Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1 | /* |
| 2 | * specialix.c -- specialix IO8+ multiport serial driver. |
| 3 | * |
| 4 | * Copyright (C) 1997 Roger Wolff (R.E.Wolff@BitWizard.nl) |
| 5 | * Copyright (C) 1994-1996 Dmitry Gorodchanin (pgmdsg@ibi.com) |
| 6 | * |
| 7 | * Specialix pays for the development and support of this driver. |
| 8 | * Please DO contact io8-linux@specialix.co.uk if you require |
| 9 | * support. But please read the documentation (specialix.txt) |
| 10 | * first. |
| 11 | * |
| 12 | * This driver was developped in the BitWizard linux device |
| 13 | * driver service. If you require a linux device driver for your |
| 14 | * product, please contact devices@BitWizard.nl for a quote. |
| 15 | * |
| 16 | * This code is firmly based on the riscom/8 serial driver, |
| 17 | * written by Dmitry Gorodchanin. The specialix IO8+ card |
| 18 | * programming information was obtained from the CL-CD1865 Data |
| 19 | * Book, and Specialix document number 6200059: IO8+ Hardware |
| 20 | * Functional Specification. |
| 21 | * |
| 22 | * This program is free software; you can redistribute it and/or |
| 23 | * modify it under the terms of the GNU General Public License as |
| 24 | * published by the Free Software Foundation; either version 2 of |
| 25 | * the License, or (at your option) any later version. |
| 26 | * |
| 27 | * This program is distributed in the hope that it will be |
| 28 | * useful, but WITHOUT ANY WARRANTY; without even the implied |
| 29 | * warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR |
| 30 | * PURPOSE. See the GNU General Public License for more details. |
| 31 | * |
| 32 | * You should have received a copy of the GNU General Public |
| 33 | * License along with this program; if not, write to the Free |
| 34 | * Software Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, |
| 35 | * USA. |
| 36 | * |
| 37 | * Revision history: |
| 38 | * |
| 39 | * Revision 1.0: April 1st 1997. |
| 40 | * Initial release for alpha testing. |
Jeff Garzik | d61780c | 2005-10-30 15:01:51 -0800 | [diff] [blame] | 41 | * Revision 1.1: April 14th 1997. |
| 42 | * Incorporated Richard Hudsons suggestions, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 43 | * removed some debugging printk's. |
| 44 | * Revision 1.2: April 15th 1997. |
| 45 | * Ported to 2.1.x kernels. |
Jeff Garzik | d61780c | 2005-10-30 15:01:51 -0800 | [diff] [blame] | 46 | * Revision 1.3: April 17th 1997 |
| 47 | * Backported to 2.0. (Compatibility macros). |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 48 | * Revision 1.4: April 18th 1997 |
Jeff Garzik | d61780c | 2005-10-30 15:01:51 -0800 | [diff] [blame] | 49 | * Fixed DTR/RTS bug that caused the card to indicate |
| 50 | * "don't send data" to a modem after the password prompt. |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 51 | * Fixed bug for premature (fake) interrupts. |
| 52 | * Revision 1.5: April 19th 1997 |
Jeff Garzik | d61780c | 2005-10-30 15:01:51 -0800 | [diff] [blame] | 53 | * fixed a minor typo in the header file, cleanup a little. |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 54 | * performance warnings are now MAXed at once per minute. |
| 55 | * Revision 1.6: May 23 1997 |
| 56 | * Changed the specialix=... format to include interrupt. |
| 57 | * Revision 1.7: May 27 1997 |
| 58 | * Made many more debug printk's a compile time option. |
| 59 | * Revision 1.8: Jul 1 1997 |
| 60 | * port to linux-2.1.43 kernel. |
| 61 | * Revision 1.9: Oct 9 1998 |
| 62 | * Added stuff for the IO8+/PCI version. |
Jeff Garzik | d61780c | 2005-10-30 15:01:51 -0800 | [diff] [blame] | 63 | * Revision 1.10: Oct 22 1999 / Jan 21 2000. |
| 64 | * Added stuff for setserial. |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 65 | * Nicolas Mailhot (Nicolas.Mailhot@email.enst.fr) |
Jeff Garzik | d61780c | 2005-10-30 15:01:51 -0800 | [diff] [blame] | 66 | * |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 67 | */ |
| 68 | |
| 69 | #define VERSION "1.11" |
| 70 | |
| 71 | |
| 72 | /* |
| 73 | * There is a bunch of documentation about the card, jumpers, config |
| 74 | * settings, restrictions, cables, device names and numbers in |
| 75 | * Documentation/specialix.txt |
| 76 | */ |
| 77 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 78 | #include <linux/module.h> |
| 79 | |
| 80 | #include <asm/io.h> |
| 81 | #include <linux/kernel.h> |
| 82 | #include <linux/sched.h> |
| 83 | #include <linux/ioport.h> |
| 84 | #include <linux/interrupt.h> |
| 85 | #include <linux/errno.h> |
| 86 | #include <linux/tty.h> |
Alan Cox | 33f0f88 | 2006-01-09 20:54:13 -0800 | [diff] [blame] | 87 | #include <linux/tty_flip.h> |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 88 | #include <linux/mm.h> |
| 89 | #include <linux/serial.h> |
| 90 | #include <linux/fcntl.h> |
| 91 | #include <linux/major.h> |
| 92 | #include <linux/delay.h> |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 93 | #include <linux/pci.h> |
| 94 | #include <linux/init.h> |
| 95 | #include <asm/uaccess.h> |
| 96 | |
| 97 | #include "specialix_io8.h" |
| 98 | #include "cd1865.h" |
| 99 | |
| 100 | |
| 101 | /* |
| 102 | This driver can spew a whole lot of debugging output at you. If you |
| 103 | need maximum performance, you should disable the DEBUG define. To |
| 104 | aid in debugging in the field, I'm leaving the compile-time debug |
| 105 | features enabled, and disable them "runtime". That allows me to |
| 106 | instruct people with problems to enable debugging without requiring |
| 107 | them to recompile... |
| 108 | */ |
| 109 | #define DEBUG |
| 110 | |
| 111 | static int sx_debug; |
| 112 | static int sx_rxfifo = SPECIALIX_RXFIFO; |
| 113 | |
| 114 | #ifdef DEBUG |
| 115 | #define dprintk(f, str...) if (sx_debug & f) printk (str) |
| 116 | #else |
| 117 | #define dprintk(f, str...) /* nothing */ |
| 118 | #endif |
| 119 | |
| 120 | #define SX_DEBUG_FLOW 0x0001 |
| 121 | #define SX_DEBUG_DATA 0x0002 |
| 122 | #define SX_DEBUG_PROBE 0x0004 |
| 123 | #define SX_DEBUG_CHAN 0x0008 |
| 124 | #define SX_DEBUG_INIT 0x0010 |
| 125 | #define SX_DEBUG_RX 0x0020 |
| 126 | #define SX_DEBUG_TX 0x0040 |
| 127 | #define SX_DEBUG_IRQ 0x0080 |
| 128 | #define SX_DEBUG_OPEN 0x0100 |
| 129 | #define SX_DEBUG_TERMIOS 0x0200 |
| 130 | #define SX_DEBUG_SIGNALS 0x0400 |
| 131 | #define SX_DEBUG_FIFO 0x0800 |
| 132 | |
| 133 | |
| 134 | #define func_enter() dprintk (SX_DEBUG_FLOW, "io8: enter %s\n",__FUNCTION__) |
| 135 | #define func_exit() dprintk (SX_DEBUG_FLOW, "io8: exit %s\n", __FUNCTION__) |
| 136 | |
| 137 | #define jiffies_from_ms(a) ((((a) * HZ)/1000)+1) |
| 138 | |
| 139 | |
| 140 | /* Configurable options: */ |
| 141 | |
| 142 | /* Am I paranoid or not ? ;-) */ |
| 143 | #define SPECIALIX_PARANOIA_CHECK |
| 144 | |
| 145 | /* Do I trust the IRQ from the card? (enabeling it doesn't seem to help) |
| 146 | When the IRQ routine leaves the chip in a state that is keeps on |
| 147 | requiring attention, the timer doesn't help either. */ |
| 148 | #undef SPECIALIX_TIMER |
| 149 | |
| 150 | #ifdef SPECIALIX_TIMER |
| 151 | static int sx_poll = HZ; |
| 152 | #endif |
| 153 | |
| 154 | |
| 155 | |
Jeff Garzik | d61780c | 2005-10-30 15:01:51 -0800 | [diff] [blame] | 156 | /* |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 157 | * The following defines are mostly for testing purposes. But if you need |
| 158 | * some nice reporting in your syslog, you can define them also. |
| 159 | */ |
| 160 | #undef SX_REPORT_FIFO |
| 161 | #undef SX_REPORT_OVERRUN |
| 162 | |
| 163 | |
| 164 | |
| 165 | #ifdef CONFIG_SPECIALIX_RTSCTS |
| 166 | #define SX_CRTSCTS(bla) 1 |
| 167 | #else |
| 168 | #define SX_CRTSCTS(tty) C_CRTSCTS(tty) |
| 169 | #endif |
| 170 | |
| 171 | |
| 172 | /* Used to be outb (0xff, 0x80); */ |
| 173 | #define short_pause() udelay (1) |
| 174 | |
| 175 | |
| 176 | #define SPECIALIX_LEGAL_FLAGS \ |
| 177 | (ASYNC_HUP_NOTIFY | ASYNC_SAK | ASYNC_SPLIT_TERMIOS | \ |
| 178 | ASYNC_SPD_HI | ASYNC_SPEED_VHI | ASYNC_SESSION_LOCKOUT | \ |
| 179 | ASYNC_PGRP_LOCKOUT | ASYNC_CALLOUT_NOHUP) |
| 180 | |
| 181 | #undef RS_EVENT_WRITE_WAKEUP |
| 182 | #define RS_EVENT_WRITE_WAKEUP 0 |
| 183 | |
| 184 | static struct tty_driver *specialix_driver; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 185 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 186 | static struct specialix_board sx_board[SX_NBOARD] = { |
| 187 | { 0, SX_IOBASE1, 9, }, |
| 188 | { 0, SX_IOBASE2, 11, }, |
| 189 | { 0, SX_IOBASE3, 12, }, |
| 190 | { 0, SX_IOBASE4, 15, }, |
| 191 | }; |
| 192 | |
| 193 | static struct specialix_port sx_port[SX_NBOARD * SX_NPORT]; |
| 194 | |
| 195 | |
| 196 | #ifdef SPECIALIX_TIMER |
| 197 | static struct timer_list missed_irq_timer; |
David Howells | 7d12e78 | 2006-10-05 14:55:46 +0100 | [diff] [blame] | 198 | static irqreturn_t sx_interrupt(int irq, void * dev_id); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 199 | #endif |
| 200 | |
| 201 | |
| 202 | |
| 203 | static inline int sx_paranoia_check(struct specialix_port const * port, |
| 204 | char *name, const char *routine) |
| 205 | { |
| 206 | #ifdef SPECIALIX_PARANOIA_CHECK |
| 207 | static const char *badmagic = |
| 208 | KERN_ERR "sx: Warning: bad specialix port magic number for device %s in %s\n"; |
| 209 | static const char *badinfo = |
| 210 | KERN_ERR "sx: Warning: null specialix port for device %s in %s\n"; |
Jeff Garzik | d61780c | 2005-10-30 15:01:51 -0800 | [diff] [blame] | 211 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 212 | if (!port) { |
| 213 | printk(badinfo, name, routine); |
| 214 | return 1; |
| 215 | } |
| 216 | if (port->magic != SPECIALIX_MAGIC) { |
| 217 | printk(badmagic, name, routine); |
| 218 | return 1; |
| 219 | } |
| 220 | #endif |
| 221 | return 0; |
| 222 | } |
| 223 | |
| 224 | |
| 225 | /* |
Jeff Garzik | d61780c | 2005-10-30 15:01:51 -0800 | [diff] [blame] | 226 | * |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 227 | * Service functions for specialix IO8+ driver. |
Jeff Garzik | d61780c | 2005-10-30 15:01:51 -0800 | [diff] [blame] | 228 | * |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 229 | */ |
| 230 | |
| 231 | /* Get board number from pointer */ |
| 232 | static inline int board_No (struct specialix_board * bp) |
| 233 | { |
| 234 | return bp - sx_board; |
| 235 | } |
| 236 | |
| 237 | |
| 238 | /* Get port number from pointer */ |
| 239 | static inline int port_No (struct specialix_port const * port) |
| 240 | { |
Jeff Garzik | d61780c | 2005-10-30 15:01:51 -0800 | [diff] [blame] | 241 | return SX_PORT(port - sx_port); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 242 | } |
| 243 | |
| 244 | |
| 245 | /* Get pointer to board from pointer to port */ |
| 246 | static inline struct specialix_board * port_Board(struct specialix_port const * port) |
| 247 | { |
| 248 | return &sx_board[SX_BOARD(port - sx_port)]; |
| 249 | } |
| 250 | |
| 251 | |
| 252 | /* Input Byte from CL CD186x register */ |
| 253 | static inline unsigned char sx_in(struct specialix_board * bp, unsigned short reg) |
| 254 | { |
| 255 | bp->reg = reg | 0x80; |
| 256 | outb (reg | 0x80, bp->base + SX_ADDR_REG); |
| 257 | return inb (bp->base + SX_DATA_REG); |
| 258 | } |
| 259 | |
| 260 | |
| 261 | /* Output Byte to CL CD186x register */ |
| 262 | static inline void sx_out(struct specialix_board * bp, unsigned short reg, |
| 263 | unsigned char val) |
| 264 | { |
| 265 | bp->reg = reg | 0x80; |
| 266 | outb (reg | 0x80, bp->base + SX_ADDR_REG); |
| 267 | outb (val, bp->base + SX_DATA_REG); |
| 268 | } |
| 269 | |
| 270 | |
| 271 | /* Input Byte from CL CD186x register */ |
| 272 | static inline unsigned char sx_in_off(struct specialix_board * bp, unsigned short reg) |
| 273 | { |
| 274 | bp->reg = reg; |
| 275 | outb (reg, bp->base + SX_ADDR_REG); |
| 276 | return inb (bp->base + SX_DATA_REG); |
| 277 | } |
| 278 | |
| 279 | |
| 280 | /* Output Byte to CL CD186x register */ |
| 281 | static inline void sx_out_off(struct specialix_board * bp, unsigned short reg, |
| 282 | unsigned char val) |
| 283 | { |
| 284 | bp->reg = reg; |
| 285 | outb (reg, bp->base + SX_ADDR_REG); |
| 286 | outb (val, bp->base + SX_DATA_REG); |
| 287 | } |
| 288 | |
| 289 | |
| 290 | /* Wait for Channel Command Register ready */ |
| 291 | static inline void sx_wait_CCR(struct specialix_board * bp) |
| 292 | { |
| 293 | unsigned long delay, flags; |
| 294 | unsigned char ccr; |
| 295 | |
| 296 | for (delay = SX_CCR_TIMEOUT; delay; delay--) { |
| 297 | spin_lock_irqsave(&bp->lock, flags); |
| 298 | ccr = sx_in(bp, CD186x_CCR); |
| 299 | spin_unlock_irqrestore(&bp->lock, flags); |
| 300 | if (!ccr) |
| 301 | return; |
| 302 | udelay (1); |
| 303 | } |
Jeff Garzik | d61780c | 2005-10-30 15:01:51 -0800 | [diff] [blame] | 304 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 305 | printk(KERN_ERR "sx%d: Timeout waiting for CCR.\n", board_No(bp)); |
| 306 | } |
| 307 | |
| 308 | |
| 309 | /* Wait for Channel Command Register ready */ |
| 310 | static inline void sx_wait_CCR_off(struct specialix_board * bp) |
| 311 | { |
| 312 | unsigned long delay; |
| 313 | unsigned char crr; |
| 314 | unsigned long flags; |
| 315 | |
| 316 | for (delay = SX_CCR_TIMEOUT; delay; delay--) { |
| 317 | spin_lock_irqsave(&bp->lock, flags); |
| 318 | crr = sx_in_off(bp, CD186x_CCR); |
| 319 | spin_unlock_irqrestore(&bp->lock, flags); |
| 320 | if (!crr) |
| 321 | return; |
| 322 | udelay (1); |
| 323 | } |
Jeff Garzik | d61780c | 2005-10-30 15:01:51 -0800 | [diff] [blame] | 324 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 325 | printk(KERN_ERR "sx%d: Timeout waiting for CCR.\n", board_No(bp)); |
| 326 | } |
| 327 | |
| 328 | |
| 329 | /* |
| 330 | * specialix IO8+ IO range functions. |
| 331 | */ |
| 332 | |
Jeff Garzik | d61780c | 2005-10-30 15:01:51 -0800 | [diff] [blame] | 333 | static inline int sx_request_io_range(struct specialix_board * bp) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 334 | { |
Jeff Garzik | d61780c | 2005-10-30 15:01:51 -0800 | [diff] [blame] | 335 | return request_region(bp->base, |
| 336 | bp->flags & SX_BOARD_IS_PCI ? SX_PCI_IO_SPACE : SX_IO_SPACE, |
| 337 | "specialix IO8+") == NULL; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 338 | } |
| 339 | |
| 340 | |
| 341 | static inline void sx_release_io_range(struct specialix_board * bp) |
| 342 | { |
Jeff Garzik | d61780c | 2005-10-30 15:01:51 -0800 | [diff] [blame] | 343 | release_region(bp->base, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 344 | bp->flags&SX_BOARD_IS_PCI?SX_PCI_IO_SPACE:SX_IO_SPACE); |
| 345 | } |
| 346 | |
Jeff Garzik | d61780c | 2005-10-30 15:01:51 -0800 | [diff] [blame] | 347 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 348 | /* Must be called with enabled interrupts */ |
Jeff Garzik | d61780c | 2005-10-30 15:01:51 -0800 | [diff] [blame] | 349 | /* Ugly. Very ugly. Don't use this for anything else than initialization |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 350 | code */ |
| 351 | static inline void sx_long_delay(unsigned long delay) |
| 352 | { |
| 353 | unsigned long i; |
Jeff Garzik | d61780c | 2005-10-30 15:01:51 -0800 | [diff] [blame] | 354 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 355 | for (i = jiffies + delay; time_after(i, jiffies); ) ; |
| 356 | } |
| 357 | |
| 358 | |
| 359 | |
| 360 | /* Set the IRQ using the RTS lines that run to the PAL on the board.... */ |
| 361 | static int sx_set_irq ( struct specialix_board *bp) |
| 362 | { |
| 363 | int virq; |
| 364 | int i; |
| 365 | unsigned long flags; |
| 366 | |
Jeff Garzik | d61780c | 2005-10-30 15:01:51 -0800 | [diff] [blame] | 367 | if (bp->flags & SX_BOARD_IS_PCI) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 368 | return 1; |
| 369 | switch (bp->irq) { |
| 370 | /* In the same order as in the docs... */ |
| 371 | case 15: virq = 0;break; |
| 372 | case 12: virq = 1;break; |
| 373 | case 11: virq = 2;break; |
| 374 | case 9: virq = 3;break; |
| 375 | default: printk (KERN_ERR "Speclialix: cannot set irq to %d.\n", bp->irq); |
| 376 | return 0; |
| 377 | } |
| 378 | spin_lock_irqsave(&bp->lock, flags); |
| 379 | for (i=0;i<2;i++) { |
| 380 | sx_out(bp, CD186x_CAR, i); |
| 381 | sx_out(bp, CD186x_MSVRTS, ((virq >> i) & 0x1)? MSVR_RTS:0); |
| 382 | } |
| 383 | spin_unlock_irqrestore(&bp->lock, flags); |
| 384 | return 1; |
| 385 | } |
| 386 | |
| 387 | |
| 388 | /* Reset and setup CD186x chip */ |
| 389 | static int sx_init_CD186x(struct specialix_board * bp) |
| 390 | { |
| 391 | unsigned long flags; |
| 392 | int scaler; |
| 393 | int rv = 1; |
| 394 | |
| 395 | func_enter(); |
| 396 | sx_wait_CCR_off(bp); /* Wait for CCR ready */ |
| 397 | spin_lock_irqsave(&bp->lock, flags); |
| 398 | sx_out_off(bp, CD186x_CCR, CCR_HARDRESET); /* Reset CD186x chip */ |
| 399 | spin_unlock_irqrestore(&bp->lock, flags); |
| 400 | sx_long_delay(HZ/20); /* Delay 0.05 sec */ |
| 401 | spin_lock_irqsave(&bp->lock, flags); |
| 402 | sx_out_off(bp, CD186x_GIVR, SX_ID); /* Set ID for this chip */ |
| 403 | sx_out_off(bp, CD186x_GICR, 0); /* Clear all bits */ |
| 404 | sx_out_off(bp, CD186x_PILR1, SX_ACK_MINT); /* Prio for modem intr */ |
| 405 | sx_out_off(bp, CD186x_PILR2, SX_ACK_TINT); /* Prio for transmitter intr */ |
| 406 | sx_out_off(bp, CD186x_PILR3, SX_ACK_RINT); /* Prio for receiver intr */ |
| 407 | /* Set RegAckEn */ |
| 408 | sx_out_off(bp, CD186x_SRCR, sx_in (bp, CD186x_SRCR) | SRCR_REGACKEN); |
Jeff Garzik | d61780c | 2005-10-30 15:01:51 -0800 | [diff] [blame] | 409 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 410 | /* Setting up prescaler. We need 4 ticks per 1 ms */ |
| 411 | scaler = SX_OSCFREQ/SPECIALIX_TPS; |
| 412 | |
| 413 | sx_out_off(bp, CD186x_PPRH, scaler >> 8); |
| 414 | sx_out_off(bp, CD186x_PPRL, scaler & 0xff); |
| 415 | spin_unlock_irqrestore(&bp->lock, flags); |
| 416 | |
| 417 | if (!sx_set_irq (bp)) { |
| 418 | /* Figure out how to pass this along... */ |
| 419 | printk (KERN_ERR "Cannot set irq to %d.\n", bp->irq); |
| 420 | rv = 0; |
| 421 | } |
| 422 | |
| 423 | func_exit(); |
| 424 | return rv; |
| 425 | } |
| 426 | |
| 427 | |
| 428 | static int read_cross_byte (struct specialix_board *bp, int reg, int bit) |
| 429 | { |
| 430 | int i; |
| 431 | int t; |
| 432 | unsigned long flags; |
| 433 | |
| 434 | spin_lock_irqsave(&bp->lock, flags); |
| 435 | for (i=0, t=0;i<8;i++) { |
| 436 | sx_out_off (bp, CD186x_CAR, i); |
Jeff Garzik | d61780c | 2005-10-30 15:01:51 -0800 | [diff] [blame] | 437 | if (sx_in_off (bp, reg) & bit) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 438 | t |= 1 << i; |
| 439 | } |
| 440 | spin_unlock_irqrestore(&bp->lock, flags); |
| 441 | |
| 442 | return t; |
| 443 | } |
| 444 | |
| 445 | |
| 446 | #ifdef SPECIALIX_TIMER |
| 447 | void missed_irq (unsigned long data) |
| 448 | { |
| 449 | unsigned char irq; |
| 450 | unsigned long flags; |
| 451 | struct specialix_board *bp = (struct specialix_board *)data; |
| 452 | |
| 453 | spin_lock_irqsave(&bp->lock, flags); |
| 454 | irq = sx_in ((struct specialix_board *)data, CD186x_SRSR) & |
| 455 | (SRSR_RREQint | |
| 456 | SRSR_TREQint | |
| 457 | SRSR_MREQint); |
| 458 | spin_unlock_irqrestore(&bp->lock, flags); |
| 459 | if (irq) { |
| 460 | printk (KERN_INFO "Missed interrupt... Calling int from timer. \n"); |
Jeff Garzik | d61780c | 2005-10-30 15:01:51 -0800 | [diff] [blame] | 461 | sx_interrupt (((struct specialix_board *)data)->irq, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 462 | (void*)data, NULL); |
| 463 | } |
| 464 | missed_irq_timer.expires = jiffies + sx_poll; |
| 465 | add_timer (&missed_irq_timer); |
| 466 | } |
| 467 | #endif |
| 468 | |
| 469 | |
| 470 | |
| 471 | /* Main probing routine, also sets irq. */ |
| 472 | static int sx_probe(struct specialix_board *bp) |
| 473 | { |
| 474 | unsigned char val1, val2; |
| 475 | #if 0 |
| 476 | int irqs = 0; |
| 477 | int retries; |
| 478 | #endif |
| 479 | int rev; |
| 480 | int chip; |
| 481 | |
| 482 | func_enter(); |
| 483 | |
Jeff Garzik | d61780c | 2005-10-30 15:01:51 -0800 | [diff] [blame] | 484 | if (sx_request_io_range(bp)) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 485 | func_exit(); |
| 486 | return 1; |
| 487 | } |
| 488 | |
| 489 | /* Are the I/O ports here ? */ |
| 490 | sx_out_off(bp, CD186x_PPRL, 0x5a); |
| 491 | short_pause (); |
| 492 | val1 = sx_in_off(bp, CD186x_PPRL); |
| 493 | |
| 494 | sx_out_off(bp, CD186x_PPRL, 0xa5); |
| 495 | short_pause (); |
| 496 | val2 = sx_in_off(bp, CD186x_PPRL); |
| 497 | |
Jeff Garzik | d61780c | 2005-10-30 15:01:51 -0800 | [diff] [blame] | 498 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 499 | if ((val1 != 0x5a) || (val2 != 0xa5)) { |
| 500 | printk(KERN_INFO "sx%d: specialix IO8+ Board at 0x%03x not found.\n", |
| 501 | board_No(bp), bp->base); |
Jeff Garzik | d61780c | 2005-10-30 15:01:51 -0800 | [diff] [blame] | 502 | sx_release_io_range(bp); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 503 | func_exit(); |
| 504 | return 1; |
| 505 | } |
| 506 | |
Jeff Garzik | d61780c | 2005-10-30 15:01:51 -0800 | [diff] [blame] | 507 | /* Check the DSR lines that Specialix uses as board |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 508 | identification */ |
| 509 | val1 = read_cross_byte (bp, CD186x_MSVR, MSVR_DSR); |
| 510 | val2 = read_cross_byte (bp, CD186x_MSVR, MSVR_RTS); |
| 511 | dprintk (SX_DEBUG_INIT, "sx%d: DSR lines are: %02x, rts lines are: %02x\n", |
| 512 | board_No(bp), val1, val2); |
| 513 | |
| 514 | /* They managed to switch the bit order between the docs and |
| 515 | the IO8+ card. The new PCI card now conforms to old docs. |
| 516 | They changed the PCI docs to reflect the situation on the |
| 517 | old card. */ |
| 518 | val2 = (bp->flags & SX_BOARD_IS_PCI)?0x4d : 0xb2; |
| 519 | if (val1 != val2) { |
| 520 | printk(KERN_INFO "sx%d: specialix IO8+ ID %02x at 0x%03x not found (%02x).\n", |
| 521 | board_No(bp), val2, bp->base, val1); |
Jeff Garzik | d61780c | 2005-10-30 15:01:51 -0800 | [diff] [blame] | 522 | sx_release_io_range(bp); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 523 | func_exit(); |
| 524 | return 1; |
| 525 | } |
| 526 | |
| 527 | |
| 528 | #if 0 |
| 529 | /* It's time to find IRQ for this board */ |
| 530 | for (retries = 0; retries < 5 && irqs <= 0; retries++) { |
| 531 | irqs = probe_irq_on(); |
| 532 | sx_init_CD186x(bp); /* Reset CD186x chip */ |
| 533 | sx_out(bp, CD186x_CAR, 2); /* Select port 2 */ |
| 534 | sx_wait_CCR(bp); |
| 535 | sx_out(bp, CD186x_CCR, CCR_TXEN); /* Enable transmitter */ |
| 536 | sx_out(bp, CD186x_IER, IER_TXRDY); /* Enable tx empty intr */ |
Jeff Garzik | d61780c | 2005-10-30 15:01:51 -0800 | [diff] [blame] | 537 | sx_long_delay(HZ/20); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 538 | irqs = probe_irq_off(irqs); |
| 539 | |
| 540 | dprintk (SX_DEBUG_INIT, "SRSR = %02x, ", sx_in(bp, CD186x_SRSR)); |
| 541 | dprintk (SX_DEBUG_INIT, "TRAR = %02x, ", sx_in(bp, CD186x_TRAR)); |
| 542 | dprintk (SX_DEBUG_INIT, "GIVR = %02x, ", sx_in(bp, CD186x_GIVR)); |
| 543 | dprintk (SX_DEBUG_INIT, "GICR = %02x, ", sx_in(bp, CD186x_GICR)); |
| 544 | dprintk (SX_DEBUG_INIT, "\n"); |
| 545 | |
| 546 | /* Reset CD186x again */ |
| 547 | if (!sx_init_CD186x(bp)) { |
| 548 | /* Hmmm. This is dead code anyway. */ |
| 549 | } |
| 550 | |
| 551 | dprintk (SX_DEBUG_INIT "val1 = %02x, val2 = %02x, val3 = %02x.\n", |
Jeff Garzik | d61780c | 2005-10-30 15:01:51 -0800 | [diff] [blame] | 552 | val1, val2, val3); |
| 553 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 554 | } |
Jeff Garzik | d61780c | 2005-10-30 15:01:51 -0800 | [diff] [blame] | 555 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 556 | #if 0 |
| 557 | if (irqs <= 0) { |
| 558 | printk(KERN_ERR "sx%d: Can't find IRQ for specialix IO8+ board at 0x%03x.\n", |
| 559 | board_No(bp), bp->base); |
Jeff Garzik | d61780c | 2005-10-30 15:01:51 -0800 | [diff] [blame] | 560 | sx_release_io_range(bp); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 561 | func_exit(); |
| 562 | return 1; |
| 563 | } |
| 564 | #endif |
| 565 | printk (KERN_INFO "Started with irq=%d, but now have irq=%d.\n", bp->irq, irqs); |
| 566 | if (irqs > 0) |
| 567 | bp->irq = irqs; |
| 568 | #endif |
| 569 | /* Reset CD186x again */ |
| 570 | if (!sx_init_CD186x(bp)) { |
Jeff Garzik | d61780c | 2005-10-30 15:01:51 -0800 | [diff] [blame] | 571 | sx_release_io_range(bp); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 572 | func_exit(); |
Jeff Garzik | d61780c | 2005-10-30 15:01:51 -0800 | [diff] [blame] | 573 | return 1; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 574 | } |
| 575 | |
| 576 | sx_request_io_range(bp); |
| 577 | bp->flags |= SX_BOARD_PRESENT; |
Jeff Garzik | d61780c | 2005-10-30 15:01:51 -0800 | [diff] [blame] | 578 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 579 | /* Chip revcode pkgtype |
| 580 | GFRCR SRCR bit 7 |
| 581 | CD180 rev B 0x81 0 |
| 582 | CD180 rev C 0x82 0 |
| 583 | CD1864 rev A 0x82 1 |
Jeff Garzik | d61780c | 2005-10-30 15:01:51 -0800 | [diff] [blame] | 584 | CD1865 rev A 0x83 1 -- Do not use!!! Does not work. |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 585 | CD1865 rev B 0x84 1 |
| 586 | -- Thanks to Gwen Wang, Cirrus Logic. |
| 587 | */ |
| 588 | |
| 589 | switch (sx_in_off(bp, CD186x_GFRCR)) { |
| 590 | case 0x82:chip = 1864;rev='A';break; |
| 591 | case 0x83:chip = 1865;rev='A';break; |
| 592 | case 0x84:chip = 1865;rev='B';break; |
| 593 | case 0x85:chip = 1865;rev='C';break; /* Does not exist at this time */ |
| 594 | default:chip=-1;rev='x'; |
| 595 | } |
| 596 | |
| 597 | dprintk (SX_DEBUG_INIT, " GFCR = 0x%02x\n", sx_in_off(bp, CD186x_GFRCR) ); |
| 598 | |
| 599 | #ifdef SPECIALIX_TIMER |
| 600 | init_timer (&missed_irq_timer); |
| 601 | missed_irq_timer.function = missed_irq; |
| 602 | missed_irq_timer.data = (unsigned long) bp; |
| 603 | missed_irq_timer.expires = jiffies + sx_poll; |
| 604 | add_timer (&missed_irq_timer); |
| 605 | #endif |
| 606 | |
| 607 | printk(KERN_INFO"sx%d: specialix IO8+ board detected at 0x%03x, IRQ %d, CD%d Rev. %c.\n", |
| 608 | board_No(bp), |
| 609 | bp->base, bp->irq, |
| 610 | chip, rev); |
| 611 | |
| 612 | func_exit(); |
| 613 | return 0; |
| 614 | } |
| 615 | |
Jeff Garzik | d61780c | 2005-10-30 15:01:51 -0800 | [diff] [blame] | 616 | /* |
| 617 | * |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 618 | * Interrupt processing routines. |
| 619 | * */ |
| 620 | |
| 621 | static inline void sx_mark_event(struct specialix_port * port, int event) |
| 622 | { |
| 623 | func_enter(); |
| 624 | |
| 625 | set_bit(event, &port->event); |
| 626 | schedule_work(&port->tqueue); |
| 627 | |
| 628 | func_exit(); |
| 629 | } |
| 630 | |
| 631 | |
| 632 | static inline struct specialix_port * sx_get_port(struct specialix_board * bp, |
| 633 | unsigned char const * what) |
| 634 | { |
| 635 | unsigned char channel; |
| 636 | struct specialix_port * port = NULL; |
| 637 | |
| 638 | channel = sx_in(bp, CD186x_GICR) >> GICR_CHAN_OFF; |
| 639 | dprintk (SX_DEBUG_CHAN, "channel: %d\n", channel); |
| 640 | if (channel < CD186x_NCH) { |
| 641 | port = &sx_port[board_No(bp) * SX_NPORT + channel]; |
| 642 | dprintk (SX_DEBUG_CHAN, "port: %d %p flags: 0x%x\n",board_No(bp) * SX_NPORT + channel, port, port->flags & ASYNC_INITIALIZED); |
| 643 | |
| 644 | if (port->flags & ASYNC_INITIALIZED) { |
| 645 | dprintk (SX_DEBUG_CHAN, "port: %d %p\n", channel, port); |
| 646 | func_exit(); |
| 647 | return port; |
| 648 | } |
| 649 | } |
Jeff Garzik | d61780c | 2005-10-30 15:01:51 -0800 | [diff] [blame] | 650 | printk(KERN_INFO "sx%d: %s interrupt from invalid port %d\n", |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 651 | board_No(bp), what, channel); |
| 652 | return NULL; |
| 653 | } |
| 654 | |
| 655 | |
| 656 | static inline void sx_receive_exc(struct specialix_board * bp) |
| 657 | { |
| 658 | struct specialix_port *port; |
| 659 | struct tty_struct *tty; |
| 660 | unsigned char status; |
Alan Cox | 33f0f88 | 2006-01-09 20:54:13 -0800 | [diff] [blame] | 661 | unsigned char ch, flag; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 662 | |
| 663 | func_enter(); |
| 664 | |
| 665 | port = sx_get_port(bp, "Receive"); |
| 666 | if (!port) { |
| 667 | dprintk (SX_DEBUG_RX, "Hmm, couldn't find port.\n"); |
| 668 | func_exit(); |
| 669 | return; |
| 670 | } |
| 671 | tty = port->tty; |
Jeff Garzik | d61780c | 2005-10-30 15:01:51 -0800 | [diff] [blame] | 672 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 673 | status = sx_in(bp, CD186x_RCSR); |
| 674 | |
| 675 | dprintk (SX_DEBUG_RX, "status: 0x%x\n", status); |
| 676 | if (status & RCSR_OE) { |
| 677 | port->overrun++; |
| 678 | dprintk(SX_DEBUG_FIFO, "sx%d: port %d: Overrun. Total %ld overruns.\n", |
| 679 | board_No(bp), port_No(port), port->overrun); |
| 680 | } |
| 681 | status &= port->mark_mask; |
| 682 | |
| 683 | /* This flip buffer check needs to be below the reading of the |
| 684 | status register to reset the chip's IRQ.... */ |
Alan Cox | 33f0f88 | 2006-01-09 20:54:13 -0800 | [diff] [blame] | 685 | if (tty_buffer_request_room(tty, 1) == 0) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 686 | dprintk(SX_DEBUG_FIFO, "sx%d: port %d: Working around flip buffer overflow.\n", |
| 687 | board_No(bp), port_No(port)); |
| 688 | func_exit(); |
| 689 | return; |
| 690 | } |
| 691 | |
| 692 | ch = sx_in(bp, CD186x_RDR); |
| 693 | if (!status) { |
| 694 | func_exit(); |
| 695 | return; |
| 696 | } |
| 697 | if (status & RCSR_TOUT) { |
Jeff Garzik | d61780c | 2005-10-30 15:01:51 -0800 | [diff] [blame] | 698 | printk(KERN_INFO "sx%d: port %d: Receiver timeout. Hardware problems ?\n", |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 699 | board_No(bp), port_No(port)); |
| 700 | func_exit(); |
| 701 | return; |
Jeff Garzik | d61780c | 2005-10-30 15:01:51 -0800 | [diff] [blame] | 702 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 703 | } else if (status & RCSR_BREAK) { |
| 704 | dprintk(SX_DEBUG_RX, "sx%d: port %d: Handling break...\n", |
| 705 | board_No(bp), port_No(port)); |
Alan Cox | 33f0f88 | 2006-01-09 20:54:13 -0800 | [diff] [blame] | 706 | flag = TTY_BREAK; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 707 | if (port->flags & ASYNC_SAK) |
| 708 | do_SAK(tty); |
Jeff Garzik | d61780c | 2005-10-30 15:01:51 -0800 | [diff] [blame] | 709 | |
| 710 | } else if (status & RCSR_PE) |
Alan Cox | 33f0f88 | 2006-01-09 20:54:13 -0800 | [diff] [blame] | 711 | flag = TTY_PARITY; |
Jeff Garzik | d61780c | 2005-10-30 15:01:51 -0800 | [diff] [blame] | 712 | |
| 713 | else if (status & RCSR_FE) |
Alan Cox | 33f0f88 | 2006-01-09 20:54:13 -0800 | [diff] [blame] | 714 | flag = TTY_FRAME; |
Jeff Garzik | d61780c | 2005-10-30 15:01:51 -0800 | [diff] [blame] | 715 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 716 | else if (status & RCSR_OE) |
Alan Cox | 33f0f88 | 2006-01-09 20:54:13 -0800 | [diff] [blame] | 717 | flag = TTY_OVERRUN; |
Jeff Garzik | d61780c | 2005-10-30 15:01:51 -0800 | [diff] [blame] | 718 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 719 | else |
Alan Cox | 33f0f88 | 2006-01-09 20:54:13 -0800 | [diff] [blame] | 720 | flag = TTY_NORMAL; |
Jeff Garzik | d61780c | 2005-10-30 15:01:51 -0800 | [diff] [blame] | 721 | |
Alan Cox | 33f0f88 | 2006-01-09 20:54:13 -0800 | [diff] [blame] | 722 | if(tty_insert_flip_char(tty, ch, flag)) |
| 723 | tty_flip_buffer_push(tty); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 724 | func_exit(); |
| 725 | } |
| 726 | |
| 727 | |
| 728 | static inline void sx_receive(struct specialix_board * bp) |
| 729 | { |
| 730 | struct specialix_port *port; |
| 731 | struct tty_struct *tty; |
| 732 | unsigned char count; |
| 733 | |
| 734 | func_enter(); |
Jeff Garzik | d61780c | 2005-10-30 15:01:51 -0800 | [diff] [blame] | 735 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 736 | if (!(port = sx_get_port(bp, "Receive"))) { |
| 737 | dprintk (SX_DEBUG_RX, "Hmm, couldn't find port.\n"); |
| 738 | func_exit(); |
| 739 | return; |
| 740 | } |
| 741 | tty = port->tty; |
Jeff Garzik | d61780c | 2005-10-30 15:01:51 -0800 | [diff] [blame] | 742 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 743 | count = sx_in(bp, CD186x_RDCR); |
| 744 | dprintk (SX_DEBUG_RX, "port: %p: count: %d\n", port, count); |
| 745 | port->hits[count > 8 ? 9 : count]++; |
Jeff Garzik | d61780c | 2005-10-30 15:01:51 -0800 | [diff] [blame] | 746 | |
Alan Cox | 33f0f88 | 2006-01-09 20:54:13 -0800 | [diff] [blame] | 747 | tty_buffer_request_room(tty, count); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 748 | |
Alan Cox | 33f0f88 | 2006-01-09 20:54:13 -0800 | [diff] [blame] | 749 | while (count--) |
| 750 | tty_insert_flip_char(tty, sx_in(bp, CD186x_RDR), TTY_NORMAL); |
| 751 | tty_flip_buffer_push(tty); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 752 | func_exit(); |
| 753 | } |
| 754 | |
| 755 | |
| 756 | static inline void sx_transmit(struct specialix_board * bp) |
| 757 | { |
| 758 | struct specialix_port *port; |
| 759 | struct tty_struct *tty; |
| 760 | unsigned char count; |
| 761 | |
| 762 | func_enter(); |
| 763 | if (!(port = sx_get_port(bp, "Transmit"))) { |
| 764 | func_exit(); |
| 765 | return; |
| 766 | } |
| 767 | dprintk (SX_DEBUG_TX, "port: %p\n", port); |
| 768 | tty = port->tty; |
Jeff Garzik | d61780c | 2005-10-30 15:01:51 -0800 | [diff] [blame] | 769 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 770 | if (port->IER & IER_TXEMPTY) { |
| 771 | /* FIFO drained */ |
| 772 | sx_out(bp, CD186x_CAR, port_No(port)); |
| 773 | port->IER &= ~IER_TXEMPTY; |
| 774 | sx_out(bp, CD186x_IER, port->IER); |
| 775 | func_exit(); |
| 776 | return; |
| 777 | } |
Jeff Garzik | d61780c | 2005-10-30 15:01:51 -0800 | [diff] [blame] | 778 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 779 | if ((port->xmit_cnt <= 0 && !port->break_length) |
| 780 | || tty->stopped || tty->hw_stopped) { |
| 781 | sx_out(bp, CD186x_CAR, port_No(port)); |
| 782 | port->IER &= ~IER_TXRDY; |
| 783 | sx_out(bp, CD186x_IER, port->IER); |
| 784 | func_exit(); |
| 785 | return; |
| 786 | } |
Jeff Garzik | d61780c | 2005-10-30 15:01:51 -0800 | [diff] [blame] | 787 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 788 | if (port->break_length) { |
| 789 | if (port->break_length > 0) { |
| 790 | if (port->COR2 & COR2_ETC) { |
| 791 | sx_out(bp, CD186x_TDR, CD186x_C_ESC); |
| 792 | sx_out(bp, CD186x_TDR, CD186x_C_SBRK); |
| 793 | port->COR2 &= ~COR2_ETC; |
| 794 | } |
| 795 | count = min_t(int, port->break_length, 0xff); |
| 796 | sx_out(bp, CD186x_TDR, CD186x_C_ESC); |
| 797 | sx_out(bp, CD186x_TDR, CD186x_C_DELAY); |
| 798 | sx_out(bp, CD186x_TDR, count); |
| 799 | if (!(port->break_length -= count)) |
| 800 | port->break_length--; |
| 801 | } else { |
| 802 | sx_out(bp, CD186x_TDR, CD186x_C_ESC); |
| 803 | sx_out(bp, CD186x_TDR, CD186x_C_EBRK); |
| 804 | sx_out(bp, CD186x_COR2, port->COR2); |
| 805 | sx_wait_CCR(bp); |
| 806 | sx_out(bp, CD186x_CCR, CCR_CORCHG2); |
| 807 | port->break_length = 0; |
| 808 | } |
| 809 | |
| 810 | func_exit(); |
| 811 | return; |
| 812 | } |
Jeff Garzik | d61780c | 2005-10-30 15:01:51 -0800 | [diff] [blame] | 813 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 814 | count = CD186x_NFIFO; |
| 815 | do { |
| 816 | sx_out(bp, CD186x_TDR, port->xmit_buf[port->xmit_tail++]); |
| 817 | port->xmit_tail = port->xmit_tail & (SERIAL_XMIT_SIZE-1); |
| 818 | if (--port->xmit_cnt <= 0) |
| 819 | break; |
| 820 | } while (--count > 0); |
Jeff Garzik | d61780c | 2005-10-30 15:01:51 -0800 | [diff] [blame] | 821 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 822 | if (port->xmit_cnt <= 0) { |
| 823 | sx_out(bp, CD186x_CAR, port_No(port)); |
| 824 | port->IER &= ~IER_TXRDY; |
| 825 | sx_out(bp, CD186x_IER, port->IER); |
| 826 | } |
| 827 | if (port->xmit_cnt <= port->wakeup_chars) |
| 828 | sx_mark_event(port, RS_EVENT_WRITE_WAKEUP); |
| 829 | |
| 830 | func_exit(); |
| 831 | } |
| 832 | |
| 833 | |
| 834 | static inline void sx_check_modem(struct specialix_board * bp) |
| 835 | { |
| 836 | struct specialix_port *port; |
| 837 | struct tty_struct *tty; |
| 838 | unsigned char mcr; |
| 839 | int msvr_cd; |
| 840 | |
| 841 | dprintk (SX_DEBUG_SIGNALS, "Modem intr. "); |
| 842 | if (!(port = sx_get_port(bp, "Modem"))) |
| 843 | return; |
Jeff Garzik | d61780c | 2005-10-30 15:01:51 -0800 | [diff] [blame] | 844 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 845 | tty = port->tty; |
Jeff Garzik | d61780c | 2005-10-30 15:01:51 -0800 | [diff] [blame] | 846 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 847 | mcr = sx_in(bp, CD186x_MCR); |
| 848 | printk ("mcr = %02x.\n", mcr); |
| 849 | |
| 850 | if ((mcr & MCR_CDCHG)) { |
| 851 | dprintk (SX_DEBUG_SIGNALS, "CD just changed... "); |
| 852 | msvr_cd = sx_in(bp, CD186x_MSVR) & MSVR_CD; |
| 853 | if (msvr_cd) { |
| 854 | dprintk (SX_DEBUG_SIGNALS, "Waking up guys in open.\n"); |
| 855 | wake_up_interruptible(&port->open_wait); |
| 856 | } else { |
| 857 | dprintk (SX_DEBUG_SIGNALS, "Sending HUP.\n"); |
| 858 | schedule_work(&port->tqueue_hangup); |
| 859 | } |
| 860 | } |
Jeff Garzik | d61780c | 2005-10-30 15:01:51 -0800 | [diff] [blame] | 861 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 862 | #ifdef SPECIALIX_BRAIN_DAMAGED_CTS |
| 863 | if (mcr & MCR_CTSCHG) { |
| 864 | if (sx_in(bp, CD186x_MSVR) & MSVR_CTS) { |
| 865 | tty->hw_stopped = 0; |
| 866 | port->IER |= IER_TXRDY; |
| 867 | if (port->xmit_cnt <= port->wakeup_chars) |
| 868 | sx_mark_event(port, RS_EVENT_WRITE_WAKEUP); |
| 869 | } else { |
| 870 | tty->hw_stopped = 1; |
| 871 | port->IER &= ~IER_TXRDY; |
| 872 | } |
| 873 | sx_out(bp, CD186x_IER, port->IER); |
| 874 | } |
| 875 | if (mcr & MCR_DSSXHG) { |
| 876 | if (sx_in(bp, CD186x_MSVR) & MSVR_DSR) { |
| 877 | tty->hw_stopped = 0; |
| 878 | port->IER |= IER_TXRDY; |
| 879 | if (port->xmit_cnt <= port->wakeup_chars) |
| 880 | sx_mark_event(port, RS_EVENT_WRITE_WAKEUP); |
| 881 | } else { |
| 882 | tty->hw_stopped = 1; |
| 883 | port->IER &= ~IER_TXRDY; |
| 884 | } |
| 885 | sx_out(bp, CD186x_IER, port->IER); |
| 886 | } |
| 887 | #endif /* SPECIALIX_BRAIN_DAMAGED_CTS */ |
Jeff Garzik | d61780c | 2005-10-30 15:01:51 -0800 | [diff] [blame] | 888 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 889 | /* Clear change bits */ |
| 890 | sx_out(bp, CD186x_MCR, 0); |
| 891 | } |
| 892 | |
| 893 | |
| 894 | /* The main interrupt processing routine */ |
David Howells | 7d12e78 | 2006-10-05 14:55:46 +0100 | [diff] [blame] | 895 | static irqreturn_t sx_interrupt(int irq, void *dev_id) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 896 | { |
| 897 | unsigned char status; |
| 898 | unsigned char ack; |
| 899 | struct specialix_board *bp; |
| 900 | unsigned long loop = 0; |
| 901 | int saved_reg; |
| 902 | unsigned long flags; |
| 903 | |
| 904 | func_enter(); |
| 905 | |
| 906 | bp = dev_id; |
| 907 | spin_lock_irqsave(&bp->lock, flags); |
| 908 | |
| 909 | dprintk (SX_DEBUG_FLOW, "enter %s port %d room: %ld\n", __FUNCTION__, port_No(sx_get_port(bp, "INT")), SERIAL_XMIT_SIZE - sx_get_port(bp, "ITN")->xmit_cnt - 1); |
Jeff Garzik | c7bec5a | 2006-10-06 15:00:58 -0400 | [diff] [blame] | 910 | if (!(bp->flags & SX_BOARD_ACTIVE)) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 911 | dprintk (SX_DEBUG_IRQ, "sx: False interrupt. irq %d.\n", irq); |
| 912 | spin_unlock_irqrestore(&bp->lock, flags); |
| 913 | func_exit(); |
| 914 | return IRQ_NONE; |
| 915 | } |
| 916 | |
| 917 | saved_reg = bp->reg; |
| 918 | |
| 919 | while ((++loop < 16) && (status = (sx_in(bp, CD186x_SRSR) & |
| 920 | (SRSR_RREQint | |
| 921 | SRSR_TREQint | |
Jeff Garzik | d61780c | 2005-10-30 15:01:51 -0800 | [diff] [blame] | 922 | SRSR_MREQint)))) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 923 | if (status & SRSR_RREQint) { |
| 924 | ack = sx_in(bp, CD186x_RRAR); |
| 925 | |
| 926 | if (ack == (SX_ID | GIVR_IT_RCV)) |
| 927 | sx_receive(bp); |
| 928 | else if (ack == (SX_ID | GIVR_IT_REXC)) |
| 929 | sx_receive_exc(bp); |
| 930 | else |
| 931 | printk(KERN_ERR "sx%d: status: 0x%x Bad receive ack 0x%02x.\n", |
| 932 | board_No(bp), status, ack); |
Jeff Garzik | d61780c | 2005-10-30 15:01:51 -0800 | [diff] [blame] | 933 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 934 | } else if (status & SRSR_TREQint) { |
| 935 | ack = sx_in(bp, CD186x_TRAR); |
| 936 | |
| 937 | if (ack == (SX_ID | GIVR_IT_TX)) |
| 938 | sx_transmit(bp); |
| 939 | else |
| 940 | printk(KERN_ERR "sx%d: status: 0x%x Bad transmit ack 0x%02x. port: %d\n", |
| 941 | board_No(bp), status, ack, port_No (sx_get_port (bp, "Int"))); |
| 942 | } else if (status & SRSR_MREQint) { |
| 943 | ack = sx_in(bp, CD186x_MRAR); |
| 944 | |
Jeff Garzik | d61780c | 2005-10-30 15:01:51 -0800 | [diff] [blame] | 945 | if (ack == (SX_ID | GIVR_IT_MODEM)) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 946 | sx_check_modem(bp); |
| 947 | else |
| 948 | printk(KERN_ERR "sx%d: status: 0x%x Bad modem ack 0x%02x.\n", |
| 949 | board_No(bp), status, ack); |
Jeff Garzik | d61780c | 2005-10-30 15:01:51 -0800 | [diff] [blame] | 950 | |
| 951 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 952 | |
| 953 | sx_out(bp, CD186x_EOIR, 0); /* Mark end of interrupt */ |
| 954 | } |
| 955 | bp->reg = saved_reg; |
| 956 | outb (bp->reg, bp->base + SX_ADDR_REG); |
| 957 | spin_unlock_irqrestore(&bp->lock, flags); |
| 958 | func_exit(); |
| 959 | return IRQ_HANDLED; |
| 960 | } |
| 961 | |
| 962 | |
| 963 | /* |
| 964 | * Routines for open & close processing. |
| 965 | */ |
| 966 | |
| 967 | static void turn_ints_off (struct specialix_board *bp) |
| 968 | { |
| 969 | unsigned long flags; |
| 970 | |
| 971 | func_enter(); |
| 972 | if (bp->flags & SX_BOARD_IS_PCI) { |
| 973 | /* This was intended for enabeling the interrupt on the |
| 974 | * PCI card. However it seems that it's already enabled |
| 975 | * and as PCI interrupts can be shared, there is no real |
| 976 | * reason to have to turn it off. */ |
| 977 | } |
| 978 | |
| 979 | spin_lock_irqsave(&bp->lock, flags); |
| 980 | (void) sx_in_off (bp, 0); /* Turn off interrupts. */ |
| 981 | spin_unlock_irqrestore(&bp->lock, flags); |
| 982 | |
| 983 | func_exit(); |
| 984 | } |
| 985 | |
| 986 | static void turn_ints_on (struct specialix_board *bp) |
| 987 | { |
| 988 | unsigned long flags; |
| 989 | |
| 990 | func_enter(); |
| 991 | |
| 992 | if (bp->flags & SX_BOARD_IS_PCI) { |
| 993 | /* play with the PCI chip. See comment above. */ |
| 994 | } |
| 995 | spin_lock_irqsave(&bp->lock, flags); |
| 996 | (void) sx_in (bp, 0); /* Turn ON interrupts. */ |
| 997 | spin_unlock_irqrestore(&bp->lock, flags); |
| 998 | |
| 999 | func_exit(); |
| 1000 | } |
| 1001 | |
| 1002 | |
| 1003 | /* Called with disabled interrupts */ |
| 1004 | static inline int sx_setup_board(struct specialix_board * bp) |
| 1005 | { |
| 1006 | int error; |
| 1007 | |
Jeff Garzik | d61780c | 2005-10-30 15:01:51 -0800 | [diff] [blame] | 1008 | if (bp->flags & SX_BOARD_ACTIVE) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1009 | return 0; |
| 1010 | |
| 1011 | if (bp->flags & SX_BOARD_IS_PCI) |
Thomas Gleixner | 0f2ed4c | 2006-07-01 19:29:33 -0700 | [diff] [blame] | 1012 | error = request_irq(bp->irq, sx_interrupt, IRQF_DISABLED | IRQF_SHARED, "specialix IO8+", bp); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1013 | else |
Thomas Gleixner | 0f2ed4c | 2006-07-01 19:29:33 -0700 | [diff] [blame] | 1014 | error = request_irq(bp->irq, sx_interrupt, IRQF_DISABLED, "specialix IO8+", bp); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1015 | |
Jeff Garzik | d61780c | 2005-10-30 15:01:51 -0800 | [diff] [blame] | 1016 | if (error) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1017 | return error; |
| 1018 | |
| 1019 | turn_ints_on (bp); |
| 1020 | bp->flags |= SX_BOARD_ACTIVE; |
| 1021 | |
| 1022 | return 0; |
| 1023 | } |
| 1024 | |
| 1025 | |
| 1026 | /* Called with disabled interrupts */ |
| 1027 | static inline void sx_shutdown_board(struct specialix_board *bp) |
| 1028 | { |
| 1029 | func_enter(); |
| 1030 | |
| 1031 | if (!(bp->flags & SX_BOARD_ACTIVE)) { |
| 1032 | func_exit(); |
| 1033 | return; |
| 1034 | } |
| 1035 | |
| 1036 | bp->flags &= ~SX_BOARD_ACTIVE; |
Jeff Garzik | d61780c | 2005-10-30 15:01:51 -0800 | [diff] [blame] | 1037 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1038 | dprintk (SX_DEBUG_IRQ, "Freeing IRQ%d for board %d.\n", |
| 1039 | bp->irq, board_No (bp)); |
| 1040 | free_irq(bp->irq, bp); |
| 1041 | |
| 1042 | turn_ints_off (bp); |
| 1043 | |
| 1044 | |
| 1045 | func_exit(); |
| 1046 | } |
| 1047 | |
| 1048 | |
| 1049 | /* |
Jeff Garzik | d61780c | 2005-10-30 15:01:51 -0800 | [diff] [blame] | 1050 | * Setting up port characteristics. |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1051 | * Must be called with disabled interrupts |
| 1052 | */ |
| 1053 | static void sx_change_speed(struct specialix_board *bp, struct specialix_port *port) |
| 1054 | { |
| 1055 | struct tty_struct *tty; |
| 1056 | unsigned long baud; |
| 1057 | long tmp; |
| 1058 | unsigned char cor1 = 0, cor3 = 0; |
| 1059 | unsigned char mcor1 = 0, mcor2 = 0; |
| 1060 | static unsigned long again; |
| 1061 | unsigned long flags; |
| 1062 | |
| 1063 | func_enter(); |
| 1064 | |
| 1065 | if (!(tty = port->tty) || !tty->termios) { |
| 1066 | func_exit(); |
| 1067 | return; |
| 1068 | } |
| 1069 | |
| 1070 | port->IER = 0; |
| 1071 | port->COR2 = 0; |
| 1072 | /* Select port on the board */ |
| 1073 | spin_lock_irqsave(&bp->lock, flags); |
| 1074 | sx_out(bp, CD186x_CAR, port_No(port)); |
| 1075 | |
| 1076 | /* The Specialix board doens't implement the RTS lines. |
| 1077 | They are used to set the IRQ level. Don't touch them. */ |
| 1078 | if (SX_CRTSCTS(tty)) |
| 1079 | port->MSVR = MSVR_DTR | (sx_in(bp, CD186x_MSVR) & MSVR_RTS); |
| 1080 | else |
| 1081 | port->MSVR = (sx_in(bp, CD186x_MSVR) & MSVR_RTS); |
| 1082 | spin_unlock_irqrestore(&bp->lock, flags); |
| 1083 | dprintk (SX_DEBUG_TERMIOS, "sx: got MSVR=%02x.\n", port->MSVR); |
Alan Cox | 67cc016 | 2006-09-29 02:01:39 -0700 | [diff] [blame] | 1084 | baud = tty_get_baud_rate(tty); |
Jeff Garzik | d61780c | 2005-10-30 15:01:51 -0800 | [diff] [blame] | 1085 | |
Alan Cox | 67cc016 | 2006-09-29 02:01:39 -0700 | [diff] [blame] | 1086 | if (baud == 38400) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1087 | if ((port->flags & ASYNC_SPD_MASK) == ASYNC_SPD_HI) |
Adrian Bunk | a4bb2cf | 2006-10-17 00:10:00 -0700 | [diff] [blame] | 1088 | baud = 57600; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1089 | if ((port->flags & ASYNC_SPD_MASK) == ASYNC_SPD_VHI) |
Adrian Bunk | a4bb2cf | 2006-10-17 00:10:00 -0700 | [diff] [blame] | 1090 | baud = 115200; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1091 | } |
Jeff Garzik | d61780c | 2005-10-30 15:01:51 -0800 | [diff] [blame] | 1092 | |
Alan Cox | 67cc016 | 2006-09-29 02:01:39 -0700 | [diff] [blame] | 1093 | if (!baud) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1094 | /* Drop DTR & exit */ |
| 1095 | dprintk (SX_DEBUG_TERMIOS, "Dropping DTR... Hmm....\n"); |
| 1096 | if (!SX_CRTSCTS (tty)) { |
| 1097 | port -> MSVR &= ~ MSVR_DTR; |
| 1098 | spin_lock_irqsave(&bp->lock, flags); |
| 1099 | sx_out(bp, CD186x_MSVR, port->MSVR ); |
| 1100 | spin_unlock_irqrestore(&bp->lock, flags); |
Jeff Garzik | d61780c | 2005-10-30 15:01:51 -0800 | [diff] [blame] | 1101 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1102 | else |
| 1103 | dprintk (SX_DEBUG_TERMIOS, "Can't drop DTR: no DTR.\n"); |
| 1104 | return; |
| 1105 | } else { |
| 1106 | /* Set DTR on */ |
| 1107 | if (!SX_CRTSCTS (tty)) { |
| 1108 | port ->MSVR |= MSVR_DTR; |
| 1109 | } |
| 1110 | } |
Jeff Garzik | d61780c | 2005-10-30 15:01:51 -0800 | [diff] [blame] | 1111 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1112 | /* |
Jeff Garzik | d61780c | 2005-10-30 15:01:51 -0800 | [diff] [blame] | 1113 | * Now we must calculate some speed depended things |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1114 | */ |
| 1115 | |
| 1116 | /* Set baud rate for port */ |
| 1117 | tmp = port->custom_divisor ; |
| 1118 | if ( tmp ) |
| 1119 | printk (KERN_INFO "sx%d: Using custom baud rate divisor %ld. \n" |
| 1120 | "This is an untested option, please be carefull.\n", |
| 1121 | port_No (port), tmp); |
| 1122 | else |
Alan Cox | 67cc016 | 2006-09-29 02:01:39 -0700 | [diff] [blame] | 1123 | tmp = (((SX_OSCFREQ + baud/2) / baud + |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1124 | CD186x_TPC/2) / CD186x_TPC); |
| 1125 | |
Jeff Garzik | d61780c | 2005-10-30 15:01:51 -0800 | [diff] [blame] | 1126 | if ((tmp < 0x10) && time_before(again, jiffies)) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1127 | again = jiffies + HZ * 60; |
| 1128 | /* Page 48 of version 2.0 of the CL-CD1865 databook */ |
| 1129 | if (tmp >= 12) { |
| 1130 | printk (KERN_INFO "sx%d: Baud rate divisor is %ld. \n" |
| 1131 | "Performance degradation is possible.\n" |
| 1132 | "Read specialix.txt for more info.\n", |
| 1133 | port_No (port), tmp); |
| 1134 | } else { |
| 1135 | printk (KERN_INFO "sx%d: Baud rate divisor is %ld. \n" |
| 1136 | "Warning: overstressing Cirrus chip. " |
| 1137 | "This might not work.\n" |
Jeff Garzik | d61780c | 2005-10-30 15:01:51 -0800 | [diff] [blame] | 1138 | "Read specialix.txt for more info.\n", |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1139 | port_No (port), tmp); |
| 1140 | } |
| 1141 | } |
| 1142 | spin_lock_irqsave(&bp->lock, flags); |
Jeff Garzik | d61780c | 2005-10-30 15:01:51 -0800 | [diff] [blame] | 1143 | sx_out(bp, CD186x_RBPRH, (tmp >> 8) & 0xff); |
| 1144 | sx_out(bp, CD186x_TBPRH, (tmp >> 8) & 0xff); |
| 1145 | sx_out(bp, CD186x_RBPRL, tmp & 0xff); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1146 | sx_out(bp, CD186x_TBPRL, tmp & 0xff); |
| 1147 | spin_unlock_irqrestore(&bp->lock, flags); |
Adrian Bunk | a4bb2cf | 2006-10-17 00:10:00 -0700 | [diff] [blame] | 1148 | if (port->custom_divisor) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1149 | baud = (SX_OSCFREQ + port->custom_divisor/2) / port->custom_divisor; |
Adrian Bunk | a4bb2cf | 2006-10-17 00:10:00 -0700 | [diff] [blame] | 1150 | baud = (baud + 5) / 10; /* Estimated CPS */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1151 | |
| 1152 | /* Two timer ticks seems enough to wakeup something like SLIP driver */ |
Jeff Garzik | d61780c | 2005-10-30 15:01:51 -0800 | [diff] [blame] | 1153 | tmp = ((baud + HZ/2) / HZ) * 2 - CD186x_NFIFO; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1154 | port->wakeup_chars = (tmp < 0) ? 0 : ((tmp >= SERIAL_XMIT_SIZE) ? |
| 1155 | SERIAL_XMIT_SIZE - 1 : tmp); |
Jeff Garzik | d61780c | 2005-10-30 15:01:51 -0800 | [diff] [blame] | 1156 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1157 | /* Receiver timeout will be transmission time for 1.5 chars */ |
| 1158 | tmp = (SPECIALIX_TPS + SPECIALIX_TPS/2 + baud/2) / baud; |
| 1159 | tmp = (tmp > 0xff) ? 0xff : tmp; |
| 1160 | spin_lock_irqsave(&bp->lock, flags); |
| 1161 | sx_out(bp, CD186x_RTPR, tmp); |
| 1162 | spin_unlock_irqrestore(&bp->lock, flags); |
| 1163 | switch (C_CSIZE(tty)) { |
| 1164 | case CS5: |
| 1165 | cor1 |= COR1_5BITS; |
| 1166 | break; |
| 1167 | case CS6: |
| 1168 | cor1 |= COR1_6BITS; |
| 1169 | break; |
| 1170 | case CS7: |
| 1171 | cor1 |= COR1_7BITS; |
| 1172 | break; |
| 1173 | case CS8: |
| 1174 | cor1 |= COR1_8BITS; |
| 1175 | break; |
| 1176 | } |
Jeff Garzik | d61780c | 2005-10-30 15:01:51 -0800 | [diff] [blame] | 1177 | |
| 1178 | if (C_CSTOPB(tty)) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1179 | cor1 |= COR1_2SB; |
Jeff Garzik | d61780c | 2005-10-30 15:01:51 -0800 | [diff] [blame] | 1180 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1181 | cor1 |= COR1_IGNORE; |
| 1182 | if (C_PARENB(tty)) { |
| 1183 | cor1 |= COR1_NORMPAR; |
Jeff Garzik | d61780c | 2005-10-30 15:01:51 -0800 | [diff] [blame] | 1184 | if (C_PARODD(tty)) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1185 | cor1 |= COR1_ODDP; |
Jeff Garzik | d61780c | 2005-10-30 15:01:51 -0800 | [diff] [blame] | 1186 | if (I_INPCK(tty)) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1187 | cor1 &= ~COR1_IGNORE; |
| 1188 | } |
| 1189 | /* Set marking of some errors */ |
| 1190 | port->mark_mask = RCSR_OE | RCSR_TOUT; |
Jeff Garzik | d61780c | 2005-10-30 15:01:51 -0800 | [diff] [blame] | 1191 | if (I_INPCK(tty)) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1192 | port->mark_mask |= RCSR_FE | RCSR_PE; |
Jeff Garzik | d61780c | 2005-10-30 15:01:51 -0800 | [diff] [blame] | 1193 | if (I_BRKINT(tty) || I_PARMRK(tty)) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1194 | port->mark_mask |= RCSR_BREAK; |
Jeff Garzik | d61780c | 2005-10-30 15:01:51 -0800 | [diff] [blame] | 1195 | if (I_IGNPAR(tty)) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1196 | port->mark_mask &= ~(RCSR_FE | RCSR_PE); |
| 1197 | if (I_IGNBRK(tty)) { |
| 1198 | port->mark_mask &= ~RCSR_BREAK; |
Jeff Garzik | d61780c | 2005-10-30 15:01:51 -0800 | [diff] [blame] | 1199 | if (I_IGNPAR(tty)) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1200 | /* Real raw mode. Ignore all */ |
| 1201 | port->mark_mask &= ~RCSR_OE; |
| 1202 | } |
| 1203 | /* Enable Hardware Flow Control */ |
| 1204 | if (C_CRTSCTS(tty)) { |
| 1205 | #ifdef SPECIALIX_BRAIN_DAMAGED_CTS |
| 1206 | port->IER |= IER_DSR | IER_CTS; |
| 1207 | mcor1 |= MCOR1_DSRZD | MCOR1_CTSZD; |
| 1208 | mcor2 |= MCOR2_DSROD | MCOR2_CTSOD; |
| 1209 | spin_lock_irqsave(&bp->lock, flags); |
| 1210 | tty->hw_stopped = !(sx_in(bp, CD186x_MSVR) & (MSVR_CTS|MSVR_DSR)); |
| 1211 | spin_unlock_irqrestore(&bp->lock, flags); |
| 1212 | #else |
Jeff Garzik | d61780c | 2005-10-30 15:01:51 -0800 | [diff] [blame] | 1213 | port->COR2 |= COR2_CTSAE; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1214 | #endif |
| 1215 | } |
| 1216 | /* Enable Software Flow Control. FIXME: I'm not sure about this */ |
| 1217 | /* Some people reported that it works, but I still doubt it */ |
| 1218 | if (I_IXON(tty)) { |
| 1219 | port->COR2 |= COR2_TXIBE; |
| 1220 | cor3 |= (COR3_FCT | COR3_SCDE); |
| 1221 | if (I_IXANY(tty)) |
| 1222 | port->COR2 |= COR2_IXM; |
| 1223 | spin_lock_irqsave(&bp->lock, flags); |
| 1224 | sx_out(bp, CD186x_SCHR1, START_CHAR(tty)); |
| 1225 | sx_out(bp, CD186x_SCHR2, STOP_CHAR(tty)); |
| 1226 | sx_out(bp, CD186x_SCHR3, START_CHAR(tty)); |
| 1227 | sx_out(bp, CD186x_SCHR4, STOP_CHAR(tty)); |
| 1228 | spin_unlock_irqrestore(&bp->lock, flags); |
| 1229 | } |
| 1230 | if (!C_CLOCAL(tty)) { |
| 1231 | /* Enable CD check */ |
| 1232 | port->IER |= IER_CD; |
| 1233 | mcor1 |= MCOR1_CDZD; |
| 1234 | mcor2 |= MCOR2_CDOD; |
| 1235 | } |
Jeff Garzik | d61780c | 2005-10-30 15:01:51 -0800 | [diff] [blame] | 1236 | |
| 1237 | if (C_CREAD(tty)) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1238 | /* Enable receiver */ |
| 1239 | port->IER |= IER_RXD; |
Jeff Garzik | d61780c | 2005-10-30 15:01:51 -0800 | [diff] [blame] | 1240 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1241 | /* Set input FIFO size (1-8 bytes) */ |
| 1242 | cor3 |= sx_rxfifo; |
| 1243 | /* Setting up CD186x channel registers */ |
| 1244 | spin_lock_irqsave(&bp->lock, flags); |
| 1245 | sx_out(bp, CD186x_COR1, cor1); |
| 1246 | sx_out(bp, CD186x_COR2, port->COR2); |
| 1247 | sx_out(bp, CD186x_COR3, cor3); |
| 1248 | spin_unlock_irqrestore(&bp->lock, flags); |
| 1249 | /* Make CD186x know about registers change */ |
| 1250 | sx_wait_CCR(bp); |
| 1251 | spin_lock_irqsave(&bp->lock, flags); |
| 1252 | sx_out(bp, CD186x_CCR, CCR_CORCHG1 | CCR_CORCHG2 | CCR_CORCHG3); |
| 1253 | /* Setting up modem option registers */ |
| 1254 | dprintk (SX_DEBUG_TERMIOS, "Mcor1 = %02x, mcor2 = %02x.\n", mcor1, mcor2); |
| 1255 | sx_out(bp, CD186x_MCOR1, mcor1); |
| 1256 | sx_out(bp, CD186x_MCOR2, mcor2); |
| 1257 | spin_unlock_irqrestore(&bp->lock, flags); |
| 1258 | /* Enable CD186x transmitter & receiver */ |
| 1259 | sx_wait_CCR(bp); |
| 1260 | spin_lock_irqsave(&bp->lock, flags); |
| 1261 | sx_out(bp, CD186x_CCR, CCR_TXEN | CCR_RXEN); |
| 1262 | /* Enable interrupts */ |
| 1263 | sx_out(bp, CD186x_IER, port->IER); |
| 1264 | /* And finally set the modem lines... */ |
| 1265 | sx_out(bp, CD186x_MSVR, port->MSVR); |
| 1266 | spin_unlock_irqrestore(&bp->lock, flags); |
| 1267 | |
| 1268 | func_exit(); |
| 1269 | } |
| 1270 | |
| 1271 | |
| 1272 | /* Must be called with interrupts enabled */ |
| 1273 | static int sx_setup_port(struct specialix_board *bp, struct specialix_port *port) |
| 1274 | { |
| 1275 | unsigned long flags; |
| 1276 | |
| 1277 | func_enter(); |
| 1278 | |
| 1279 | if (port->flags & ASYNC_INITIALIZED) { |
| 1280 | func_exit(); |
| 1281 | return 0; |
| 1282 | } |
Jeff Garzik | d61780c | 2005-10-30 15:01:51 -0800 | [diff] [blame] | 1283 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1284 | if (!port->xmit_buf) { |
| 1285 | /* We may sleep in get_zeroed_page() */ |
| 1286 | unsigned long tmp; |
Jeff Garzik | d61780c | 2005-10-30 15:01:51 -0800 | [diff] [blame] | 1287 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1288 | if (!(tmp = get_zeroed_page(GFP_KERNEL))) { |
| 1289 | func_exit(); |
| 1290 | return -ENOMEM; |
| 1291 | } |
| 1292 | |
| 1293 | if (port->xmit_buf) { |
| 1294 | free_page(tmp); |
| 1295 | func_exit(); |
| 1296 | return -ERESTARTSYS; |
| 1297 | } |
| 1298 | port->xmit_buf = (unsigned char *) tmp; |
| 1299 | } |
Jeff Garzik | d61780c | 2005-10-30 15:01:51 -0800 | [diff] [blame] | 1300 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1301 | spin_lock_irqsave(&port->lock, flags); |
| 1302 | |
Jeff Garzik | d61780c | 2005-10-30 15:01:51 -0800 | [diff] [blame] | 1303 | if (port->tty) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1304 | clear_bit(TTY_IO_ERROR, &port->tty->flags); |
| 1305 | |
| 1306 | port->xmit_cnt = port->xmit_head = port->xmit_tail = 0; |
| 1307 | sx_change_speed(bp, port); |
| 1308 | port->flags |= ASYNC_INITIALIZED; |
| 1309 | |
| 1310 | spin_unlock_irqrestore(&port->lock, flags); |
| 1311 | |
Jeff Garzik | d61780c | 2005-10-30 15:01:51 -0800 | [diff] [blame] | 1312 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1313 | func_exit(); |
| 1314 | return 0; |
| 1315 | } |
| 1316 | |
| 1317 | |
| 1318 | /* Must be called with interrupts disabled */ |
| 1319 | static void sx_shutdown_port(struct specialix_board *bp, struct specialix_port *port) |
| 1320 | { |
| 1321 | struct tty_struct *tty; |
| 1322 | int i; |
| 1323 | unsigned long flags; |
Jeff Garzik | d61780c | 2005-10-30 15:01:51 -0800 | [diff] [blame] | 1324 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1325 | func_enter(); |
| 1326 | |
| 1327 | if (!(port->flags & ASYNC_INITIALIZED)) { |
| 1328 | func_exit(); |
| 1329 | return; |
| 1330 | } |
Jeff Garzik | d61780c | 2005-10-30 15:01:51 -0800 | [diff] [blame] | 1331 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1332 | if (sx_debug & SX_DEBUG_FIFO) { |
| 1333 | dprintk(SX_DEBUG_FIFO, "sx%d: port %d: %ld overruns, FIFO hits [ ", |
| 1334 | board_No(bp), port_No(port), port->overrun); |
| 1335 | for (i = 0; i < 10; i++) { |
| 1336 | dprintk(SX_DEBUG_FIFO, "%ld ", port->hits[i]); |
| 1337 | } |
| 1338 | dprintk(SX_DEBUG_FIFO, "].\n"); |
| 1339 | } |
| 1340 | |
| 1341 | if (port->xmit_buf) { |
| 1342 | free_page((unsigned long) port->xmit_buf); |
| 1343 | port->xmit_buf = NULL; |
| 1344 | } |
| 1345 | |
| 1346 | /* Select port */ |
| 1347 | spin_lock_irqsave(&bp->lock, flags); |
| 1348 | sx_out(bp, CD186x_CAR, port_No(port)); |
| 1349 | |
| 1350 | if (!(tty = port->tty) || C_HUPCL(tty)) { |
| 1351 | /* Drop DTR */ |
| 1352 | sx_out(bp, CD186x_MSVDTR, 0); |
| 1353 | } |
| 1354 | spin_unlock_irqrestore(&bp->lock, flags); |
| 1355 | /* Reset port */ |
| 1356 | sx_wait_CCR(bp); |
| 1357 | spin_lock_irqsave(&bp->lock, flags); |
| 1358 | sx_out(bp, CD186x_CCR, CCR_SOFTRESET); |
| 1359 | /* Disable all interrupts from this port */ |
| 1360 | port->IER = 0; |
| 1361 | sx_out(bp, CD186x_IER, port->IER); |
| 1362 | spin_unlock_irqrestore(&bp->lock, flags); |
| 1363 | if (tty) |
| 1364 | set_bit(TTY_IO_ERROR, &tty->flags); |
| 1365 | port->flags &= ~ASYNC_INITIALIZED; |
Jeff Garzik | d61780c | 2005-10-30 15:01:51 -0800 | [diff] [blame] | 1366 | |
| 1367 | if (!bp->count) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1368 | sx_shutdown_board(bp); |
| 1369 | func_exit(); |
| 1370 | } |
| 1371 | |
Jeff Garzik | d61780c | 2005-10-30 15:01:51 -0800 | [diff] [blame] | 1372 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1373 | static int block_til_ready(struct tty_struct *tty, struct file * filp, |
| 1374 | struct specialix_port *port) |
| 1375 | { |
| 1376 | DECLARE_WAITQUEUE(wait, current); |
| 1377 | struct specialix_board *bp = port_Board(port); |
| 1378 | int retval; |
| 1379 | int do_clocal = 0; |
| 1380 | int CD; |
| 1381 | unsigned long flags; |
| 1382 | |
| 1383 | func_enter(); |
| 1384 | |
| 1385 | /* |
| 1386 | * If the device is in the middle of being closed, then block |
| 1387 | * until it's done, and then try again. |
| 1388 | */ |
| 1389 | if (tty_hung_up_p(filp) || port->flags & ASYNC_CLOSING) { |
| 1390 | interruptible_sleep_on(&port->close_wait); |
| 1391 | if (port->flags & ASYNC_HUP_NOTIFY) { |
| 1392 | func_exit(); |
| 1393 | return -EAGAIN; |
| 1394 | } else { |
| 1395 | func_exit(); |
| 1396 | return -ERESTARTSYS; |
| 1397 | } |
| 1398 | } |
Jeff Garzik | d61780c | 2005-10-30 15:01:51 -0800 | [diff] [blame] | 1399 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1400 | /* |
| 1401 | * If non-blocking mode is set, or the port is not enabled, |
| 1402 | * then make the check up front and then exit. |
| 1403 | */ |
| 1404 | if ((filp->f_flags & O_NONBLOCK) || |
| 1405 | (tty->flags & (1 << TTY_IO_ERROR))) { |
| 1406 | port->flags |= ASYNC_NORMAL_ACTIVE; |
| 1407 | func_exit(); |
| 1408 | return 0; |
| 1409 | } |
| 1410 | |
| 1411 | if (C_CLOCAL(tty)) |
| 1412 | do_clocal = 1; |
| 1413 | |
| 1414 | /* |
| 1415 | * Block waiting for the carrier detect and the line to become |
| 1416 | * free (i.e., not in use by the callout). While we are in |
| 1417 | * this loop, info->count is dropped by one, so that |
| 1418 | * rs_close() knows when to free things. We restore it upon |
| 1419 | * exit, either normal or abnormal. |
| 1420 | */ |
| 1421 | retval = 0; |
| 1422 | add_wait_queue(&port->open_wait, &wait); |
| 1423 | spin_lock_irqsave(&port->lock, flags); |
| 1424 | if (!tty_hung_up_p(filp)) { |
| 1425 | port->count--; |
| 1426 | } |
| 1427 | spin_unlock_irqrestore(&port->lock, flags); |
| 1428 | port->blocked_open++; |
| 1429 | while (1) { |
| 1430 | spin_lock_irqsave(&bp->lock, flags); |
| 1431 | sx_out(bp, CD186x_CAR, port_No(port)); |
| 1432 | CD = sx_in(bp, CD186x_MSVR) & MSVR_CD; |
| 1433 | if (SX_CRTSCTS (tty)) { |
| 1434 | /* Activate RTS */ |
| 1435 | port->MSVR |= MSVR_DTR; /* WTF? */ |
| 1436 | sx_out (bp, CD186x_MSVR, port->MSVR); |
| 1437 | } else { |
| 1438 | /* Activate DTR */ |
| 1439 | port->MSVR |= MSVR_DTR; |
| 1440 | sx_out (bp, CD186x_MSVR, port->MSVR); |
| 1441 | } |
| 1442 | spin_unlock_irqrestore(&bp->lock, flags); |
| 1443 | set_current_state(TASK_INTERRUPTIBLE); |
| 1444 | if (tty_hung_up_p(filp) || |
| 1445 | !(port->flags & ASYNC_INITIALIZED)) { |
| 1446 | if (port->flags & ASYNC_HUP_NOTIFY) |
| 1447 | retval = -EAGAIN; |
| 1448 | else |
Jeff Garzik | d61780c | 2005-10-30 15:01:51 -0800 | [diff] [blame] | 1449 | retval = -ERESTARTSYS; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1450 | break; |
| 1451 | } |
| 1452 | if (!(port->flags & ASYNC_CLOSING) && |
| 1453 | (do_clocal || CD)) |
| 1454 | break; |
| 1455 | if (signal_pending(current)) { |
| 1456 | retval = -ERESTARTSYS; |
| 1457 | break; |
| 1458 | } |
| 1459 | schedule(); |
| 1460 | } |
| 1461 | |
| 1462 | set_current_state(TASK_RUNNING); |
| 1463 | remove_wait_queue(&port->open_wait, &wait); |
| 1464 | spin_lock_irqsave(&port->lock, flags); |
| 1465 | if (!tty_hung_up_p(filp)) { |
| 1466 | port->count++; |
| 1467 | } |
| 1468 | port->blocked_open--; |
| 1469 | spin_unlock_irqrestore(&port->lock, flags); |
| 1470 | if (retval) { |
| 1471 | func_exit(); |
| 1472 | return retval; |
| 1473 | } |
| 1474 | |
| 1475 | port->flags |= ASYNC_NORMAL_ACTIVE; |
| 1476 | func_exit(); |
| 1477 | return 0; |
Jeff Garzik | d61780c | 2005-10-30 15:01:51 -0800 | [diff] [blame] | 1478 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1479 | |
| 1480 | |
| 1481 | static int sx_open(struct tty_struct * tty, struct file * filp) |
| 1482 | { |
| 1483 | int board; |
| 1484 | int error; |
| 1485 | struct specialix_port * port; |
| 1486 | struct specialix_board * bp; |
| 1487 | int i; |
| 1488 | unsigned long flags; |
| 1489 | |
| 1490 | func_enter(); |
| 1491 | |
| 1492 | board = SX_BOARD(tty->index); |
| 1493 | |
| 1494 | if (board >= SX_NBOARD || !(sx_board[board].flags & SX_BOARD_PRESENT)) { |
| 1495 | func_exit(); |
| 1496 | return -ENODEV; |
| 1497 | } |
Jeff Garzik | d61780c | 2005-10-30 15:01:51 -0800 | [diff] [blame] | 1498 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1499 | bp = &sx_board[board]; |
| 1500 | port = sx_port + board * SX_NPORT + SX_PORT(tty->index); |
| 1501 | port->overrun = 0; |
| 1502 | for (i = 0; i < 10; i++) |
| 1503 | port->hits[i]=0; |
| 1504 | |
| 1505 | dprintk (SX_DEBUG_OPEN, "Board = %d, bp = %p, port = %p, portno = %d.\n", |
| 1506 | board, bp, port, SX_PORT(tty->index)); |
| 1507 | |
| 1508 | if (sx_paranoia_check(port, tty->name, "sx_open")) { |
| 1509 | func_enter(); |
| 1510 | return -ENODEV; |
| 1511 | } |
| 1512 | |
| 1513 | if ((error = sx_setup_board(bp))) { |
| 1514 | func_exit(); |
| 1515 | return error; |
| 1516 | } |
| 1517 | |
| 1518 | spin_lock_irqsave(&bp->lock, flags); |
| 1519 | port->count++; |
| 1520 | bp->count++; |
| 1521 | tty->driver_data = port; |
| 1522 | port->tty = tty; |
| 1523 | spin_unlock_irqrestore(&bp->lock, flags); |
| 1524 | |
| 1525 | if ((error = sx_setup_port(bp, port))) { |
| 1526 | func_enter(); |
| 1527 | return error; |
| 1528 | } |
Jeff Garzik | d61780c | 2005-10-30 15:01:51 -0800 | [diff] [blame] | 1529 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1530 | if ((error = block_til_ready(tty, filp, port))) { |
| 1531 | func_enter(); |
| 1532 | return error; |
| 1533 | } |
| 1534 | |
| 1535 | func_exit(); |
| 1536 | return 0; |
| 1537 | } |
| 1538 | |
| 1539 | |
| 1540 | static void sx_close(struct tty_struct * tty, struct file * filp) |
| 1541 | { |
| 1542 | struct specialix_port *port = (struct specialix_port *) tty->driver_data; |
| 1543 | struct specialix_board *bp; |
| 1544 | unsigned long flags; |
| 1545 | unsigned long timeout; |
Jeff Garzik | d61780c | 2005-10-30 15:01:51 -0800 | [diff] [blame] | 1546 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1547 | func_enter(); |
| 1548 | if (!port || sx_paranoia_check(port, tty->name, "close")) { |
| 1549 | func_exit(); |
| 1550 | return; |
| 1551 | } |
| 1552 | spin_lock_irqsave(&port->lock, flags); |
| 1553 | |
| 1554 | if (tty_hung_up_p(filp)) { |
| 1555 | spin_unlock_irqrestore(&port->lock, flags); |
| 1556 | func_exit(); |
| 1557 | return; |
| 1558 | } |
Jeff Garzik | d61780c | 2005-10-30 15:01:51 -0800 | [diff] [blame] | 1559 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1560 | bp = port_Board(port); |
| 1561 | if ((tty->count == 1) && (port->count != 1)) { |
| 1562 | printk(KERN_ERR "sx%d: sx_close: bad port count;" |
| 1563 | " tty->count is 1, port count is %d\n", |
| 1564 | board_No(bp), port->count); |
| 1565 | port->count = 1; |
| 1566 | } |
| 1567 | |
| 1568 | if (port->count > 1) { |
| 1569 | port->count--; |
| 1570 | bp->count--; |
| 1571 | |
| 1572 | spin_unlock_irqrestore(&port->lock, flags); |
| 1573 | |
| 1574 | func_exit(); |
| 1575 | return; |
| 1576 | } |
| 1577 | port->flags |= ASYNC_CLOSING; |
| 1578 | /* |
Jeff Garzik | d61780c | 2005-10-30 15:01:51 -0800 | [diff] [blame] | 1579 | * Now we wait for the transmit buffer to clear; and we notify |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1580 | * the line discipline to only process XON/XOFF characters. |
| 1581 | */ |
| 1582 | tty->closing = 1; |
| 1583 | spin_unlock_irqrestore(&port->lock, flags); |
| 1584 | dprintk (SX_DEBUG_OPEN, "Closing\n"); |
| 1585 | if (port->closing_wait != ASYNC_CLOSING_WAIT_NONE) { |
| 1586 | tty_wait_until_sent(tty, port->closing_wait); |
| 1587 | } |
| 1588 | /* |
| 1589 | * At this point we stop accepting input. To do this, we |
| 1590 | * disable the receive line status interrupts, and tell the |
| 1591 | * interrupt driver to stop checking the data ready bit in the |
| 1592 | * line status register. |
| 1593 | */ |
| 1594 | dprintk (SX_DEBUG_OPEN, "Closed\n"); |
| 1595 | port->IER &= ~IER_RXD; |
| 1596 | if (port->flags & ASYNC_INITIALIZED) { |
| 1597 | port->IER &= ~IER_TXRDY; |
| 1598 | port->IER |= IER_TXEMPTY; |
| 1599 | spin_lock_irqsave(&bp->lock, flags); |
| 1600 | sx_out(bp, CD186x_CAR, port_No(port)); |
| 1601 | sx_out(bp, CD186x_IER, port->IER); |
| 1602 | spin_unlock_irqrestore(&bp->lock, flags); |
| 1603 | /* |
| 1604 | * Before we drop DTR, make sure the UART transmitter |
| 1605 | * has completely drained; this is especially |
| 1606 | * important if there is a transmit FIFO! |
| 1607 | */ |
| 1608 | timeout = jiffies+HZ; |
| 1609 | while(port->IER & IER_TXEMPTY) { |
| 1610 | set_current_state (TASK_INTERRUPTIBLE); |
| 1611 | msleep_interruptible(jiffies_to_msecs(port->timeout)); |
| 1612 | if (time_after(jiffies, timeout)) { |
| 1613 | printk (KERN_INFO "Timeout waiting for close\n"); |
| 1614 | break; |
| 1615 | } |
| 1616 | } |
| 1617 | |
| 1618 | } |
| 1619 | |
| 1620 | if (--bp->count < 0) { |
| 1621 | printk(KERN_ERR "sx%d: sx_shutdown_port: bad board count: %d port: %d\n", |
| 1622 | board_No(bp), bp->count, tty->index); |
| 1623 | bp->count = 0; |
| 1624 | } |
| 1625 | if (--port->count < 0) { |
| 1626 | printk(KERN_ERR "sx%d: sx_close: bad port count for tty%d: %d\n", |
| 1627 | board_No(bp), port_No(port), port->count); |
| 1628 | port->count = 0; |
| 1629 | } |
| 1630 | |
| 1631 | sx_shutdown_port(bp, port); |
| 1632 | if (tty->driver->flush_buffer) |
| 1633 | tty->driver->flush_buffer(tty); |
| 1634 | tty_ldisc_flush(tty); |
| 1635 | spin_lock_irqsave(&port->lock, flags); |
| 1636 | tty->closing = 0; |
| 1637 | port->event = 0; |
| 1638 | port->tty = NULL; |
| 1639 | spin_unlock_irqrestore(&port->lock, flags); |
| 1640 | if (port->blocked_open) { |
| 1641 | if (port->close_delay) { |
| 1642 | msleep_interruptible(jiffies_to_msecs(port->close_delay)); |
| 1643 | } |
| 1644 | wake_up_interruptible(&port->open_wait); |
| 1645 | } |
| 1646 | port->flags &= ~(ASYNC_NORMAL_ACTIVE|ASYNC_CLOSING); |
| 1647 | wake_up_interruptible(&port->close_wait); |
| 1648 | |
| 1649 | func_exit(); |
| 1650 | } |
| 1651 | |
| 1652 | |
Jeff Garzik | d61780c | 2005-10-30 15:01:51 -0800 | [diff] [blame] | 1653 | static int sx_write(struct tty_struct * tty, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1654 | const unsigned char *buf, int count) |
| 1655 | { |
| 1656 | struct specialix_port *port = (struct specialix_port *)tty->driver_data; |
| 1657 | struct specialix_board *bp; |
| 1658 | int c, total = 0; |
| 1659 | unsigned long flags; |
| 1660 | |
| 1661 | func_enter(); |
| 1662 | if (sx_paranoia_check(port, tty->name, "sx_write")) { |
| 1663 | func_exit(); |
| 1664 | return 0; |
| 1665 | } |
Jeff Garzik | d61780c | 2005-10-30 15:01:51 -0800 | [diff] [blame] | 1666 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1667 | bp = port_Board(port); |
| 1668 | |
Jiri Slaby | 365e022 | 2006-09-30 23:28:11 -0700 | [diff] [blame] | 1669 | if (!port->xmit_buf) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1670 | func_exit(); |
| 1671 | return 0; |
| 1672 | } |
| 1673 | |
| 1674 | while (1) { |
| 1675 | spin_lock_irqsave(&port->lock, flags); |
| 1676 | c = min_t(int, count, min(SERIAL_XMIT_SIZE - port->xmit_cnt - 1, |
| 1677 | SERIAL_XMIT_SIZE - port->xmit_head)); |
| 1678 | if (c <= 0) { |
| 1679 | spin_unlock_irqrestore(&port->lock, flags); |
| 1680 | break; |
| 1681 | } |
| 1682 | memcpy(port->xmit_buf + port->xmit_head, buf, c); |
| 1683 | port->xmit_head = (port->xmit_head + c) & (SERIAL_XMIT_SIZE-1); |
| 1684 | port->xmit_cnt += c; |
| 1685 | spin_unlock_irqrestore(&port->lock, flags); |
| 1686 | |
| 1687 | buf += c; |
| 1688 | count -= c; |
| 1689 | total += c; |
| 1690 | } |
| 1691 | |
| 1692 | spin_lock_irqsave(&bp->lock, flags); |
| 1693 | if (port->xmit_cnt && !tty->stopped && !tty->hw_stopped && |
| 1694 | !(port->IER & IER_TXRDY)) { |
| 1695 | port->IER |= IER_TXRDY; |
| 1696 | sx_out(bp, CD186x_CAR, port_No(port)); |
| 1697 | sx_out(bp, CD186x_IER, port->IER); |
| 1698 | } |
| 1699 | spin_unlock_irqrestore(&bp->lock, flags); |
| 1700 | func_exit(); |
| 1701 | |
| 1702 | return total; |
| 1703 | } |
| 1704 | |
| 1705 | |
| 1706 | static void sx_put_char(struct tty_struct * tty, unsigned char ch) |
| 1707 | { |
| 1708 | struct specialix_port *port = (struct specialix_port *)tty->driver_data; |
| 1709 | unsigned long flags; |
| 1710 | struct specialix_board * bp; |
| 1711 | |
| 1712 | func_enter(); |
| 1713 | |
| 1714 | if (sx_paranoia_check(port, tty->name, "sx_put_char")) { |
| 1715 | func_exit(); |
| 1716 | return; |
| 1717 | } |
| 1718 | dprintk (SX_DEBUG_TX, "check tty: %p %p\n", tty, port->xmit_buf); |
Eric Sesterhenn | 326f28e9 | 2006-06-25 05:48:48 -0700 | [diff] [blame] | 1719 | if (!port->xmit_buf) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1720 | func_exit(); |
| 1721 | return; |
| 1722 | } |
| 1723 | bp = port_Board(port); |
| 1724 | spin_lock_irqsave(&port->lock, flags); |
| 1725 | |
| 1726 | dprintk (SX_DEBUG_TX, "xmit_cnt: %d xmit_buf: %p\n", port->xmit_cnt, port->xmit_buf); |
| 1727 | if ((port->xmit_cnt >= SERIAL_XMIT_SIZE - 1) || (!port->xmit_buf)) { |
| 1728 | spin_unlock_irqrestore(&port->lock, flags); |
| 1729 | dprintk (SX_DEBUG_TX, "Exit size\n"); |
| 1730 | func_exit(); |
| 1731 | return; |
| 1732 | } |
| 1733 | dprintk (SX_DEBUG_TX, "Handle xmit: %p %p\n", port, port->xmit_buf); |
| 1734 | port->xmit_buf[port->xmit_head++] = ch; |
| 1735 | port->xmit_head &= SERIAL_XMIT_SIZE - 1; |
| 1736 | port->xmit_cnt++; |
| 1737 | spin_unlock_irqrestore(&port->lock, flags); |
| 1738 | |
| 1739 | func_exit(); |
| 1740 | } |
| 1741 | |
| 1742 | |
| 1743 | static void sx_flush_chars(struct tty_struct * tty) |
| 1744 | { |
| 1745 | struct specialix_port *port = (struct specialix_port *)tty->driver_data; |
| 1746 | unsigned long flags; |
| 1747 | struct specialix_board * bp = port_Board(port); |
| 1748 | |
| 1749 | func_enter(); |
| 1750 | |
| 1751 | if (sx_paranoia_check(port, tty->name, "sx_flush_chars")) { |
| 1752 | func_exit(); |
| 1753 | return; |
| 1754 | } |
| 1755 | if (port->xmit_cnt <= 0 || tty->stopped || tty->hw_stopped || |
| 1756 | !port->xmit_buf) { |
| 1757 | func_exit(); |
| 1758 | return; |
| 1759 | } |
| 1760 | spin_lock_irqsave(&bp->lock, flags); |
| 1761 | port->IER |= IER_TXRDY; |
| 1762 | sx_out(port_Board(port), CD186x_CAR, port_No(port)); |
| 1763 | sx_out(port_Board(port), CD186x_IER, port->IER); |
| 1764 | spin_unlock_irqrestore(&bp->lock, flags); |
| 1765 | |
| 1766 | func_exit(); |
| 1767 | } |
| 1768 | |
| 1769 | |
| 1770 | static int sx_write_room(struct tty_struct * tty) |
| 1771 | { |
| 1772 | struct specialix_port *port = (struct specialix_port *)tty->driver_data; |
| 1773 | int ret; |
| 1774 | |
| 1775 | func_enter(); |
| 1776 | |
| 1777 | if (sx_paranoia_check(port, tty->name, "sx_write_room")) { |
| 1778 | func_exit(); |
| 1779 | return 0; |
| 1780 | } |
| 1781 | |
| 1782 | ret = SERIAL_XMIT_SIZE - port->xmit_cnt - 1; |
| 1783 | if (ret < 0) |
| 1784 | ret = 0; |
| 1785 | |
| 1786 | func_exit(); |
| 1787 | return ret; |
| 1788 | } |
| 1789 | |
| 1790 | |
| 1791 | static int sx_chars_in_buffer(struct tty_struct *tty) |
| 1792 | { |
| 1793 | struct specialix_port *port = (struct specialix_port *)tty->driver_data; |
| 1794 | |
| 1795 | func_enter(); |
Jeff Garzik | d61780c | 2005-10-30 15:01:51 -0800 | [diff] [blame] | 1796 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1797 | if (sx_paranoia_check(port, tty->name, "sx_chars_in_buffer")) { |
| 1798 | func_exit(); |
| 1799 | return 0; |
| 1800 | } |
| 1801 | func_exit(); |
| 1802 | return port->xmit_cnt; |
| 1803 | } |
| 1804 | |
| 1805 | |
| 1806 | static void sx_flush_buffer(struct tty_struct *tty) |
| 1807 | { |
| 1808 | struct specialix_port *port = (struct specialix_port *)tty->driver_data; |
| 1809 | unsigned long flags; |
| 1810 | struct specialix_board * bp; |
| 1811 | |
| 1812 | func_enter(); |
| 1813 | |
| 1814 | if (sx_paranoia_check(port, tty->name, "sx_flush_buffer")) { |
| 1815 | func_exit(); |
| 1816 | return; |
| 1817 | } |
| 1818 | |
| 1819 | bp = port_Board(port); |
| 1820 | spin_lock_irqsave(&port->lock, flags); |
| 1821 | port->xmit_cnt = port->xmit_head = port->xmit_tail = 0; |
| 1822 | spin_unlock_irqrestore(&port->lock, flags); |
| 1823 | tty_wakeup(tty); |
| 1824 | |
| 1825 | func_exit(); |
| 1826 | } |
| 1827 | |
| 1828 | |
| 1829 | static int sx_tiocmget(struct tty_struct *tty, struct file *file) |
| 1830 | { |
| 1831 | struct specialix_port *port = (struct specialix_port *)tty->driver_data; |
| 1832 | struct specialix_board * bp; |
| 1833 | unsigned char status; |
| 1834 | unsigned int result; |
| 1835 | unsigned long flags; |
| 1836 | |
| 1837 | func_enter(); |
| 1838 | |
| 1839 | if (sx_paranoia_check(port, tty->name, __FUNCTION__)) { |
| 1840 | func_exit(); |
| 1841 | return -ENODEV; |
| 1842 | } |
| 1843 | |
| 1844 | bp = port_Board(port); |
| 1845 | spin_lock_irqsave (&bp->lock, flags); |
| 1846 | sx_out(bp, CD186x_CAR, port_No(port)); |
| 1847 | status = sx_in(bp, CD186x_MSVR); |
| 1848 | spin_unlock_irqrestore(&bp->lock, flags); |
| 1849 | dprintk (SX_DEBUG_INIT, "Got msvr[%d] = %02x, car = %d.\n", |
| 1850 | port_No(port), status, sx_in (bp, CD186x_CAR)); |
| 1851 | dprintk (SX_DEBUG_INIT, "sx_port = %p, port = %p\n", sx_port, port); |
| 1852 | if (SX_CRTSCTS(port->tty)) { |
Jeff Garzik | d61780c | 2005-10-30 15:01:51 -0800 | [diff] [blame] | 1853 | result = /* (status & MSVR_RTS) ? */ TIOCM_DTR /* : 0) */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1854 | | ((status & MSVR_DTR) ? TIOCM_RTS : 0) |
| 1855 | | ((status & MSVR_CD) ? TIOCM_CAR : 0) |
| 1856 | |/* ((status & MSVR_DSR) ? */ TIOCM_DSR /* : 0) */ |
| 1857 | | ((status & MSVR_CTS) ? TIOCM_CTS : 0); |
| 1858 | } else { |
Jeff Garzik | d61780c | 2005-10-30 15:01:51 -0800 | [diff] [blame] | 1859 | result = /* (status & MSVR_RTS) ? */ TIOCM_RTS /* : 0) */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1860 | | ((status & MSVR_DTR) ? TIOCM_DTR : 0) |
| 1861 | | ((status & MSVR_CD) ? TIOCM_CAR : 0) |
| 1862 | |/* ((status & MSVR_DSR) ? */ TIOCM_DSR /* : 0) */ |
| 1863 | | ((status & MSVR_CTS) ? TIOCM_CTS : 0); |
| 1864 | } |
| 1865 | |
| 1866 | func_exit(); |
| 1867 | |
| 1868 | return result; |
| 1869 | } |
| 1870 | |
| 1871 | |
| 1872 | static int sx_tiocmset(struct tty_struct *tty, struct file *file, |
| 1873 | unsigned int set, unsigned int clear) |
| 1874 | { |
| 1875 | struct specialix_port *port = (struct specialix_port *)tty->driver_data; |
| 1876 | unsigned long flags; |
| 1877 | struct specialix_board *bp; |
| 1878 | |
| 1879 | func_enter(); |
| 1880 | |
| 1881 | if (sx_paranoia_check(port, tty->name, __FUNCTION__)) { |
| 1882 | func_exit(); |
| 1883 | return -ENODEV; |
| 1884 | } |
| 1885 | |
| 1886 | bp = port_Board(port); |
| 1887 | |
| 1888 | spin_lock_irqsave(&port->lock, flags); |
| 1889 | /* if (set & TIOCM_RTS) |
| 1890 | port->MSVR |= MSVR_RTS; */ |
| 1891 | /* if (set & TIOCM_DTR) |
| 1892 | port->MSVR |= MSVR_DTR; */ |
| 1893 | |
| 1894 | if (SX_CRTSCTS(port->tty)) { |
| 1895 | if (set & TIOCM_RTS) |
| 1896 | port->MSVR |= MSVR_DTR; |
| 1897 | } else { |
| 1898 | if (set & TIOCM_DTR) |
| 1899 | port->MSVR |= MSVR_DTR; |
| 1900 | } |
| 1901 | |
| 1902 | /* if (clear & TIOCM_RTS) |
| 1903 | port->MSVR &= ~MSVR_RTS; */ |
| 1904 | /* if (clear & TIOCM_DTR) |
| 1905 | port->MSVR &= ~MSVR_DTR; */ |
| 1906 | if (SX_CRTSCTS(port->tty)) { |
| 1907 | if (clear & TIOCM_RTS) |
| 1908 | port->MSVR &= ~MSVR_DTR; |
| 1909 | } else { |
| 1910 | if (clear & TIOCM_DTR) |
| 1911 | port->MSVR &= ~MSVR_DTR; |
| 1912 | } |
| 1913 | spin_lock_irqsave(&bp->lock, flags); |
| 1914 | sx_out(bp, CD186x_CAR, port_No(port)); |
| 1915 | sx_out(bp, CD186x_MSVR, port->MSVR); |
| 1916 | spin_unlock_irqrestore(&bp->lock, flags); |
| 1917 | spin_unlock_irqrestore(&port->lock, flags); |
| 1918 | func_exit(); |
| 1919 | return 0; |
| 1920 | } |
| 1921 | |
| 1922 | |
| 1923 | static inline void sx_send_break(struct specialix_port * port, unsigned long length) |
| 1924 | { |
| 1925 | struct specialix_board *bp = port_Board(port); |
| 1926 | unsigned long flags; |
Jeff Garzik | d61780c | 2005-10-30 15:01:51 -0800 | [diff] [blame] | 1927 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1928 | func_enter(); |
| 1929 | |
| 1930 | spin_lock_irqsave (&port->lock, flags); |
| 1931 | port->break_length = SPECIALIX_TPS / HZ * length; |
| 1932 | port->COR2 |= COR2_ETC; |
| 1933 | port->IER |= IER_TXRDY; |
| 1934 | spin_lock_irqsave(&bp->lock, flags); |
| 1935 | sx_out(bp, CD186x_CAR, port_No(port)); |
| 1936 | sx_out(bp, CD186x_COR2, port->COR2); |
| 1937 | sx_out(bp, CD186x_IER, port->IER); |
| 1938 | spin_unlock_irqrestore(&bp->lock, flags); |
| 1939 | spin_unlock_irqrestore (&port->lock, flags); |
| 1940 | sx_wait_CCR(bp); |
| 1941 | spin_lock_irqsave(&bp->lock, flags); |
| 1942 | sx_out(bp, CD186x_CCR, CCR_CORCHG2); |
| 1943 | spin_unlock_irqrestore(&bp->lock, flags); |
| 1944 | sx_wait_CCR(bp); |
| 1945 | |
| 1946 | func_exit(); |
| 1947 | } |
| 1948 | |
| 1949 | |
| 1950 | static inline int sx_set_serial_info(struct specialix_port * port, |
| 1951 | struct serial_struct __user * newinfo) |
| 1952 | { |
| 1953 | struct serial_struct tmp; |
| 1954 | struct specialix_board *bp = port_Board(port); |
| 1955 | int change_speed; |
| 1956 | |
| 1957 | func_enter(); |
| 1958 | /* |
Jesper Juhl | e49332b | 2005-05-01 08:59:08 -0700 | [diff] [blame] | 1959 | if (!access_ok(VERIFY_READ, (void *) newinfo, sizeof(tmp))) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1960 | func_exit(); |
Jesper Juhl | e49332b | 2005-05-01 08:59:08 -0700 | [diff] [blame] | 1961 | return -EFAULT; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1962 | } |
| 1963 | */ |
| 1964 | if (copy_from_user(&tmp, newinfo, sizeof(tmp))) { |
| 1965 | func_enter(); |
| 1966 | return -EFAULT; |
| 1967 | } |
Jeff Garzik | d61780c | 2005-10-30 15:01:51 -0800 | [diff] [blame] | 1968 | |
| 1969 | #if 0 |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1970 | if ((tmp.irq != bp->irq) || |
| 1971 | (tmp.port != bp->base) || |
| 1972 | (tmp.type != PORT_CIRRUS) || |
| 1973 | (tmp.baud_base != (SX_OSCFREQ + CD186x_TPC/2) / CD186x_TPC) || |
| 1974 | (tmp.custom_divisor != 0) || |
| 1975 | (tmp.xmit_fifo_size != CD186x_NFIFO) || |
| 1976 | (tmp.flags & ~SPECIALIX_LEGAL_FLAGS)) { |
| 1977 | func_exit(); |
| 1978 | return -EINVAL; |
| 1979 | } |
Jeff Garzik | d61780c | 2005-10-30 15:01:51 -0800 | [diff] [blame] | 1980 | #endif |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1981 | |
| 1982 | change_speed = ((port->flags & ASYNC_SPD_MASK) != |
| 1983 | (tmp.flags & ASYNC_SPD_MASK)); |
| 1984 | change_speed |= (tmp.custom_divisor != port->custom_divisor); |
Jeff Garzik | d61780c | 2005-10-30 15:01:51 -0800 | [diff] [blame] | 1985 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1986 | if (!capable(CAP_SYS_ADMIN)) { |
| 1987 | if ((tmp.close_delay != port->close_delay) || |
| 1988 | (tmp.closing_wait != port->closing_wait) || |
| 1989 | ((tmp.flags & ~ASYNC_USR_MASK) != |
| 1990 | (port->flags & ~ASYNC_USR_MASK))) { |
| 1991 | func_exit(); |
| 1992 | return -EPERM; |
| 1993 | } |
| 1994 | port->flags = ((port->flags & ~ASYNC_USR_MASK) | |
| 1995 | (tmp.flags & ASYNC_USR_MASK)); |
| 1996 | port->custom_divisor = tmp.custom_divisor; |
| 1997 | } else { |
| 1998 | port->flags = ((port->flags & ~ASYNC_FLAGS) | |
| 1999 | (tmp.flags & ASYNC_FLAGS)); |
| 2000 | port->close_delay = tmp.close_delay; |
| 2001 | port->closing_wait = tmp.closing_wait; |
| 2002 | port->custom_divisor = tmp.custom_divisor; |
| 2003 | } |
| 2004 | if (change_speed) { |
| 2005 | sx_change_speed(bp, port); |
| 2006 | } |
| 2007 | func_exit(); |
| 2008 | return 0; |
| 2009 | } |
| 2010 | |
| 2011 | |
| 2012 | static inline int sx_get_serial_info(struct specialix_port * port, |
| 2013 | struct serial_struct __user *retinfo) |
| 2014 | { |
| 2015 | struct serial_struct tmp; |
| 2016 | struct specialix_board *bp = port_Board(port); |
Jeff Garzik | d61780c | 2005-10-30 15:01:51 -0800 | [diff] [blame] | 2017 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2018 | func_enter(); |
| 2019 | |
| 2020 | /* |
Jesper Juhl | e49332b | 2005-05-01 08:59:08 -0700 | [diff] [blame] | 2021 | if (!access_ok(VERIFY_WRITE, (void *) retinfo, sizeof(tmp))) |
| 2022 | return -EFAULT; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2023 | */ |
| 2024 | |
| 2025 | memset(&tmp, 0, sizeof(tmp)); |
| 2026 | tmp.type = PORT_CIRRUS; |
| 2027 | tmp.line = port - sx_port; |
| 2028 | tmp.port = bp->base; |
| 2029 | tmp.irq = bp->irq; |
| 2030 | tmp.flags = port->flags; |
| 2031 | tmp.baud_base = (SX_OSCFREQ + CD186x_TPC/2) / CD186x_TPC; |
| 2032 | tmp.close_delay = port->close_delay * HZ/100; |
| 2033 | tmp.closing_wait = port->closing_wait * HZ/100; |
| 2034 | tmp.custom_divisor = port->custom_divisor; |
| 2035 | tmp.xmit_fifo_size = CD186x_NFIFO; |
| 2036 | if (copy_to_user(retinfo, &tmp, sizeof(tmp))) { |
| 2037 | func_exit(); |
| 2038 | return -EFAULT; |
| 2039 | } |
| 2040 | |
| 2041 | func_exit(); |
| 2042 | return 0; |
| 2043 | } |
| 2044 | |
| 2045 | |
Jeff Garzik | d61780c | 2005-10-30 15:01:51 -0800 | [diff] [blame] | 2046 | static int sx_ioctl(struct tty_struct * tty, struct file * filp, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2047 | unsigned int cmd, unsigned long arg) |
| 2048 | { |
| 2049 | struct specialix_port *port = (struct specialix_port *)tty->driver_data; |
| 2050 | int retval; |
| 2051 | void __user *argp = (void __user *)arg; |
| 2052 | |
| 2053 | func_enter(); |
| 2054 | |
| 2055 | if (sx_paranoia_check(port, tty->name, "sx_ioctl")) { |
| 2056 | func_exit(); |
| 2057 | return -ENODEV; |
| 2058 | } |
Jeff Garzik | d61780c | 2005-10-30 15:01:51 -0800 | [diff] [blame] | 2059 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2060 | switch (cmd) { |
| 2061 | case TCSBRK: /* SVID version: non-zero arg --> no break */ |
| 2062 | retval = tty_check_change(tty); |
| 2063 | if (retval) { |
| 2064 | func_exit(); |
| 2065 | return retval; |
| 2066 | } |
| 2067 | tty_wait_until_sent(tty, 0); |
| 2068 | if (!arg) |
| 2069 | sx_send_break(port, HZ/4); /* 1/4 second */ |
| 2070 | return 0; |
| 2071 | case TCSBRKP: /* support for POSIX tcsendbreak() */ |
| 2072 | retval = tty_check_change(tty); |
| 2073 | if (retval) { |
| 2074 | func_exit(); |
| 2075 | return retval; |
| 2076 | } |
| 2077 | tty_wait_until_sent(tty, 0); |
| 2078 | sx_send_break(port, arg ? arg*(HZ/10) : HZ/4); |
| 2079 | func_exit(); |
| 2080 | return 0; |
| 2081 | case TIOCGSOFTCAR: |
| 2082 | if (put_user(C_CLOCAL(tty)?1:0, (unsigned long __user *)argp)) { |
| 2083 | func_exit(); |
| 2084 | return -EFAULT; |
| 2085 | } |
| 2086 | func_exit(); |
| 2087 | return 0; |
| 2088 | case TIOCSSOFTCAR: |
| 2089 | if (get_user(arg, (unsigned long __user *) argp)) { |
| 2090 | func_exit(); |
| 2091 | return -EFAULT; |
| 2092 | } |
| 2093 | tty->termios->c_cflag = |
| 2094 | ((tty->termios->c_cflag & ~CLOCAL) | |
| 2095 | (arg ? CLOCAL : 0)); |
| 2096 | func_exit(); |
| 2097 | return 0; |
| 2098 | case TIOCGSERIAL: |
| 2099 | func_exit(); |
| 2100 | return sx_get_serial_info(port, argp); |
Jeff Garzik | d61780c | 2005-10-30 15:01:51 -0800 | [diff] [blame] | 2101 | case TIOCSSERIAL: |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2102 | func_exit(); |
| 2103 | return sx_set_serial_info(port, argp); |
| 2104 | default: |
| 2105 | func_exit(); |
| 2106 | return -ENOIOCTLCMD; |
| 2107 | } |
| 2108 | func_exit(); |
| 2109 | return 0; |
| 2110 | } |
| 2111 | |
| 2112 | |
| 2113 | static void sx_throttle(struct tty_struct * tty) |
| 2114 | { |
| 2115 | struct specialix_port *port = (struct specialix_port *)tty->driver_data; |
| 2116 | struct specialix_board *bp; |
| 2117 | unsigned long flags; |
| 2118 | |
| 2119 | func_enter(); |
| 2120 | |
| 2121 | if (sx_paranoia_check(port, tty->name, "sx_throttle")) { |
| 2122 | func_exit(); |
| 2123 | return; |
| 2124 | } |
Jeff Garzik | d61780c | 2005-10-30 15:01:51 -0800 | [diff] [blame] | 2125 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2126 | bp = port_Board(port); |
Jeff Garzik | d61780c | 2005-10-30 15:01:51 -0800 | [diff] [blame] | 2127 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2128 | /* Use DTR instead of RTS ! */ |
Jeff Garzik | d61780c | 2005-10-30 15:01:51 -0800 | [diff] [blame] | 2129 | if (SX_CRTSCTS (tty)) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2130 | port->MSVR &= ~MSVR_DTR; |
| 2131 | else { |
| 2132 | /* Auch!!! I think the system shouldn't call this then. */ |
| 2133 | /* Or maybe we're supposed (allowed?) to do our side of hw |
Jeff Garzik | d61780c | 2005-10-30 15:01:51 -0800 | [diff] [blame] | 2134 | handshake anyway, even when hardware handshake is off. |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2135 | When you see this in your logs, please report.... */ |
| 2136 | printk (KERN_ERR "sx%d: Need to throttle, but can't (hardware hs is off)\n", |
| 2137 | port_No (port)); |
| 2138 | } |
| 2139 | spin_lock_irqsave(&bp->lock, flags); |
| 2140 | sx_out(bp, CD186x_CAR, port_No(port)); |
| 2141 | spin_unlock_irqrestore(&bp->lock, flags); |
| 2142 | if (I_IXOFF(tty)) { |
| 2143 | spin_unlock_irqrestore(&bp->lock, flags); |
| 2144 | sx_wait_CCR(bp); |
| 2145 | spin_lock_irqsave(&bp->lock, flags); |
| 2146 | sx_out(bp, CD186x_CCR, CCR_SSCH2); |
| 2147 | spin_unlock_irqrestore(&bp->lock, flags); |
| 2148 | sx_wait_CCR(bp); |
| 2149 | } |
| 2150 | spin_lock_irqsave(&bp->lock, flags); |
| 2151 | sx_out(bp, CD186x_MSVR, port->MSVR); |
| 2152 | spin_unlock_irqrestore(&bp->lock, flags); |
| 2153 | |
| 2154 | func_exit(); |
| 2155 | } |
| 2156 | |
| 2157 | |
| 2158 | static void sx_unthrottle(struct tty_struct * tty) |
| 2159 | { |
| 2160 | struct specialix_port *port = (struct specialix_port *)tty->driver_data; |
| 2161 | struct specialix_board *bp; |
| 2162 | unsigned long flags; |
| 2163 | |
| 2164 | func_enter(); |
Jeff Garzik | d61780c | 2005-10-30 15:01:51 -0800 | [diff] [blame] | 2165 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2166 | if (sx_paranoia_check(port, tty->name, "sx_unthrottle")) { |
| 2167 | func_exit(); |
| 2168 | return; |
| 2169 | } |
Jeff Garzik | d61780c | 2005-10-30 15:01:51 -0800 | [diff] [blame] | 2170 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2171 | bp = port_Board(port); |
Jeff Garzik | d61780c | 2005-10-30 15:01:51 -0800 | [diff] [blame] | 2172 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2173 | spin_lock_irqsave(&port->lock, flags); |
| 2174 | /* XXXX Use DTR INSTEAD???? */ |
| 2175 | if (SX_CRTSCTS(tty)) { |
| 2176 | port->MSVR |= MSVR_DTR; |
| 2177 | } /* Else clause: see remark in "sx_throttle"... */ |
| 2178 | spin_lock_irqsave(&bp->lock, flags); |
| 2179 | sx_out(bp, CD186x_CAR, port_No(port)); |
| 2180 | spin_unlock_irqrestore(&bp->lock, flags); |
| 2181 | if (I_IXOFF(tty)) { |
| 2182 | spin_unlock_irqrestore(&port->lock, flags); |
| 2183 | sx_wait_CCR(bp); |
| 2184 | spin_lock_irqsave(&bp->lock, flags); |
| 2185 | sx_out(bp, CD186x_CCR, CCR_SSCH1); |
| 2186 | spin_unlock_irqrestore(&bp->lock, flags); |
| 2187 | sx_wait_CCR(bp); |
| 2188 | spin_lock_irqsave(&port->lock, flags); |
| 2189 | } |
| 2190 | spin_lock_irqsave(&bp->lock, flags); |
| 2191 | sx_out(bp, CD186x_MSVR, port->MSVR); |
| 2192 | spin_unlock_irqrestore(&bp->lock, flags); |
| 2193 | spin_unlock_irqrestore(&port->lock, flags); |
| 2194 | |
| 2195 | func_exit(); |
| 2196 | } |
| 2197 | |
| 2198 | |
| 2199 | static void sx_stop(struct tty_struct * tty) |
| 2200 | { |
| 2201 | struct specialix_port *port = (struct specialix_port *)tty->driver_data; |
| 2202 | struct specialix_board *bp; |
| 2203 | unsigned long flags; |
| 2204 | |
| 2205 | func_enter(); |
Jeff Garzik | d61780c | 2005-10-30 15:01:51 -0800 | [diff] [blame] | 2206 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2207 | if (sx_paranoia_check(port, tty->name, "sx_stop")) { |
| 2208 | func_exit(); |
| 2209 | return; |
| 2210 | } |
| 2211 | |
| 2212 | bp = port_Board(port); |
Jeff Garzik | d61780c | 2005-10-30 15:01:51 -0800 | [diff] [blame] | 2213 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2214 | spin_lock_irqsave(&port->lock, flags); |
| 2215 | port->IER &= ~IER_TXRDY; |
| 2216 | spin_lock_irqsave(&bp->lock, flags); |
| 2217 | sx_out(bp, CD186x_CAR, port_No(port)); |
| 2218 | sx_out(bp, CD186x_IER, port->IER); |
| 2219 | spin_unlock_irqrestore(&bp->lock, flags); |
| 2220 | spin_unlock_irqrestore(&port->lock, flags); |
| 2221 | |
| 2222 | func_exit(); |
| 2223 | } |
| 2224 | |
| 2225 | |
| 2226 | static void sx_start(struct tty_struct * tty) |
| 2227 | { |
| 2228 | struct specialix_port *port = (struct specialix_port *)tty->driver_data; |
| 2229 | struct specialix_board *bp; |
| 2230 | unsigned long flags; |
| 2231 | |
| 2232 | func_enter(); |
Jeff Garzik | d61780c | 2005-10-30 15:01:51 -0800 | [diff] [blame] | 2233 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2234 | if (sx_paranoia_check(port, tty->name, "sx_start")) { |
| 2235 | func_exit(); |
| 2236 | return; |
| 2237 | } |
Jeff Garzik | d61780c | 2005-10-30 15:01:51 -0800 | [diff] [blame] | 2238 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2239 | bp = port_Board(port); |
Jeff Garzik | d61780c | 2005-10-30 15:01:51 -0800 | [diff] [blame] | 2240 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2241 | spin_lock_irqsave(&port->lock, flags); |
| 2242 | if (port->xmit_cnt && port->xmit_buf && !(port->IER & IER_TXRDY)) { |
| 2243 | port->IER |= IER_TXRDY; |
| 2244 | spin_lock_irqsave(&bp->lock, flags); |
| 2245 | sx_out(bp, CD186x_CAR, port_No(port)); |
| 2246 | sx_out(bp, CD186x_IER, port->IER); |
| 2247 | spin_unlock_irqrestore(&bp->lock, flags); |
| 2248 | } |
| 2249 | spin_unlock_irqrestore(&port->lock, flags); |
| 2250 | |
| 2251 | func_exit(); |
| 2252 | } |
| 2253 | |
| 2254 | |
| 2255 | /* |
| 2256 | * This routine is called from the work-queue when the interrupt |
| 2257 | * routine has signalled that a hangup has occurred. The path of |
| 2258 | * hangup processing is: |
| 2259 | * |
| 2260 | * serial interrupt routine -> (workqueue) -> |
| 2261 | * do_sx_hangup() -> tty->hangup() -> sx_hangup() |
Jeff Garzik | d61780c | 2005-10-30 15:01:51 -0800 | [diff] [blame] | 2262 | * |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2263 | */ |
David Howells | c402895 | 2006-11-22 14:57:56 +0000 | [diff] [blame] | 2264 | static void do_sx_hangup(struct work_struct *work) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2265 | { |
David Howells | c402895 | 2006-11-22 14:57:56 +0000 | [diff] [blame] | 2266 | struct specialix_port *port = |
| 2267 | container_of(work, struct specialix_port, tqueue_hangup); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2268 | struct tty_struct *tty; |
Jeff Garzik | d61780c | 2005-10-30 15:01:51 -0800 | [diff] [blame] | 2269 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2270 | func_enter(); |
| 2271 | |
| 2272 | tty = port->tty; |
| 2273 | if (tty) |
| 2274 | tty_hangup(tty); /* FIXME: module removal race here */ |
| 2275 | |
| 2276 | func_exit(); |
| 2277 | } |
| 2278 | |
| 2279 | |
| 2280 | static void sx_hangup(struct tty_struct * tty) |
| 2281 | { |
| 2282 | struct specialix_port *port = (struct specialix_port *)tty->driver_data; |
| 2283 | struct specialix_board *bp; |
| 2284 | unsigned long flags; |
| 2285 | |
| 2286 | func_enter(); |
| 2287 | |
| 2288 | if (sx_paranoia_check(port, tty->name, "sx_hangup")) { |
| 2289 | func_exit(); |
| 2290 | return; |
| 2291 | } |
Jeff Garzik | d61780c | 2005-10-30 15:01:51 -0800 | [diff] [blame] | 2292 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2293 | bp = port_Board(port); |
Jeff Garzik | d61780c | 2005-10-30 15:01:51 -0800 | [diff] [blame] | 2294 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2295 | sx_shutdown_port(bp, port); |
| 2296 | spin_lock_irqsave(&port->lock, flags); |
| 2297 | port->event = 0; |
| 2298 | bp->count -= port->count; |
| 2299 | if (bp->count < 0) { |
| 2300 | printk(KERN_ERR "sx%d: sx_hangup: bad board count: %d port: %d\n", |
| 2301 | board_No(bp), bp->count, tty->index); |
| 2302 | bp->count = 0; |
| 2303 | } |
| 2304 | port->count = 0; |
| 2305 | port->flags &= ~ASYNC_NORMAL_ACTIVE; |
| 2306 | port->tty = NULL; |
| 2307 | spin_unlock_irqrestore(&port->lock, flags); |
| 2308 | wake_up_interruptible(&port->open_wait); |
| 2309 | |
| 2310 | func_exit(); |
| 2311 | } |
| 2312 | |
| 2313 | |
Alan Cox | 606d099 | 2006-12-08 02:38:45 -0800 | [diff] [blame] | 2314 | static void sx_set_termios(struct tty_struct * tty, struct ktermios * old_termios) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2315 | { |
| 2316 | struct specialix_port *port = (struct specialix_port *)tty->driver_data; |
| 2317 | unsigned long flags; |
| 2318 | struct specialix_board * bp; |
Jeff Garzik | d61780c | 2005-10-30 15:01:51 -0800 | [diff] [blame] | 2319 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2320 | if (sx_paranoia_check(port, tty->name, "sx_set_termios")) |
| 2321 | return; |
Jeff Garzik | d61780c | 2005-10-30 15:01:51 -0800 | [diff] [blame] | 2322 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2323 | if (tty->termios->c_cflag == old_termios->c_cflag && |
| 2324 | tty->termios->c_iflag == old_termios->c_iflag) |
| 2325 | return; |
| 2326 | |
| 2327 | bp = port_Board(port); |
| 2328 | spin_lock_irqsave(&port->lock, flags); |
| 2329 | sx_change_speed(port_Board(port), port); |
| 2330 | spin_unlock_irqrestore(&port->lock, flags); |
| 2331 | |
| 2332 | if ((old_termios->c_cflag & CRTSCTS) && |
| 2333 | !(tty->termios->c_cflag & CRTSCTS)) { |
| 2334 | tty->hw_stopped = 0; |
| 2335 | sx_start(tty); |
| 2336 | } |
| 2337 | } |
| 2338 | |
| 2339 | |
David Howells | c402895 | 2006-11-22 14:57:56 +0000 | [diff] [blame] | 2340 | static void do_softint(struct work_struct *work) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2341 | { |
David Howells | c402895 | 2006-11-22 14:57:56 +0000 | [diff] [blame] | 2342 | struct specialix_port *port = |
| 2343 | container_of(work, struct specialix_port, tqueue); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2344 | struct tty_struct *tty; |
| 2345 | |
| 2346 | func_enter(); |
| 2347 | |
| 2348 | if(!(tty = port->tty)) { |
| 2349 | func_exit(); |
| 2350 | return; |
| 2351 | } |
| 2352 | |
| 2353 | if (test_and_clear_bit(RS_EVENT_WRITE_WAKEUP, &port->event)) { |
| 2354 | tty_wakeup(tty); |
| 2355 | //wake_up_interruptible(&tty->write_wait); |
| 2356 | } |
| 2357 | |
| 2358 | func_exit(); |
| 2359 | } |
| 2360 | |
Jeff Dike | b68e31d | 2006-10-02 02:17:18 -0700 | [diff] [blame] | 2361 | static const struct tty_operations sx_ops = { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2362 | .open = sx_open, |
| 2363 | .close = sx_close, |
| 2364 | .write = sx_write, |
| 2365 | .put_char = sx_put_char, |
| 2366 | .flush_chars = sx_flush_chars, |
| 2367 | .write_room = sx_write_room, |
| 2368 | .chars_in_buffer = sx_chars_in_buffer, |
| 2369 | .flush_buffer = sx_flush_buffer, |
| 2370 | .ioctl = sx_ioctl, |
| 2371 | .throttle = sx_throttle, |
| 2372 | .unthrottle = sx_unthrottle, |
| 2373 | .set_termios = sx_set_termios, |
| 2374 | .stop = sx_stop, |
| 2375 | .start = sx_start, |
| 2376 | .hangup = sx_hangup, |
| 2377 | .tiocmget = sx_tiocmget, |
| 2378 | .tiocmset = sx_tiocmset, |
| 2379 | }; |
| 2380 | |
| 2381 | static int sx_init_drivers(void) |
| 2382 | { |
| 2383 | int error; |
| 2384 | int i; |
| 2385 | |
| 2386 | func_enter(); |
| 2387 | |
| 2388 | specialix_driver = alloc_tty_driver(SX_NBOARD * SX_NPORT); |
| 2389 | if (!specialix_driver) { |
| 2390 | printk(KERN_ERR "sx: Couldn't allocate tty_driver.\n"); |
| 2391 | func_exit(); |
| 2392 | return 1; |
| 2393 | } |
Jeff Garzik | d61780c | 2005-10-30 15:01:51 -0800 | [diff] [blame] | 2394 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2395 | specialix_driver->owner = THIS_MODULE; |
| 2396 | specialix_driver->name = "ttyW"; |
| 2397 | specialix_driver->major = SPECIALIX_NORMAL_MAJOR; |
| 2398 | specialix_driver->type = TTY_DRIVER_TYPE_SERIAL; |
| 2399 | specialix_driver->subtype = SERIAL_TYPE_NORMAL; |
| 2400 | specialix_driver->init_termios = tty_std_termios; |
| 2401 | specialix_driver->init_termios.c_cflag = |
| 2402 | B9600 | CS8 | CREAD | HUPCL | CLOCAL; |
Alan Cox | 606d099 | 2006-12-08 02:38:45 -0800 | [diff] [blame] | 2403 | specialix_driver->init_termios.c_ispeed = 9600; |
| 2404 | specialix_driver->init_termios.c_ospeed = 9600; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2405 | specialix_driver->flags = TTY_DRIVER_REAL_RAW; |
| 2406 | tty_set_operations(specialix_driver, &sx_ops); |
| 2407 | |
| 2408 | if ((error = tty_register_driver(specialix_driver))) { |
| 2409 | put_tty_driver(specialix_driver); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2410 | printk(KERN_ERR "sx: Couldn't register specialix IO8+ driver, error = %d\n", |
| 2411 | error); |
| 2412 | func_exit(); |
| 2413 | return 1; |
| 2414 | } |
| 2415 | memset(sx_port, 0, sizeof(sx_port)); |
| 2416 | for (i = 0; i < SX_NPORT * SX_NBOARD; i++) { |
| 2417 | sx_port[i].magic = SPECIALIX_MAGIC; |
David Howells | c402895 | 2006-11-22 14:57:56 +0000 | [diff] [blame] | 2418 | INIT_WORK(&sx_port[i].tqueue, do_softint); |
| 2419 | INIT_WORK(&sx_port[i].tqueue_hangup, do_sx_hangup); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2420 | sx_port[i].close_delay = 50 * HZ/100; |
| 2421 | sx_port[i].closing_wait = 3000 * HZ/100; |
| 2422 | init_waitqueue_head(&sx_port[i].open_wait); |
| 2423 | init_waitqueue_head(&sx_port[i].close_wait); |
| 2424 | spin_lock_init(&sx_port[i].lock); |
| 2425 | } |
Jeff Garzik | d61780c | 2005-10-30 15:01:51 -0800 | [diff] [blame] | 2426 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2427 | func_exit(); |
| 2428 | return 0; |
| 2429 | } |
| 2430 | |
| 2431 | static void sx_release_drivers(void) |
| 2432 | { |
| 2433 | func_enter(); |
| 2434 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2435 | tty_unregister_driver(specialix_driver); |
| 2436 | put_tty_driver(specialix_driver); |
| 2437 | func_exit(); |
| 2438 | } |
| 2439 | |
Jeff Garzik | d61780c | 2005-10-30 15:01:51 -0800 | [diff] [blame] | 2440 | /* |
| 2441 | * This routine must be called by kernel at boot time |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2442 | */ |
| 2443 | static int __init specialix_init(void) |
| 2444 | { |
| 2445 | int i; |
| 2446 | int found = 0; |
| 2447 | |
| 2448 | func_enter(); |
| 2449 | |
| 2450 | printk(KERN_INFO "sx: Specialix IO8+ driver v" VERSION ", (c) R.E.Wolff 1997/1998.\n"); |
| 2451 | printk(KERN_INFO "sx: derived from work (c) D.Gorodchanin 1994-1996.\n"); |
| 2452 | #ifdef CONFIG_SPECIALIX_RTSCTS |
| 2453 | printk (KERN_INFO "sx: DTR/RTS pin is always RTS.\n"); |
| 2454 | #else |
| 2455 | printk (KERN_INFO "sx: DTR/RTS pin is RTS when CRTSCTS is on.\n"); |
| 2456 | #endif |
Jeff Garzik | d61780c | 2005-10-30 15:01:51 -0800 | [diff] [blame] | 2457 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2458 | for (i = 0; i < SX_NBOARD; i++) |
Ingo Molnar | 34af946 | 2006-06-27 02:53:55 -0700 | [diff] [blame] | 2459 | spin_lock_init(&sx_board[i].lock); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2460 | |
| 2461 | if (sx_init_drivers()) { |
| 2462 | func_exit(); |
| 2463 | return -EIO; |
| 2464 | } |
| 2465 | |
Jeff Garzik | d61780c | 2005-10-30 15:01:51 -0800 | [diff] [blame] | 2466 | for (i = 0; i < SX_NBOARD; i++) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2467 | if (sx_board[i].base && !sx_probe(&sx_board[i])) |
| 2468 | found++; |
| 2469 | |
| 2470 | #ifdef CONFIG_PCI |
| 2471 | { |
| 2472 | struct pci_dev *pdev = NULL; |
| 2473 | |
| 2474 | i=0; |
| 2475 | while (i < SX_NBOARD) { |
| 2476 | if (sx_board[i].flags & SX_BOARD_PRESENT) { |
| 2477 | i++; |
| 2478 | continue; |
| 2479 | } |
Alan Cox | 606d099 | 2006-12-08 02:38:45 -0800 | [diff] [blame] | 2480 | pdev = pci_get_device (PCI_VENDOR_ID_SPECIALIX, |
Jeff Garzik | d61780c | 2005-10-30 15:01:51 -0800 | [diff] [blame] | 2481 | PCI_DEVICE_ID_SPECIALIX_IO8, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2482 | pdev); |
| 2483 | if (!pdev) break; |
| 2484 | |
| 2485 | if (pci_enable_device(pdev)) |
| 2486 | continue; |
| 2487 | |
| 2488 | sx_board[i].irq = pdev->irq; |
| 2489 | |
| 2490 | sx_board[i].base = pci_resource_start (pdev, 2); |
| 2491 | |
| 2492 | sx_board[i].flags |= SX_BOARD_IS_PCI; |
| 2493 | if (!sx_probe(&sx_board[i])) |
| 2494 | found ++; |
| 2495 | } |
Alan Cox | 606d099 | 2006-12-08 02:38:45 -0800 | [diff] [blame] | 2496 | /* May exit pci_get sequence early with lots of boards */ |
| 2497 | if (pdev != NULL) |
| 2498 | pci_dev_put(pdev); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2499 | } |
| 2500 | #endif |
| 2501 | |
| 2502 | if (!found) { |
| 2503 | sx_release_drivers(); |
| 2504 | printk(KERN_INFO "sx: No specialix IO8+ boards detected.\n"); |
| 2505 | func_exit(); |
| 2506 | return -EIO; |
| 2507 | } |
| 2508 | |
| 2509 | func_exit(); |
| 2510 | return 0; |
| 2511 | } |
| 2512 | |
| 2513 | static int iobase[SX_NBOARD] = {0,}; |
| 2514 | |
| 2515 | static int irq [SX_NBOARD] = {0,}; |
| 2516 | |
| 2517 | module_param_array(iobase, int, NULL, 0); |
| 2518 | module_param_array(irq, int, NULL, 0); |
| 2519 | module_param(sx_debug, int, 0); |
| 2520 | module_param(sx_rxfifo, int, 0); |
| 2521 | #ifdef SPECIALIX_TIMER |
| 2522 | module_param(sx_poll, int, 0); |
| 2523 | #endif |
| 2524 | |
| 2525 | /* |
| 2526 | * You can setup up to 4 boards. |
| 2527 | * by specifying "iobase=0xXXX,0xXXX ..." as insmod parameter. |
Jeff Garzik | d61780c | 2005-10-30 15:01:51 -0800 | [diff] [blame] | 2528 | * You should specify the IRQs too in that case "irq=....,...". |
| 2529 | * |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2530 | * More than 4 boards in one computer is not possible, as the card can |
Jeff Garzik | d61780c | 2005-10-30 15:01:51 -0800 | [diff] [blame] | 2531 | * only use 4 different interrupts. |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2532 | * |
| 2533 | */ |
| 2534 | static int __init specialix_init_module(void) |
| 2535 | { |
| 2536 | int i; |
| 2537 | |
| 2538 | func_enter(); |
| 2539 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2540 | if (iobase[0] || iobase[1] || iobase[2] || iobase[3]) { |
| 2541 | for(i = 0; i < SX_NBOARD; i++) { |
| 2542 | sx_board[i].base = iobase[i]; |
| 2543 | sx_board[i].irq = irq[i]; |
| 2544 | sx_board[i].count= 0; |
| 2545 | } |
| 2546 | } |
| 2547 | |
| 2548 | func_exit(); |
| 2549 | |
| 2550 | return specialix_init(); |
| 2551 | } |
Jeff Garzik | d61780c | 2005-10-30 15:01:51 -0800 | [diff] [blame] | 2552 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2553 | static void __exit specialix_exit_module(void) |
| 2554 | { |
| 2555 | int i; |
Jeff Garzik | d61780c | 2005-10-30 15:01:51 -0800 | [diff] [blame] | 2556 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2557 | func_enter(); |
| 2558 | |
| 2559 | sx_release_drivers(); |
| 2560 | for (i = 0; i < SX_NBOARD; i++) |
Jeff Garzik | d61780c | 2005-10-30 15:01:51 -0800 | [diff] [blame] | 2561 | if (sx_board[i].flags & SX_BOARD_PRESENT) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2562 | sx_release_io_range(&sx_board[i]); |
| 2563 | #ifdef SPECIALIX_TIMER |
| 2564 | del_timer (&missed_irq_timer); |
| 2565 | #endif |
| 2566 | |
| 2567 | func_exit(); |
| 2568 | } |
| 2569 | |
Chuck Short | 7691030b | 2006-07-10 04:43:59 -0700 | [diff] [blame] | 2570 | static struct pci_device_id specialx_pci_tbl[] __devinitdata = { |
| 2571 | { PCI_DEVICE(PCI_VENDOR_ID_SPECIALIX, PCI_DEVICE_ID_SPECIALIX_IO8) }, |
| 2572 | { } |
| 2573 | }; |
| 2574 | MODULE_DEVICE_TABLE(pci, specialx_pci_tbl); |
| 2575 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2576 | module_init(specialix_init_module); |
| 2577 | module_exit(specialix_exit_module); |
| 2578 | |
| 2579 | MODULE_LICENSE("GPL"); |