspd) { | |
458 | quot = info->baud_base / newspd; | |
459 | if (quot == 0) | |
460 | quot = 1; | |
461 | baud = info->baud_base/quot; | |
462 | tty_encode_baud_rate(info->tty, baud, baud); | |
463 | } else { | |
464 | quot = 0; | |
465 | } | |
1da177e4 | 466 | |
1c45607a JS |
467 | info->timeout = ((info->xmit_fifo_size * HZ * 10 * quot) / info->baud_base); |
468 | info->timeout += HZ / 50; /* Add .02 seconds of slop */ | |
1da177e4 | 469 | |
1c45607a JS |
470 | if (quot) { |
471 | info->MCR |= UART_MCR_DTR; | |
472 | outb(info->MCR, info->ioaddr + UART_MCR); | |
473 | } else { | |
474 | info->MCR &= ~UART_MCR_DTR; | |
475 | outb(info->MCR, info->ioaddr + UART_MCR); | |
476 | return 0; | |
477 | } | |
1da177e4 | 478 | |
1c45607a | 479 | cval = inb(info->ioaddr + UART_LCR); |
1da177e4 | 480 | |
1c45607a | 481 | outb(cval | UART_LCR_DLAB, info->ioaddr + UART_LCR); /* set DLAB */ |
1da177e4 | 482 | |
1c45607a JS |
483 | outb(quot & 0xff, info->ioaddr + UART_DLL); /* LS of divisor */ |
484 | outb(quot >> 8, info->ioaddr + UART_DLM); /* MS of divisor */ | |
485 | outb(cval, info->ioaddr + UART_LCR); /* reset DLAB */ | |
1da177e4 | 486 | |
1c45607a JS |
487 | #ifdef BOTHER |
488 | if (C_BAUD(info->tty) == BOTHER) { | |
489 | quot = info->baud_base % newspd; | |
490 | quot *= 8; | |
491 | if (quot % newspd > newspd / 2) { | |
492 | quot /= newspd; | |
493 | quot++; | |
494 | } else | |
495 | quot /= newspd; | |
496 | ||
497 | SET_MOXA_MUST_ENUM_VALUE(info->ioaddr, quot); | |
498 | } else | |
499 | #endif | |
500 | SET_MOXA_MUST_ENUM_VALUE(info->ioaddr, 0); | |
1da177e4 | 501 | |
8ea2c2ec | 502 | return 0; |
1da177e4 | 503 | } |
1da177e4 | 504 | |
1c45607a JS |
505 | /* |
506 | * This routine is called to set the UART divisor registers to match | |
507 | * the specified baud rate for a serial port. | |
508 | */ | |
509 | static int mxser_change_speed(struct mxser_port *info, | |
510 | struct ktermios *old_termios) | |
1da177e4 | 511 | { |
1c45607a JS |
512 | unsigned cflag, cval, fcr; |
513 | int ret = 0; | |
514 | unsigned char status; | |
1da177e4 | 515 | |
1c45607a JS |
516 | if (!info->tty || !info->tty->termios) |
517 | return ret; | |
518 | cflag = info->tty->termios->c_cflag; | |
519 | if (!(info->ioaddr)) | |
520 | return ret; | |
1da177e4 | 521 | |
1c45607a JS |
522 | if (mxser_set_baud_method[info->tty->index] == 0) |
523 | mxser_set_baud(info, tty_get_baud_rate(info->tty)); | |
1da177e4 | 524 | |
1c45607a JS |
525 | /* byte size and parity */ |
526 | switch (cflag & CSIZE) { | |
527 | case CS5: | |
528 | cval = 0x00; | |
529 | break; | |
530 | case CS6: | |
531 | cval = 0x01; | |
532 | break; | |
533 | case CS7: | |
534 | cval = 0x02; | |
535 | break; | |
536 | case CS8: | |
537 | cval = 0x03; | |
538 | break; | |
539 | default: | |
540 | cval = 0x00; | |
541 | break; /* too keep GCC shut... */ | |
542 | } | |
543 | if (cflag & CSTOPB) | |
544 | cval |= 0x04; | |
545 | if (cflag & PARENB) | |
546 | cval |= UART_LCR_PARITY; | |
547 | if (!(cflag & PARODD)) | |
548 | cval |= UART_LCR_EPAR; | |
549 | if (cflag & CMSPAR) | |
550 | cval |= UART_LCR_SPAR; | |
1da177e4 | 551 | |
1c45607a JS |
552 | if ((info->type == PORT_8250) || (info->type == PORT_16450)) { |
553 | if (info->board->chip_flag) { | |
554 | fcr = UART_FCR_ENABLE_FIFO; | |
555 | fcr |= MOXA_MUST_FCR_GDA_MODE_ENABLE; | |
556 | SET_MOXA_MUST_FIFO_VALUE(info); | |
557 | } else | |
558 | fcr = 0; | |
559 | } else { | |
560 | fcr = UART_FCR_ENABLE_FIFO; | |
561 | if (info->board->chip_flag) { | |
562 | fcr |= MOXA_MUST_FCR_GDA_MODE_ENABLE; | |
563 | SET_MOXA_MUST_FIFO_VALUE(info); | |
564 | } else { | |
565 | switch (info->rx_trigger) { | |
566 | case 1: | |
567 | fcr |= UART_FCR_TRIGGER_1; | |
568 | break; | |
569 | case 4: | |
570 | fcr |= UART_FCR_TRIGGER_4; | |
571 | break; | |
572 | case 8: | |
573 | fcr |= UART_FCR_TRIGGER_8; | |
574 | break; | |
575 | default: | |
576 | fcr |= UART_FCR_TRIGGER_14; | |
577 | break; | |
578 | } | |
1da177e4 | 579 | } |
1da177e4 LT |
580 | } |
581 | ||
1c45607a JS |
582 | /* CTS flow control flag and modem status interrupts */ |
583 | info->IER &= ~UART_IER_MSI; | |
584 | info->MCR &= ~UART_MCR_AFE; | |
585 | if (cflag & CRTSCTS) { | |
586 | info->flags |= ASYNC_CTS_FLOW; | |
587 | info->IER |= UART_IER_MSI; | |
588 | if ((info->type == PORT_16550A) || (info->board->chip_flag)) { | |
589 | info->MCR |= UART_MCR_AFE; | |
590 | } else { | |
591 | status = inb(info->ioaddr + UART_MSR); | |
592 | if (info->tty->hw_stopped) { | |
593 | if (status & UART_MSR_CTS) { | |
594 | info->tty->hw_stopped = 0; | |
595 | if (info->type != PORT_16550A && | |
596 | !info->board->chip_flag) { | |
597 | outb(info->IER & ~UART_IER_THRI, | |
598 | info->ioaddr + | |
599 | UART_IER); | |
600 | info->IER |= UART_IER_THRI; | |
601 | outb(info->IER, info->ioaddr + | |
602 | UART_IER); | |
603 | } | |
604 | tty_wakeup(info->tty); | |
605 | } | |
606 | } else { | |
607 | if (!(status & UART_MSR_CTS)) { | |
608 | info->tty->hw_stopped = 1; | |
609 | if ((info->type != PORT_16550A) && | |
610 | (!info->board->chip_flag)) { | |
611 | info->IER &= ~UART_IER_THRI; | |
612 | outb(info->IER, info->ioaddr + | |
613 | UART_IER); | |
614 | } | |
615 | } | |
616 | } | |
1da177e4 | 617 | } |
1c45607a JS |
618 | } else { |
619 | info->flags &= ~ASYNC_CTS_FLOW; | |
620 | } | |
621 | outb(info->MCR, info->ioaddr + UART_MCR); | |
622 | if (cflag & CLOCAL) { | |
623 | info->flags &= ~ASYNC_CHECK_CD; | |
624 | } else { | |
625 | info->flags |= ASYNC_CHECK_CD; | |
626 | info->IER |= UART_IER_MSI; | |
627 | } | |
628 | outb(info->IER, info->ioaddr + UART_IER); | |
629 | ||
630 | /* | |
631 | * Set up parity check flag | |
632 | */ | |
633 | info->read_status_mask = UART_LSR_OE | UART_LSR_THRE | UART_LSR_DR; | |
634 | if (I_INPCK(info->tty)) | |
635 | info->read_status_mask |= UART_LSR_FE | UART_LSR_PE; | |
636 | if (I_BRKINT(info->tty) || I_PARMRK(info->tty)) | |
637 | info->read_status_mask |= UART_LSR_BI; | |
1da177e4 | 638 | |
1c45607a | 639 | info->ignore_status_mask = 0; |
1da177e4 | 640 | |
1c45607a JS |
641 | if (I_IGNBRK(info->tty)) { |
642 | info->ignore_status_mask |= UART_LSR_BI; | |
643 | info->read_status_mask |= UART_LSR_BI; | |
8ea2c2ec | 644 | /* |
1c45607a JS |
645 | * If we're ignore parity and break indicators, ignore |
646 | * overruns too. (For real raw support). | |
8ea2c2ec | 647 | */ |
1c45607a JS |
648 | if (I_IGNPAR(info->tty)) { |
649 | info->ignore_status_mask |= | |
650 | UART_LSR_OE | | |
651 | UART_LSR_PE | | |
652 | UART_LSR_FE; | |
653 | info->read_status_mask |= | |
654 | UART_LSR_OE | | |
655 | UART_LSR_PE | | |
656 | UART_LSR_FE; | |
657 | } | |
1da177e4 | 658 | } |
1c45607a JS |
659 | if (info->board->chip_flag) { |
660 | SET_MOXA_MUST_XON1_VALUE(info->ioaddr, START_CHAR(info->tty)); | |
661 | SET_MOXA_MUST_XOFF1_VALUE(info->ioaddr, STOP_CHAR(info->tty)); | |
662 | if (I_IXON(info->tty)) { | |
663 | ENABLE_MOXA_MUST_RX_SOFTWARE_FLOW_CONTROL(info->ioaddr); | |
664 | } else { | |
665 | DISABLE_MOXA_MUST_RX_SOFTWARE_FLOW_CONTROL(info->ioaddr); | |
1da177e4 | 666 | } |
1c45607a JS |
667 | if (I_IXOFF(info->tty)) { |
668 | ENABLE_MOXA_MUST_TX_SOFTWARE_FLOW_CONTROL(info->ioaddr); | |
669 | } else { | |
670 | DISABLE_MOXA_MUST_TX_SOFTWARE_FLOW_CONTROL(info->ioaddr); | |
1da177e4 LT |
671 | } |
672 | } | |
1da177e4 | 673 | |
1da177e4 | 674 | |
1c45607a JS |
675 | outb(fcr, info->ioaddr + UART_FCR); /* set fcr */ |
676 | outb(cval, info->ioaddr + UART_LCR); | |
1da177e4 | 677 | |
1c45607a | 678 | return ret; |
1da177e4 LT |
679 | } |
680 | ||
1c45607a | 681 | static void mxser_check_modem_status(struct mxser_port *port, int status) |
1da177e4 | 682 | { |
1c45607a JS |
683 | /* update input line counters */ |
684 | if (status & UART_MSR_TERI) | |
685 | port->icount.rng++; | |
686 | if (status & UART_MSR_DDSR) | |
687 | port->icount.dsr++; | |
688 | if (status & UART_MSR_DDCD) | |
689 | port->icount.dcd++; | |
690 | if (status & UART_MSR_DCTS) | |
691 | port->icount.cts++; | |
692 | port->mon_data.modem_status = status; | |
693 | wake_up_interruptible(&port->delta_msr_wait); | |
1da177e4 | 694 | |
1c45607a JS |
695 | if ((port->flags & ASYNC_CHECK_CD) && (status & UART_MSR_DDCD)) { |
696 | if (status & UART_MSR_DCD) | |
697 | wake_up_interruptible(&port->open_wait); | |
698 | } | |
1da177e4 | 699 | |
1c45607a JS |
700 | if (port->flags & ASYNC_CTS_FLOW) { |
701 | if (port->tty->hw_stopped) { | |
702 | if (status & UART_MSR_CTS) { | |
703 | port->tty->hw_stopped = 0; | |
704 | ||
705 | if ((port->type != PORT_16550A) && | |
706 | (!port->board->chip_flag)) { | |
707 | outb(port->IER & ~UART_IER_THRI, | |
708 | port->ioaddr + UART_IER); | |
709 | port->IER |= UART_IER_THRI; | |
710 | outb(port->IER, port->ioaddr + | |
711 | UART_IER); | |
712 | } | |
713 | tty_wakeup(port->tty); | |
714 | } | |
715 | } else { | |
716 | if (!(status & UART_MSR_CTS)) { | |
717 | port->tty->hw_stopped = 1; | |
718 | if (port->type != PORT_16550A && | |
719 | !port->board->chip_flag) { | |
720 | port->IER &= ~UART_IER_THRI; | |
721 | outb(port->IER, port->ioaddr + | |
722 | UART_IER); | |
723 | } | |
724 | } | |
725 | } | |
1da177e4 LT |
726 | } |
727 | } | |
728 | ||
1c45607a | 729 | static int mxser_startup(struct mxser_port *info) |
1da177e4 | 730 | { |
1c45607a JS |
731 | unsigned long page; |
732 | unsigned long flags; | |
1da177e4 | 733 | |
1c45607a JS |
734 | page = __get_free_page(GFP_KERNEL); |
735 | if (!page) | |
736 | return -ENOMEM; | |
1da177e4 | 737 | |
1c45607a | 738 | spin_lock_irqsave(&info->slock, flags); |
1da177e4 | 739 | |
1c45607a JS |
740 | if (info->flags & ASYNC_INITIALIZED) { |
741 | free_page(page); | |
742 | spin_unlock_irqrestore(&info->slock, flags); | |
743 | return 0; | |
744 | } | |
6f08b72c | 745 | |
1c45607a JS |
746 | if (!info->ioaddr || !info->type) { |
747 | if (info->tty) | |
748 | set_bit(TTY_IO_ERROR, &info->tty->flags); | |
749 | free_page(page); | |
750 | spin_unlock_irqrestore(&info->slock, flags); | |
1da177e4 | 751 | return 0; |
1c45607a JS |
752 | } |
753 | if (info->xmit_buf) | |
754 | free_page(page); | |
755 | else | |
756 | info->xmit_buf = (unsigned char *) page; | |
1da177e4 | 757 | |
1da177e4 | 758 | /* |
1c45607a JS |
759 | * Clear the FIFO buffers and disable them |
760 | * (they will be reenabled in mxser_change_speed()) | |
1da177e4 | 761 | */ |
1c45607a JS |
762 | if (info->board->chip_flag) |
763 | outb((UART_FCR_CLEAR_RCVR | | |
764 | UART_FCR_CLEAR_XMIT | | |
765 | MOXA_MUST_FCR_GDA_MODE_ENABLE), info->ioaddr + UART_FCR); | |
766 | else | |
767 | outb((UART_FCR_CLEAR_RCVR | UART_FCR_CLEAR_XMIT), | |
768 | info->ioaddr + UART_FCR); | |
1da177e4 | 769 | |
1c45607a JS |
770 | /* |
771 | * At this point there's no way the LSR could still be 0xFF; | |
772 | * if it is, then bail out, because there's likely no UART | |
773 | * here. | |
774 | */ | |
775 | if (inb(info->ioaddr + UART_LSR) == 0xff) { | |
776 | spin_unlock_irqrestore(&info->slock, flags); | |
777 | if (capable(CAP_SYS_ADMIN)) { | |
778 | if (info->tty) | |
779 | set_bit(TTY_IO_ERROR, &info->tty->flags); | |
780 | return 0; | |
781 | } else | |
782 | return -ENODEV; | |
783 | } | |
1da177e4 | 784 | |
1c45607a JS |
785 | /* |
786 | * Clear the interrupt registers. | |
787 | */ | |
788 | (void) inb(info->ioaddr + UART_LSR); | |
789 | (void) inb(info->ioaddr + UART_RX); | |
790 | (void) inb(info->ioaddr + UART_IIR); | |
791 | (void) inb(info->ioaddr + UART_MSR); | |
792 | ||
793 | /* | |
794 | * Now, initialize the UART | |
795 | */ | |
796 | outb(UART_LCR_WLEN8, info->ioaddr + UART_LCR); /* reset DLAB */ | |
797 | info->MCR = UART_MCR_DTR | UART_MCR_RTS; | |
798 | outb(info->MCR, info->ioaddr + UART_MCR); | |
799 | ||
800 | /* | |
801 | * Finally, enable interrupts | |
802 | */ | |
803 | info->IER = UART_IER_MSI | UART_IER_RLSI | UART_IER_RDI; | |
804 | ||
805 | if (info->board->chip_flag) | |
806 | info->IER |= MOXA_MUST_IER_EGDAI; | |
807 | outb(info->IER, info->ioaddr + UART_IER); /* enable interrupts */ | |
808 | ||
809 | /* | |
810 | * And clear the interrupt registers again for luck. | |
811 | */ | |
812 | (void) inb(info->ioaddr + UART_LSR); | |
813 | (void) inb(info->ioaddr + UART_RX); | |
814 | (void) inb(info->ioaddr + UART_IIR); | |
815 | (void) inb(info->ioaddr + UART_MSR); | |
816 | ||
817 | if (info->tty) | |
818 | clear_bit(TTY_IO_ERROR, &info->tty->flags); | |
819 | info->xmit_cnt = info->xmit_head = info->xmit_tail = 0; | |
820 | ||
821 | /* | |
822 | * and set the speed of the serial port | |
823 | */ | |
824 | mxser_change_speed(info, NULL); | |
825 | info->flags |= ASYNC_INITIALIZED; | |
826 | spin_unlock_irqrestore(&info->slock, flags); | |
827 | ||
828 | return 0; | |
829 | } | |
830 | ||
831 | /* | |
832 | * This routine will shutdown a serial port; interrupts maybe disabled, and | |
833 | * DTR is dropped if the hangup on close termio flag is on. | |
834 | */ | |
835 | static void mxser_shutdown(struct mxser_port *info) | |
836 | { | |
837 | unsigned long flags; | |
838 | ||
839 | if (!(info->flags & ASYNC_INITIALIZED)) | |
840 | return; | |
841 | ||
842 | spin_lock_irqsave(&info->slock, flags); | |
843 | ||
844 | /* | |
845 | * clear delta_msr_wait queue to avoid mem leaks: we may free the irq | |
846 | * here so the queue might never be waken up | |
847 | */ | |
848 | wake_up_interruptible(&info->delta_msr_wait); | |
849 | ||
850 | /* | |
851 | * Free the IRQ, if necessary | |
852 | */ | |
853 | if (info->xmit_buf) { | |
854 | free_page((unsigned long) info->xmit_buf); | |
855 | info->xmit_buf = NULL; | |
1da177e4 LT |
856 | } |
857 | ||
1c45607a JS |
858 | info->IER = 0; |
859 | outb(0x00, info->ioaddr + UART_IER); | |
860 | ||
861 | if (!info->tty || (info->tty->termios->c_cflag & HUPCL)) | |
862 | info->MCR &= ~(UART_MCR_DTR | UART_MCR_RTS); | |
863 | outb(info->MCR, info->ioaddr + UART_MCR); | |
864 | ||
865 | /* clear Rx/Tx FIFO's */ | |
866 | if (info->board->chip_flag) | |
867 | outb(UART_FCR_CLEAR_RCVR | UART_FCR_CLEAR_XMIT | | |
868 | MOXA_MUST_FCR_GDA_MODE_ENABLE, | |
869 | info->ioaddr + UART_FCR); | |
870 | else | |
871 | outb(UART_FCR_CLEAR_RCVR | UART_FCR_CLEAR_XMIT, | |
872 | info->ioaddr + UART_FCR); | |
873 | ||
874 | /* read data port to reset things */ | |
875 | (void) inb(info->ioaddr + UART_RX); | |
876 | ||
877 | if (info->tty) | |
878 | set_bit(TTY_IO_ERROR, &info->tty->flags); | |
879 | ||
880 | info->flags &= ~ASYNC_INITIALIZED; | |
881 | ||
882 | if (info->board->chip_flag) | |
883 | SET_MOXA_MUST_NO_SOFTWARE_FLOW_CONTROL(info->ioaddr); | |
884 | ||
885 | spin_unlock_irqrestore(&info->slock, flags); | |
886 | } | |
887 | ||
888 | /* | |
889 | * This routine is called whenever a serial port is opened. It | |
890 | * enables interrupts for a serial port, linking in its async structure into | |
891 | * the IRQ chain. It also performs the serial-specific | |
892 | * initialization for the tty structure. | |
893 | */ | |
894 | static int mxser_open(struct tty_struct *tty, struct file *filp) | |
895 | { | |
896 | struct mxser_port *info; | |
897 | unsigned long flags; | |
898 | int retval, line; | |
899 | ||
900 | line = tty->index; | |
901 | if (line == MXSER_PORTS) | |
902 | return 0; | |
903 | if (line < 0 || line > MXSER_PORTS) | |
904 | return -ENODEV; | |
905 | info = &mxser_boards[line / MXSER_PORTS_PER_BOARD].ports[line % MXSER_PORTS_PER_BOARD]; | |
906 | if (!info->ioaddr) | |
907 | return -ENODEV; | |
908 | ||
909 | tty->driver_data = info; | |
910 | info->tty = tty; | |
8ea2c2ec | 911 | /* |
1c45607a JS |
912 | * Start up serial port |
913 | */ | |
914 | spin_lock_irqsave(&info->slock, flags); | |
915 | info->count++; | |
916 | spin_unlock_irqrestore(&info->slock, flags); | |
917 | retval = mxser_startup(info); | |
918 | if (retval) | |
919 | return retval; | |
920 | ||
921 | retval = mxser_block_til_ready(tty, filp, info); | |
922 | if (retval) | |
923 | return retval; | |
1da177e4 | 924 | |
8cddd707 | 925 | /* unmark here for very high baud rate (ex. 921600 bps) used */ |
1da177e4 LT |
926 | tty->low_latency = 1; |
927 | return 0; | |
928 | } | |
929 | ||
930 | /* | |
931 | * This routine is called when the serial port gets closed. First, we | |
932 | * wait for the last remaining data to be sent. Then, we unlink its | |
933 | * async structure from the interrupt chain if necessary, and we free | |
934 | * that IRQ if nothing is left in the chain. | |
935 | */ | |
936 | static void mxser_close(struct tty_struct *tty, struct file *filp) | |
937 | { | |
1c45607a | 938 | struct mxser_port *info = tty->driver_data; |
1da177e4 LT |
939 | |
940 | unsigned long timeout; | |
941 | unsigned long flags; | |
1da177e4 LT |
942 | |
943 | if (tty->index == MXSER_PORTS) | |
944 | return; | |
945 | if (!info) | |
6f08b72c | 946 | return; |
1da177e4 LT |
947 | |
948 | spin_lock_irqsave(&info->slock, flags); | |
949 | ||
950 | if (tty_hung_up_p(filp)) { | |
951 | spin_unlock_irqrestore(&info->slock, flags); | |
952 | return; | |
953 | } | |
954 | if ((tty->count == 1) && (info->count != 1)) { | |
955 | /* | |
956 | * Uh, oh. tty->count is 1, which means that the tty | |
957 | * structure will be freed. Info->count should always | |
958 | * be one in these conditions. If it's greater than | |
959 | * one, we've got real problems, since it means the | |
960 | * serial port won't be shutdown. | |
961 | */ | |
8ea2c2ec JJ |
962 | printk(KERN_ERR "mxser_close: bad serial port count; " |
963 | "tty->count is 1, info->count is %d\n", info->count); | |
1da177e4 LT |
964 | info->count = 1; |
965 | } | |
966 | if (--info->count < 0) { | |
8ea2c2ec | 967 | printk(KERN_ERR "mxser_close: bad serial port count for " |
1c45607a | 968 | "ttys%d: %d\n", tty->index, info->count); |
1da177e4 LT |
969 | info->count = 0; |
970 | } | |
971 | if (info->count) { | |
972 | spin_unlock_irqrestore(&info->slock, flags); | |
973 | return; | |
974 | } | |
975 | info->flags |= ASYNC_CLOSING; | |
976 | spin_unlock_irqrestore(&info->slock, flags); | |
977 | /* | |
978 | * Save the termios structure, since this port may have | |
979 | * separate termios for callout and dialin. | |
980 | */ | |
981 | if (info->flags & ASYNC_NORMAL_ACTIVE) | |
982 | info->normal_termios = *tty->termios; | |
983 | /* | |
984 | * Now we wait for the transmit buffer to clear; and we notify | |
985 | * the line discipline to only process XON/XOFF characters. | |
986 | */ | |
987 | tty->closing = 1; | |
988 | if (info->closing_wait != ASYNC_CLOSING_WAIT_NONE) | |
989 | tty_wait_until_sent(tty, info->closing_wait); | |
990 | /* | |
991 | * At this point we stop accepting input. To do this, we | |
992 | * disable the receive line status interrupts, and tell the | |
993 | * interrupt driver to stop checking the data ready bit in the | |
994 | * line status register. | |
995 | */ | |
996 | info->IER &= ~UART_IER_RLSI; | |
1c45607a | 997 | if (info->board->chip_flag) |
1da177e4 | 998 | info->IER &= ~MOXA_MUST_RECV_ISR; |
1c45607a | 999 | |
1da177e4 | 1000 | if (info->flags & ASYNC_INITIALIZED) { |
1c45607a | 1001 | outb(info->IER, info->ioaddr + UART_IER); |
1da177e4 LT |
1002 | /* |
1003 | * Before we drop DTR, make sure the UART transmitter | |
1004 | * has completely drained; this is especially | |
1005 | * important if there is a transmit FIFO! | |
1006 | */ | |
1007 | timeout = jiffies + HZ; | |
1c45607a | 1008 | while (!(inb(info->ioaddr + UART_LSR) & UART_LSR_TEMT)) { |
da4cd8df | 1009 | schedule_timeout_interruptible(5); |
1da177e4 LT |
1010 | if (time_after(jiffies, timeout)) |
1011 | break; | |
1012 | } | |
1013 | } | |
1014 | mxser_shutdown(info); | |
1015 | ||
1016 | if (tty->driver->flush_buffer) | |
1017 | tty->driver->flush_buffer(tty); | |
1c45607a JS |
1018 | |
1019 | tty_ldisc_flush(tty); | |
1020 | ||
1da177e4 LT |
1021 | tty->closing = 0; |
1022 | info->event = 0; | |
1023 | info->tty = NULL; | |
1024 | if (info->blocked_open) { | |
da4cd8df NA |
1025 | if (info->close_delay) |
1026 | schedule_timeout_interruptible(info->close_delay); | |
1da177e4 LT |
1027 | wake_up_interruptible(&info->open_wait); |
1028 | } | |
1029 | ||
1030 | info->flags &= ~(ASYNC_NORMAL_ACTIVE | ASYNC_CLOSING); | |
1da177e4 LT |
1031 | } |
1032 | ||
1033 | static int mxser_write(struct tty_struct *tty, const unsigned char *buf, int count) | |
1034 | { | |
1035 | int c, total = 0; | |
1c45607a | 1036 | struct mxser_port *info = tty->driver_data; |
1da177e4 LT |
1037 | unsigned long flags; |
1038 | ||
8a7f7c93 | 1039 | if (!info->xmit_buf) |
8ea2c2ec | 1040 | return 0; |
1da177e4 LT |
1041 | |
1042 | while (1) { | |
8ea2c2ec JJ |
1043 | c = min_t(int, count, min(SERIAL_XMIT_SIZE - info->xmit_cnt - 1, |
1044 | SERIAL_XMIT_SIZE - info->xmit_head)); | |
1da177e4 LT |
1045 | if (c <= 0) |
1046 | break; | |
1047 | ||
1048 | memcpy(info->xmit_buf + info->xmit_head, buf, c); | |
1049 | spin_lock_irqsave(&info->slock, flags); | |
8ea2c2ec JJ |
1050 | info->xmit_head = (info->xmit_head + c) & |
1051 | (SERIAL_XMIT_SIZE - 1); | |
1da177e4 LT |
1052 | info->xmit_cnt += c; |
1053 | spin_unlock_irqrestore(&info->slock, flags); | |
1054 | ||
1055 | buf += c; | |
1056 | count -= c; | |
1057 | total += c; | |
1da177e4 LT |
1058 | } |
1059 | ||
1c45607a | 1060 | if (info->xmit_cnt && !tty->stopped) { |
8ea2c2ec JJ |
1061 | if (!tty->hw_stopped || |
1062 | (info->type == PORT_16550A) || | |
1c45607a | 1063 | (info->board->chip_flag)) { |
1da177e4 | 1064 | spin_lock_irqsave(&info->slock, flags); |
1c45607a JS |
1065 | outb(info->IER & ~UART_IER_THRI, info->ioaddr + |
1066 | UART_IER); | |
1da177e4 | 1067 | info->IER |= UART_IER_THRI; |
1c45607a | 1068 | outb(info->IER, info->ioaddr + UART_IER); |
1da177e4 LT |
1069 | spin_unlock_irqrestore(&info->slock, flags); |
1070 | } | |
1071 | } | |
1072 | return total; | |
1073 | } | |
1074 | ||
1075 | static void mxser_put_char(struct tty_struct *tty, unsigned char ch) | |
1076 | { | |
1c45607a | 1077 | struct mxser_port *info = tty->driver_data; |
1da177e4 LT |
1078 | unsigned long flags; |
1079 | ||
8a7f7c93 | 1080 | if (!info->xmit_buf) |
1da177e4 LT |
1081 | return; |
1082 | ||
1083 | if (info->xmit_cnt >= SERIAL_XMIT_SIZE - 1) | |
1084 | return; | |
1085 | ||
1086 | spin_lock_irqsave(&info->slock, flags); | |
1087 | info->xmit_buf[info->xmit_head++] = ch; | |
1088 | info->xmit_head &= SERIAL_XMIT_SIZE - 1; | |
1089 | info->xmit_cnt++; | |
1090 | spin_unlock_irqrestore(&info->slock, flags); | |
1c45607a | 1091 | if (!tty->stopped) { |
8ea2c2ec JJ |
1092 | if (!tty->hw_stopped || |
1093 | (info->type == PORT_16550A) || | |
1c45607a | 1094 | info->board->chip_flag) { |
1da177e4 | 1095 | spin_lock_irqsave(&info->slock, flags); |
1c45607a | 1096 | outb(info->IER & ~UART_IER_THRI, info->ioaddr + UART_IER); |
1da177e4 | 1097 | info->IER |= UART_IER_THRI; |
1c45607a | 1098 | outb(info->IER, info->ioaddr + UART_IER); |
1da177e4 LT |
1099 | spin_unlock_irqrestore(&info->slock, flags); |
1100 | } | |
1101 | } | |
1102 | } | |
1103 | ||
1104 | ||
1105 | static void mxser_flush_chars(struct tty_struct *tty) | |
1106 | { | |
1c45607a | 1107 | struct mxser_port *info = tty->driver_data; |
1da177e4 LT |
1108 | unsigned long flags; |
1109 | ||
8ea2c2ec JJ |
1110 | if (info->xmit_cnt <= 0 || |
1111 | tty->stopped || | |
1112 | !info->xmit_buf || | |
1113 | (tty->hw_stopped && | |
1114 | (info->type != PORT_16550A) && | |
1c45607a | 1115 | (!info->board->chip_flag) |
8ea2c2ec | 1116 | )) |
1da177e4 LT |
1117 | return; |
1118 | ||
1119 | spin_lock_irqsave(&info->slock, flags); | |
1120 | ||
1c45607a | 1121 | outb(info->IER & ~UART_IER_THRI, info->ioaddr + UART_IER); |
1da177e4 | 1122 | info->IER |= UART_IER_THRI; |
1c45607a | 1123 | outb(info->IER, info->ioaddr + UART_IER); |
1da177e4 LT |
1124 | |
1125 | spin_unlock_irqrestore(&info->slock, flags); | |
1126 | } | |
1127 | ||
1128 | static int mxser_write_room(struct tty_struct *tty) | |
1129 | { | |
1c45607a | 1130 | struct mxser_port *info = tty->driver_data; |
1da177e4 LT |
1131 | int ret; |
1132 | ||
1133 | ret = SERIAL_XMIT_SIZE - info->xmit_cnt - 1; | |
1134 | if (ret < 0) | |
1135 | ret = 0; | |
8ea2c2ec | 1136 | return ret; |
1da177e4 LT |
1137 | } |
1138 | ||
1139 | static int mxser_chars_in_buffer(struct tty_struct *tty) | |
1140 | { | |
1c45607a | 1141 | struct mxser_port *info = tty->driver_data; |
1da177e4 LT |
1142 | return info->xmit_cnt; |
1143 | } | |
1144 | ||
1145 | static void mxser_flush_buffer(struct tty_struct *tty) | |
1146 | { | |
1c45607a | 1147 | struct mxser_port *info = tty->driver_data; |
1da177e4 LT |
1148 | char fcr; |
1149 | unsigned long flags; | |
1150 | ||
1151 | ||
1152 | spin_lock_irqsave(&info->slock, flags); | |
1153 | info->xmit_cnt = info->xmit_head = info->xmit_tail = 0; | |
1154 | ||
1c45607a | 1155 | fcr = inb(info->ioaddr + UART_FCR); |
8ea2c2ec | 1156 | outb((fcr | UART_FCR_CLEAR_RCVR | UART_FCR_CLEAR_XMIT), |
1c45607a JS |
1157 | info->ioaddr + UART_FCR); |
1158 | outb(fcr, info->ioaddr + UART_FCR); | |
1da177e4 LT |
1159 | |
1160 | spin_unlock_irqrestore(&info->slock, flags); | |
1da177e4 | 1161 | |
b963a844 | 1162 | tty_wakeup(tty); |
1da177e4 LT |
1163 | } |
1164 | ||
1c45607a JS |
1165 | /* |
1166 | * ------------------------------------------------------------ | |
1167 | * friends of mxser_ioctl() | |
1168 | * ------------------------------------------------------------ | |
1169 | */ | |
1170 | static int mxser_get_serial_info(struct mxser_port *info, | |
1171 | struct serial_struct __user *retinfo) | |
1172 | { | |
1173 | struct serial_struct tmp = { | |
1174 | .type = info->type, | |
1175 | .line = info->tty->index, | |
1176 | .port = info->ioaddr, | |
1177 | .irq = info->board->irq, | |
1178 | .flags = info->flags, | |
1179 | .baud_base = info->baud_base, | |
1180 | .close_delay = info->close_delay, | |
1181 | .closing_wait = info->closing_wait, | |
1182 | .custom_divisor = info->custom_divisor, | |
1183 | .hub6 = 0 | |
1184 | }; | |
1185 | if (copy_to_user(retinfo, &tmp, sizeof(*retinfo))) | |
1186 | return -EFAULT; | |
1187 | return 0; | |
1188 | } | |
1189 | ||
1190 | static int mxser_set_serial_info(struct mxser_port *info, | |
1191 | struct serial_struct __user *new_info) | |
1da177e4 | 1192 | { |
1c45607a | 1193 | struct serial_struct new_serial; |
80ff8a80 | 1194 | speed_t baud; |
1c45607a JS |
1195 | unsigned long sl_flags; |
1196 | unsigned int flags; | |
1197 | int retval = 0; | |
1da177e4 | 1198 | |
1c45607a | 1199 | if (!new_info || !info->ioaddr) |
80ff8a80 | 1200 | return -ENODEV; |
1c45607a JS |
1201 | if (copy_from_user(&new_serial, new_info, sizeof(new_serial))) |
1202 | return -EFAULT; | |
1da177e4 | 1203 | |
80ff8a80 JS |
1204 | if (new_serial.irq != info->board->irq || |
1205 | new_serial.port != info->ioaddr) | |
1206 | return -EINVAL; | |
1da177e4 | 1207 | |
1c45607a | 1208 | flags = info->flags & ASYNC_SPD_MASK; |
1da177e4 | 1209 | |
1c45607a JS |
1210 | if (!capable(CAP_SYS_ADMIN)) { |
1211 | if ((new_serial.baud_base != info->baud_base) || | |
1212 | (new_serial.close_delay != info->close_delay) || | |
1213 | ((new_serial.flags & ~ASYNC_USR_MASK) != (info->flags & ~ASYNC_USR_MASK))) | |
1214 | return -EPERM; | |
1215 | info->flags = ((info->flags & ~ASYNC_USR_MASK) | | |
1216 | (new_serial.flags & ASYNC_USR_MASK)); | |
1217 | } else { | |
1da177e4 | 1218 | /* |
1c45607a JS |
1219 | * OK, past this point, all the error checking has been done. |
1220 | * At this point, we start making changes..... | |
1da177e4 | 1221 | */ |
1c45607a JS |
1222 | info->flags = ((info->flags & ~ASYNC_FLAGS) | |
1223 | (new_serial.flags & ASYNC_FLAGS)); | |
1224 | info->close_delay = new_serial.close_delay * HZ / 100; | |
1225 | info->closing_wait = new_serial.closing_wait * HZ / 100; | |
1226 | info->tty->low_latency = | |
1227 | (info->flags & ASYNC_LOW_LATENCY) ? 1 : 0; | |
1228 | info->tty->low_latency = 0; | |
80ff8a80 JS |
1229 | if ((info->flags & ASYNC_SPD_MASK) == ASYNC_SPD_CUST && |
1230 | (new_serial.baud_base != info->baud_base || | |
1231 | new_serial.custom_divisor != | |
1232 | info->custom_divisor)) { | |
1233 | baud = new_serial.baud_base / new_serial.custom_divisor; | |
1234 | tty_encode_baud_rate(info->tty, baud, baud); | |
1235 | } | |
1c45607a | 1236 | } |
fc83815c | 1237 | |
1c45607a | 1238 | info->type = new_serial.type; |
1da177e4 | 1239 | |
1c45607a JS |
1240 | process_txrx_fifo(info); |
1241 | ||
1242 | if (info->flags & ASYNC_INITIALIZED) { | |
1243 | if (flags != (info->flags & ASYNC_SPD_MASK)) { | |
1244 | spin_lock_irqsave(&info->slock, sl_flags); | |
1245 | mxser_change_speed(info, NULL); | |
1246 | spin_unlock_irqrestore(&info->slock, sl_flags); | |
1da177e4 | 1247 | } |
1c45607a JS |
1248 | } else |
1249 | retval = mxser_startup(info); | |
1da177e4 | 1250 | |
1c45607a JS |
1251 | return retval; |
1252 | } | |
1da177e4 | 1253 | |
1c45607a JS |
1254 | /* |
1255 | * mxser_get_lsr_info - get line status register info | |
1256 | * | |
1257 | * Purpose: Let user call ioctl() to get info when the UART physically | |
1258 | * is emptied. On bus types like RS485, the transmitter must | |
1259 | * release the bus after transmitting. This must be done when | |
1260 | * the transmit shift register is empty, not be done when the | |
1261 | * transmit holding register is empty. This functionality | |
1262 | * allows an RS485 driver to be written in user space. | |
1263 | */ | |
1264 | static int mxser_get_lsr_info(struct mxser_port *info, | |
1265 | unsigned int __user *value) | |
1266 | { | |
1267 | unsigned char status; | |
1268 | unsigned int result; | |
1269 | unsigned long flags; | |
1da177e4 | 1270 | |
1c45607a JS |
1271 | spin_lock_irqsave(&info->slock, flags); |
1272 | status = inb(info->ioaddr + UART_LSR); | |
1273 | spin_unlock_irqrestore(&info->slock, flags); | |
1274 | result = ((status & UART_LSR_TEMT) ? TIOCSER_TEMT : 0); | |
1275 | return put_user(result, value); | |
1276 | } | |
1da177e4 | 1277 | |
1c45607a JS |
1278 | /* |
1279 | * This routine sends a break character out the serial port. | |
1280 | */ | |
1281 | static void mxser_send_break(struct mxser_port *info, int duration) | |
1282 | { | |
1283 | unsigned long flags; | |
1da177e4 | 1284 | |
1c45607a JS |
1285 | if (!info->ioaddr) |
1286 | return; | |
1287 | set_current_state(TASK_INTERRUPTIBLE); | |
1288 | spin_lock_irqsave(&info->slock, flags); | |
1289 | outb(inb(info->ioaddr + UART_LCR) | UART_LCR_SBC, | |
1290 | info->ioaddr + UART_LCR); | |
1291 | spin_unlock_irqrestore(&info->slock, flags); | |
1292 | schedule_timeout(duration); | |
1293 | spin_lock_irqsave(&info->slock, flags); | |
1294 | outb(inb(info->ioaddr + UART_LCR) & ~UART_LCR_SBC, | |
1295 | info->ioaddr + UART_LCR); | |
1296 | spin_unlock_irqrestore(&info->slock, flags); | |
1297 | } | |
1da177e4 | 1298 | |
1c45607a JS |
1299 | static int mxser_tiocmget(struct tty_struct *tty, struct file *file) |
1300 | { | |
1301 | struct mxser_port *info = tty->driver_data; | |
1302 | unsigned char control, status; | |
1303 | unsigned long flags; | |
1da177e4 | 1304 | |
8ea2c2ec | 1305 | |
1c45607a JS |
1306 | if (tty->index == MXSER_PORTS) |
1307 | return -ENOIOCTLCMD; | |
1308 | if (test_bit(TTY_IO_ERROR, &tty->flags)) | |
1309 | return -EIO; | |
1da177e4 | 1310 | |
1c45607a | 1311 | control = info->MCR; |
1da177e4 | 1312 | |
1c45607a JS |
1313 | spin_lock_irqsave(&info->slock, flags); |
1314 | status = inb(info->ioaddr + UART_MSR); | |
1315 | if (status & UART_MSR_ANY_DELTA) | |
1316 | mxser_check_modem_status(info, status); | |
1317 | spin_unlock_irqrestore(&info->slock, flags); | |
1318 | return ((control & UART_MCR_RTS) ? TIOCM_RTS : 0) | | |
1319 | ((control & UART_MCR_DTR) ? TIOCM_DTR : 0) | | |
1320 | ((status & UART_MSR_DCD) ? TIOCM_CAR : 0) | | |
1321 | ((status & UART_MSR_RI) ? TIOCM_RNG : 0) | | |
1322 | ((status & UART_MSR_DSR) ? TIOCM_DSR : 0) | | |
1323 | ((status & UART_MSR_CTS) ? TIOCM_CTS : 0); | |
1324 | } | |
1da177e4 | 1325 | |
1c45607a JS |
1326 | static int mxser_tiocmset(struct tty_struct *tty, struct file *file, |
1327 | unsigned int set, unsigned int clear) | |
1328 | { | |
1329 | struct mxser_port *info = tty->driver_data; | |
1330 | unsigned long flags; | |
1da177e4 | 1331 | |
1da177e4 | 1332 | |
1c45607a JS |
1333 | if (tty->index == MXSER_PORTS) |
1334 | return -ENOIOCTLCMD; | |
1335 | if (test_bit(TTY_IO_ERROR, &tty->flags)) | |
1336 | return -EIO; | |
1da177e4 | 1337 | |
1c45607a | 1338 | spin_lock_irqsave(&info->slock, flags); |
1da177e4 | 1339 | |
1c45607a JS |
1340 | if (set & TIOCM_RTS) |
1341 | info->MCR |= UART_MCR_RTS; | |
1342 | if (set & TIOCM_DTR) | |
1343 | info->MCR |= UART_MCR_DTR; | |
1da177e4 | 1344 | |
1c45607a JS |
1345 | if (clear & TIOCM_RTS) |
1346 | info->MCR &= ~UART_MCR_RTS; | |
1347 | if (clear & TIOCM_DTR) | |
1348 | info->MCR &= ~UART_MCR_DTR; | |
8ea2c2ec | 1349 | |
1c45607a JS |
1350 | outb(info->MCR, info->ioaddr + UART_MCR); |
1351 | spin_unlock_irqrestore(&info->slock, flags); | |
1352 | return 0; | |
1353 | } | |
1da177e4 | 1354 | |
1c45607a JS |
1355 | static int __init mxser_program_mode(int port) |
1356 | { | |
1357 | int id, i, j, n; | |
1358 | ||
1359 | outb(0, port); | |
1360 | outb(0, port); | |
1361 | outb(0, port); | |
1362 | (void)inb(port); | |
1363 | (void)inb(port); | |
1364 | outb(0, port); | |
1365 | (void)inb(port); | |
1366 | ||
1367 | id = inb(port + 1) & 0x1F; | |
1368 | if ((id != C168_ASIC_ID) && | |
1369 | (id != C104_ASIC_ID) && | |
1370 | (id != C102_ASIC_ID) && | |
1371 | (id != CI132_ASIC_ID) && | |
1372 | (id != CI134_ASIC_ID) && | |
1373 | (id != CI104J_ASIC_ID)) | |
1374 | return -1; | |
1375 | for (i = 0, j = 0; i < 4; i++) { | |
1376 | n = inb(port + 2); | |
1377 | if (n == 'M') { | |
1378 | j = 1; | |
1379 | } else if ((j == 1) && (n == 1)) { | |
1380 | j = 2; | |
1381 | break; | |
1382 | } else | |
1383 | j = 0; | |
1da177e4 | 1384 | } |
1c45607a JS |
1385 | if (j != 2) |
1386 | id = -2; | |
1387 | return id; | |
1da177e4 LT |
1388 | } |
1389 | ||
1c45607a JS |
1390 | static void __init mxser_normal_mode(int port) |
1391 | { | |
1392 | int i, n; | |
1393 | ||
1394 | outb(0xA5, port + 1); | |
1395 | outb(0x80, port + 3); | |
1396 | outb(12, port + 0); /* 9600 bps */ | |
1397 | outb(0, port + 1); | |
1398 | outb(0x03, port + 3); /* 8 data bits */ | |
1399 | outb(0x13, port + 4); /* loop back mode */ | |
1400 | for (i = 0; i < 16; i++) { | |
1401 | n = inb(port + 5); | |
1402 | if ((n & 0x61) == 0x60) | |
1403 | break; | |
1404 | if ((n & 1) == 1) | |
1405 | (void)inb(port); | |
1406 | } | |
1407 | outb(0x00, port + 4); | |
1408 | } | |
1409 | ||
1410 | #define CHIP_SK 0x01 /* Serial Data Clock in Eprom */ | |
1411 | #define CHIP_DO 0x02 /* Serial Data Output in Eprom */ | |
1412 | #define CHIP_CS 0x04 /* Serial Chip Select in Eprom */ | |
1413 | #define CHIP_DI 0x08 /* Serial Data Input in Eprom */ | |
1414 | #define EN_CCMD 0x000 /* Chip's command register */ | |
1415 | #define EN0_RSARLO 0x008 /* Remote start address reg 0 */ | |
1416 | #define EN0_RSARHI 0x009 /* Remote start address reg 1 */ | |
1417 | #define EN0_RCNTLO 0x00A /* Remote byte count reg WR */ | |
1418 | #define EN0_RCNTHI 0x00B /* Remote byte count reg WR */ | |
1419 | #define EN0_DCFG 0x00E /* Data configuration reg WR */ | |
1420 | #define EN0_PORT 0x010 /* Rcv missed frame error counter RD */ | |
1421 | #define ENC_PAGE0 0x000 /* Select page 0 of chip registers */ | |
1422 | #define ENC_PAGE3 0x0C0 /* Select page 3 of chip registers */ | |
1423 | static int __init mxser_read_register(int port, unsigned short *regs) | |
1424 | { | |
1425 | int i, k, value, id; | |
1426 | unsigned int j; | |
1427 | ||
1428 | id = mxser_program_mode(port); | |
1429 | if (id < 0) | |
1430 | return id; | |
1431 | for (i = 0; i < 14; i++) { | |
1432 | k = (i & 0x3F) | 0x180; | |
1433 | for (j = 0x100; j > 0; j >>= 1) { | |
1434 | outb(CHIP_CS, port); | |
1435 | if (k & j) { | |
1436 | outb(CHIP_CS | CHIP_DO, port); | |
1437 | outb(CHIP_CS | CHIP_DO | CHIP_SK, port); /* A? bit of read */ | |
1438 | } else { | |
1439 | outb(CHIP_CS, port); | |
1440 | outb(CHIP_CS | CHIP_SK, port); /* A? bit of read */ | |
1441 | } | |
1442 | } | |
1443 | (void)inb(port); | |
1444 | value = 0; | |
1445 | for (k = 0, j = 0x8000; k < 16; k++, j >>= 1) { | |
1446 | outb(CHIP_CS, port); | |
1447 | outb(CHIP_CS | CHIP_SK, port); | |
1448 | if (inb(port) & CHIP_DI) | |
1449 | value |= j; | |
1450 | } | |
1451 | regs[i] = value; | |
1452 | outb(0, port); | |
1453 | } | |
1454 | mxser_normal_mode(port); | |
1455 | return id; | |
1456 | } | |
1da177e4 LT |
1457 | |
1458 | static int mxser_ioctl_special(unsigned int cmd, void __user *argp) | |
1459 | { | |
1c45607a JS |
1460 | struct mxser_port *port; |
1461 | int result, status; | |
1462 | unsigned int i, j; | |
9d6d162d | 1463 | int ret = 0; |
1da177e4 LT |
1464 | |
1465 | switch (cmd) { | |
1da177e4 | 1466 | case MOXA_GET_MAJOR: |
1c45607a | 1467 | return put_user(ttymajor, (int __user *)argp); |
1da177e4 LT |
1468 | |
1469 | case MOXA_CHKPORTENABLE: | |
1470 | result = 0; | |
9d6d162d | 1471 | lock_kernel(); |
1c45607a JS |
1472 | for (i = 0; i < MXSER_BOARDS; i++) |
1473 | for (j = 0; j < MXSER_PORTS_PER_BOARD; j++) | |
1474 | if (mxser_boards[i].ports[j].ioaddr) | |
1475 | result |= (1 << i); | |
9d6d162d | 1476 | unlock_kernel(); |
8ea2c2ec | 1477 | return put_user(result, (unsigned long __user *)argp); |
1da177e4 | 1478 | case MOXA_GETDATACOUNT: |
9d6d162d | 1479 | lock_kernel(); |
1da177e4 | 1480 | if (copy_to_user(argp, &mxvar_log, sizeof(mxvar_log))) |
9d6d162d AC |
1481 | ret = -EFAULT; |
1482 | unlock_kernel(); | |
1483 | return ret; | |
1da177e4 | 1484 | case MOXA_GETMSTATUS: |
9d6d162d | 1485 | lock_kernel(); |
1c45607a JS |
1486 | for (i = 0; i < MXSER_BOARDS; i++) |
1487 | for (j = 0; j < MXSER_PORTS_PER_BOARD; j++) { | |
1488 | port = &mxser_boards[i].ports[j]; | |
1489 | ||
1490 | GMStatus[i].ri = 0; | |
1491 | if (!port->ioaddr) { | |
1492 | GMStatus[i].dcd = 0; | |
1493 | GMStatus[i].dsr = 0; | |
1494 | GMStatus[i].cts = 0; | |
1495 | continue; | |
1496 | } | |
1da177e4 | 1497 | |
1c45607a JS |
1498 | if (!port->tty || !port->tty->termios) |
1499 | GMStatus[i].cflag = | |
1500 | port->normal_termios.c_cflag; | |
1501 | else | |
1502 | GMStatus[i].cflag = | |
1503 | port->tty->termios->c_cflag; | |
1da177e4 | 1504 | |
1c45607a JS |
1505 | status = inb(port->ioaddr + UART_MSR); |
1506 | if (status & 0x80 /*UART_MSR_DCD */ ) | |
1507 | GMStatus[i].dcd = 1; | |
1508 | else | |
1509 | GMStatus[i].dcd = 0; | |
1da177e4 | 1510 | |
1c45607a JS |
1511 | if (status & 0x20 /*UART_MSR_DSR */ ) |
1512 | GMStatus[i].dsr = 1; | |
1513 | else | |
1514 | GMStatus[i].dsr = 0; | |
1da177e4 LT |
1515 | |
1516 | ||
1c45607a JS |
1517 | if (status & 0x10 /*UART_MSR_CTS */ ) |
1518 | GMStatus[i].cts = 1; | |
1519 | else | |
1520 | GMStatus[i].cts = 0; | |
1521 | } | |
9d6d162d | 1522 | unlock_kernel(); |
8ea2c2ec JJ |
1523 | if (copy_to_user(argp, GMStatus, |
1524 | sizeof(struct mxser_mstatus) * MXSER_PORTS)) | |
1da177e4 LT |
1525 | return -EFAULT; |
1526 | return 0; | |
8ea2c2ec | 1527 | case MOXA_ASPP_MON_EXT: { |
1c45607a JS |
1528 | int p, shiftbit; |
1529 | unsigned long opmode; | |
1530 | unsigned cflag, iflag; | |
1531 | ||
9d6d162d AC |
1532 | lock_kernel(); |
1533 | for (i = 0; i < MXSER_BOARDS; i++) { | |
1c45607a JS |
1534 | for (j = 0; j < MXSER_PORTS_PER_BOARD; j++) { |
1535 | port = &mxser_boards[i].ports[j]; | |
1536 | if (!port->ioaddr) | |
1da177e4 LT |
1537 | continue; |
1538 | ||
1c45607a JS |
1539 | status = mxser_get_msr(port->ioaddr, 0, i); |
1540 | ||
1da177e4 | 1541 | if (status & UART_MSR_TERI) |
1c45607a | 1542 | port->icount.rng++; |
1da177e4 | 1543 | if (status & UART_MSR_DDSR) |
1c45607a | 1544 | port->icount.dsr++; |
1da177e4 | 1545 | if (status & UART_MSR_DDCD) |
1c45607a | 1546 | port->icount.dcd++; |
1da177e4 | 1547 | if (status & UART_MSR_DCTS) |
1c45607a JS |
1548 | port->icount.cts++; |
1549 | ||
1550 | port->mon_data.modem_status = status; | |
1551 | mon_data_ext.rx_cnt[i] = port->mon_data.rxcnt; | |
1552 | mon_data_ext.tx_cnt[i] = port->mon_data.txcnt; | |
1553 | mon_data_ext.up_rxcnt[i] = | |
1554 | port->mon_data.up_rxcnt; | |
1555 | mon_data_ext.up_txcnt[i] = | |
1556 | port->mon_data.up_txcnt; | |
1557 | mon_data_ext.modem_status[i] = | |
1558 | port->mon_data.modem_status; | |
1559 | mon_data_ext.baudrate[i] = | |
1560 | tty_get_baud_rate(port->tty); | |
1561 | ||
1562 | if (!port->tty || !port->tty->termios) { | |
1563 | cflag = port->normal_termios.c_cflag; | |
1564 | iflag = port->normal_termios.c_iflag; | |
1da177e4 | 1565 | } else { |
1c45607a JS |
1566 | cflag = port->tty->termios->c_cflag; |
1567 | iflag = port->tty->termios->c_iflag; | |
1da177e4 LT |
1568 | } |
1569 | ||
1570 | mon_data_ext.databits[i] = cflag & CSIZE; | |
1571 | ||
1572 | mon_data_ext.stopbits[i] = cflag & CSTOPB; | |
1573 | ||
1c45607a JS |
1574 | mon_data_ext.parity[i] = |
1575 | cflag & (PARENB | PARODD | CMSPAR); | |
1da177e4 LT |
1576 | |
1577 | mon_data_ext.flowctrl[i] = 0x00; | |
1578 | ||
1579 | if (cflag & CRTSCTS) | |
1580 | mon_data_ext.flowctrl[i] |= 0x03; | |
1581 | ||
1582 | if (iflag & (IXON | IXOFF)) | |
1583 | mon_data_ext.flowctrl[i] |= 0x0C; | |
1584 | ||
1c45607a | 1585 | if (port->type == PORT_16550A) |
1da177e4 LT |
1586 | mon_data_ext.fifo[i] = 1; |
1587 | else | |
1588 | mon_data_ext.fifo[i] = 0; | |
1589 | ||
1590 | p = i % 4; | |
1591 | shiftbit = p * 2; | |
1c45607a | 1592 | opmode = inb(port->opmode_ioaddr) >> shiftbit; |
1da177e4 LT |
1593 | opmode &= OP_MODE_MASK; |
1594 | ||
1595 | mon_data_ext.iftype[i] = opmode; | |
1596 | ||
1597 | } | |
9d6d162d AC |
1598 | } |
1599 | unlock_kernel(); | |
1600 | if (copy_to_user(argp, &mon_data_ext, | |
1601 | sizeof(mon_data_ext))) | |
1602 | return -EFAULT; | |
1603 | return 0; | |
1604 | } | |
1605 | default: | |
1da177e4 LT |
1606 | return -ENOIOCTLCMD; |
1607 | } | |
1608 | return 0; | |
1609 | } | |
1610 | ||
1c45607a JS |
1611 | static int mxser_cflags_changed(struct mxser_port *info, unsigned long arg, |
1612 | struct async_icount *cprev) | |
1da177e4 | 1613 | { |
1c45607a JS |
1614 | struct async_icount cnow; |
1615 | unsigned long flags; | |
1616 | int ret; | |
1da177e4 | 1617 | |
1c45607a JS |
1618 | spin_lock_irqsave(&info->slock, flags); |
1619 | cnow = info->icount; /* atomic copy */ | |
1620 | spin_unlock_irqrestore(&info->slock, flags); | |
1da177e4 | 1621 | |
1c45607a JS |
1622 | ret = ((arg & TIOCM_RNG) && (cnow.rng != cprev->rng)) || |
1623 | ((arg & TIOCM_DSR) && (cnow.dsr != cprev->dsr)) || | |
1624 | ((arg & TIOCM_CD) && (cnow.dcd != cprev->dcd)) || | |
1625 | ((arg & TIOCM_CTS) && (cnow.cts != cprev->cts)); | |
1da177e4 | 1626 | |
1c45607a JS |
1627 | *cprev = cnow; |
1628 | ||
1629 | return ret; | |
1630 | } | |
1631 | ||
1632 | static int mxser_ioctl(struct tty_struct *tty, struct file *file, | |
1633 | unsigned int cmd, unsigned long arg) | |
1da177e4 | 1634 | { |
1c45607a JS |
1635 | struct mxser_port *info = tty->driver_data; |
1636 | struct async_icount cnow; | |
1637 | struct serial_icounter_struct __user *p_cuser; | |
1638 | unsigned long flags; | |
1639 | void __user *argp = (void __user *)arg; | |
1640 | int retval; | |
1da177e4 | 1641 | |
1c45607a JS |
1642 | if (tty->index == MXSER_PORTS) |
1643 | return mxser_ioctl_special(cmd, argp); | |
1da177e4 | 1644 | |
1c45607a JS |
1645 | if (cmd == MOXA_SET_OP_MODE || cmd == MOXA_GET_OP_MODE) { |
1646 | int p; | |
1647 | unsigned long opmode; | |
1648 | static unsigned char ModeMask[] = { 0xfc, 0xf3, 0xcf, 0x3f }; | |
1649 | int shiftbit; | |
1650 | unsigned char val, mask; | |
1da177e4 | 1651 | |
1c45607a JS |
1652 | p = tty->index % 4; |
1653 | if (cmd == MOXA_SET_OP_MODE) { | |
1654 | if (get_user(opmode, (int __user *) argp)) | |
1655 | return -EFAULT; | |
1656 | if (opmode != RS232_MODE && | |
1657 | opmode != RS485_2WIRE_MODE && | |
1658 | opmode != RS422_MODE && | |
1659 | opmode != RS485_4WIRE_MODE) | |
1660 | return -EFAULT; | |
9d6d162d | 1661 | lock_kernel(); |
1c45607a JS |
1662 | mask = ModeMask[p]; |
1663 | shiftbit = p * 2; | |
1664 | val = inb(info->opmode_ioaddr); | |
1665 | val &= mask; | |
1666 | val |= (opmode << shiftbit); | |
1667 | outb(val, info->opmode_ioaddr); | |
9d6d162d | 1668 | unlock_kernel(); |
1c45607a | 1669 | } else { |
9d6d162d | 1670 | lock_kernel(); |
1c45607a JS |
1671 | shiftbit = p * 2; |
1672 | opmode = inb(info->opmode_ioaddr) >> shiftbit; | |
1673 | opmode &= OP_MODE_MASK; | |
9d6d162d | 1674 | unlock_kernel(); |
1c45607a JS |
1675 | if (put_user(opmode, (int __user *)argp)) |
1676 | return -EFAULT; | |
1677 | } | |
1678 | return 0; | |
1679 | } | |
1680 | ||
1681 | if (cmd != TIOCGSERIAL && cmd != TIOCMIWAIT && cmd != TIOCGICOUNT && | |
1682 | test_bit(TTY_IO_ERROR, &tty->flags)) | |
1683 | return -EIO; | |
1684 | ||
1685 | switch (cmd) { | |
1686 | case TCSBRK: /* SVID version: non-zero arg --> no break */ | |
1687 | retval = tty_check_change(tty); | |
1688 | if (retval) | |
1689 | return retval; | |
1690 | tty_wait_until_sent(tty, 0); | |
1691 | if (!arg) | |
1692 | mxser_send_break(info, HZ / 4); /* 1/4 second */ | |
1693 | return 0; | |
1694 | case TCSBRKP: /* support for POSIX tcsendbreak() */ | |
1695 | retval = tty_check_change(tty); | |
1696 | if (retval) | |
1697 | return retval; | |
1698 | tty_wait_until_sent(tty, 0); | |
1699 | mxser_send_break(info, arg ? arg * (HZ / 10) : HZ / 4); | |
1700 | return 0; | |
1c45607a | 1701 | case TIOCGSERIAL: |
9d6d162d AC |
1702 | lock_kernel(); |
1703 | retval = mxser_get_serial_info(info, argp); | |
1704 | unlock_kernel(); | |
1705 | return retval; | |
1c45607a | 1706 | case TIOCSSERIAL: |
9d6d162d AC |
1707 | lock_kernel(); |
1708 | retval = mxser_set_serial_info(info, argp); | |
1709 | unlock_kernel(); | |
1710 | return retval; | |
1c45607a | 1711 | case TIOCSERGETLSR: /* Get line status register */ |
9d6d162d | 1712 | return mxser_get_lsr_info(info, argp); |
1c45607a JS |
1713 | /* |
1714 | * Wait for any of the 4 modem inputs (DCD,RI,DSR,CTS) to change | |
1715 | * - mask passed in arg for lines of interest | |
1716 | * (use |'ed TIOCM_RNG/DSR/CD/CTS for masking) | |
1717 | * Caller should use TIOCGICOUNT to see which one it was | |
1718 | */ | |
1719 | case TIOCMIWAIT: | |
1720 | spin_lock_irqsave(&info->slock, flags); | |
1721 | cnow = info->icount; /* note the counters on entry */ | |
1722 | spin_unlock_irqrestore(&info->slock, flags); | |
1723 | ||
1724 | return wait_event_interruptible(info->delta_msr_wait, | |
1725 | mxser_cflags_changed(info, arg, &cnow)); | |
1726 | /* | |
1727 | * Get counter of input serial line interrupts (DCD,RI,DSR,CTS) | |
1728 | * Return: write counters to the user passed counter struct | |
1729 | * NB: both 1->0 and 0->1 transitions are counted except for | |
1730 | * RI where only 0->1 is counted. | |
1731 | */ | |
1732 | case TIOCGICOUNT: | |
1733 | spin_lock_irqsave(&info->slock, flags); | |
1734 | cnow = info->icount; | |
1735 | spin_unlock_irqrestore(&info->slock, flags); | |
1736 | p_cuser = argp; | |
1737 | if (put_user(cnow.frame, &p_cuser->frame)) | |
1738 | return -EFAULT; | |
1739 | if (put_user(cnow.brk, &p_cuser->brk)) | |
1740 | return -EFAULT; | |
1741 | if (put_user(cnow.overrun, &p_cuser->overrun)) | |
1742 | return -EFAULT; | |
1743 | if (put_user(cnow.buf_overrun, &p_cuser->buf_overrun)) | |
1744 | return -EFAULT; | |
1745 | if (put_user(cnow.parity, &p_cuser->parity)) | |
1746 | return -EFAULT; | |
1747 | if (put_user(cnow.rx, &p_cuser->rx)) | |
1748 | return -EFAULT; | |
1749 | if (put_user(cnow.tx, &p_cuser->tx)) | |
1750 | return -EFAULT; | |
1751 | put_user(cnow.cts, &p_cuser->cts); | |
1752 | put_user(cnow.dsr, &p_cuser->dsr); | |
1753 | put_user(cnow.rng, &p_cuser->rng); | |
1754 | put_user(cnow.dcd, &p_cuser->dcd); | |
1755 | return 0; | |
1756 | case MOXA_HighSpeedOn: | |
1757 | return put_user(info->baud_base != 115200 ? 1 : 0, (int __user *)argp); | |
1758 | case MOXA_SDS_RSTICOUNTER: | |
9d6d162d | 1759 | lock_kernel(); |
1c45607a JS |
1760 | info->mon_data.rxcnt = 0; |
1761 | info->mon_data.txcnt = 0; | |
9d6d162d | 1762 | unlock_kernel(); |
1c45607a JS |
1763 | return 0; |
1764 | ||
1765 | case MOXA_ASPP_OQUEUE:{ | |
1766 | int len, lsr; | |
1767 | ||
9d6d162d | 1768 | lock_kernel(); |
1c45607a | 1769 | len = mxser_chars_in_buffer(tty); |
1c45607a | 1770 | lsr = inb(info->ioaddr + UART_LSR) & UART_LSR_TEMT; |
1c45607a | 1771 | len += (lsr ? 0 : 1); |
9d6d162d | 1772 | unlock_kernel(); |
1c45607a JS |
1773 | |
1774 | return put_user(len, (int __user *)argp); | |
1775 | } | |
1776 | case MOXA_ASPP_MON: { | |
1777 | int mcr, status; | |
1778 | ||
9d6d162d | 1779 | lock_kernel(); |
1c45607a JS |
1780 | status = mxser_get_msr(info->ioaddr, 1, tty->index); |
1781 | mxser_check_modem_status(info, status); | |
1782 | ||
1783 | mcr = inb(info->ioaddr + UART_MCR); | |
1784 | if (mcr & MOXA_MUST_MCR_XON_FLAG) | |
1785 | info->mon_data.hold_reason &= ~NPPI_NOTIFY_XOFFHOLD; | |
1786 | else | |
1787 | info->mon_data.hold_reason |= NPPI_NOTIFY_XOFFHOLD; | |
1788 | ||
1789 | if (mcr & MOXA_MUST_MCR_TX_XON) | |
1790 | info->mon_data.hold_reason &= ~NPPI_NOTIFY_XOFFXENT; | |
1791 | else | |
1792 | info->mon_data.hold_reason |= NPPI_NOTIFY_XOFFXENT; | |
1793 | ||
1794 | if (info->tty->hw_stopped) | |
1795 | info->mon_data.hold_reason |= NPPI_NOTIFY_CTSHOLD; | |
1796 | else | |
1797 | info->mon_data.hold_reason &= ~NPPI_NOTIFY_CTSHOLD; | |
9d6d162d | 1798 | unlock_kernel(); |
1c45607a JS |
1799 | if (copy_to_user(argp, &info->mon_data, |
1800 | sizeof(struct mxser_mon))) | |
1801 | return -EFAULT; | |
1802 | ||
1803 | return 0; | |
1804 | } | |
1805 | case MOXA_ASPP_LSTATUS: { | |
1806 | if (put_user(info->err_shadow, (unsigned char __user *)argp)) | |
1807 | return -EFAULT; | |
1808 | ||
1809 | info->err_shadow = 0; | |
1810 | return 0; | |
1811 | } | |
1812 | case MOXA_SET_BAUD_METHOD: { | |
1813 | int method; | |
1814 | ||
1815 | if (get_user(method, (int __user *)argp)) | |
1816 | return -EFAULT; | |
1817 | mxser_set_baud_method[tty->index] = method; | |
1818 | return put_user(method, (int __user *)argp); | |
1819 | } | |
1820 | default: | |
1821 | return -ENOIOCTLCMD; | |
1822 | } | |
1823 | return 0; | |
1824 | } | |
1825 | ||
1826 | static void mxser_stoprx(struct tty_struct *tty) | |
1827 | { | |
1828 | struct mxser_port *info = tty->driver_data; | |
1829 | ||
1830 | info->ldisc_stop_rx = 1; | |
1831 | if (I_IXOFF(tty)) { | |
1832 | if (info->board->chip_flag) { | |
1833 | info->IER &= ~MOXA_MUST_RECV_ISR; | |
1834 | outb(info->IER, info->ioaddr + UART_IER); | |
1835 | } else { | |
1836 | info->x_char = STOP_CHAR(tty); | |
1837 | outb(0, info->ioaddr + UART_IER); | |
1838 | info->IER |= UART_IER_THRI; | |
1839 | outb(info->IER, info->ioaddr + UART_IER); | |
1da177e4 LT |
1840 | } |
1841 | } | |
1842 | ||
1843 | if (info->tty->termios->c_cflag & CRTSCTS) { | |
1c45607a JS |
1844 | info->MCR &= ~UART_MCR_RTS; |
1845 | outb(info->MCR, info->ioaddr + UART_MCR); | |
1da177e4 LT |
1846 | } |
1847 | } | |
1848 | ||
1849 | /* | |
1850 | * This routine is called by the upper-layer tty layer to signal that | |
1851 | * incoming characters should be throttled. | |
1852 | */ | |
1853 | static void mxser_throttle(struct tty_struct *tty) | |
1854 | { | |
1da177e4 | 1855 | mxser_stoprx(tty); |
1da177e4 LT |
1856 | } |
1857 | ||
1858 | static void mxser_unthrottle(struct tty_struct *tty) | |
1859 | { | |
1c45607a | 1860 | struct mxser_port *info = tty->driver_data; |
1da177e4 | 1861 | |
1c45607a JS |
1862 | /* startrx */ |
1863 | info->ldisc_stop_rx = 0; | |
1864 | if (I_IXOFF(tty)) { | |
1865 | if (info->x_char) | |
1866 | info->x_char = 0; | |
1867 | else { | |
1868 | if (info->board->chip_flag) { | |
1869 | info->IER |= MOXA_MUST_RECV_ISR; | |
1870 | outb(info->IER, info->ioaddr + UART_IER); | |
1871 | } else { | |
1872 | info->x_char = START_CHAR(tty); | |
1873 | outb(0, info->ioaddr + UART_IER); | |
1874 | info->IER |= UART_IER_THRI; | |
1875 | outb(info->IER, info->ioaddr + UART_IER); | |
1876 | } | |
1da177e4 | 1877 | } |
1c45607a | 1878 | } |
1da177e4 | 1879 | |
1c45607a JS |
1880 | if (info->tty->termios->c_cflag & CRTSCTS) { |
1881 | info->MCR |= UART_MCR_RTS; | |
1882 | outb(info->MCR, info->ioaddr + UART_MCR); | |
1da177e4 LT |
1883 | } |
1884 | } | |
1885 | ||
1886 | /* | |
1887 | * mxser_stop() and mxser_start() | |
1888 | * | |
1889 | * This routines are called before setting or resetting tty->stopped. | |
1890 | * They enable or disable transmitter interrupts, as necessary. | |
1891 | */ | |
1892 | static void mxser_stop(struct tty_struct *tty) | |
1893 | { | |
1c45607a | 1894 | struct mxser_port *info = tty->driver_data; |
1da177e4 LT |
1895 | unsigned long flags; |
1896 | ||
1897 | spin_lock_irqsave(&info->slock, flags); | |
1898 | if (info->IER & UART_IER_THRI) { | |
1899 | info->IER &= ~UART_IER_THRI; | |
1c45607a | 1900 | outb(info->IER, info->ioaddr + UART_IER); |
1da177e4 LT |
1901 | } |
1902 | spin_unlock_irqrestore(&info->slock, flags); | |
1903 | } | |
1904 | ||
1905 | static void mxser_start(struct tty_struct *tty) | |
1906 | { | |
1c45607a | 1907 | struct mxser_port *info = tty->driver_data; |
1da177e4 LT |
1908 | unsigned long flags; |
1909 | ||
1910 | spin_lock_irqsave(&info->slock, flags); | |
1c45607a JS |
1911 | if (info->xmit_cnt && info->xmit_buf) { |
1912 | outb(info->IER & ~UART_IER_THRI, info->ioaddr + UART_IER); | |
1da177e4 | 1913 | info->IER |= UART_IER_THRI; |
1c45607a | 1914 | outb(info->IER, info->ioaddr + UART_IER); |
1da177e4 LT |
1915 | } |
1916 | spin_unlock_irqrestore(&info->slock, flags); | |
1917 | } | |
1918 | ||
1c45607a JS |
1919 | static void mxser_set_termios(struct tty_struct *tty, struct ktermios *old_termios) |
1920 | { | |
1921 | struct mxser_port *info = tty->driver_data; | |
1922 | unsigned long flags; | |
1923 | ||
1924 | spin_lock_irqsave(&info->slock, flags); | |
1925 | mxser_change_speed(info, old_termios); | |
1926 | spin_unlock_irqrestore(&info->slock, flags); | |
1927 | ||
1928 | if ((old_termios->c_cflag & CRTSCTS) && | |
1929 | !(tty->termios->c_cflag & CRTSCTS)) { | |
1930 | tty->hw_stopped = 0; | |
1931 | mxser_start(tty); | |
1932 | } | |
1933 | ||
1934 | /* Handle sw stopped */ | |
1935 | if ((old_termios->c_iflag & IXON) && | |
1936 | !(tty->termios->c_iflag & IXON)) { | |
1937 | tty->stopped = 0; | |
1938 | ||
1939 | if (info->board->chip_flag) { | |
1940 | spin_lock_irqsave(&info->slock, flags); | |
1941 | DISABLE_MOXA_MUST_RX_SOFTWARE_FLOW_CONTROL(info->ioaddr); | |
1942 | spin_unlock_irqrestore(&info->slock, flags); | |
1943 | } | |
1944 | ||
1945 | mxser_start(tty); | |
1946 | } | |
1947 | } | |
1948 | ||
1da177e4 LT |
1949 | /* |
1950 | * mxser_wait_until_sent() --- wait until the transmitter is empty | |
1951 | */ | |
1952 | static void mxser_wait_until_sent(struct tty_struct *tty, int timeout) | |
1953 | { | |
1c45607a | 1954 | struct mxser_port *info = tty->driver_data; |
1da177e4 LT |
1955 | unsigned long orig_jiffies, char_time; |
1956 | int lsr; | |
1957 | ||
1958 | if (info->type == PORT_UNKNOWN) | |
1959 | return; | |
1960 | ||
1961 | if (info->xmit_fifo_size == 0) | |
1962 | return; /* Just in case.... */ | |
1963 | ||
1964 | orig_jiffies = jiffies; | |
1965 | /* | |
1966 | * Set the check interval to be 1/5 of the estimated time to | |
1967 | * send a single character, and make it at least 1. The check | |
1968 | * interval should also be less than the timeout. | |
1969 | * | |
1970 | * Note: we have to use pretty tight timings here to satisfy | |
1971 | * the NIST-PCTS. | |
1972 | */ | |
1973 | char_time = (info->timeout - HZ / 50) / info->xmit_fifo_size; | |
1974 | char_time = char_time / 5; | |
1975 | if (char_time == 0) | |
1976 | char_time = 1; | |
1977 | if (timeout && timeout < char_time) | |
1978 | char_time = timeout; | |
1979 | /* | |
1980 | * If the transmitter hasn't cleared in twice the approximate | |
1981 | * amount of time to send the entire FIFO, it probably won't | |
1982 | * ever clear. This assumes the UART isn't doing flow | |
1983 | * control, which is currently the case. Hence, if it ever | |
1984 | * takes longer than info->timeout, this is probably due to a | |
1985 | * UART bug of some kind. So, we clamp the timeout parameter at | |
1986 | * 2*info->timeout. | |
1987 | */ | |
1988 | if (!timeout || timeout > 2 * info->timeout) | |
1989 | timeout = 2 * info->timeout; | |
1990 | #ifdef SERIAL_DEBUG_RS_WAIT_UNTIL_SENT | |
8ea2c2ec JJ |
1991 | printk(KERN_DEBUG "In rs_wait_until_sent(%d) check=%lu...", |
1992 | timeout, char_time); | |
1da177e4 LT |
1993 | printk("jiff=%lu...", jiffies); |
1994 | #endif | |
1c45607a | 1995 | while (!((lsr = inb(info->ioaddr + UART_LSR)) & UART_LSR_TEMT)) { |
1da177e4 LT |
1996 | #ifdef SERIAL_DEBUG_RS_WAIT_UNTIL_SENT |
1997 | printk("lsr = %d (jiff=%lu)...", lsr, jiffies); | |
1998 | #endif | |
da4cd8df | 1999 | schedule_timeout_interruptible(char_time); |
1da177e4 | 2000 | if (signal_pending(current)) |
1c45607a JS |
2001 | break; |
2002 | if (timeout && time_after(jiffies, orig_jiffies + timeout)) | |
2003 | break; | |
1da177e4 | 2004 | } |
1c45607a | 2005 | set_current_state(TASK_RUNNING); |
1da177e4 | 2006 | |
1c45607a JS |
2007 | #ifdef SERIAL_DEBUG_RS_WAIT_UNTIL_SENT |
2008 | printk("lsr = %d (jiff=%lu)...done\n", lsr, jiffies); | |
2009 | #endif | |
2010 | } | |
1da177e4 | 2011 | |
1c45607a JS |
2012 | /* |
2013 | * This routine is called by tty_hangup() when a hangup is signaled. | |
2014 | */ | |
2015 | static void mxser_hangup(struct tty_struct *tty) | |
2016 | { | |
2017 | struct mxser_port *info = tty->driver_data; | |
1da177e4 | 2018 | |
1c45607a JS |
2019 | mxser_flush_buffer(tty); |
2020 | mxser_shutdown(info); | |
2021 | info->event = 0; | |
2022 | info->count = 0; | |
2023 | info->flags &= ~ASYNC_NORMAL_ACTIVE; | |
2024 | info->tty = NULL; | |
2025 | wake_up_interruptible(&info->open_wait); | |
1da177e4 LT |
2026 | } |
2027 | ||
1c45607a JS |
2028 | /* |
2029 | * mxser_rs_break() --- routine which turns the break handling on or off | |
2030 | */ | |
2031 | static void mxser_rs_break(struct tty_struct *tty, int break_state) | |
1da177e4 | 2032 | { |
1c45607a | 2033 | struct mxser_port *info = tty->driver_data; |
1da177e4 LT |
2034 | unsigned long flags; |
2035 | ||
1c45607a JS |
2036 | spin_lock_irqsave(&info->slock, flags); |
2037 | if (break_state == -1) | |
2038 | outb(inb(info->ioaddr + UART_LCR) | UART_LCR_SBC, | |
2039 | info->ioaddr + UART_LCR); | |
2040 | else | |
2041 | outb(inb(info->ioaddr + UART_LCR) & ~UART_LCR_SBC, | |
2042 | info->ioaddr + UART_LCR); | |
2043 | spin_unlock_irqrestore(&info->slock, flags); | |
2044 | } | |
1da177e4 | 2045 | |
1c45607a JS |
2046 | static void mxser_receive_chars(struct mxser_port *port, int *status) |
2047 | { | |
2048 | struct tty_struct *tty = port->tty; | |
2049 | unsigned char ch, gdl; | |
2050 | int ignored = 0; | |
2051 | int cnt = 0; | |
2052 | int recv_room; | |
2053 | int max = 256; | |
1da177e4 | 2054 | |
1c45607a JS |
2055 | recv_room = tty->receive_room; |
2056 | if ((recv_room == 0) && (!port->ldisc_stop_rx)) | |
2057 | mxser_stoprx(tty); | |
1da177e4 | 2058 | |
1c45607a | 2059 | if (port->board->chip_flag != MOXA_OTHER_UART) { |
1da177e4 | 2060 | |
1c45607a JS |
2061 | if (*status & UART_LSR_SPECIAL) |
2062 | goto intr_old; | |
2063 | if (port->board->chip_flag == MOXA_MUST_MU860_HWID && | |
2064 | (*status & MOXA_MUST_LSR_RERR)) | |
2065 | goto intr_old; | |
2066 | if (*status & MOXA_MUST_LSR_RERR) | |
2067 | goto intr_old; | |
1da177e4 | 2068 | |
1c45607a JS |
2069 | gdl = inb(port->ioaddr + MOXA_MUST_GDL_REGISTER); |
2070 | ||
2071 | if (port->board->chip_flag == MOXA_MUST_MU150_HWID) | |
2072 | gdl &= MOXA_MUST_GDL_MASK; | |
2073 | if (gdl >= recv_room) { | |
2074 | if (!port->ldisc_stop_rx) | |
2075 | mxser_stoprx(tty); | |
2076 | } | |
2077 | while (gdl--) { | |
2078 | ch = inb(port->ioaddr + UART_RX); | |
2079 | tty_insert_flip_char(tty, ch, 0); | |
2080 | cnt++; | |
2081 | } | |
2082 | goto end_intr; | |
1da177e4 | 2083 | } |
1c45607a JS |
2084 | intr_old: |
2085 | ||
2086 | do { | |
2087 | if (max-- < 0) | |
2088 | break; | |
1da177e4 | 2089 | |
1c45607a JS |
2090 | ch = inb(port->ioaddr + UART_RX); |
2091 | if (port->board->chip_flag && (*status & UART_LSR_OE)) | |
2092 | outb(0x23, port->ioaddr + UART_FCR); | |
2093 | *status &= port->read_status_mask; | |
2094 | if (*status & port->ignore_status_mask) { | |
2095 | if (++ignored > 100) | |
2096 | break; | |
2097 | } else { | |
2098 | char flag = 0; | |
2099 | if (*status & UART_LSR_SPECIAL) { | |
2100 | if (*status & UART_LSR_BI) { | |
2101 | flag = TTY_BREAK; | |
2102 | port->icount.brk++; | |
1da177e4 | 2103 | |
1c45607a JS |
2104 | if (port->flags & ASYNC_SAK) |
2105 | do_SAK(tty); | |
2106 | } else if (*status & UART_LSR_PE) { | |
2107 | flag = TTY_PARITY; | |
2108 | port->icount.parity++; | |
2109 | } else if (*status & UART_LSR_FE) { | |
2110 | flag = TTY_FRAME; | |
2111 | port->icount.frame++; | |
2112 | } else if (*status & UART_LSR_OE) { | |
2113 | flag = TTY_OVERRUN; | |
2114 | port->icount.overrun++; | |
2115 | } else | |
2116 | flag = TTY_BREAK; | |
2117 | } | |
2118 | tty_insert_flip_char(tty, ch, flag); | |
2119 | cnt++; | |
2120 | if (cnt >= recv_room) { | |
2121 | if (!port->ldisc_stop_rx) | |
2122 | mxser_stoprx(tty); | |
2123 | break; | |
2124 | } | |
1da177e4 | 2125 | |
1c45607a | 2126 | } |
1da177e4 | 2127 | |
1c45607a JS |
2128 | if (port->board->chip_flag) |
2129 | break; | |
1da177e4 | 2130 | |
1c45607a JS |
2131 | *status = inb(port->ioaddr + UART_LSR); |
2132 | } while (*status & UART_LSR_DR); | |
1da177e4 | 2133 | |
1c45607a JS |
2134 | end_intr: |
2135 | mxvar_log.rxcnt[port->tty->index] += cnt; | |
2136 | port->mon_data.rxcnt += cnt; | |
2137 | port->mon_data.up_rxcnt += cnt; | |
1da177e4 | 2138 | |
1c45607a JS |
2139 | /* |
2140 | * We are called from an interrupt context with &port->slock | |
2141 | * being held. Drop it temporarily in order to prevent | |
2142 | * recursive locking. | |
2143 | */ | |
2144 | spin_unlock(&port->slock); | |
2145 | tty_flip_buffer_push(tty); | |
2146 | spin_lock(&port->slock); | |
1da177e4 LT |
2147 | } |
2148 | ||
1c45607a | 2149 | static void mxser_transmit_chars(struct mxser_port *port) |
1da177e4 | 2150 | { |
1c45607a | 2151 | int count, cnt; |
1da177e4 | 2152 | |
1c45607a JS |
2153 | if (port->x_char) { |
2154 | outb(port->x_char, port->ioaddr + UART_TX); | |
2155 | port->x_char = 0; | |
2156 | mxvar_log.txcnt[port->tty->index]++; | |
2157 | port->mon_data.txcnt++; | |
2158 | port->mon_data.up_txcnt++; | |
2159 | port->icount.tx++; | |
2160 | return; | |
2161 | } | |
1da177e4 | 2162 | |
1c45607a JS |
2163 | if (port->xmit_buf == NULL) |
2164 | return; | |
1da177e4 | 2165 | |
1c45607a JS |
2166 | if ((port->xmit_cnt <= 0) || port->tty->stopped || |
2167 | (port->tty->hw_stopped && | |
2168 | (port->type != PORT_16550A) && | |
2169 | (!port->board->chip_flag))) { | |
2170 | port->IER &= ~UART_IER_THRI; | |
2171 | outb(port->IER, port->ioaddr + UART_IER); | |
2172 | return; | |
1da177e4 LT |
2173 | } |
2174 | ||
1c45607a JS |
2175 | cnt = port->xmit_cnt; |
2176 | count = port->xmit_fifo_size; | |
2177 | do { | |
2178 | outb(port->xmit_buf[port->xmit_tail++], | |
2179 | port->ioaddr + UART_TX); | |
2180 | port->xmit_tail = port->xmit_tail & (SERIAL_XMIT_SIZE - 1); | |
2181 | if (--port->xmit_cnt <= 0) | |
2182 | break; | |
2183 | } while (--count > 0); | |
2184 | mxvar_log.txcnt[port->tty->index] += (cnt - port->xmit_cnt); | |
1da177e4 | 2185 | |
1c45607a JS |
2186 | port->mon_data.txcnt += (cnt - port->xmit_cnt); |
2187 | port->mon_data.up_txcnt += (cnt - port->xmit_cnt); | |
2188 | port->icount.tx += (cnt - port->xmit_cnt); | |
1da177e4 | 2189 | |
1c45607a JS |
2190 | if (port->xmit_cnt < WAKEUP_CHARS) |
2191 | tty_wakeup(port->tty); | |
2192 | ||
2193 | if (port->xmit_cnt <= 0) { | |
2194 | port->IER &= ~UART_IER_THRI; | |
2195 | outb(port->IER, port->ioaddr + UART_IER); | |
1da177e4 | 2196 | } |
1da177e4 LT |
2197 | } |
2198 | ||
2199 | /* | |
1c45607a | 2200 | * This is the serial driver's generic interrupt routine |
1da177e4 | 2201 | */ |
1c45607a | 2202 | static irqreturn_t mxser_interrupt(int irq, void *dev_id) |
1da177e4 | 2203 | { |
1c45607a JS |
2204 | int status, iir, i; |
2205 | struct mxser_board *brd = NULL; | |
2206 | struct mxser_port *port; | |
2207 | int max, irqbits, bits, msr; | |
2208 | unsigned int int_cnt, pass_counter = 0; | |
2209 | int handled = IRQ_NONE; | |
1da177e4 | 2210 | |
1c45607a JS |
2211 | for (i = 0; i < MXSER_BOARDS; i++) |
2212 | if (dev_id == &mxser_boards[i]) { | |
2213 | brd = dev_id; | |
2214 | break; | |
2215 | } | |
1da177e4 | 2216 | |
1c45607a JS |
2217 | if (i == MXSER_BOARDS) |
2218 | goto irq_stop; | |
2219 | if (brd == NULL) | |
2220 | goto irq_stop; | |
2221 | max = brd->info->nports; | |
2222 | while (pass_counter++ < MXSER_ISR_PASS_LIMIT) { | |
2223 | irqbits = inb(brd->vector) & brd->vector_mask; | |
2224 | if (irqbits == brd->vector_mask) | |
2225 | break; | |
1da177e4 | 2226 | |
1c45607a JS |
2227 | handled = IRQ_HANDLED; |
2228 | for (i = 0, bits = 1; i < max; i++, irqbits |= bits, bits <<= 1) { | |
2229 | if (irqbits == brd->vector_mask) | |
2230 | break; | |
2231 | if (bits & irqbits) | |
2232 | continue; | |
2233 | port = &brd->ports[i]; | |
2234 | ||
2235 | int_cnt = 0; | |
2236 | spin_lock(&port->slock); | |
2237 | do { | |
2238 | iir = inb(port->ioaddr + UART_IIR); | |
2239 | if (iir & UART_IIR_NO_INT) | |
2240 | break; | |
2241 | iir &= MOXA_MUST_IIR_MASK; | |
2242 | if (!port->tty || | |
2243 | (port->flags & ASYNC_CLOSING) || | |
2244 | !(port->flags & | |
2245 | ASYNC_INITIALIZED)) { | |
2246 | status = inb(port->ioaddr + UART_LSR); | |
2247 | outb(0x27, port->ioaddr + UART_FCR); | |
2248 | inb(port->ioaddr + UART_MSR); | |
2249 | break; | |
2250 | } | |
1da177e4 | 2251 | |
1c45607a JS |
2252 | status = inb(port->ioaddr + UART_LSR); |
2253 | ||
2254 | if (status & UART_LSR_PE) | |
2255 | port->err_shadow |= NPPI_NOTIFY_PARITY; | |
2256 | if (status & UART_LSR_FE) | |
2257 | port->err_shadow |= NPPI_NOTIFY_FRAMING; | |
2258 | if (status & UART_LSR_OE) | |
2259 | port->err_shadow |= | |
2260 | NPPI_NOTIFY_HW_OVERRUN; | |
2261 | if (status & UART_LSR_BI) | |
2262 | port->err_shadow |= NPPI_NOTIFY_BREAK; | |
2263 | ||
2264 | if (port->board->chip_flag) { | |
2265 | if (iir == MOXA_MUST_IIR_GDA || | |
2266 | iir == MOXA_MUST_IIR_RDA || | |
2267 | iir == MOXA_MUST_IIR_RTO || | |
2268 | iir == MOXA_MUST_IIR_LSR) | |
2269 | mxser_receive_chars(port, | |
2270 | &status); | |
2271 | ||
2272 | } else { | |
2273 | status &= port->read_status_mask; | |
2274 | if (status & UART_LSR_DR) | |
2275 | mxser_receive_chars(port, | |
2276 | &status); | |
2277 | } | |
2278 | msr = inb(port->ioaddr + UART_MSR); | |
2279 | if (msr & UART_MSR_ANY_DELTA) | |
2280 | mxser_check_modem_status(port, msr); | |
2281 | ||
2282 | if (port->board->chip_flag) { | |
2283 | if (iir == 0x02 && (status & | |
2284 | UART_LSR_THRE)) | |
2285 | mxser_transmit_chars(port); | |
2286 | } else { | |
2287 | if (status & UART_LSR_THRE) | |
2288 | mxser_transmit_chars(port); | |
2289 | } | |
2290 | } while (int_cnt++ < MXSER_ISR_PASS_LIMIT); | |
2291 | spin_unlock(&port->slock); | |
2292 | } | |
2293 | } | |
1da177e4 | 2294 | |
1c45607a JS |
2295 | irq_stop: |
2296 | return handled; | |
2297 | } | |
1da177e4 | 2298 | |
1c45607a JS |
2299 | static const struct tty_operations mxser_ops = { |
2300 | .open = mxser_open, | |
2301 | .close = mxser_close, | |
2302 | .write = mxser_write, | |
2303 | .put_char = mxser_put_char, | |
2304 | .flush_chars = mxser_flush_chars, | |
2305 | .write_room = mxser_write_room, | |
2306 | .chars_in_buffer = mxser_chars_in_buffer, | |
2307 | .flush_buffer = mxser_flush_buffer, | |
2308 | .ioctl = mxser_ioctl, | |
2309 | .throttle = mxser_throttle, | |
2310 | .unthrottle = mxser_unthrottle, | |
2311 | .set_termios = mxser_set_termios, | |
2312 | .stop = mxser_stop, | |
2313 | .start = mxser_start, | |
2314 | .hangup = mxser_hangup, | |
2315 | .break_ctl = mxser_rs_break, | |
2316 | .wait_until_sent = mxser_wait_until_sent, | |
2317 | .tiocmget = mxser_tiocmget, | |
2318 | .tiocmset = mxser_tiocmset, | |
2319 | }; | |
1da177e4 | 2320 | |
1c45607a JS |
2321 | /* |
2322 | * The MOXA Smartio/Industio serial driver boot-time initialization code! | |
2323 | */ | |
1da177e4 | 2324 | |
1c45607a JS |
2325 | static void mxser_release_res(struct mxser_board *brd, struct pci_dev *pdev, |
2326 | unsigned int irq) | |
2327 | { | |
2328 | if (irq) | |
2329 | free_irq(brd->irq, brd); | |
2330 | if (pdev != NULL) { /* PCI */ | |
2331 | #ifdef CONFIG_PCI | |
2332 | pci_release_region(pdev, 2); | |
2333 | pci_release_region(pdev, 3); | |
2334 | #endif | |
2335 | } else { | |
2336 | release_region(brd->ports[0].ioaddr, 8 * brd->info->nports); | |
2337 | release_region(brd->vector, 1); | |
2338 | } | |
1da177e4 LT |
2339 | } |
2340 | ||
1c45607a JS |
2341 | static int __devinit mxser_initbrd(struct mxser_board *brd, |
2342 | struct pci_dev *pdev) | |
1da177e4 | 2343 | { |
1c45607a JS |
2344 | struct mxser_port *info; |
2345 | unsigned int i; | |
2346 | int retval; | |
1da177e4 | 2347 | |
1c45607a | 2348 | printk(KERN_INFO "max. baud rate = %d bps.\n", brd->ports[0].max_baud); |
1da177e4 | 2349 | |
1c45607a JS |
2350 | for (i = 0; i < brd->info->nports; i++) { |
2351 | info = &brd->ports[i]; | |
2352 | info->board = brd; | |
2353 | info->stop_rx = 0; | |
2354 | info->ldisc_stop_rx = 0; | |
1da177e4 | 2355 | |
1c45607a JS |
2356 | /* Enhance mode enabled here */ |
2357 | if (brd->chip_flag != MOXA_OTHER_UART) | |
2358 | ENABLE_MOXA_MUST_ENCHANCE_MODE(info->ioaddr); | |
1da177e4 | 2359 | |
1c45607a JS |
2360 | info->flags = ASYNC_SHARE_IRQ; |
2361 | info->type = brd->uart_type; | |
1da177e4 | 2362 | |
1c45607a | 2363 | process_txrx_fifo(info); |
1da177e4 | 2364 | |
1c45607a JS |
2365 | info->custom_divisor = info->baud_base * 16; |
2366 | info->close_delay = 5 * HZ / 10; | |
2367 | info->closing_wait = 30 * HZ; | |
2368 | info->normal_termios = mxvar_sdriver->init_termios; | |
2369 | init_waitqueue_head(&info->open_wait); | |
2370 | init_waitqueue_head(&info->delta_msr_wait); | |
2371 | memset(&info->mon_data, 0, sizeof(struct mxser_mon)); | |
2372 | info->err_shadow = 0; | |
2373 | spin_lock_init(&info->slock); | |
1da177e4 | 2374 | |
1c45607a JS |
2375 | /* before set INT ISR, disable all int */ |
2376 | outb(inb(info->ioaddr + UART_IER) & 0xf0, | |
2377 | info->ioaddr + UART_IER); | |
2378 | } | |
1da177e4 | 2379 | |
1c45607a JS |
2380 | retval = request_irq(brd->irq, mxser_interrupt, IRQF_SHARED, "mxser", |
2381 | brd); | |
2382 | if (retval) { | |
2383 | printk(KERN_ERR "Board %s: Request irq failed, IRQ (%d) may " | |
2384 | "conflict with another device.\n", | |
2385 | brd->info->name, brd->irq); | |
2386 | /* We hold resources, we need to release them. */ | |
2387 | mxser_release_res(brd, pdev, 0); | |
2388 | } | |
2389 | return retval; | |
2390 | } | |
1da177e4 | 2391 | |
1c45607a | 2392 | static int __init mxser_get_ISA_conf(int cap, struct mxser_board *brd) |
1da177e4 LT |
2393 | { |
2394 | int id, i, bits; | |
2395 | unsigned short regs[16], irq; | |
2396 | unsigned char scratch, scratch2; | |
2397 | ||
1c45607a | 2398 | brd->chip_flag = MOXA_OTHER_UART; |
1da177e4 LT |
2399 | |
2400 | id = mxser_read_register(cap, regs); | |
1c45607a JS |
2401 | switch (id) { |
2402 | case C168_ASIC_ID: | |
2403 | brd->info = &mxser_cards[0]; | |
2404 | break; | |
2405 | case C104_ASIC_ID: | |
2406 | brd->info = &mxser_cards[1]; | |
2407 | break; | |
2408 | case CI104J_ASIC_ID: | |
2409 | brd->info = &mxser_cards[2]; | |
2410 | break; | |
2411 | case C102_ASIC_ID: | |
2412 | brd->info = &mxser_cards[5]; | |
2413 | break; | |
2414 | case CI132_ASIC_ID: | |
2415 | brd->info = &mxser_cards[6]; | |
2416 | break; | |
2417 | case CI134_ASIC_ID: | |
2418 | brd->info = &mxser_cards[7]; | |
2419 | break; | |
2420 | default: | |
8ea2c2ec | 2421 | return 0; |
1c45607a | 2422 | } |
1da177e4 LT |
2423 | |
2424 | irq = 0; | |
1c45607a JS |
2425 | /* some ISA cards have 2 ports, but we want to see them as 4-port (why?) |
2426 | Flag-hack checks if configuration should be read as 2-port here. */ | |
2427 | if (brd->info->nports == 2 || (brd->info->flags & MXSER_HAS2)) { | |
1da177e4 LT |
2428 | irq = regs[9] & 0xF000; |
2429 | irq = irq | (irq >> 4); | |
2430 | if (irq != (regs[9] & 0xFF00)) | |
8ea2c2ec | 2431 | return MXSER_ERR_IRQ_CONFLIT; |
1c45607a | 2432 | } else if (brd->info->nports == 4) { |
1da177e4 LT |
2433 | irq = regs[9] & 0xF000; |
2434 | irq = irq | (irq >> 4); | |
2435 | irq = irq | (irq >> 8); | |
2436 | if (irq != regs[9]) | |
8ea2c2ec | 2437 | return MXSER_ERR_IRQ_CONFLIT; |
1c45607a | 2438 | } else if (brd->info->nports == 8) { |
1da177e4 LT |
2439 | irq = regs[9] & 0xF000; |
2440 | irq = irq | (irq >> 4); | |
2441 | irq = irq | (irq >> 8); | |
2442 | if ((irq != regs[9]) || (irq != regs[10])) | |
8ea2c2ec | 2443 | return MXSER_ERR_IRQ_CONFLIT; |
1da177e4 LT |
2444 | } |
2445 | ||
8ea2c2ec JJ |
2446 | if (!irq) |
2447 | return MXSER_ERR_IRQ; | |
1c45607a | 2448 | brd->irq = ((int)(irq & 0xF000) >> 12); |
1da177e4 | 2449 | for (i = 0; i < 8; i++) |
1c45607a | 2450 | brd->ports[i].ioaddr = (int) regs[i + 1] & 0xFFF8; |
8ea2c2ec JJ |
2451 | if ((regs[12] & 0x80) == 0) |
2452 | return MXSER_ERR_VECTOR; | |
1c45607a | 2453 | brd->vector = (int)regs[11]; /* interrupt vector */ |
1da177e4 | 2454 | if (id == 1) |
1c45607a | 2455 | brd->vector_mask = 0x00FF; |
1da177e4 | 2456 | else |
1c45607a | 2457 | brd->vector_mask = 0x000F; |
1da177e4 LT |
2458 | for (i = 7, bits = 0x0100; i >= 0; i--, bits <<= 1) { |
2459 | if (regs[12] & bits) { | |
1c45607a JS |
2460 | brd->ports[i].baud_base = 921600; |
2461 | brd->ports[i].max_baud = 921600; | |
1da177e4 | 2462 | } else { |
1c45607a JS |
2463 | brd->ports[i].baud_base = 115200; |
2464 | brd->ports[i].max_baud = 115200; | |
1da177e4 LT |
2465 | } |
2466 | } | |
2467 | scratch2 = inb(cap + UART_LCR) & (~UART_LCR_DLAB); | |
2468 | outb(scratch2 | UART_LCR_DLAB, cap + UART_LCR); | |
2469 | outb(0, cap + UART_EFR); /* EFR is the same as FCR */ | |
2470 | outb(scratch2, cap + UART_LCR); | |
2471 | outb(UART_FCR_ENABLE_FIFO, cap + UART_FCR); | |
2472 | scratch = inb(cap + UART_IIR); | |
2473 | ||
2474 | if (scratch & 0xC0) | |
1c45607a | 2475 | brd->uart_type = PORT_16550A; |
1da177e4 | 2476 | else |
1c45607a JS |
2477 | brd->uart_type = PORT_16450; |
2478 | if (!request_region(brd->ports[0].ioaddr, 8 * brd->info->nports, | |
2479 | "mxser(IO)")) | |
2480 | return MXSER_ERR_IOADDR; | |
2481 | if (!request_region(brd->vector, 1, "mxser(vector)")) { | |
2482 | release_region(brd->ports[0].ioaddr, 8 * brd->info->nports); | |
2483 | return MXSER_ERR_VECTOR; | |
2484 | } | |
2485 | return brd->info->nports; | |
1da177e4 LT |
2486 | } |
2487 | ||
1c45607a JS |
2488 | static int __devinit mxser_probe(struct pci_dev *pdev, |
2489 | const struct pci_device_id *ent) | |
1da177e4 | 2490 | { |
1c45607a JS |
2491 | #ifdef CONFIG_PCI |
2492 | struct mxser_board *brd; | |
2493 | unsigned int i, j; | |
2494 | unsigned long ioaddress; | |
2495 | int retval = -EINVAL; | |
1da177e4 | 2496 | |
1c45607a JS |
2497 | for (i = 0; i < MXSER_BOARDS; i++) |
2498 | if (mxser_boards[i].info == NULL) | |
2499 | break; | |
2500 | ||
2501 | if (i >= MXSER_BOARDS) { | |
2502 | printk(KERN_ERR "Too many Smartio/Industio family boards found " | |
2503 | "(maximum %d), board not configured\n", MXSER_BOARDS); | |
2504 | goto err; | |
2505 | } | |
2506 | ||
2507 | brd = &mxser_boards[i]; | |
2508 | brd->idx = i * MXSER_PORTS_PER_BOARD; | |
2509 | printk(KERN_INFO "Found MOXA %s board (BusNo=%d, DevNo=%d)\n", | |
2510 | mxser_cards[ent->driver_data].name, | |
2511 | pdev->bus->number, PCI_SLOT(pdev->devfn)); | |
2512 | ||
2513 | retval = pci_enable_device(pdev); | |
2514 | if (retval) { | |
2515 | printk(KERN_ERR "Moxa SmartI/O PCI enable fail !\n"); | |
2516 | goto err; | |
2517 | } | |
2518 | ||
2519 | /* io address */ | |
2520 | ioaddress = pci_resource_start(pdev, 2); | |
2521 | retval = pci_request_region(pdev, 2, "mxser(IO)"); | |
2522 | if (retval) | |
2523 | goto err; | |
2524 | ||
2525 | brd->info = &mxser_cards[ent->driver_data]; | |
2526 | for (i = 0; i < brd->info->nports; i++) | |
2527 | brd->ports[i].ioaddr = ioaddress + 8 * i; | |
2528 | ||
2529 | /* vector */ | |
2530 | ioaddress = pci_resource_start(pdev, 3); | |
2531 | retval = pci_request_region(pdev, 3, "mxser(vector)"); | |
2532 | if (retval) | |
2533 | goto err_relio; | |
2534 | brd->vector = ioaddress; | |
2535 | ||
2536 | /* irq */ | |
2537 | brd->irq = pdev->irq; | |
2538 | ||
2539 | brd->chip_flag = CheckIsMoxaMust(brd->ports[0].ioaddr); | |
2540 | brd->uart_type = PORT_16550A; | |
2541 | brd->vector_mask = 0; | |
2542 | ||
2543 | for (i = 0; i < brd->info->nports; i++) { | |
2544 | for (j = 0; j < UART_INFO_NUM; j++) { | |
2545 | if (Gpci_uart_info[j].type == brd->chip_flag) { | |
2546 | brd->ports[i].max_baud = | |
2547 | Gpci_uart_info[j].max_baud; | |
2548 | ||
2549 | /* exception....CP-102 */ | |
2550 | if (brd->info->flags & MXSER_HIGHBAUD) | |
2551 | brd->ports[i].max_baud = 921600; | |
2552 | break; | |
1da177e4 LT |
2553 | } |
2554 | } | |
1c45607a JS |
2555 | } |
2556 | ||
2557 | if (brd->chip_flag == MOXA_MUST_MU860_HWID) { | |
2558 | for (i = 0; i < brd->info->nports; i++) { | |
2559 | if (i < 4) | |
2560 | brd->ports[i].opmode_ioaddr = ioaddress + 4; | |
2561 | else | |
2562 | brd->ports[i].opmode_ioaddr = ioaddress + 0x0c; | |
1da177e4 | 2563 | } |
1c45607a JS |
2564 | outb(0, ioaddress + 4); /* default set to RS232 mode */ |
2565 | outb(0, ioaddress + 0x0c); /* default set to RS232 mode */ | |
1da177e4 | 2566 | } |
1c45607a JS |
2567 | |
2568 | for (i = 0; i < brd->info->nports; i++) { | |
2569 | brd->vector_mask |= (1 << i); | |
2570 | brd->ports[i].baud_base = 921600; | |
2571 | } | |
2572 | ||
2573 | /* mxser_initbrd will hook ISR. */ | |
2574 | retval = mxser_initbrd(brd, pdev); | |
2575 | if (retval) | |
2576 | goto err_null; | |
2577 | ||
2578 | for (i = 0; i < brd->info->nports; i++) | |
2579 | tty_register_device(mxvar_sdriver, brd->idx + i, &pdev->dev); | |
2580 | ||
2581 | pci_set_drvdata(pdev, brd); | |
2582 | ||
2583 | return 0; | |
2584 | err_relio: | |
2585 | pci_release_region(pdev, 2); | |
2586 | err_null: | |
2587 | brd->info = NULL; | |
2588 | err: | |
2589 | return retval; | |
2590 | #else | |
2591 | return -ENODEV; | |
2592 | #endif | |
1da177e4 LT |
2593 | } |
2594 | ||
1c45607a | 2595 | static void __devexit mxser_remove(struct pci_dev *pdev) |
1da177e4 | 2596 | { |
1c45607a JS |
2597 | struct mxser_board *brd = pci_get_drvdata(pdev); |
2598 | unsigned int i; | |
1da177e4 | 2599 | |
1c45607a JS |
2600 | for (i = 0; i < brd->info->nports; i++) |
2601 | tty_unregister_device(mxvar_sdriver, brd->idx + i); | |
1da177e4 | 2602 | |
1c45607a JS |
2603 | mxser_release_res(brd, pdev, 1); |
2604 | brd->info = NULL; | |
1da177e4 LT |
2605 | } |
2606 | ||
1c45607a JS |
2607 | static struct pci_driver mxser_driver = { |
2608 | .name = "mxser", | |
2609 | .id_table = mxser_pcibrds, | |
2610 | .probe = mxser_probe, | |
2611 | .remove = __devexit_p(mxser_remove) | |
2612 | }; | |
2613 | ||
2614 | static int __init mxser_module_init(void) | |
1da177e4 | 2615 | { |
1c45607a JS |
2616 | struct mxser_board *brd; |
2617 | unsigned long cap; | |
2618 | unsigned int i, m, isaloop; | |
2619 | int retval, b; | |
1da177e4 | 2620 | |
1c45607a JS |
2621 | pr_debug("Loading module mxser ...\n"); |
2622 | ||
2623 | mxvar_sdriver = alloc_tty_driver(MXSER_PORTS + 1); | |
2624 | if (!mxvar_sdriver) | |
2625 | return -ENOMEM; | |
2626 | ||
2627 | printk(KERN_INFO "MOXA Smartio/Industio family driver version %s\n", | |
2628 | MXSER_VERSION); | |
2629 | ||
2630 | /* Initialize the tty_driver structure */ | |
2631 | mxvar_sdriver->owner = THIS_MODULE; | |
2632 | mxvar_sdriver->magic = TTY_DRIVER_MAGIC; | |
2633 | mxvar_sdriver->name = "ttyMI"; | |
2634 | mxvar_sdriver->major = ttymajor; | |
2635 | mxvar_sdriver->minor_start = 0; | |
2636 | mxvar_sdriver->num = MXSER_PORTS + 1; | |
2637 | mxvar_sdriver->type = TTY_DRIVER_TYPE_SERIAL; | |
2638 | mxvar_sdriver->subtype = SERIAL_TYPE_NORMAL; | |
2639 | mxvar_sdriver->init_termios = tty_std_termios; | |
2640 | mxvar_sdriver->init_termios.c_cflag = B9600|CS8|CREAD|HUPCL|CLOCAL; | |
2641 | mxvar_sdriver->flags = TTY_DRIVER_REAL_RAW|TTY_DRIVER_DYNAMIC_DEV; | |
2642 | tty_set_operations(mxvar_sdriver, &mxser_ops); | |
2643 | ||
2644 | retval = tty_register_driver(mxvar_sdriver); | |
2645 | if (retval) { | |
2646 | printk(KERN_ERR "Couldn't install MOXA Smartio/Industio family " | |
2647 | "tty driver !\n"); | |
2648 | goto err_put; | |
1da177e4 | 2649 | } |
1c45607a JS |
2650 | |
2651 | mxvar_diagflag = 0; | |
2652 | ||
2653 | m = 0; | |
2654 | /* Start finding ISA boards here */ | |
2655 | for (isaloop = 0; isaloop < 2; isaloop++) | |
2656 | for (b = 0; b < MXSER_BOARDS && m < MXSER_BOARDS; b++) { | |
2657 | if (!isaloop) | |
2658 | cap = mxserBoardCAP[b]; /* predefined */ | |
2659 | else | |
2660 | cap = ioaddr[b]; /* module param */ | |
2661 | ||
2662 | if (!cap) | |
2663 | continue; | |
2664 | ||
2665 | brd = &mxser_boards[m]; | |
2666 | retval = mxser_get_ISA_conf(cap, brd); | |
2667 | ||
2668 | if (retval != 0) | |
2669 | printk(KERN_INFO "Found MOXA %s board " | |
2670 | "(CAP=0x%x)\n", | |
2671 | brd->info->name, ioaddr[b]); | |
2672 | ||
2673 | if (retval <= 0) { | |
2674 | if (retval == MXSER_ERR_IRQ) | |
2675 | printk(KERN_ERR "Invalid interrupt " | |
2676 | "number, board not " | |
2677 | "configured\n"); | |
2678 | else if (retval == MXSER_ERR_IRQ_CONFLIT) | |
2679 | printk(KERN_ERR "Invalid interrupt " | |
2680 | "number, board not " | |
2681 | "configured\n"); | |
2682 | else if (retval == MXSER_ERR_VECTOR) | |
2683 | printk(KERN_ERR "Invalid interrupt " | |
2684 | "vector, board not " | |
2685 | "configured\n"); | |
2686 | else if (retval == MXSER_ERR_IOADDR) | |
2687 | printk(KERN_ERR "Invalid I/O address, " | |
2688 | "board not configured\n"); | |
2689 | ||
2690 | brd->info = NULL; | |
2691 | continue; | |
2692 | } | |
2693 | ||
2694 | /* mxser_initbrd will hook ISR. */ | |
2695 | if (mxser_initbrd(brd, NULL) < 0) { | |
2696 | brd->info = NULL; | |
2697 | continue; | |
2698 | } | |
2699 | ||
2700 | brd->idx = m * MXSER_PORTS_PER_BOARD; | |
2701 | for (i = 0; i < brd->info->nports; i++) | |
2702 | tty_register_device(mxvar_sdriver, brd->idx + i, | |
2703 | NULL); | |
2704 | ||
2705 | m++; | |
2706 | } | |
2707 | ||
2708 | retval = pci_register_driver(&mxser_driver); | |
2709 | if (retval) { | |
2710 | printk(KERN_ERR "Can't register pci driver\n"); | |
2711 | if (!m) { | |
2712 | retval = -ENODEV; | |
2713 | goto err_unr; | |
2714 | } /* else: we have some ISA cards under control */ | |
2715 | } | |
2716 | ||
2717 | pr_debug("Done.\n"); | |
2718 | ||
2719 | return 0; | |
2720 | err_unr: | |
2721 | tty_unregister_driver(mxvar_sdriver); | |
2722 | err_put: | |
2723 | put_tty_driver(mxvar_sdriver); | |
2724 | return retval; | |
2725 | } | |
2726 | ||
2727 | static void __exit mxser_module_exit(void) | |
2728 | { | |
2729 | unsigned int i, j; | |
2730 | ||
2731 | pr_debug("Unloading module mxser ...\n"); | |
2732 | ||
2733 | pci_unregister_driver(&mxser_driver); | |
2734 | ||
2735 | for (i = 0; i < MXSER_BOARDS; i++) /* ISA remains */ | |
2736 | if (mxser_boards[i].info != NULL) | |
2737 | for (j = 0; j < mxser_boards[i].info->nports; j++) | |
2738 | tty_unregister_device(mxvar_sdriver, | |
2739 | mxser_boards[i].idx + j); | |
2740 | tty_unregister_driver(mxvar_sdriver); | |
2741 | put_tty_driver(mxvar_sdriver); | |
2742 | ||
2743 | for (i = 0; i < MXSER_BOARDS; i++) | |
2744 | if (mxser_boards[i].info != NULL) | |
2745 | mxser_release_res(&mxser_boards[i], NULL, 1); | |
2746 | ||
2747 | pr_debug("Done.\n"); | |
1da177e4 LT |
2748 | } |
2749 | ||
2750 | module_init(mxser_module_init); | |
2751 | module_exit(mxser_module_exit); |