Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1 | /* |
| 2 | * linux/drivers/char/serial167.c |
| 3 | * |
| 4 | * Driver for MVME166/7 board serial ports, which are via a CD2401. |
| 5 | * Based very much on cyclades.c. |
| 6 | * |
| 7 | * MVME166/7 work by Richard Hirst [richard@sleepie.demon.co.uk] |
| 8 | * |
| 9 | * ============================================================== |
| 10 | * |
| 11 | * static char rcsid[] = |
| 12 | * "$Revision: 1.36.1.4 $$Date: 1995/03/29 06:14:14 $"; |
| 13 | * |
| 14 | * linux/kernel/cyclades.c |
| 15 | * |
| 16 | * Maintained by Marcio Saito (cyclades@netcom.com) and |
| 17 | * Randolph Bentson (bentson@grieg.seaslug.org) |
| 18 | * |
| 19 | * Much of the design and some of the code came from serial.c |
| 20 | * which was copyright (C) 1991, 1992 Linus Torvalds. It was |
| 21 | * extensively rewritten by Theodore Ts'o, 8/16/92 -- 9/14/92, |
| 22 | * and then fixed as suggested by Michael K. Johnson 12/12/92. |
| 23 | * |
| 24 | * This version does not support shared irq's. |
| 25 | * |
| 26 | * $Log: cyclades.c,v $ |
| 27 | * Revision 1.36.1.4 1995/03/29 06:14:14 bentson |
| 28 | * disambiguate between Cyclom-16Y and Cyclom-32Ye; |
| 29 | * |
| 30 | * Changes: |
| 31 | * |
| 32 | * 200 lines of changes record removed - RGH 11-10-95, starting work on |
| 33 | * converting this to drive serial ports on mvme166 (cd2401). |
| 34 | * |
| 35 | * Arnaldo Carvalho de Melo <acme@conectiva.com.br> - 2000/08/25 |
| 36 | * - get rid of verify_area |
| 37 | * - use get_user to access memory from userspace in set_threshold, |
| 38 | * set_default_threshold and set_timeout |
| 39 | * - don't use the panic function in serial167_init |
| 40 | * - do resource release on failure on serial167_init |
| 41 | * - include missing restore_flags in mvme167_serial_console_setup |
| 42 | * |
| 43 | * Kars de Jong <jongk@linux-m68k.org> - 2004/09/06 |
| 44 | * - replace bottom half handler with task queue handler |
| 45 | */ |
| 46 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 47 | #include <linux/errno.h> |
| 48 | #include <linux/signal.h> |
| 49 | #include <linux/sched.h> |
| 50 | #include <linux/timer.h> |
| 51 | #include <linux/tty.h> |
| 52 | #include <linux/interrupt.h> |
| 53 | #include <linux/serial.h> |
| 54 | #include <linux/serialP.h> |
| 55 | #include <linux/string.h> |
| 56 | #include <linux/fcntl.h> |
| 57 | #include <linux/ptrace.h> |
| 58 | #include <linux/serial167.h> |
| 59 | #include <linux/delay.h> |
| 60 | #include <linux/major.h> |
| 61 | #include <linux/mm.h> |
| 62 | #include <linux/console.h> |
| 63 | #include <linux/module.h> |
| 64 | #include <linux/bitops.h> |
Geert Uytterhoeven | 81e859a | 2006-10-09 22:27:42 +0200 | [diff] [blame] | 65 | #include <linux/tty_flip.h> |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 66 | |
| 67 | #include <asm/system.h> |
| 68 | #include <asm/io.h> |
| 69 | #include <asm/mvme16xhw.h> |
| 70 | #include <asm/bootinfo.h> |
| 71 | #include <asm/setup.h> |
| 72 | |
| 73 | #include <linux/types.h> |
| 74 | #include <linux/kernel.h> |
| 75 | |
| 76 | #include <asm/uaccess.h> |
| 77 | #include <linux/init.h> |
| 78 | |
| 79 | #define SERIAL_PARANOIA_CHECK |
| 80 | #undef SERIAL_DEBUG_OPEN |
| 81 | #undef SERIAL_DEBUG_THROTTLE |
| 82 | #undef SERIAL_DEBUG_OTHER |
| 83 | #undef SERIAL_DEBUG_IO |
| 84 | #undef SERIAL_DEBUG_COUNT |
| 85 | #undef SERIAL_DEBUG_DTR |
| 86 | #undef CYCLOM_16Y_HACK |
| 87 | #define CYCLOM_ENABLE_MONITORING |
| 88 | |
| 89 | #define WAKEUP_CHARS 256 |
| 90 | |
| 91 | #define STD_COM_FLAGS (0) |
| 92 | |
| 93 | #define SERIAL_TYPE_NORMAL 1 |
| 94 | |
| 95 | static struct tty_driver *cy_serial_driver; |
| 96 | extern int serial_console; |
| 97 | static struct cyclades_port *serial_console_info = NULL; |
| 98 | static unsigned int serial_console_cflag = 0; |
| 99 | u_char initial_console_speed; |
| 100 | |
| 101 | /* Base address of cd2401 chip on mvme166/7 */ |
| 102 | |
| 103 | #define BASE_ADDR (0xfff45000) |
| 104 | #define pcc2chip ((volatile u_char *)0xfff42000) |
| 105 | #define PccSCCMICR 0x1d |
| 106 | #define PccSCCTICR 0x1e |
| 107 | #define PccSCCRICR 0x1f |
| 108 | #define PccTPIACKR 0x25 |
| 109 | #define PccRPIACKR 0x27 |
| 110 | #define PccIMLR 0x3f |
| 111 | |
| 112 | /* This is the per-port data structure */ |
| 113 | struct cyclades_port cy_port[] = { |
| 114 | /* CARD# */ |
| 115 | {-1 }, /* ttyS0 */ |
| 116 | {-1 }, /* ttyS1 */ |
| 117 | {-1 }, /* ttyS2 */ |
| 118 | {-1 }, /* ttyS3 */ |
| 119 | }; |
Tobias Klauser | fe97107 | 2006-01-09 20:54:02 -0800 | [diff] [blame] | 120 | #define NR_PORTS ARRAY_SIZE(cy_port) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 121 | |
| 122 | /* |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 123 | * This is used to look up the divisor speeds and the timeouts |
| 124 | * We're normally limited to 15 distinct baud rates. The extra |
| 125 | * are accessed via settings in info->flags. |
| 126 | * 0, 1, 2, 3, 4, 5, 6, 7, 8, 9, |
| 127 | * 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, |
| 128 | * HI VHI |
| 129 | */ |
| 130 | static int baud_table[] = { |
| 131 | 0, 50, 75, 110, 134, 150, 200, 300, 600, 1200, |
| 132 | 1800, 2400, 4800, 9600, 19200, 38400, 57600, 76800,115200,150000, |
| 133 | 0}; |
| 134 | |
| 135 | #if 0 |
| 136 | static char baud_co[] = { /* 25 MHz clock option table */ |
| 137 | /* value => 00 01 02 03 04 */ |
| 138 | /* divide by 8 32 128 512 2048 */ |
| 139 | 0x00, 0x04, 0x04, 0x04, 0x04, 0x04, 0x03, 0x03, 0x03, 0x02, |
| 140 | 0x02, 0x02, 0x01, 0x01, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00}; |
| 141 | |
| 142 | static char baud_bpr[] = { /* 25 MHz baud rate period table */ |
| 143 | 0x00, 0xf5, 0xa3, 0x6f, 0x5c, 0x51, 0xf5, 0xa3, 0x51, 0xa3, |
| 144 | 0x6d, 0x51, 0xa3, 0x51, 0xa3, 0x51, 0x36, 0x29, 0x1b, 0x15}; |
| 145 | #endif |
| 146 | |
| 147 | /* I think 166 brd clocks 2401 at 20MHz.... */ |
| 148 | |
| 149 | /* These values are written directly to tcor, and >> 5 for writing to rcor */ |
| 150 | static u_char baud_co[] = { /* 20 MHz clock option table */ |
| 151 | 0x00, 0x80, 0x80, 0x80, 0x80, 0x80, 0x80, 0x60, 0x60, 0x40, |
| 152 | 0x40, 0x40, 0x20, 0x20, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00}; |
| 153 | |
| 154 | /* These values written directly to tbpr/rbpr */ |
| 155 | static u_char baud_bpr[] = { /* 20 MHz baud rate period table */ |
| 156 | 0x00, 0xc0, 0x80, 0x58, 0x6c, 0x40, 0xc0, 0x81, 0x40, 0x81, |
| 157 | 0x57, 0x40, 0x81, 0x40, 0x81, 0x40, 0x2b, 0x20, 0x15, 0x10}; |
| 158 | |
| 159 | static u_char baud_cor4[] = { /* receive threshold */ |
| 160 | 0x0a, 0x0a, 0x0a, 0x0a, 0x0a, 0x0a, 0x0a, 0x0a, 0x0a, 0x0a, |
| 161 | 0x0a, 0x0a, 0x0a, 0x09, 0x09, 0x08, 0x08, 0x08, 0x08, 0x07}; |
| 162 | |
| 163 | |
| 164 | |
| 165 | static void shutdown(struct cyclades_port *); |
| 166 | static int startup (struct cyclades_port *); |
| 167 | static void cy_throttle(struct tty_struct *); |
| 168 | static void cy_unthrottle(struct tty_struct *); |
| 169 | static void config_setup(struct cyclades_port *); |
| 170 | extern void console_print(const char *); |
| 171 | #ifdef CYCLOM_SHOW_STATUS |
| 172 | static void show_status(int); |
| 173 | #endif |
| 174 | |
| 175 | #ifdef CONFIG_REMOTE_DEBUG |
| 176 | static void debug_setup(void); |
| 177 | void queueDebugChar (int c); |
| 178 | int getDebugChar(void); |
| 179 | |
| 180 | #define DEBUG_PORT 1 |
| 181 | #define DEBUG_LEN 256 |
| 182 | |
| 183 | typedef struct { |
| 184 | int in; |
| 185 | int out; |
| 186 | unsigned char buf[DEBUG_LEN]; |
| 187 | } debugq; |
| 188 | |
| 189 | debugq debugiq; |
| 190 | #endif |
| 191 | |
| 192 | /* |
| 193 | * I have my own version of udelay(), as it is needed when initialising |
| 194 | * the chip, before the delay loop has been calibrated. Should probably |
| 195 | * reference one of the vmechip2 or pccchip2 counter for an accurate |
| 196 | * delay, but this wild guess will do for now. |
| 197 | */ |
| 198 | |
| 199 | void my_udelay (long us) |
| 200 | { |
| 201 | u_char x; |
| 202 | volatile u_char *p = &x; |
| 203 | int i; |
| 204 | |
| 205 | while (us--) |
| 206 | for (i = 100; i; i--) |
| 207 | x |= *p; |
| 208 | } |
| 209 | |
| 210 | static inline int |
| 211 | serial_paranoia_check(struct cyclades_port *info, char *name, |
| 212 | const char *routine) |
| 213 | { |
| 214 | #ifdef SERIAL_PARANOIA_CHECK |
| 215 | static const char *badmagic = |
| 216 | "Warning: bad magic number for serial struct (%s) in %s\n"; |
| 217 | static const char *badinfo = |
| 218 | "Warning: null cyclades_port for (%s) in %s\n"; |
| 219 | static const char *badrange = |
| 220 | "Warning: cyclades_port out of range for (%s) in %s\n"; |
| 221 | |
| 222 | if (!info) { |
| 223 | printk(badinfo, name, routine); |
| 224 | return 1; |
| 225 | } |
| 226 | |
| 227 | if( (long)info < (long)(&cy_port[0]) |
| 228 | || (long)(&cy_port[NR_PORTS]) < (long)info ){ |
| 229 | printk(badrange, name, routine); |
| 230 | return 1; |
| 231 | } |
| 232 | |
| 233 | if (info->magic != CYCLADES_MAGIC) { |
| 234 | printk(badmagic, name, routine); |
| 235 | return 1; |
| 236 | } |
| 237 | #endif |
| 238 | return 0; |
| 239 | } /* serial_paranoia_check */ |
| 240 | |
| 241 | #if 0 |
| 242 | /* The following diagnostic routines allow the driver to spew |
| 243 | information on the screen, even (especially!) during interrupts. |
| 244 | */ |
| 245 | void |
| 246 | SP(char *data){ |
| 247 | unsigned long flags; |
| 248 | local_irq_save(flags); |
| 249 | console_print(data); |
| 250 | local_irq_restore(flags); |
| 251 | } |
| 252 | char scrn[2]; |
| 253 | void |
| 254 | CP(char data){ |
| 255 | unsigned long flags; |
| 256 | local_irq_save(flags); |
| 257 | scrn[0] = data; |
| 258 | console_print(scrn); |
| 259 | local_irq_restore(flags); |
| 260 | }/* CP */ |
| 261 | |
| 262 | void CP1(int data) { (data<10)? CP(data+'0'): CP(data+'A'-10); }/* CP1 */ |
| 263 | void CP2(int data) { CP1((data>>4) & 0x0f); CP1( data & 0x0f); }/* CP2 */ |
| 264 | void CP4(int data) { CP2((data>>8) & 0xff); CP2(data & 0xff); }/* CP4 */ |
| 265 | void CP8(long data) { CP4((data>>16) & 0xffff); CP4(data & 0xffff); }/* CP8 */ |
| 266 | #endif |
| 267 | |
| 268 | /* This routine waits up to 1000 micro-seconds for the previous |
| 269 | command to the Cirrus chip to complete and then issues the |
| 270 | new command. An error is returned if the previous command |
| 271 | didn't finish within the time limit. |
| 272 | */ |
| 273 | u_short |
| 274 | write_cy_cmd(volatile u_char *base_addr, u_char cmd) |
| 275 | { |
| 276 | unsigned long flags; |
| 277 | volatile int i; |
| 278 | |
| 279 | local_irq_save(flags); |
| 280 | /* Check to see that the previous command has completed */ |
| 281 | for(i = 0 ; i < 100 ; i++){ |
| 282 | if (base_addr[CyCCR] == 0){ |
| 283 | break; |
| 284 | } |
| 285 | my_udelay(10L); |
| 286 | } |
| 287 | /* if the CCR never cleared, the previous command |
| 288 | didn't finish within the "reasonable time" */ |
| 289 | if ( i == 10 ) { |
| 290 | local_irq_restore(flags); |
| 291 | return (-1); |
| 292 | } |
| 293 | |
| 294 | /* Issue the new command */ |
| 295 | base_addr[CyCCR] = cmd; |
| 296 | local_irq_restore(flags); |
| 297 | return(0); |
| 298 | } /* write_cy_cmd */ |
| 299 | |
| 300 | |
| 301 | /* cy_start and cy_stop provide software output flow control as a |
| 302 | function of XON/XOFF, software CTS, and other such stuff. */ |
| 303 | |
| 304 | static void |
| 305 | cy_stop(struct tty_struct *tty) |
| 306 | { |
| 307 | struct cyclades_port *info = (struct cyclades_port *)tty->driver_data; |
| 308 | volatile unsigned char *base_addr = (unsigned char *)BASE_ADDR; |
| 309 | int channel; |
| 310 | unsigned long flags; |
| 311 | |
| 312 | #ifdef SERIAL_DEBUG_OTHER |
| 313 | printk("cy_stop %s\n", tty->name); /* */ |
| 314 | #endif |
| 315 | |
| 316 | if (serial_paranoia_check(info, tty->name, "cy_stop")) |
| 317 | return; |
| 318 | |
| 319 | channel = info->line; |
| 320 | |
| 321 | local_irq_save(flags); |
| 322 | base_addr[CyCAR] = (u_char)(channel); /* index channel */ |
| 323 | base_addr[CyIER] &= ~(CyTxMpty|CyTxRdy); |
| 324 | local_irq_restore(flags); |
| 325 | |
| 326 | return; |
| 327 | } /* cy_stop */ |
| 328 | |
| 329 | static void |
| 330 | cy_start(struct tty_struct *tty) |
| 331 | { |
| 332 | struct cyclades_port *info = (struct cyclades_port *)tty->driver_data; |
| 333 | volatile unsigned char *base_addr = (unsigned char *)BASE_ADDR; |
| 334 | int channel; |
| 335 | unsigned long flags; |
| 336 | |
| 337 | #ifdef SERIAL_DEBUG_OTHER |
| 338 | printk("cy_start %s\n", tty->name); /* */ |
| 339 | #endif |
| 340 | |
| 341 | if (serial_paranoia_check(info, tty->name, "cy_start")) |
| 342 | return; |
| 343 | |
| 344 | channel = info->line; |
| 345 | |
| 346 | local_irq_save(flags); |
| 347 | base_addr[CyCAR] = (u_char)(channel); |
| 348 | base_addr[CyIER] |= CyTxMpty; |
| 349 | local_irq_restore(flags); |
| 350 | |
| 351 | return; |
| 352 | } /* cy_start */ |
| 353 | |
| 354 | |
| 355 | /* |
| 356 | * This routine is used by the interrupt handler to schedule |
| 357 | * processing in the software interrupt portion of the driver |
| 358 | * (also known as the "bottom half"). This can be called any |
| 359 | * number of times for any channel without harm. |
| 360 | */ |
| 361 | static inline void |
| 362 | cy_sched_event(struct cyclades_port *info, int event) |
| 363 | { |
| 364 | info->event |= 1 << event; /* remember what kind of event and who */ |
| 365 | schedule_work(&info->tqueue); |
| 366 | } /* cy_sched_event */ |
| 367 | |
| 368 | |
| 369 | /* The real interrupt service routines are called |
| 370 | whenever the card wants its hand held--chars |
| 371 | received, out buffer empty, modem change, etc. |
| 372 | */ |
| 373 | static irqreturn_t |
David Howells | 7d12e78 | 2006-10-05 14:55:46 +0100 | [diff] [blame] | 374 | cd2401_rxerr_interrupt(int irq, void *dev_id) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 375 | { |
| 376 | struct tty_struct *tty; |
| 377 | struct cyclades_port *info; |
| 378 | volatile unsigned char *base_addr = (unsigned char *)BASE_ADDR; |
| 379 | unsigned char err, rfoc; |
| 380 | int channel; |
| 381 | char data; |
| 382 | |
| 383 | /* determine the channel and change to that context */ |
| 384 | channel = (u_short ) (base_addr[CyLICR] >> 2); |
| 385 | info = &cy_port[channel]; |
| 386 | info->last_active = jiffies; |
| 387 | |
| 388 | if ((err = base_addr[CyRISR]) & CyTIMEOUT) { |
| 389 | /* This is a receive timeout interrupt, ignore it */ |
| 390 | base_addr[CyREOIR] = CyNOTRANS; |
| 391 | return IRQ_HANDLED; |
| 392 | } |
| 393 | |
| 394 | /* Read a byte of data if there is any - assume the error |
| 395 | * is associated with this character */ |
| 396 | |
| 397 | if ((rfoc = base_addr[CyRFOC]) != 0) |
| 398 | data = base_addr[CyRDR]; |
| 399 | else |
| 400 | data = 0; |
| 401 | |
| 402 | /* if there is nowhere to put the data, discard it */ |
| 403 | if(info->tty == 0) { |
| 404 | base_addr[CyREOIR] = rfoc ? 0 : CyNOTRANS; |
| 405 | return IRQ_HANDLED; |
| 406 | } |
| 407 | else { /* there is an open port for this data */ |
| 408 | tty = info->tty; |
| 409 | if(err & info->ignore_status_mask){ |
| 410 | base_addr[CyREOIR] = rfoc ? 0 : CyNOTRANS; |
| 411 | return IRQ_HANDLED; |
| 412 | } |
Alan Cox | 33f0f88 | 2006-01-09 20:54:13 -0800 | [diff] [blame] | 413 | if (tty_buffer_request_room(tty, 1) != 0){ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 414 | if (err & info->read_status_mask){ |
| 415 | if(err & CyBREAK){ |
Alan Cox | 33f0f88 | 2006-01-09 20:54:13 -0800 | [diff] [blame] | 416 | tty_insert_flip_char(tty, data, TTY_BREAK); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 417 | if (info->flags & ASYNC_SAK){ |
| 418 | do_SAK(tty); |
| 419 | } |
| 420 | }else if(err & CyFRAME){ |
Alan Cox | 33f0f88 | 2006-01-09 20:54:13 -0800 | [diff] [blame] | 421 | tty_insert_flip_char(tty, data, TTY_FRAME); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 422 | }else if(err & CyPARITY){ |
Alan Cox | 33f0f88 | 2006-01-09 20:54:13 -0800 | [diff] [blame] | 423 | tty_insert_flip_char(tty, data, TTY_PARITY); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 424 | }else if(err & CyOVERRUN){ |
Alan Cox | 33f0f88 | 2006-01-09 20:54:13 -0800 | [diff] [blame] | 425 | tty_insert_flip_char(tty, 0, TTY_OVERRUN); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 426 | /* |
| 427 | If the flip buffer itself is |
| 428 | overflowing, we still loose |
| 429 | the next incoming character. |
| 430 | */ |
Geert Uytterhoeven | 81e859a | 2006-10-09 22:27:42 +0200 | [diff] [blame] | 431 | if (tty_buffer_request_room(tty, 1) != 0){ |
| 432 | tty_insert_flip_char(tty, data, TTY_FRAME); |
| 433 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 434 | /* These two conditions may imply */ |
| 435 | /* a normal read should be done. */ |
| 436 | /* else if(data & CyTIMEOUT) */ |
| 437 | /* else if(data & CySPECHAR) */ |
| 438 | }else{ |
Alan Cox | 33f0f88 | 2006-01-09 20:54:13 -0800 | [diff] [blame] | 439 | tty_insert_flip_char(tty, 0, TTY_NORMAL); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 440 | } |
| 441 | }else{ |
Geert Uytterhoeven | 81e859a | 2006-10-09 22:27:42 +0200 | [diff] [blame] | 442 | tty_insert_flip_char(tty, data, TTY_NORMAL); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 443 | } |
| 444 | }else{ |
| 445 | /* there was a software buffer overrun |
| 446 | and nothing could be done about it!!! */ |
| 447 | } |
| 448 | } |
Geert Uytterhoeven | 81e859a | 2006-10-09 22:27:42 +0200 | [diff] [blame] | 449 | tty_schedule_flip(tty); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 450 | /* end of service */ |
| 451 | base_addr[CyREOIR] = rfoc ? 0 : CyNOTRANS; |
| 452 | return IRQ_HANDLED; |
| 453 | } /* cy_rxerr_interrupt */ |
| 454 | |
| 455 | static irqreturn_t |
David Howells | 7d12e78 | 2006-10-05 14:55:46 +0100 | [diff] [blame] | 456 | cd2401_modem_interrupt(int irq, void *dev_id) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 457 | { |
| 458 | struct cyclades_port *info; |
| 459 | volatile unsigned char *base_addr = (unsigned char *)BASE_ADDR; |
| 460 | int channel; |
| 461 | int mdm_change; |
| 462 | int mdm_status; |
| 463 | |
| 464 | |
| 465 | /* determine the channel and change to that context */ |
| 466 | channel = (u_short ) (base_addr[CyLICR] >> 2); |
| 467 | info = &cy_port[channel]; |
| 468 | info->last_active = jiffies; |
| 469 | |
| 470 | mdm_change = base_addr[CyMISR]; |
| 471 | mdm_status = base_addr[CyMSVR1]; |
| 472 | |
| 473 | if(info->tty == 0){ /* nowhere to put the data, ignore it */ |
| 474 | ; |
| 475 | }else{ |
| 476 | if((mdm_change & CyDCD) |
| 477 | && (info->flags & ASYNC_CHECK_CD)){ |
| 478 | if(mdm_status & CyDCD){ |
| 479 | /* CP('!'); */ |
| 480 | cy_sched_event(info, Cy_EVENT_OPEN_WAKEUP); |
| 481 | } else { |
| 482 | /* CP('@'); */ |
| 483 | cy_sched_event(info, Cy_EVENT_HANGUP); |
| 484 | } |
| 485 | } |
| 486 | if((mdm_change & CyCTS) |
| 487 | && (info->flags & ASYNC_CTS_FLOW)){ |
| 488 | if(info->tty->stopped){ |
| 489 | if(mdm_status & CyCTS){ |
| 490 | /* !!! cy_start isn't used because... */ |
| 491 | info->tty->stopped = 0; |
| 492 | base_addr[CyIER] |= CyTxMpty; |
| 493 | cy_sched_event(info, Cy_EVENT_WRITE_WAKEUP); |
| 494 | } |
| 495 | }else{ |
| 496 | if(!(mdm_status & CyCTS)){ |
| 497 | /* !!! cy_stop isn't used because... */ |
| 498 | info->tty->stopped = 1; |
| 499 | base_addr[CyIER] &= ~(CyTxMpty|CyTxRdy); |
| 500 | } |
| 501 | } |
| 502 | } |
| 503 | if(mdm_status & CyDSR){ |
| 504 | } |
| 505 | } |
| 506 | base_addr[CyMEOIR] = 0; |
| 507 | return IRQ_HANDLED; |
| 508 | } /* cy_modem_interrupt */ |
| 509 | |
| 510 | static irqreturn_t |
David Howells | 7d12e78 | 2006-10-05 14:55:46 +0100 | [diff] [blame] | 511 | cd2401_tx_interrupt(int irq, void *dev_id) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 512 | { |
| 513 | struct cyclades_port *info; |
| 514 | volatile unsigned char *base_addr = (unsigned char *)BASE_ADDR; |
| 515 | int channel; |
| 516 | int char_count, saved_cnt; |
| 517 | int outch; |
| 518 | |
| 519 | /* determine the channel and change to that context */ |
| 520 | channel = (u_short ) (base_addr[CyLICR] >> 2); |
| 521 | |
| 522 | #ifdef CONFIG_REMOTE_DEBUG |
| 523 | if (channel == DEBUG_PORT) { |
| 524 | panic ("TxInt on debug port!!!"); |
| 525 | } |
| 526 | #endif |
| 527 | |
| 528 | info = &cy_port[channel]; |
| 529 | |
| 530 | /* validate the port number (as configured and open) */ |
| 531 | if( (channel < 0) || (NR_PORTS <= channel) ){ |
| 532 | base_addr[CyIER] &= ~(CyTxMpty|CyTxRdy); |
| 533 | base_addr[CyTEOIR] = CyNOTRANS; |
| 534 | return IRQ_HANDLED; |
| 535 | } |
| 536 | info->last_active = jiffies; |
| 537 | if(info->tty == 0){ |
| 538 | base_addr[CyIER] &= ~(CyTxMpty|CyTxRdy); |
| 539 | if (info->xmit_cnt < WAKEUP_CHARS) { |
| 540 | cy_sched_event(info, Cy_EVENT_WRITE_WAKEUP); |
| 541 | } |
| 542 | base_addr[CyTEOIR] = CyNOTRANS; |
| 543 | return IRQ_HANDLED; |
| 544 | } |
| 545 | |
| 546 | /* load the on-chip space available for outbound data */ |
| 547 | saved_cnt = char_count = base_addr[CyTFTC]; |
| 548 | |
| 549 | if(info->x_char) { /* send special char */ |
| 550 | outch = info->x_char; |
| 551 | base_addr[CyTDR] = outch; |
| 552 | char_count--; |
| 553 | info->x_char = 0; |
| 554 | } |
| 555 | |
| 556 | if (info->x_break){ |
| 557 | /* The Cirrus chip requires the "Embedded Transmit |
| 558 | Commands" of start break, delay, and end break |
| 559 | sequences to be sent. The duration of the |
| 560 | break is given in TICs, which runs at HZ |
| 561 | (typically 100) and the PPR runs at 200 Hz, |
| 562 | so the delay is duration * 200/HZ, and thus a |
| 563 | break can run from 1/100 sec to about 5/4 sec. |
| 564 | Need to check these values - RGH 141095. |
| 565 | */ |
| 566 | base_addr[CyTDR] = 0; /* start break */ |
| 567 | base_addr[CyTDR] = 0x81; |
| 568 | base_addr[CyTDR] = 0; /* delay a bit */ |
| 569 | base_addr[CyTDR] = 0x82; |
| 570 | base_addr[CyTDR] = info->x_break*200/HZ; |
| 571 | base_addr[CyTDR] = 0; /* terminate break */ |
| 572 | base_addr[CyTDR] = 0x83; |
| 573 | char_count -= 7; |
| 574 | info->x_break = 0; |
| 575 | } |
| 576 | |
| 577 | while (char_count > 0){ |
| 578 | if (!info->xmit_cnt){ |
| 579 | base_addr[CyIER] &= ~(CyTxMpty|CyTxRdy); |
| 580 | break; |
| 581 | } |
| 582 | if (info->xmit_buf == 0){ |
| 583 | base_addr[CyIER] &= ~(CyTxMpty|CyTxRdy); |
| 584 | break; |
| 585 | } |
| 586 | if (info->tty->stopped || info->tty->hw_stopped){ |
| 587 | base_addr[CyIER] &= ~(CyTxMpty|CyTxRdy); |
| 588 | break; |
| 589 | } |
| 590 | /* Because the Embedded Transmit Commands have been |
| 591 | enabled, we must check to see if the escape |
| 592 | character, NULL, is being sent. If it is, we |
| 593 | must ensure that there is room for it to be |
| 594 | doubled in the output stream. Therefore we |
| 595 | no longer advance the pointer when the character |
| 596 | is fetched, but rather wait until after the check |
| 597 | for a NULL output character. (This is necessary |
| 598 | because there may not be room for the two chars |
| 599 | needed to send a NULL. |
| 600 | */ |
| 601 | outch = info->xmit_buf[info->xmit_tail]; |
| 602 | if( outch ){ |
| 603 | info->xmit_cnt--; |
| 604 | info->xmit_tail = (info->xmit_tail + 1) |
| 605 | & (PAGE_SIZE - 1); |
| 606 | base_addr[CyTDR] = outch; |
| 607 | char_count--; |
| 608 | }else{ |
| 609 | if(char_count > 1){ |
| 610 | info->xmit_cnt--; |
| 611 | info->xmit_tail = (info->xmit_tail + 1) |
| 612 | & (PAGE_SIZE - 1); |
| 613 | base_addr[CyTDR] = outch; |
| 614 | base_addr[CyTDR] = 0; |
| 615 | char_count--; |
| 616 | char_count--; |
| 617 | }else{ |
| 618 | break; |
| 619 | } |
| 620 | } |
| 621 | } |
| 622 | |
| 623 | if (info->xmit_cnt < WAKEUP_CHARS) { |
| 624 | cy_sched_event(info, Cy_EVENT_WRITE_WAKEUP); |
| 625 | } |
| 626 | base_addr[CyTEOIR] = (char_count != saved_cnt) ? 0 : CyNOTRANS; |
| 627 | return IRQ_HANDLED; |
| 628 | } /* cy_tx_interrupt */ |
| 629 | |
| 630 | static irqreturn_t |
David Howells | 7d12e78 | 2006-10-05 14:55:46 +0100 | [diff] [blame] | 631 | cd2401_rx_interrupt(int irq, void *dev_id) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 632 | { |
| 633 | struct tty_struct *tty; |
| 634 | struct cyclades_port *info; |
| 635 | volatile unsigned char *base_addr = (unsigned char *)BASE_ADDR; |
| 636 | int channel; |
| 637 | char data; |
| 638 | int char_count; |
| 639 | int save_cnt; |
Geert Uytterhoeven | 81e859a | 2006-10-09 22:27:42 +0200 | [diff] [blame] | 640 | int len; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 641 | |
| 642 | /* determine the channel and change to that context */ |
| 643 | channel = (u_short ) (base_addr[CyLICR] >> 2); |
| 644 | info = &cy_port[channel]; |
| 645 | info->last_active = jiffies; |
| 646 | save_cnt = char_count = base_addr[CyRFOC]; |
| 647 | |
| 648 | #ifdef CONFIG_REMOTE_DEBUG |
| 649 | if (channel == DEBUG_PORT) { |
| 650 | while (char_count--) { |
| 651 | data = base_addr[CyRDR]; |
| 652 | queueDebugChar(data); |
| 653 | } |
| 654 | } |
| 655 | else |
| 656 | #endif |
| 657 | /* if there is nowhere to put the data, discard it */ |
| 658 | if(info->tty == 0){ |
| 659 | while(char_count--){ |
| 660 | data = base_addr[CyRDR]; |
| 661 | } |
| 662 | }else{ /* there is an open port for this data */ |
| 663 | tty = info->tty; |
| 664 | /* load # characters available from the chip */ |
| 665 | |
| 666 | #ifdef CYCLOM_ENABLE_MONITORING |
| 667 | ++info->mon.int_count; |
| 668 | info->mon.char_count += char_count; |
| 669 | if (char_count > info->mon.char_max) |
| 670 | info->mon.char_max = char_count; |
| 671 | info->mon.char_last = char_count; |
| 672 | #endif |
Geert Uytterhoeven | 81e859a | 2006-10-09 22:27:42 +0200 | [diff] [blame] | 673 | len = tty_buffer_request_room(tty, char_count); |
| 674 | while(len--){ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 675 | data = base_addr[CyRDR]; |
Alan Cox | 33f0f88 | 2006-01-09 20:54:13 -0800 | [diff] [blame] | 676 | tty_insert_flip_char(tty, data, TTY_NORMAL); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 677 | #ifdef CYCLOM_16Y_HACK |
| 678 | udelay(10L); |
| 679 | #endif |
| 680 | } |
Geert Uytterhoeven | 81e859a | 2006-10-09 22:27:42 +0200 | [diff] [blame] | 681 | tty_schedule_flip(tty); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 682 | } |
| 683 | /* end of service */ |
| 684 | base_addr[CyREOIR] = save_cnt ? 0 : CyNOTRANS; |
| 685 | return IRQ_HANDLED; |
| 686 | } /* cy_rx_interrupt */ |
| 687 | |
| 688 | /* |
| 689 | * This routine is used to handle the "bottom half" processing for the |
| 690 | * serial driver, known also the "software interrupt" processing. |
| 691 | * This processing is done at the kernel interrupt level, after the |
| 692 | * cy#/_interrupt() has returned, BUT WITH INTERRUPTS TURNED ON. This |
| 693 | * is where time-consuming activities which can not be done in the |
| 694 | * interrupt driver proper are done; the interrupt driver schedules |
| 695 | * them using cy_sched_event(), and they get done here. |
| 696 | * |
| 697 | * This is done through one level of indirection--the task queue. |
| 698 | * When a hardware interrupt service routine wants service by the |
| 699 | * driver's bottom half, it enqueues the appropriate tq_struct (one |
| 700 | * per port) to the keventd work queue and sets a request flag |
| 701 | * that the work queue be processed. |
| 702 | * |
| 703 | * Although this may seem unwieldy, it gives the system a way to |
| 704 | * pass an argument (in this case the pointer to the cyclades_port |
| 705 | * structure) to the bottom half of the driver. Previous kernels |
| 706 | * had to poll every port to see if that port needed servicing. |
| 707 | */ |
| 708 | static void |
Al Viro | 3e577a8 | 2006-12-06 18:41:45 +0000 | [diff] [blame] | 709 | do_softint(struct work_struct *ugly_api) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 710 | { |
Al Viro | 3e577a8 | 2006-12-06 18:41:45 +0000 | [diff] [blame] | 711 | struct cyclades_port *info = container_of(ugly_api, struct cyclades_port, tqueue); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 712 | struct tty_struct *tty; |
| 713 | |
| 714 | tty = info->tty; |
| 715 | if (!tty) |
| 716 | return; |
| 717 | |
| 718 | if (test_and_clear_bit(Cy_EVENT_HANGUP, &info->event)) { |
| 719 | tty_hangup(info->tty); |
| 720 | wake_up_interruptible(&info->open_wait); |
| 721 | info->flags &= ~ASYNC_NORMAL_ACTIVE; |
| 722 | } |
| 723 | if (test_and_clear_bit(Cy_EVENT_OPEN_WAKEUP, &info->event)) { |
| 724 | wake_up_interruptible(&info->open_wait); |
| 725 | } |
| 726 | if (test_and_clear_bit(Cy_EVENT_WRITE_WAKEUP, &info->event)) { |
| 727 | tty_wakeup(tty); |
| 728 | } |
| 729 | } /* do_softint */ |
| 730 | |
| 731 | |
| 732 | /* This is called whenever a port becomes active; |
| 733 | interrupts are enabled and DTR & RTS are turned on. |
| 734 | */ |
| 735 | static int |
| 736 | startup(struct cyclades_port * info) |
| 737 | { |
| 738 | unsigned long flags; |
| 739 | volatile unsigned char *base_addr = (unsigned char *)BASE_ADDR; |
| 740 | int channel; |
| 741 | |
| 742 | if (info->flags & ASYNC_INITIALIZED){ |
| 743 | return 0; |
| 744 | } |
| 745 | |
| 746 | if (!info->type){ |
| 747 | if (info->tty){ |
| 748 | set_bit(TTY_IO_ERROR, &info->tty->flags); |
| 749 | } |
| 750 | return 0; |
| 751 | } |
| 752 | if (!info->xmit_buf){ |
| 753 | info->xmit_buf = (unsigned char *) get_zeroed_page (GFP_KERNEL); |
| 754 | if (!info->xmit_buf){ |
| 755 | return -ENOMEM; |
| 756 | } |
| 757 | } |
| 758 | |
| 759 | config_setup(info); |
| 760 | |
| 761 | channel = info->line; |
| 762 | |
| 763 | #ifdef SERIAL_DEBUG_OPEN |
| 764 | printk("startup channel %d\n", channel); |
| 765 | #endif |
| 766 | |
| 767 | local_irq_save(flags); |
| 768 | base_addr[CyCAR] = (u_char)channel; |
| 769 | write_cy_cmd(base_addr,CyENB_RCVR|CyENB_XMTR); |
| 770 | |
| 771 | base_addr[CyCAR] = (u_char)channel; /* !!! Is this needed? */ |
| 772 | base_addr[CyMSVR1] = CyRTS; |
| 773 | /* CP('S');CP('1'); */ |
| 774 | base_addr[CyMSVR2] = CyDTR; |
| 775 | |
| 776 | #ifdef SERIAL_DEBUG_DTR |
| 777 | printk("cyc: %d: raising DTR\n", __LINE__); |
| 778 | printk(" status: 0x%x, 0x%x\n", base_addr[CyMSVR1], base_addr[CyMSVR2]); |
| 779 | #endif |
| 780 | |
| 781 | base_addr[CyIER] |= CyRxData; |
| 782 | info->flags |= ASYNC_INITIALIZED; |
| 783 | |
| 784 | if (info->tty){ |
| 785 | clear_bit(TTY_IO_ERROR, &info->tty->flags); |
| 786 | } |
| 787 | info->xmit_cnt = info->xmit_head = info->xmit_tail = 0; |
| 788 | |
| 789 | local_irq_restore(flags); |
| 790 | |
| 791 | #ifdef SERIAL_DEBUG_OPEN |
| 792 | printk(" done\n"); |
| 793 | #endif |
| 794 | return 0; |
| 795 | } /* startup */ |
| 796 | |
| 797 | void |
| 798 | start_xmit( struct cyclades_port *info ) |
| 799 | { |
| 800 | unsigned long flags; |
| 801 | volatile unsigned char *base_addr = (u_char *)BASE_ADDR; |
| 802 | int channel; |
| 803 | |
| 804 | channel = info->line; |
| 805 | local_irq_save(flags); |
| 806 | base_addr[CyCAR] = channel; |
| 807 | base_addr[CyIER] |= CyTxMpty; |
| 808 | local_irq_restore(flags); |
| 809 | } /* start_xmit */ |
| 810 | |
| 811 | /* |
| 812 | * This routine shuts down a serial port; interrupts are disabled, |
| 813 | * and DTR is dropped if the hangup on close termio flag is on. |
| 814 | */ |
| 815 | static void |
| 816 | shutdown(struct cyclades_port * info) |
| 817 | { |
| 818 | unsigned long flags; |
| 819 | volatile unsigned char *base_addr = (u_char *)BASE_ADDR; |
| 820 | int channel; |
| 821 | |
| 822 | if (!(info->flags & ASYNC_INITIALIZED)){ |
| 823 | /* CP('$'); */ |
| 824 | return; |
| 825 | } |
| 826 | |
| 827 | channel = info->line; |
| 828 | |
| 829 | #ifdef SERIAL_DEBUG_OPEN |
| 830 | printk("shutdown channel %d\n", channel); |
| 831 | #endif |
| 832 | |
| 833 | /* !!! REALLY MUST WAIT FOR LAST CHARACTER TO BE |
| 834 | SENT BEFORE DROPPING THE LINE !!! (Perhaps |
| 835 | set some flag that is read when XMTY happens.) |
| 836 | Other choices are to delay some fixed interval |
| 837 | or schedule some later processing. |
| 838 | */ |
| 839 | local_irq_save(flags); |
| 840 | if (info->xmit_buf){ |
| 841 | free_page((unsigned long) info->xmit_buf); |
Al Viro | e5a301e | 2006-10-14 16:51:49 +0100 | [diff] [blame] | 842 | info->xmit_buf = NULL; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 843 | } |
| 844 | |
| 845 | base_addr[CyCAR] = (u_char)channel; |
| 846 | if (!info->tty || (info->tty->termios->c_cflag & HUPCL)) { |
| 847 | base_addr[CyMSVR1] = 0; |
| 848 | /* CP('C');CP('1'); */ |
| 849 | base_addr[CyMSVR2] = 0; |
| 850 | #ifdef SERIAL_DEBUG_DTR |
| 851 | printk("cyc: %d: dropping DTR\n", __LINE__); |
| 852 | printk(" status: 0x%x, 0x%x\n", base_addr[CyMSVR1], base_addr[CyMSVR2]); |
| 853 | #endif |
| 854 | } |
| 855 | write_cy_cmd(base_addr,CyDIS_RCVR); |
| 856 | /* it may be appropriate to clear _XMIT at |
| 857 | some later date (after testing)!!! */ |
| 858 | |
| 859 | if (info->tty){ |
| 860 | set_bit(TTY_IO_ERROR, &info->tty->flags); |
| 861 | } |
| 862 | info->flags &= ~ASYNC_INITIALIZED; |
| 863 | local_irq_restore(flags); |
| 864 | |
| 865 | #ifdef SERIAL_DEBUG_OPEN |
| 866 | printk(" done\n"); |
| 867 | #endif |
| 868 | return; |
| 869 | } /* shutdown */ |
| 870 | |
| 871 | /* |
| 872 | * This routine finds or computes the various line characteristics. |
| 873 | */ |
| 874 | static void |
| 875 | config_setup(struct cyclades_port * info) |
| 876 | { |
| 877 | unsigned long flags; |
| 878 | volatile unsigned char *base_addr = (u_char *)BASE_ADDR; |
| 879 | int channel; |
| 880 | unsigned cflag; |
| 881 | int i; |
| 882 | unsigned char ti, need_init_chan = 0; |
| 883 | |
| 884 | if (!info->tty || !info->tty->termios){ |
| 885 | return; |
| 886 | } |
| 887 | if (info->line == -1){ |
| 888 | return; |
| 889 | } |
| 890 | cflag = info->tty->termios->c_cflag; |
| 891 | |
| 892 | /* baud rate */ |
| 893 | i = cflag & CBAUD; |
| 894 | #ifdef CBAUDEX |
| 895 | /* Starting with kernel 1.1.65, there is direct support for |
| 896 | higher baud rates. The following code supports those |
| 897 | changes. The conditional aspect allows this driver to be |
| 898 | used for earlier as well as later kernel versions. (The |
| 899 | mapping is slightly different from serial.c because there |
| 900 | is still the possibility of supporting 75 kbit/sec with |
| 901 | the Cyclades board.) |
| 902 | */ |
| 903 | if (i & CBAUDEX) { |
| 904 | if (i == B57600) |
| 905 | i = 16; |
| 906 | else if(i == B115200) |
| 907 | i = 18; |
| 908 | #ifdef B78600 |
| 909 | else if(i == B78600) |
| 910 | i = 17; |
| 911 | #endif |
| 912 | else |
| 913 | info->tty->termios->c_cflag &= ~CBAUDEX; |
| 914 | } |
| 915 | #endif |
| 916 | if (i == 15) { |
| 917 | if ((info->flags & ASYNC_SPD_MASK) == ASYNC_SPD_HI) |
| 918 | i += 1; |
| 919 | if ((info->flags & ASYNC_SPD_MASK) == ASYNC_SPD_VHI) |
| 920 | i += 3; |
| 921 | } |
| 922 | /* Don't ever change the speed of the console port. It will |
| 923 | * run at the speed specified in bootinfo, or at 19.2K */ |
| 924 | /* Actually, it should run at whatever speed 166Bug was using */ |
| 925 | /* Note info->timeout isn't used at present */ |
| 926 | if (info != serial_console_info) { |
| 927 | info->tbpr = baud_bpr[i]; /* Tx BPR */ |
| 928 | info->tco = baud_co[i]; /* Tx CO */ |
| 929 | info->rbpr = baud_bpr[i]; /* Rx BPR */ |
| 930 | info->rco = baud_co[i] >> 5; /* Rx CO */ |
| 931 | if (baud_table[i] == 134) { |
| 932 | info->timeout = (info->xmit_fifo_size*HZ*30/269) + 2; |
| 933 | /* get it right for 134.5 baud */ |
| 934 | } else if (baud_table[i]) { |
| 935 | info->timeout = (info->xmit_fifo_size*HZ*15/baud_table[i]) + 2; |
| 936 | /* this needs to be propagated into the card info */ |
| 937 | } else { |
| 938 | info->timeout = 0; |
| 939 | } |
| 940 | } |
| 941 | /* By tradition (is it a standard?) a baud rate of zero |
| 942 | implies the line should be/has been closed. A bit |
| 943 | later in this routine such a test is performed. */ |
| 944 | |
| 945 | /* byte size and parity */ |
| 946 | info->cor7 = 0; |
| 947 | info->cor6 = 0; |
| 948 | info->cor5 = 0; |
| 949 | info->cor4 = (info->default_threshold |
| 950 | ? info->default_threshold |
| 951 | : baud_cor4[i]); /* receive threshold */ |
| 952 | /* Following two lines added 101295, RGH. */ |
| 953 | /* It is obviously wrong to access CyCORx, and not info->corx here, |
| 954 | * try and remember to fix it later! */ |
| 955 | channel = info->line; |
| 956 | base_addr[CyCAR] = (u_char)channel; |
| 957 | if (C_CLOCAL(info->tty)) { |
| 958 | if (base_addr[CyIER] & CyMdmCh) |
| 959 | base_addr[CyIER] &= ~CyMdmCh; /* without modem intr */ |
| 960 | /* ignore 1->0 modem transitions */ |
| 961 | if (base_addr[CyCOR4] & (CyDSR|CyCTS|CyDCD)) |
| 962 | base_addr[CyCOR4] &= ~(CyDSR|CyCTS|CyDCD); |
| 963 | /* ignore 0->1 modem transitions */ |
| 964 | if (base_addr[CyCOR5] & (CyDSR|CyCTS|CyDCD)) |
| 965 | base_addr[CyCOR5] &= ~(CyDSR|CyCTS|CyDCD); |
| 966 | } else { |
| 967 | if ((base_addr[CyIER] & CyMdmCh) != CyMdmCh) |
| 968 | base_addr[CyIER] |= CyMdmCh; /* with modem intr */ |
| 969 | /* act on 1->0 modem transitions */ |
| 970 | if ((base_addr[CyCOR4] & (CyDSR|CyCTS|CyDCD)) != (CyDSR|CyCTS|CyDCD)) |
| 971 | base_addr[CyCOR4] |= CyDSR|CyCTS|CyDCD; |
| 972 | /* act on 0->1 modem transitions */ |
| 973 | if ((base_addr[CyCOR5] & (CyDSR|CyCTS|CyDCD)) != (CyDSR|CyCTS|CyDCD)) |
| 974 | base_addr[CyCOR5] |= CyDSR|CyCTS|CyDCD; |
| 975 | } |
| 976 | info->cor3 = (cflag & CSTOPB) ? Cy_2_STOP : Cy_1_STOP; |
| 977 | info->cor2 = CyETC; |
| 978 | switch(cflag & CSIZE){ |
| 979 | case CS5: |
| 980 | info->cor1 = Cy_5_BITS; |
| 981 | break; |
| 982 | case CS6: |
| 983 | info->cor1 = Cy_6_BITS; |
| 984 | break; |
| 985 | case CS7: |
| 986 | info->cor1 = Cy_7_BITS; |
| 987 | break; |
| 988 | case CS8: |
| 989 | info->cor1 = Cy_8_BITS; |
| 990 | break; |
| 991 | } |
| 992 | if (cflag & PARENB){ |
| 993 | if (cflag & PARODD){ |
| 994 | info->cor1 |= CyPARITY_O; |
| 995 | }else{ |
| 996 | info->cor1 |= CyPARITY_E; |
| 997 | } |
| 998 | }else{ |
| 999 | info->cor1 |= CyPARITY_NONE; |
| 1000 | } |
| 1001 | |
| 1002 | /* CTS flow control flag */ |
| 1003 | #if 0 |
| 1004 | /* Don't complcate matters for now! RGH 141095 */ |
| 1005 | if (cflag & CRTSCTS){ |
| 1006 | info->flags |= ASYNC_CTS_FLOW; |
| 1007 | info->cor2 |= CyCtsAE; |
| 1008 | }else{ |
| 1009 | info->flags &= ~ASYNC_CTS_FLOW; |
| 1010 | info->cor2 &= ~CyCtsAE; |
| 1011 | } |
| 1012 | #endif |
| 1013 | if (cflag & CLOCAL) |
| 1014 | info->flags &= ~ASYNC_CHECK_CD; |
| 1015 | else |
| 1016 | info->flags |= ASYNC_CHECK_CD; |
| 1017 | |
| 1018 | /*********************************************** |
| 1019 | The hardware option, CyRtsAO, presents RTS when |
| 1020 | the chip has characters to send. Since most modems |
| 1021 | use RTS as reverse (inbound) flow control, this |
| 1022 | option is not used. If inbound flow control is |
| 1023 | necessary, DTR can be programmed to provide the |
| 1024 | appropriate signals for use with a non-standard |
| 1025 | cable. Contact Marcio Saito for details. |
| 1026 | ***********************************************/ |
| 1027 | |
| 1028 | channel = info->line; |
| 1029 | |
| 1030 | local_irq_save(flags); |
| 1031 | base_addr[CyCAR] = (u_char)channel; |
| 1032 | |
| 1033 | /* CyCMR set once only in mvme167_init_serial() */ |
| 1034 | if (base_addr[CyLICR] != channel << 2) |
| 1035 | base_addr[CyLICR] = channel << 2; |
| 1036 | if (base_addr[CyLIVR] != 0x5c) |
| 1037 | base_addr[CyLIVR] = 0x5c; |
| 1038 | |
| 1039 | /* tx and rx baud rate */ |
| 1040 | |
| 1041 | if (base_addr[CyCOR1] != info->cor1) |
| 1042 | need_init_chan = 1; |
| 1043 | if (base_addr[CyTCOR] != info->tco) |
| 1044 | base_addr[CyTCOR] = info->tco; |
| 1045 | if (base_addr[CyTBPR] != info->tbpr) |
| 1046 | base_addr[CyTBPR] = info->tbpr; |
| 1047 | if (base_addr[CyRCOR] != info->rco) |
| 1048 | base_addr[CyRCOR] = info->rco; |
| 1049 | if (base_addr[CyRBPR] != info->rbpr) |
| 1050 | base_addr[CyRBPR] = info->rbpr; |
| 1051 | |
| 1052 | /* set line characteristics according configuration */ |
| 1053 | |
| 1054 | if (base_addr[CySCHR1] != START_CHAR(info->tty)) |
| 1055 | base_addr[CySCHR1] = START_CHAR(info->tty); |
| 1056 | if (base_addr[CySCHR2] != STOP_CHAR(info->tty)) |
| 1057 | base_addr[CySCHR2] = STOP_CHAR(info->tty); |
| 1058 | if (base_addr[CySCRL] != START_CHAR(info->tty)) |
| 1059 | base_addr[CySCRL] = START_CHAR(info->tty); |
| 1060 | if (base_addr[CySCRH] != START_CHAR(info->tty)) |
| 1061 | base_addr[CySCRH] = START_CHAR(info->tty); |
| 1062 | if (base_addr[CyCOR1] != info->cor1) |
| 1063 | base_addr[CyCOR1] = info->cor1; |
| 1064 | if (base_addr[CyCOR2] != info->cor2) |
| 1065 | base_addr[CyCOR2] = info->cor2; |
| 1066 | if (base_addr[CyCOR3] != info->cor3) |
| 1067 | base_addr[CyCOR3] = info->cor3; |
| 1068 | if (base_addr[CyCOR4] != info->cor4) |
| 1069 | base_addr[CyCOR4] = info->cor4; |
| 1070 | if (base_addr[CyCOR5] != info->cor5) |
| 1071 | base_addr[CyCOR5] = info->cor5; |
| 1072 | if (base_addr[CyCOR6] != info->cor6) |
| 1073 | base_addr[CyCOR6] = info->cor6; |
| 1074 | if (base_addr[CyCOR7] != info->cor7) |
| 1075 | base_addr[CyCOR7] = info->cor7; |
| 1076 | |
| 1077 | if (need_init_chan) |
| 1078 | write_cy_cmd(base_addr,CyINIT_CHAN); |
| 1079 | |
| 1080 | base_addr[CyCAR] = (u_char)channel; /* !!! Is this needed? */ |
| 1081 | |
| 1082 | /* 2ms default rx timeout */ |
| 1083 | ti = info->default_timeout ? info->default_timeout : 0x02; |
| 1084 | if (base_addr[CyRTPRL] != ti) |
| 1085 | base_addr[CyRTPRL] = ti; |
| 1086 | if (base_addr[CyRTPRH] != 0) |
| 1087 | base_addr[CyRTPRH] = 0; |
| 1088 | |
| 1089 | /* Set up RTS here also ????? RGH 141095 */ |
| 1090 | if(i == 0){ /* baud rate is zero, turn off line */ |
| 1091 | if ((base_addr[CyMSVR2] & CyDTR) == CyDTR) |
| 1092 | base_addr[CyMSVR2] = 0; |
| 1093 | #ifdef SERIAL_DEBUG_DTR |
| 1094 | printk("cyc: %d: dropping DTR\n", __LINE__); |
| 1095 | printk(" status: 0x%x, 0x%x\n", base_addr[CyMSVR1], base_addr[CyMSVR2]); |
| 1096 | #endif |
| 1097 | }else{ |
| 1098 | if ((base_addr[CyMSVR2] & CyDTR) != CyDTR) |
| 1099 | base_addr[CyMSVR2] = CyDTR; |
| 1100 | #ifdef SERIAL_DEBUG_DTR |
| 1101 | printk("cyc: %d: raising DTR\n", __LINE__); |
| 1102 | printk(" status: 0x%x, 0x%x\n", base_addr[CyMSVR1], base_addr[CyMSVR2]); |
| 1103 | #endif |
| 1104 | } |
| 1105 | |
| 1106 | if (info->tty){ |
| 1107 | clear_bit(TTY_IO_ERROR, &info->tty->flags); |
| 1108 | } |
| 1109 | |
| 1110 | local_irq_restore(flags); |
| 1111 | |
| 1112 | } /* config_setup */ |
| 1113 | |
| 1114 | |
| 1115 | static void |
| 1116 | cy_put_char(struct tty_struct *tty, unsigned char ch) |
| 1117 | { |
| 1118 | struct cyclades_port *info = (struct cyclades_port *)tty->driver_data; |
| 1119 | unsigned long flags; |
| 1120 | |
| 1121 | #ifdef SERIAL_DEBUG_IO |
| 1122 | printk("cy_put_char %s(0x%02x)\n", tty->name, ch); |
| 1123 | #endif |
| 1124 | |
| 1125 | if (serial_paranoia_check(info, tty->name, "cy_put_char")) |
| 1126 | return; |
| 1127 | |
Jiri Slaby | d321765 | 2006-10-04 02:15:28 -0700 | [diff] [blame] | 1128 | if (!info->xmit_buf) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1129 | return; |
| 1130 | |
| 1131 | local_irq_save(flags); |
| 1132 | if (info->xmit_cnt >= PAGE_SIZE - 1) { |
| 1133 | local_irq_restore(flags); |
| 1134 | return; |
| 1135 | } |
| 1136 | |
| 1137 | info->xmit_buf[info->xmit_head++] = ch; |
| 1138 | info->xmit_head &= PAGE_SIZE - 1; |
| 1139 | info->xmit_cnt++; |
| 1140 | local_irq_restore(flags); |
| 1141 | } /* cy_put_char */ |
| 1142 | |
| 1143 | |
| 1144 | static void |
| 1145 | cy_flush_chars(struct tty_struct *tty) |
| 1146 | { |
| 1147 | struct cyclades_port *info = (struct cyclades_port *)tty->driver_data; |
| 1148 | unsigned long flags; |
| 1149 | volatile unsigned char *base_addr = (u_char *)BASE_ADDR; |
| 1150 | int channel; |
| 1151 | |
| 1152 | #ifdef SERIAL_DEBUG_IO |
| 1153 | printk("cy_flush_chars %s\n", tty->name); /* */ |
| 1154 | #endif |
| 1155 | |
| 1156 | if (serial_paranoia_check(info, tty->name, "cy_flush_chars")) |
| 1157 | return; |
| 1158 | |
| 1159 | if (info->xmit_cnt <= 0 || tty->stopped |
| 1160 | || tty->hw_stopped || !info->xmit_buf) |
| 1161 | return; |
| 1162 | |
| 1163 | channel = info->line; |
| 1164 | |
| 1165 | local_irq_save(flags); |
| 1166 | base_addr[CyCAR] = channel; |
| 1167 | base_addr[CyIER] |= CyTxMpty; |
| 1168 | local_irq_restore(flags); |
| 1169 | } /* cy_flush_chars */ |
| 1170 | |
| 1171 | |
| 1172 | /* This routine gets called when tty_write has put something into |
| 1173 | the write_queue. If the port is not already transmitting stuff, |
| 1174 | start it off by enabling interrupts. The interrupt service |
| 1175 | routine will then ensure that the characters are sent. If the |
| 1176 | port is already active, there is no need to kick it. |
| 1177 | */ |
| 1178 | static int |
| 1179 | cy_write(struct tty_struct * tty, |
| 1180 | const unsigned char *buf, int count) |
| 1181 | { |
| 1182 | struct cyclades_port *info = (struct cyclades_port *)tty->driver_data; |
| 1183 | unsigned long flags; |
| 1184 | int c, total = 0; |
| 1185 | |
| 1186 | #ifdef SERIAL_DEBUG_IO |
| 1187 | printk("cy_write %s\n", tty->name); /* */ |
| 1188 | #endif |
| 1189 | |
| 1190 | if (serial_paranoia_check(info, tty->name, "cy_write")){ |
| 1191 | return 0; |
| 1192 | } |
| 1193 | |
Jiri Slaby | d321765 | 2006-10-04 02:15:28 -0700 | [diff] [blame] | 1194 | if (!info->xmit_buf){ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1195 | return 0; |
| 1196 | } |
| 1197 | |
| 1198 | while (1) { |
| 1199 | local_irq_save(flags); |
| 1200 | c = min_t(int, count, min(SERIAL_XMIT_SIZE - info->xmit_cnt - 1, |
| 1201 | SERIAL_XMIT_SIZE - info->xmit_head)); |
| 1202 | if (c <= 0) { |
| 1203 | local_irq_restore(flags); |
| 1204 | break; |
| 1205 | } |
| 1206 | |
| 1207 | memcpy(info->xmit_buf + info->xmit_head, buf, c); |
| 1208 | info->xmit_head = (info->xmit_head + c) & (SERIAL_XMIT_SIZE-1); |
| 1209 | info->xmit_cnt += c; |
| 1210 | local_irq_restore(flags); |
| 1211 | |
| 1212 | buf += c; |
| 1213 | count -= c; |
| 1214 | total += c; |
| 1215 | } |
| 1216 | |
| 1217 | if (info->xmit_cnt |
| 1218 | && !tty->stopped |
| 1219 | && !tty->hw_stopped ) { |
| 1220 | start_xmit(info); |
| 1221 | } |
| 1222 | return total; |
| 1223 | } /* cy_write */ |
| 1224 | |
| 1225 | |
| 1226 | static int |
| 1227 | cy_write_room(struct tty_struct *tty) |
| 1228 | { |
| 1229 | struct cyclades_port *info = (struct cyclades_port *)tty->driver_data; |
| 1230 | int ret; |
| 1231 | |
| 1232 | #ifdef SERIAL_DEBUG_IO |
| 1233 | printk("cy_write_room %s\n", tty->name); /* */ |
| 1234 | #endif |
| 1235 | |
| 1236 | if (serial_paranoia_check(info, tty->name, "cy_write_room")) |
| 1237 | return 0; |
| 1238 | ret = PAGE_SIZE - info->xmit_cnt - 1; |
| 1239 | if (ret < 0) |
| 1240 | ret = 0; |
| 1241 | return ret; |
| 1242 | } /* cy_write_room */ |
| 1243 | |
| 1244 | |
| 1245 | static int |
| 1246 | cy_chars_in_buffer(struct tty_struct *tty) |
| 1247 | { |
| 1248 | struct cyclades_port *info = (struct cyclades_port *)tty->driver_data; |
| 1249 | |
| 1250 | #ifdef SERIAL_DEBUG_IO |
| 1251 | printk("cy_chars_in_buffer %s %d\n", tty->name, info->xmit_cnt); /* */ |
| 1252 | #endif |
| 1253 | |
| 1254 | if (serial_paranoia_check(info, tty->name, "cy_chars_in_buffer")) |
| 1255 | return 0; |
| 1256 | |
| 1257 | return info->xmit_cnt; |
| 1258 | } /* cy_chars_in_buffer */ |
| 1259 | |
| 1260 | |
| 1261 | static void |
| 1262 | cy_flush_buffer(struct tty_struct *tty) |
| 1263 | { |
| 1264 | struct cyclades_port *info = (struct cyclades_port *)tty->driver_data; |
| 1265 | unsigned long flags; |
| 1266 | |
| 1267 | #ifdef SERIAL_DEBUG_IO |
| 1268 | printk("cy_flush_buffer %s\n", tty->name); /* */ |
| 1269 | #endif |
| 1270 | |
| 1271 | if (serial_paranoia_check(info, tty->name, "cy_flush_buffer")) |
| 1272 | return; |
| 1273 | local_irq_save(flags); |
| 1274 | info->xmit_cnt = info->xmit_head = info->xmit_tail = 0; |
| 1275 | local_irq_restore(flags); |
| 1276 | tty_wakeup(tty); |
| 1277 | } /* cy_flush_buffer */ |
| 1278 | |
| 1279 | |
| 1280 | /* This routine is called by the upper-layer tty layer to signal |
| 1281 | that incoming characters should be throttled or that the |
| 1282 | throttle should be released. |
| 1283 | */ |
| 1284 | static void |
| 1285 | cy_throttle(struct tty_struct * tty) |
| 1286 | { |
| 1287 | struct cyclades_port *info = (struct cyclades_port *)tty->driver_data; |
| 1288 | unsigned long flags; |
| 1289 | volatile unsigned char *base_addr = (u_char *)BASE_ADDR; |
| 1290 | int channel; |
| 1291 | |
| 1292 | #ifdef SERIAL_DEBUG_THROTTLE |
| 1293 | char buf[64]; |
| 1294 | |
| 1295 | printk("throttle %s: %d....\n", tty_name(tty, buf), |
| 1296 | tty->ldisc.chars_in_buffer(tty)); |
| 1297 | printk("cy_throttle %s\n", tty->name); |
| 1298 | #endif |
| 1299 | |
| 1300 | if (serial_paranoia_check(info, tty->name, "cy_nthrottle")){ |
| 1301 | return; |
| 1302 | } |
| 1303 | |
| 1304 | if (I_IXOFF(tty)) { |
| 1305 | info->x_char = STOP_CHAR(tty); |
| 1306 | /* Should use the "Send Special Character" feature!!! */ |
| 1307 | } |
| 1308 | |
| 1309 | channel = info->line; |
| 1310 | |
| 1311 | local_irq_save(flags); |
| 1312 | base_addr[CyCAR] = (u_char)channel; |
| 1313 | base_addr[CyMSVR1] = 0; |
| 1314 | local_irq_restore(flags); |
| 1315 | |
| 1316 | return; |
| 1317 | } /* cy_throttle */ |
| 1318 | |
| 1319 | |
| 1320 | static void |
| 1321 | cy_unthrottle(struct tty_struct * tty) |
| 1322 | { |
| 1323 | struct cyclades_port *info = (struct cyclades_port *)tty->driver_data; |
| 1324 | unsigned long flags; |
| 1325 | volatile unsigned char *base_addr = (u_char *)BASE_ADDR; |
| 1326 | int channel; |
| 1327 | |
| 1328 | #ifdef SERIAL_DEBUG_THROTTLE |
| 1329 | char buf[64]; |
| 1330 | |
| 1331 | printk("throttle %s: %d....\n", tty_name(tty, buf), |
| 1332 | tty->ldisc.chars_in_buffer(tty)); |
| 1333 | printk("cy_unthrottle %s\n", tty->name); |
| 1334 | #endif |
| 1335 | |
| 1336 | if (serial_paranoia_check(info, tty->name, "cy_nthrottle")){ |
| 1337 | return; |
| 1338 | } |
| 1339 | |
| 1340 | if (I_IXOFF(tty)) { |
| 1341 | info->x_char = START_CHAR(tty); |
| 1342 | /* Should use the "Send Special Character" feature!!! */ |
| 1343 | } |
| 1344 | |
| 1345 | channel = info->line; |
| 1346 | |
| 1347 | local_irq_save(flags); |
| 1348 | base_addr[CyCAR] = (u_char)channel; |
| 1349 | base_addr[CyMSVR1] = CyRTS; |
| 1350 | local_irq_restore(flags); |
| 1351 | |
| 1352 | return; |
| 1353 | } /* cy_unthrottle */ |
| 1354 | |
| 1355 | static int |
| 1356 | get_serial_info(struct cyclades_port * info, |
Al Viro | e5a301e | 2006-10-14 16:51:49 +0100 | [diff] [blame] | 1357 | struct serial_struct __user * retinfo) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1358 | { |
| 1359 | struct serial_struct tmp; |
| 1360 | |
| 1361 | /* CP('g'); */ |
| 1362 | if (!retinfo) |
| 1363 | return -EFAULT; |
| 1364 | memset(&tmp, 0, sizeof(tmp)); |
| 1365 | tmp.type = info->type; |
| 1366 | tmp.line = info->line; |
| 1367 | tmp.port = info->line; |
| 1368 | tmp.irq = 0; |
| 1369 | tmp.flags = info->flags; |
| 1370 | tmp.baud_base = 0; /*!!!*/ |
| 1371 | tmp.close_delay = info->close_delay; |
| 1372 | tmp.custom_divisor = 0; /*!!!*/ |
| 1373 | tmp.hub6 = 0; /*!!!*/ |
| 1374 | return copy_to_user(retinfo,&tmp,sizeof(*retinfo)) ? -EFAULT : 0; |
| 1375 | } /* get_serial_info */ |
| 1376 | |
| 1377 | static int |
| 1378 | set_serial_info(struct cyclades_port * info, |
Al Viro | e5a301e | 2006-10-14 16:51:49 +0100 | [diff] [blame] | 1379 | struct serial_struct __user * new_info) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1380 | { |
| 1381 | struct serial_struct new_serial; |
| 1382 | struct cyclades_port old_info; |
| 1383 | |
| 1384 | /* CP('s'); */ |
| 1385 | if (!new_info) |
| 1386 | return -EFAULT; |
| 1387 | if (copy_from_user(&new_serial,new_info,sizeof(new_serial))) |
| 1388 | return -EFAULT; |
| 1389 | old_info = *info; |
| 1390 | |
| 1391 | if (!capable(CAP_SYS_ADMIN)) { |
| 1392 | if ((new_serial.close_delay != info->close_delay) || |
| 1393 | ((new_serial.flags & ASYNC_FLAGS & ~ASYNC_USR_MASK) != |
| 1394 | (info->flags & ASYNC_FLAGS & ~ASYNC_USR_MASK))) |
| 1395 | return -EPERM; |
| 1396 | info->flags = ((info->flags & ~ASYNC_USR_MASK) | |
| 1397 | (new_serial.flags & ASYNC_USR_MASK)); |
| 1398 | goto check_and_exit; |
| 1399 | } |
| 1400 | |
| 1401 | |
| 1402 | /* |
| 1403 | * OK, past this point, all the error checking has been done. |
| 1404 | * At this point, we start making changes..... |
| 1405 | */ |
| 1406 | |
| 1407 | info->flags = ((info->flags & ~ASYNC_FLAGS) | |
| 1408 | (new_serial.flags & ASYNC_FLAGS)); |
| 1409 | info->close_delay = new_serial.close_delay; |
| 1410 | |
| 1411 | |
| 1412 | check_and_exit: |
| 1413 | if (info->flags & ASYNC_INITIALIZED){ |
| 1414 | config_setup(info); |
| 1415 | return 0; |
| 1416 | }else{ |
| 1417 | return startup(info); |
| 1418 | } |
| 1419 | } /* set_serial_info */ |
| 1420 | |
| 1421 | static int |
| 1422 | cy_tiocmget(struct tty_struct *tty, struct file *file) |
| 1423 | { |
| 1424 | struct cyclades_port * info = (struct cyclades_port *)tty->driver_data; |
| 1425 | int channel; |
| 1426 | volatile unsigned char *base_addr = (u_char *)BASE_ADDR; |
| 1427 | unsigned long flags; |
| 1428 | unsigned char status; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1429 | |
| 1430 | channel = info->line; |
| 1431 | |
| 1432 | local_irq_save(flags); |
| 1433 | base_addr[CyCAR] = (u_char)channel; |
| 1434 | status = base_addr[CyMSVR1] | base_addr[CyMSVR2]; |
| 1435 | local_irq_restore(flags); |
| 1436 | |
| 1437 | return ((status & CyRTS) ? TIOCM_RTS : 0) |
| 1438 | | ((status & CyDTR) ? TIOCM_DTR : 0) |
| 1439 | | ((status & CyDCD) ? TIOCM_CAR : 0) |
| 1440 | | ((status & CyDSR) ? TIOCM_DSR : 0) |
| 1441 | | ((status & CyCTS) ? TIOCM_CTS : 0); |
| 1442 | } /* cy_tiocmget */ |
| 1443 | |
| 1444 | static int |
| 1445 | cy_tiocmset(struct tty_struct *tty, struct file *file, |
| 1446 | unsigned int set, unsigned int clear) |
| 1447 | { |
| 1448 | struct cyclades_port * info = (struct cyclades_port *)tty->driver_data; |
| 1449 | int channel; |
| 1450 | volatile unsigned char *base_addr = (u_char *)BASE_ADDR; |
| 1451 | unsigned long flags; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1452 | |
| 1453 | channel = info->line; |
| 1454 | |
| 1455 | if (set & TIOCM_RTS){ |
| 1456 | local_irq_save(flags); |
| 1457 | base_addr[CyCAR] = (u_char)channel; |
| 1458 | base_addr[CyMSVR1] = CyRTS; |
| 1459 | local_irq_restore(flags); |
| 1460 | } |
| 1461 | if (set & TIOCM_DTR){ |
| 1462 | local_irq_save(flags); |
| 1463 | base_addr[CyCAR] = (u_char)channel; |
| 1464 | /* CP('S');CP('2'); */ |
| 1465 | base_addr[CyMSVR2] = CyDTR; |
| 1466 | #ifdef SERIAL_DEBUG_DTR |
| 1467 | printk("cyc: %d: raising DTR\n", __LINE__); |
| 1468 | printk(" status: 0x%x, 0x%x\n", base_addr[CyMSVR1], base_addr[CyMSVR2]); |
| 1469 | #endif |
| 1470 | local_irq_restore(flags); |
| 1471 | } |
| 1472 | |
| 1473 | if (clear & TIOCM_RTS){ |
| 1474 | local_irq_save(flags); |
| 1475 | base_addr[CyCAR] = (u_char)channel; |
| 1476 | base_addr[CyMSVR1] = 0; |
| 1477 | local_irq_restore(flags); |
| 1478 | } |
| 1479 | if (clear & TIOCM_DTR){ |
| 1480 | local_irq_save(flags); |
| 1481 | base_addr[CyCAR] = (u_char)channel; |
| 1482 | /* CP('C');CP('2'); */ |
| 1483 | base_addr[CyMSVR2] = 0; |
| 1484 | #ifdef SERIAL_DEBUG_DTR |
| 1485 | printk("cyc: %d: dropping DTR\n", __LINE__); |
| 1486 | printk(" status: 0x%x, 0x%x\n", base_addr[CyMSVR1], base_addr[CyMSVR2]); |
| 1487 | #endif |
| 1488 | local_irq_restore(flags); |
| 1489 | } |
| 1490 | |
| 1491 | return 0; |
| 1492 | } /* set_modem_info */ |
| 1493 | |
| 1494 | static void |
| 1495 | send_break( struct cyclades_port * info, int duration) |
| 1496 | { /* Let the transmit ISR take care of this (since it |
| 1497 | requires stuffing characters into the output stream). |
| 1498 | */ |
| 1499 | info->x_break = duration; |
| 1500 | if (!info->xmit_cnt ) { |
| 1501 | start_xmit(info); |
| 1502 | } |
| 1503 | } /* send_break */ |
| 1504 | |
| 1505 | static int |
Al Viro | e5a301e | 2006-10-14 16:51:49 +0100 | [diff] [blame] | 1506 | get_mon_info(struct cyclades_port * info, struct cyclades_monitor __user * mon) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1507 | { |
| 1508 | |
| 1509 | if (copy_to_user(mon, &info->mon, sizeof(struct cyclades_monitor))) |
| 1510 | return -EFAULT; |
| 1511 | info->mon.int_count = 0; |
| 1512 | info->mon.char_count = 0; |
| 1513 | info->mon.char_max = 0; |
| 1514 | info->mon.char_last = 0; |
| 1515 | return 0; |
| 1516 | } |
| 1517 | |
| 1518 | static int |
Al Viro | e5a301e | 2006-10-14 16:51:49 +0100 | [diff] [blame] | 1519 | set_threshold(struct cyclades_port * info, unsigned long __user *arg) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1520 | { |
| 1521 | volatile unsigned char *base_addr = (u_char *)BASE_ADDR; |
| 1522 | unsigned long value; |
| 1523 | int channel; |
| 1524 | |
| 1525 | if (get_user(value, arg)) |
| 1526 | return -EFAULT; |
| 1527 | |
| 1528 | channel = info->line; |
| 1529 | info->cor4 &= ~CyREC_FIFO; |
| 1530 | info->cor4 |= value & CyREC_FIFO; |
| 1531 | base_addr[CyCOR4] = info->cor4; |
| 1532 | return 0; |
| 1533 | } |
| 1534 | |
| 1535 | static int |
Al Viro | e5a301e | 2006-10-14 16:51:49 +0100 | [diff] [blame] | 1536 | get_threshold(struct cyclades_port * info, unsigned long __user *value) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1537 | { |
| 1538 | volatile unsigned char *base_addr = (u_char *)BASE_ADDR; |
| 1539 | int channel; |
| 1540 | unsigned long tmp; |
| 1541 | |
| 1542 | channel = info->line; |
| 1543 | |
| 1544 | tmp = base_addr[CyCOR4] & CyREC_FIFO; |
| 1545 | return put_user(tmp,value); |
| 1546 | } |
| 1547 | |
| 1548 | static int |
Al Viro | e5a301e | 2006-10-14 16:51:49 +0100 | [diff] [blame] | 1549 | set_default_threshold(struct cyclades_port * info, unsigned long __user *arg) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1550 | { |
| 1551 | unsigned long value; |
| 1552 | |
| 1553 | if (get_user(value, arg)) |
| 1554 | return -EFAULT; |
| 1555 | |
| 1556 | info->default_threshold = value & 0x0f; |
| 1557 | return 0; |
| 1558 | } |
| 1559 | |
| 1560 | static int |
Al Viro | e5a301e | 2006-10-14 16:51:49 +0100 | [diff] [blame] | 1561 | get_default_threshold(struct cyclades_port * info, unsigned long __user *value) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1562 | { |
| 1563 | return put_user(info->default_threshold,value); |
| 1564 | } |
| 1565 | |
| 1566 | static int |
Al Viro | e5a301e | 2006-10-14 16:51:49 +0100 | [diff] [blame] | 1567 | set_timeout(struct cyclades_port * info, unsigned long __user *arg) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1568 | { |
| 1569 | volatile unsigned char *base_addr = (u_char *)BASE_ADDR; |
| 1570 | int channel; |
| 1571 | unsigned long value; |
| 1572 | |
| 1573 | if (get_user(value, arg)) |
| 1574 | return -EFAULT; |
| 1575 | |
| 1576 | channel = info->line; |
| 1577 | |
| 1578 | base_addr[CyRTPRL] = value & 0xff; |
| 1579 | base_addr[CyRTPRH] = (value >> 8) & 0xff; |
| 1580 | return 0; |
| 1581 | } |
| 1582 | |
| 1583 | static int |
Al Viro | e5a301e | 2006-10-14 16:51:49 +0100 | [diff] [blame] | 1584 | get_timeout(struct cyclades_port * info, unsigned long __user *value) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1585 | { |
| 1586 | volatile unsigned char *base_addr = (u_char *)BASE_ADDR; |
| 1587 | int channel; |
| 1588 | unsigned long tmp; |
| 1589 | |
| 1590 | channel = info->line; |
| 1591 | |
| 1592 | tmp = base_addr[CyRTPRL]; |
| 1593 | return put_user(tmp,value); |
| 1594 | } |
| 1595 | |
| 1596 | static int |
| 1597 | set_default_timeout(struct cyclades_port * info, unsigned long value) |
| 1598 | { |
| 1599 | info->default_timeout = value & 0xff; |
| 1600 | return 0; |
| 1601 | } |
| 1602 | |
| 1603 | static int |
Al Viro | e5a301e | 2006-10-14 16:51:49 +0100 | [diff] [blame] | 1604 | get_default_timeout(struct cyclades_port * info, unsigned long __user *value) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1605 | { |
| 1606 | return put_user(info->default_timeout,value); |
| 1607 | } |
| 1608 | |
| 1609 | static int |
| 1610 | cy_ioctl(struct tty_struct *tty, struct file * file, |
| 1611 | unsigned int cmd, unsigned long arg) |
| 1612 | { |
| 1613 | unsigned long val; |
| 1614 | struct cyclades_port * info = (struct cyclades_port *)tty->driver_data; |
| 1615 | int ret_val = 0; |
Al Viro | e5a301e | 2006-10-14 16:51:49 +0100 | [diff] [blame] | 1616 | void __user *argp = (void __user *)arg; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1617 | |
| 1618 | #ifdef SERIAL_DEBUG_OTHER |
| 1619 | printk("cy_ioctl %s, cmd = %x arg = %lx\n", tty->name, cmd, arg); /* */ |
| 1620 | #endif |
| 1621 | |
| 1622 | switch (cmd) { |
| 1623 | case CYGETMON: |
Al Viro | e5a301e | 2006-10-14 16:51:49 +0100 | [diff] [blame] | 1624 | ret_val = get_mon_info(info, argp); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1625 | break; |
| 1626 | case CYGETTHRESH: |
Al Viro | e5a301e | 2006-10-14 16:51:49 +0100 | [diff] [blame] | 1627 | ret_val = get_threshold(info, argp); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1628 | break; |
| 1629 | case CYSETTHRESH: |
Al Viro | e5a301e | 2006-10-14 16:51:49 +0100 | [diff] [blame] | 1630 | ret_val = set_threshold(info, argp); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1631 | break; |
| 1632 | case CYGETDEFTHRESH: |
Al Viro | e5a301e | 2006-10-14 16:51:49 +0100 | [diff] [blame] | 1633 | ret_val = get_default_threshold(info, argp); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1634 | break; |
| 1635 | case CYSETDEFTHRESH: |
Al Viro | e5a301e | 2006-10-14 16:51:49 +0100 | [diff] [blame] | 1636 | ret_val = set_default_threshold(info, argp); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1637 | break; |
| 1638 | case CYGETTIMEOUT: |
Al Viro | e5a301e | 2006-10-14 16:51:49 +0100 | [diff] [blame] | 1639 | ret_val = get_timeout(info, argp); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1640 | break; |
| 1641 | case CYSETTIMEOUT: |
Al Viro | e5a301e | 2006-10-14 16:51:49 +0100 | [diff] [blame] | 1642 | ret_val = set_timeout(info, argp); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1643 | break; |
| 1644 | case CYGETDEFTIMEOUT: |
Al Viro | e5a301e | 2006-10-14 16:51:49 +0100 | [diff] [blame] | 1645 | ret_val = get_default_timeout(info, argp); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1646 | break; |
| 1647 | case CYSETDEFTIMEOUT: |
| 1648 | ret_val = set_default_timeout(info, (unsigned long)arg); |
| 1649 | break; |
| 1650 | case TCSBRK: /* SVID version: non-zero arg --> no break */ |
| 1651 | ret_val = tty_check_change(tty); |
| 1652 | if (ret_val) |
| 1653 | break; |
| 1654 | tty_wait_until_sent(tty,0); |
| 1655 | if (!arg) |
| 1656 | send_break(info, HZ/4); /* 1/4 second */ |
| 1657 | break; |
| 1658 | case TCSBRKP: /* support for POSIX tcsendbreak() */ |
| 1659 | ret_val = tty_check_change(tty); |
| 1660 | if (ret_val) |
| 1661 | break; |
| 1662 | tty_wait_until_sent(tty,0); |
| 1663 | send_break(info, arg ? arg*(HZ/10) : HZ/4); |
| 1664 | break; |
| 1665 | |
| 1666 | /* The following commands are incompletely implemented!!! */ |
| 1667 | case TIOCGSOFTCAR: |
Al Viro | e5a301e | 2006-10-14 16:51:49 +0100 | [diff] [blame] | 1668 | ret_val = put_user(C_CLOCAL(tty) ? 1 : 0, (unsigned long __user *) argp); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1669 | break; |
| 1670 | case TIOCSSOFTCAR: |
Al Viro | e5a301e | 2006-10-14 16:51:49 +0100 | [diff] [blame] | 1671 | ret_val = get_user(val, (unsigned long __user *) argp); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1672 | if (ret_val) |
| 1673 | break; |
| 1674 | tty->termios->c_cflag = |
| 1675 | ((tty->termios->c_cflag & ~CLOCAL) | (val ? CLOCAL : 0)); |
| 1676 | break; |
| 1677 | case TIOCGSERIAL: |
Al Viro | e5a301e | 2006-10-14 16:51:49 +0100 | [diff] [blame] | 1678 | ret_val = get_serial_info(info, argp); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1679 | break; |
| 1680 | case TIOCSSERIAL: |
Al Viro | e5a301e | 2006-10-14 16:51:49 +0100 | [diff] [blame] | 1681 | ret_val = set_serial_info(info, argp); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1682 | break; |
| 1683 | default: |
| 1684 | ret_val = -ENOIOCTLCMD; |
| 1685 | } |
| 1686 | |
| 1687 | #ifdef SERIAL_DEBUG_OTHER |
| 1688 | printk("cy_ioctl done\n"); |
| 1689 | #endif |
| 1690 | |
| 1691 | return ret_val; |
| 1692 | } /* cy_ioctl */ |
| 1693 | |
| 1694 | |
| 1695 | |
| 1696 | |
| 1697 | static void |
Alan Cox | 606d099 | 2006-12-08 02:38:45 -0800 | [diff] [blame^] | 1698 | cy_set_termios(struct tty_struct *tty, struct ktermios * old_termios) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1699 | { |
| 1700 | struct cyclades_port *info = (struct cyclades_port *)tty->driver_data; |
| 1701 | |
| 1702 | #ifdef SERIAL_DEBUG_OTHER |
| 1703 | printk("cy_set_termios %s\n", tty->name); |
| 1704 | #endif |
| 1705 | |
| 1706 | if (tty->termios->c_cflag == old_termios->c_cflag) |
| 1707 | return; |
| 1708 | config_setup(info); |
| 1709 | |
| 1710 | if ((old_termios->c_cflag & CRTSCTS) && |
| 1711 | !(tty->termios->c_cflag & CRTSCTS)) { |
| 1712 | tty->stopped = 0; |
| 1713 | cy_start(tty); |
| 1714 | } |
| 1715 | #ifdef tytso_patch_94Nov25_1726 |
| 1716 | if (!(old_termios->c_cflag & CLOCAL) && |
| 1717 | (tty->termios->c_cflag & CLOCAL)) |
| 1718 | wake_up_interruptible(&info->open_wait); |
| 1719 | #endif |
| 1720 | |
| 1721 | return; |
| 1722 | } /* cy_set_termios */ |
| 1723 | |
| 1724 | |
| 1725 | static void |
| 1726 | cy_close(struct tty_struct * tty, struct file * filp) |
| 1727 | { |
| 1728 | struct cyclades_port * info = (struct cyclades_port *)tty->driver_data; |
| 1729 | |
| 1730 | /* CP('C'); */ |
| 1731 | #ifdef SERIAL_DEBUG_OTHER |
| 1732 | printk("cy_close %s\n", tty->name); |
| 1733 | #endif |
| 1734 | |
| 1735 | if (!info |
| 1736 | || serial_paranoia_check(info, tty->name, "cy_close")){ |
| 1737 | return; |
| 1738 | } |
| 1739 | #ifdef SERIAL_DEBUG_OPEN |
| 1740 | printk("cy_close %s, count = %d\n", tty->name, info->count); |
| 1741 | #endif |
| 1742 | |
| 1743 | if ((tty->count == 1) && (info->count != 1)) { |
| 1744 | /* |
| 1745 | * Uh, oh. tty->count is 1, which means that the tty |
| 1746 | * structure will be freed. Info->count should always |
| 1747 | * be one in these conditions. If it's greater than |
| 1748 | * one, we've got real problems, since it means the |
| 1749 | * serial port won't be shutdown. |
| 1750 | */ |
| 1751 | printk("cy_close: bad serial port count; tty->count is 1, " |
| 1752 | "info->count is %d\n", info->count); |
| 1753 | info->count = 1; |
| 1754 | } |
| 1755 | #ifdef SERIAL_DEBUG_COUNT |
| 1756 | printk("cyc: %d: decrementing count to %d\n", __LINE__, info->count - 1); |
| 1757 | #endif |
| 1758 | if (--info->count < 0) { |
| 1759 | printk("cy_close: bad serial port count for ttys%d: %d\n", |
| 1760 | info->line, info->count); |
| 1761 | #ifdef SERIAL_DEBUG_COUNT |
| 1762 | printk("cyc: %d: setting count to 0\n", __LINE__); |
| 1763 | #endif |
| 1764 | info->count = 0; |
| 1765 | } |
| 1766 | if (info->count) |
| 1767 | return; |
| 1768 | info->flags |= ASYNC_CLOSING; |
| 1769 | if (info->flags & ASYNC_INITIALIZED) |
| 1770 | tty_wait_until_sent(tty, 3000); /* 30 seconds timeout */ |
| 1771 | shutdown(info); |
| 1772 | if (tty->driver->flush_buffer) |
| 1773 | tty->driver->flush_buffer(tty); |
| 1774 | tty_ldisc_flush(tty); |
| 1775 | info->event = 0; |
Al Viro | e5a301e | 2006-10-14 16:51:49 +0100 | [diff] [blame] | 1776 | info->tty = NULL; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1777 | if (info->blocked_open) { |
| 1778 | if (info->close_delay) { |
| 1779 | msleep_interruptible(jiffies_to_msecs(info->close_delay)); |
| 1780 | } |
| 1781 | wake_up_interruptible(&info->open_wait); |
| 1782 | } |
| 1783 | info->flags &= ~(ASYNC_NORMAL_ACTIVE|ASYNC_CLOSING); |
| 1784 | wake_up_interruptible(&info->close_wait); |
| 1785 | |
| 1786 | #ifdef SERIAL_DEBUG_OTHER |
| 1787 | printk("cy_close done\n"); |
| 1788 | #endif |
| 1789 | |
| 1790 | return; |
| 1791 | } /* cy_close */ |
| 1792 | |
| 1793 | /* |
| 1794 | * cy_hangup() --- called by tty_hangup() when a hangup is signaled. |
| 1795 | */ |
| 1796 | void |
| 1797 | cy_hangup(struct tty_struct *tty) |
| 1798 | { |
| 1799 | struct cyclades_port * info = (struct cyclades_port *)tty->driver_data; |
| 1800 | |
| 1801 | #ifdef SERIAL_DEBUG_OTHER |
| 1802 | printk("cy_hangup %s\n", tty->name); /* */ |
| 1803 | #endif |
| 1804 | |
| 1805 | if (serial_paranoia_check(info, tty->name, "cy_hangup")) |
| 1806 | return; |
| 1807 | |
| 1808 | shutdown(info); |
| 1809 | #if 0 |
| 1810 | info->event = 0; |
| 1811 | info->count = 0; |
| 1812 | #ifdef SERIAL_DEBUG_COUNT |
| 1813 | printk("cyc: %d: setting count to 0\n", __LINE__); |
| 1814 | #endif |
| 1815 | info->tty = 0; |
| 1816 | #endif |
| 1817 | info->flags &= ~ASYNC_NORMAL_ACTIVE; |
| 1818 | wake_up_interruptible(&info->open_wait); |
| 1819 | } /* cy_hangup */ |
| 1820 | |
| 1821 | |
| 1822 | |
| 1823 | /* |
| 1824 | * ------------------------------------------------------------ |
| 1825 | * cy_open() and friends |
| 1826 | * ------------------------------------------------------------ |
| 1827 | */ |
| 1828 | |
| 1829 | static int |
| 1830 | block_til_ready(struct tty_struct *tty, struct file * filp, |
| 1831 | struct cyclades_port *info) |
| 1832 | { |
| 1833 | DECLARE_WAITQUEUE(wait, current); |
| 1834 | unsigned long flags; |
| 1835 | int channel; |
| 1836 | int retval; |
| 1837 | volatile u_char *base_addr = (u_char *)BASE_ADDR; |
| 1838 | |
| 1839 | /* |
| 1840 | * If the device is in the middle of being closed, then block |
| 1841 | * until it's done, and then try again. |
| 1842 | */ |
| 1843 | if (info->flags & ASYNC_CLOSING) { |
| 1844 | interruptible_sleep_on(&info->close_wait); |
| 1845 | if (info->flags & ASYNC_HUP_NOTIFY){ |
| 1846 | return -EAGAIN; |
| 1847 | }else{ |
| 1848 | return -ERESTARTSYS; |
| 1849 | } |
| 1850 | } |
| 1851 | |
| 1852 | /* |
| 1853 | * If non-blocking mode is set, then make the check up front |
| 1854 | * and then exit. |
| 1855 | */ |
| 1856 | if (filp->f_flags & O_NONBLOCK) { |
| 1857 | info->flags |= ASYNC_NORMAL_ACTIVE; |
| 1858 | return 0; |
| 1859 | } |
| 1860 | |
| 1861 | /* |
| 1862 | * Block waiting for the carrier detect and the line to become |
| 1863 | * free (i.e., not in use by the callout). While we are in |
| 1864 | * this loop, info->count is dropped by one, so that |
| 1865 | * cy_close() knows when to free things. We restore it upon |
| 1866 | * exit, either normal or abnormal. |
| 1867 | */ |
| 1868 | retval = 0; |
| 1869 | add_wait_queue(&info->open_wait, &wait); |
| 1870 | #ifdef SERIAL_DEBUG_OPEN |
| 1871 | printk("block_til_ready before block: %s, count = %d\n", |
| 1872 | tty->name, info->count);/**/ |
| 1873 | #endif |
| 1874 | info->count--; |
| 1875 | #ifdef SERIAL_DEBUG_COUNT |
| 1876 | printk("cyc: %d: decrementing count to %d\n", __LINE__, info->count); |
| 1877 | #endif |
| 1878 | info->blocked_open++; |
| 1879 | |
| 1880 | channel = info->line; |
| 1881 | |
| 1882 | while (1) { |
| 1883 | local_irq_save(flags); |
| 1884 | base_addr[CyCAR] = (u_char)channel; |
| 1885 | base_addr[CyMSVR1] = CyRTS; |
| 1886 | /* CP('S');CP('4'); */ |
| 1887 | base_addr[CyMSVR2] = CyDTR; |
| 1888 | #ifdef SERIAL_DEBUG_DTR |
| 1889 | printk("cyc: %d: raising DTR\n", __LINE__); |
| 1890 | printk(" status: 0x%x, 0x%x\n", base_addr[CyMSVR1], base_addr[CyMSVR2]); |
| 1891 | #endif |
| 1892 | local_irq_restore(flags); |
| 1893 | set_current_state(TASK_INTERRUPTIBLE); |
| 1894 | if (tty_hung_up_p(filp) |
| 1895 | || !(info->flags & ASYNC_INITIALIZED) ){ |
| 1896 | if (info->flags & ASYNC_HUP_NOTIFY) { |
| 1897 | retval = -EAGAIN; |
| 1898 | }else{ |
| 1899 | retval = -ERESTARTSYS; |
| 1900 | } |
| 1901 | break; |
| 1902 | } |
| 1903 | local_irq_save(flags); |
| 1904 | base_addr[CyCAR] = (u_char)channel; |
| 1905 | /* CP('L');CP1(1 && C_CLOCAL(tty)); CP1(1 && (base_addr[CyMSVR1] & CyDCD) ); */ |
| 1906 | if (!(info->flags & ASYNC_CLOSING) |
| 1907 | && (C_CLOCAL(tty) |
| 1908 | || (base_addr[CyMSVR1] & CyDCD))) { |
| 1909 | local_irq_restore(flags); |
| 1910 | break; |
| 1911 | } |
| 1912 | local_irq_restore(flags); |
| 1913 | if (signal_pending(current)) { |
| 1914 | retval = -ERESTARTSYS; |
| 1915 | break; |
| 1916 | } |
| 1917 | #ifdef SERIAL_DEBUG_OPEN |
| 1918 | printk("block_til_ready blocking: %s, count = %d\n", |
| 1919 | tty->name, info->count);/**/ |
| 1920 | #endif |
| 1921 | schedule(); |
| 1922 | } |
| 1923 | current->state = TASK_RUNNING; |
| 1924 | remove_wait_queue(&info->open_wait, &wait); |
| 1925 | if (!tty_hung_up_p(filp)){ |
| 1926 | info->count++; |
| 1927 | #ifdef SERIAL_DEBUG_COUNT |
| 1928 | printk("cyc: %d: incrementing count to %d\n", __LINE__, info->count); |
| 1929 | #endif |
| 1930 | } |
| 1931 | info->blocked_open--; |
| 1932 | #ifdef SERIAL_DEBUG_OPEN |
| 1933 | printk("block_til_ready after blocking: %s, count = %d\n", |
| 1934 | tty->name, info->count);/**/ |
| 1935 | #endif |
| 1936 | if (retval) |
| 1937 | return retval; |
| 1938 | info->flags |= ASYNC_NORMAL_ACTIVE; |
| 1939 | return 0; |
| 1940 | } /* block_til_ready */ |
| 1941 | |
| 1942 | /* |
| 1943 | * This routine is called whenever a serial port is opened. It |
| 1944 | * performs the serial-specific initialization for the tty structure. |
| 1945 | */ |
| 1946 | int |
| 1947 | cy_open(struct tty_struct *tty, struct file * filp) |
| 1948 | { |
| 1949 | struct cyclades_port *info; |
| 1950 | int retval, line; |
| 1951 | |
| 1952 | /* CP('O'); */ |
| 1953 | line = tty->index; |
| 1954 | if ((line < 0) || (NR_PORTS <= line)){ |
| 1955 | return -ENODEV; |
| 1956 | } |
| 1957 | info = &cy_port[line]; |
| 1958 | if (info->line < 0){ |
| 1959 | return -ENODEV; |
| 1960 | } |
| 1961 | #ifdef SERIAL_DEBUG_OTHER |
| 1962 | printk("cy_open %s\n", tty->name); /* */ |
| 1963 | #endif |
| 1964 | if (serial_paranoia_check(info, tty->name, "cy_open")){ |
| 1965 | return -ENODEV; |
| 1966 | } |
| 1967 | #ifdef SERIAL_DEBUG_OPEN |
| 1968 | printk("cy_open %s, count = %d\n", tty->name, info->count);/**/ |
| 1969 | #endif |
| 1970 | info->count++; |
| 1971 | #ifdef SERIAL_DEBUG_COUNT |
| 1972 | printk("cyc: %d: incrementing count to %d\n", __LINE__, info->count); |
| 1973 | #endif |
| 1974 | tty->driver_data = info; |
| 1975 | info->tty = tty; |
| 1976 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1977 | /* |
| 1978 | * Start up serial port |
| 1979 | */ |
| 1980 | retval = startup(info); |
| 1981 | if (retval){ |
| 1982 | return retval; |
| 1983 | } |
| 1984 | |
| 1985 | retval = block_til_ready(tty, filp, info); |
| 1986 | if (retval) { |
| 1987 | #ifdef SERIAL_DEBUG_OPEN |
| 1988 | printk("cy_open returning after block_til_ready with %d\n", |
| 1989 | retval); |
| 1990 | #endif |
| 1991 | return retval; |
| 1992 | } |
| 1993 | |
| 1994 | #ifdef SERIAL_DEBUG_OPEN |
| 1995 | printk("cy_open done\n");/**/ |
| 1996 | #endif |
| 1997 | return 0; |
| 1998 | } /* cy_open */ |
| 1999 | |
| 2000 | |
| 2001 | |
| 2002 | /* |
| 2003 | * --------------------------------------------------------------------- |
| 2004 | * serial167_init() and friends |
| 2005 | * |
| 2006 | * serial167_init() is called at boot-time to initialize the serial driver. |
| 2007 | * --------------------------------------------------------------------- |
| 2008 | */ |
| 2009 | |
| 2010 | /* |
| 2011 | * This routine prints out the appropriate serial driver version |
| 2012 | * number, and identifies which options were configured into this |
| 2013 | * driver. |
| 2014 | */ |
| 2015 | static void |
| 2016 | show_version(void) |
| 2017 | { |
| 2018 | printk("MVME166/167 cd2401 driver\n"); |
| 2019 | } /* show_version */ |
| 2020 | |
| 2021 | /* initialize chips on card -- return number of valid |
| 2022 | chips (which is number of ports/4) */ |
| 2023 | |
| 2024 | /* |
| 2025 | * This initialises the hardware to a reasonable state. It should |
| 2026 | * probe the chip first so as to copy 166-Bug setup as a default for |
| 2027 | * port 0. It initialises CMR to CyASYNC; that is never done again, so |
| 2028 | * as to limit the number of CyINIT_CHAN commands in normal running. |
| 2029 | * |
| 2030 | * ... I wonder what I should do if this fails ... |
| 2031 | */ |
| 2032 | |
| 2033 | void |
| 2034 | mvme167_serial_console_setup(int cflag) |
| 2035 | { |
| 2036 | volatile unsigned char* base_addr = (u_char *)BASE_ADDR; |
| 2037 | int ch; |
| 2038 | u_char spd; |
| 2039 | u_char rcor, rbpr, badspeed = 0; |
| 2040 | unsigned long flags; |
| 2041 | |
| 2042 | local_irq_save(flags); |
| 2043 | |
| 2044 | /* |
| 2045 | * First probe channel zero of the chip, to see what speed has |
| 2046 | * been selected. |
| 2047 | */ |
| 2048 | |
| 2049 | base_addr[CyCAR] = 0; |
| 2050 | |
| 2051 | rcor = base_addr[CyRCOR] << 5; |
| 2052 | rbpr = base_addr[CyRBPR]; |
| 2053 | |
| 2054 | for (spd = 0; spd < sizeof(baud_bpr); spd++) |
| 2055 | if (rbpr == baud_bpr[spd] && rcor == baud_co[spd]) |
| 2056 | break; |
| 2057 | if (spd >= sizeof(baud_bpr)) { |
| 2058 | spd = 14; /* 19200 */ |
| 2059 | badspeed = 1; /* Failed to identify speed */ |
| 2060 | } |
| 2061 | initial_console_speed = spd; |
| 2062 | |
| 2063 | /* OK, we have chosen a speed, now reset and reinitialise */ |
| 2064 | |
| 2065 | my_udelay(20000L); /* Allow time for any active o/p to complete */ |
| 2066 | if(base_addr[CyCCR] != 0x00){ |
| 2067 | local_irq_restore(flags); |
| 2068 | /* printk(" chip is never idle (CCR != 0)\n"); */ |
| 2069 | return; |
| 2070 | } |
| 2071 | |
| 2072 | base_addr[CyCCR] = CyCHIP_RESET; /* Reset the chip */ |
| 2073 | my_udelay(1000L); |
| 2074 | |
| 2075 | if(base_addr[CyGFRCR] == 0x00){ |
| 2076 | local_irq_restore(flags); |
| 2077 | /* printk(" chip is not responding (GFRCR stayed 0)\n"); */ |
| 2078 | return; |
| 2079 | } |
| 2080 | |
| 2081 | /* |
| 2082 | * System clock is 20Mhz, divided by 2048, so divide by 10 for a 1.0ms |
| 2083 | * tick |
| 2084 | */ |
| 2085 | |
| 2086 | base_addr[CyTPR] = 10; |
| 2087 | |
| 2088 | base_addr[CyPILR1] = 0x01; /* Interrupt level for modem change */ |
| 2089 | base_addr[CyPILR2] = 0x02; /* Interrupt level for tx ints */ |
| 2090 | base_addr[CyPILR3] = 0x03; /* Interrupt level for rx ints */ |
| 2091 | |
| 2092 | /* |
| 2093 | * Attempt to set up all channels to something reasonable, and |
| 2094 | * bang out a INIT_CHAN command. We should then be able to limit |
| 2095 | * the ammount of fiddling we have to do in normal running. |
| 2096 | */ |
| 2097 | |
| 2098 | for (ch = 3; ch >= 0 ; ch--) { |
| 2099 | base_addr[CyCAR] = (u_char)ch; |
| 2100 | base_addr[CyIER] = 0; |
| 2101 | base_addr[CyCMR] = CyASYNC; |
| 2102 | base_addr[CyLICR] = (u_char)ch << 2; |
| 2103 | base_addr[CyLIVR] = 0x5c; |
| 2104 | base_addr[CyTCOR] = baud_co[spd]; |
| 2105 | base_addr[CyTBPR] = baud_bpr[spd]; |
| 2106 | base_addr[CyRCOR] = baud_co[spd] >> 5; |
| 2107 | base_addr[CyRBPR] = baud_bpr[spd]; |
| 2108 | base_addr[CySCHR1] = 'Q' & 0x1f; |
| 2109 | base_addr[CySCHR2] = 'X' & 0x1f; |
| 2110 | base_addr[CySCRL] = 0; |
| 2111 | base_addr[CySCRH] = 0; |
| 2112 | base_addr[CyCOR1] = Cy_8_BITS | CyPARITY_NONE; |
| 2113 | base_addr[CyCOR2] = 0; |
| 2114 | base_addr[CyCOR3] = Cy_1_STOP; |
| 2115 | base_addr[CyCOR4] = baud_cor4[spd]; |
| 2116 | base_addr[CyCOR5] = 0; |
| 2117 | base_addr[CyCOR6] = 0; |
| 2118 | base_addr[CyCOR7] = 0; |
| 2119 | base_addr[CyRTPRL] = 2; |
| 2120 | base_addr[CyRTPRH] = 0; |
| 2121 | base_addr[CyMSVR1] = 0; |
| 2122 | base_addr[CyMSVR2] = 0; |
| 2123 | write_cy_cmd(base_addr,CyINIT_CHAN|CyDIS_RCVR|CyDIS_XMTR); |
| 2124 | } |
| 2125 | |
| 2126 | /* |
| 2127 | * Now do specials for channel zero.... |
| 2128 | */ |
| 2129 | |
| 2130 | base_addr[CyMSVR1] = CyRTS; |
| 2131 | base_addr[CyMSVR2] = CyDTR; |
| 2132 | base_addr[CyIER] = CyRxData; |
| 2133 | write_cy_cmd(base_addr,CyENB_RCVR|CyENB_XMTR); |
| 2134 | |
| 2135 | local_irq_restore(flags); |
| 2136 | |
| 2137 | my_udelay(20000L); /* Let it all settle down */ |
| 2138 | |
| 2139 | printk("CD2401 initialised, chip is rev 0x%02x\n", base_addr[CyGFRCR]); |
| 2140 | if (badspeed) |
| 2141 | printk(" WARNING: Failed to identify line speed, rcor=%02x,rbpr=%02x\n", |
| 2142 | rcor >> 5, rbpr); |
| 2143 | } /* serial_console_init */ |
| 2144 | |
Jeff Dike | b68e31d | 2006-10-02 02:17:18 -0700 | [diff] [blame] | 2145 | static const struct tty_operations cy_ops = { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2146 | .open = cy_open, |
| 2147 | .close = cy_close, |
| 2148 | .write = cy_write, |
| 2149 | .put_char = cy_put_char, |
| 2150 | .flush_chars = cy_flush_chars, |
| 2151 | .write_room = cy_write_room, |
| 2152 | .chars_in_buffer = cy_chars_in_buffer, |
| 2153 | .flush_buffer = cy_flush_buffer, |
| 2154 | .ioctl = cy_ioctl, |
| 2155 | .throttle = cy_throttle, |
| 2156 | .unthrottle = cy_unthrottle, |
| 2157 | .set_termios = cy_set_termios, |
| 2158 | .stop = cy_stop, |
| 2159 | .start = cy_start, |
| 2160 | .hangup = cy_hangup, |
| 2161 | .tiocmget = cy_tiocmget, |
| 2162 | .tiocmset = cy_tiocmset, |
| 2163 | }; |
| 2164 | /* The serial driver boot-time initialization code! |
| 2165 | Hardware I/O ports are mapped to character special devices on a |
| 2166 | first found, first allocated manner. That is, this code searches |
| 2167 | for Cyclom cards in the system. As each is found, it is probed |
| 2168 | to discover how many chips (and thus how many ports) are present. |
| 2169 | These ports are mapped to the tty ports 64 and upward in monotonic |
| 2170 | fashion. If an 8-port card is replaced with a 16-port card, the |
| 2171 | port mapping on a following card will shift. |
| 2172 | |
| 2173 | This approach is different from what is used in the other serial |
| 2174 | device driver because the Cyclom is more properly a multiplexer, |
| 2175 | not just an aggregation of serial ports on one card. |
| 2176 | |
| 2177 | If there are more cards with more ports than have been statically |
| 2178 | allocated above, a warning is printed and the extra ports are ignored. |
| 2179 | */ |
| 2180 | static int __init |
| 2181 | serial167_init(void) |
| 2182 | { |
| 2183 | struct cyclades_port *info; |
| 2184 | int ret = 0; |
| 2185 | int good_ports = 0; |
| 2186 | int port_num = 0; |
| 2187 | int index; |
| 2188 | int DefSpeed; |
| 2189 | #ifdef notyet |
| 2190 | struct sigaction sa; |
| 2191 | #endif |
| 2192 | |
| 2193 | if (!(mvme16x_config &MVME16x_CONFIG_GOT_CD2401)) |
| 2194 | return 0; |
| 2195 | |
| 2196 | cy_serial_driver = alloc_tty_driver(NR_PORTS); |
| 2197 | if (!cy_serial_driver) |
| 2198 | return -ENOMEM; |
| 2199 | |
| 2200 | #if 0 |
| 2201 | scrn[1] = '\0'; |
| 2202 | #endif |
| 2203 | |
| 2204 | show_version(); |
| 2205 | |
| 2206 | /* Has "console=0,9600n8" been used in bootinfo to change speed? */ |
| 2207 | if (serial_console_cflag) |
| 2208 | DefSpeed = serial_console_cflag & 0017; |
| 2209 | else { |
| 2210 | DefSpeed = initial_console_speed; |
| 2211 | serial_console_info = &cy_port[0]; |
| 2212 | serial_console_cflag = DefSpeed | CS8; |
| 2213 | #if 0 |
| 2214 | serial_console = 64; /*callout_driver.minor_start*/ |
| 2215 | #endif |
| 2216 | } |
| 2217 | |
| 2218 | /* Initialize the tty_driver structure */ |
| 2219 | |
| 2220 | cy_serial_driver->owner = THIS_MODULE; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2221 | cy_serial_driver->name = "ttyS"; |
| 2222 | cy_serial_driver->major = TTY_MAJOR; |
| 2223 | cy_serial_driver->minor_start = 64; |
| 2224 | cy_serial_driver->type = TTY_DRIVER_TYPE_SERIAL; |
| 2225 | cy_serial_driver->subtype = SERIAL_TYPE_NORMAL; |
| 2226 | cy_serial_driver->init_termios = tty_std_termios; |
| 2227 | cy_serial_driver->init_termios.c_cflag = |
| 2228 | B9600 | CS8 | CREAD | HUPCL | CLOCAL; |
| 2229 | cy_serial_driver->flags = TTY_DRIVER_REAL_RAW; |
| 2230 | tty_set_operations(cy_serial_driver, &cy_ops); |
| 2231 | |
| 2232 | ret = tty_register_driver(cy_serial_driver); |
| 2233 | if (ret) { |
| 2234 | printk(KERN_ERR "Couldn't register MVME166/7 serial driver\n"); |
| 2235 | put_tty_driver(cy_serial_driver); |
| 2236 | return ret; |
| 2237 | } |
| 2238 | |
| 2239 | port_num = 0; |
| 2240 | info = cy_port; |
| 2241 | for (index = 0; index < 1; index++) { |
| 2242 | |
| 2243 | good_ports = 4; |
| 2244 | |
| 2245 | if(port_num < NR_PORTS){ |
| 2246 | while( good_ports-- && port_num < NR_PORTS){ |
| 2247 | /*** initialize port ***/ |
| 2248 | info->magic = CYCLADES_MAGIC; |
| 2249 | info->type = PORT_CIRRUS; |
| 2250 | info->card = index; |
| 2251 | info->line = port_num; |
| 2252 | info->flags = STD_COM_FLAGS; |
Al Viro | e5a301e | 2006-10-14 16:51:49 +0100 | [diff] [blame] | 2253 | info->tty = NULL; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2254 | info->xmit_fifo_size = 12; |
| 2255 | info->cor1 = CyPARITY_NONE|Cy_8_BITS; |
| 2256 | info->cor2 = CyETC; |
| 2257 | info->cor3 = Cy_1_STOP; |
| 2258 | info->cor4 = 0x08; /* _very_ small receive threshold */ |
| 2259 | info->cor5 = 0; |
| 2260 | info->cor6 = 0; |
| 2261 | info->cor7 = 0; |
| 2262 | info->tbpr = baud_bpr[DefSpeed]; /* Tx BPR */ |
| 2263 | info->tco = baud_co[DefSpeed]; /* Tx CO */ |
| 2264 | info->rbpr = baud_bpr[DefSpeed]; /* Rx BPR */ |
| 2265 | info->rco = baud_co[DefSpeed] >> 5; /* Rx CO */ |
| 2266 | info->close_delay = 0; |
| 2267 | info->x_char = 0; |
| 2268 | info->event = 0; |
| 2269 | info->count = 0; |
| 2270 | #ifdef SERIAL_DEBUG_COUNT |
| 2271 | printk("cyc: %d: setting count to 0\n", __LINE__); |
| 2272 | #endif |
| 2273 | info->blocked_open = 0; |
| 2274 | info->default_threshold = 0; |
| 2275 | info->default_timeout = 0; |
Al Viro | 3e577a8 | 2006-12-06 18:41:45 +0000 | [diff] [blame] | 2276 | INIT_WORK(&info->tqueue, do_softint); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2277 | init_waitqueue_head(&info->open_wait); |
| 2278 | init_waitqueue_head(&info->close_wait); |
| 2279 | /* info->session */ |
| 2280 | /* info->pgrp */ |
| 2281 | /*** !!!!!!!! this may expose new bugs !!!!!!!!! *********/ |
| 2282 | info->read_status_mask = CyTIMEOUT| CySPECHAR| CyBREAK |
| 2283 | | CyPARITY| CyFRAME| CyOVERRUN; |
| 2284 | /* info->timeout */ |
| 2285 | |
| 2286 | printk("ttyS%d ", info->line); |
| 2287 | port_num++;info++; |
| 2288 | if(!(port_num & 7)){ |
| 2289 | printk("\n "); |
| 2290 | } |
| 2291 | } |
| 2292 | } |
| 2293 | printk("\n"); |
| 2294 | } |
| 2295 | while( port_num < NR_PORTS){ |
| 2296 | info->line = -1; |
| 2297 | port_num++;info++; |
| 2298 | } |
| 2299 | #ifdef CONFIG_REMOTE_DEBUG |
| 2300 | debug_setup(); |
| 2301 | #endif |
| 2302 | ret = request_irq(MVME167_IRQ_SER_ERR, cd2401_rxerr_interrupt, 0, |
| 2303 | "cd2401_errors", cd2401_rxerr_interrupt); |
| 2304 | if (ret) { |
| 2305 | printk(KERN_ERR "Could't get cd2401_errors IRQ"); |
| 2306 | goto cleanup_serial_driver; |
| 2307 | } |
| 2308 | |
| 2309 | ret = request_irq(MVME167_IRQ_SER_MODEM, cd2401_modem_interrupt, 0, |
| 2310 | "cd2401_modem", cd2401_modem_interrupt); |
| 2311 | if (ret) { |
| 2312 | printk(KERN_ERR "Could't get cd2401_modem IRQ"); |
| 2313 | goto cleanup_irq_cd2401_errors; |
| 2314 | } |
| 2315 | |
| 2316 | ret = request_irq(MVME167_IRQ_SER_TX, cd2401_tx_interrupt, 0, |
| 2317 | "cd2401_txints", cd2401_tx_interrupt); |
| 2318 | if (ret) { |
| 2319 | printk(KERN_ERR "Could't get cd2401_txints IRQ"); |
| 2320 | goto cleanup_irq_cd2401_modem; |
| 2321 | } |
| 2322 | |
| 2323 | ret = request_irq(MVME167_IRQ_SER_RX, cd2401_rx_interrupt, 0, |
| 2324 | "cd2401_rxints", cd2401_rx_interrupt); |
| 2325 | if (ret) { |
| 2326 | printk(KERN_ERR "Could't get cd2401_rxints IRQ"); |
| 2327 | goto cleanup_irq_cd2401_txints; |
| 2328 | } |
| 2329 | |
| 2330 | /* Now we have registered the interrupt handlers, allow the interrupts */ |
| 2331 | |
| 2332 | pcc2chip[PccSCCMICR] = 0x15; /* Serial ints are level 5 */ |
| 2333 | pcc2chip[PccSCCTICR] = 0x15; |
| 2334 | pcc2chip[PccSCCRICR] = 0x15; |
| 2335 | |
| 2336 | pcc2chip[PccIMLR] = 3; /* Allow PCC2 ints above 3!? */ |
| 2337 | |
| 2338 | return 0; |
| 2339 | cleanup_irq_cd2401_txints: |
| 2340 | free_irq(MVME167_IRQ_SER_TX, cd2401_tx_interrupt); |
| 2341 | cleanup_irq_cd2401_modem: |
| 2342 | free_irq(MVME167_IRQ_SER_MODEM, cd2401_modem_interrupt); |
| 2343 | cleanup_irq_cd2401_errors: |
| 2344 | free_irq(MVME167_IRQ_SER_ERR, cd2401_rxerr_interrupt); |
| 2345 | cleanup_serial_driver: |
| 2346 | if (tty_unregister_driver(cy_serial_driver)) |
| 2347 | printk(KERN_ERR "Couldn't unregister MVME166/7 serial driver\n"); |
| 2348 | put_tty_driver(cy_serial_driver); |
| 2349 | return ret; |
| 2350 | } /* serial167_init */ |
| 2351 | |
| 2352 | module_init(serial167_init); |
| 2353 | |
| 2354 | |
| 2355 | #ifdef CYCLOM_SHOW_STATUS |
| 2356 | static void |
| 2357 | show_status(int line_num) |
| 2358 | { |
| 2359 | volatile unsigned char *base_addr = (u_char *)BASE_ADDR; |
| 2360 | int channel; |
| 2361 | struct cyclades_port * info; |
| 2362 | unsigned long flags; |
| 2363 | |
| 2364 | info = &cy_port[line_num]; |
| 2365 | channel = info->line; |
| 2366 | printk(" channel %d\n", channel);/**/ |
| 2367 | |
| 2368 | printk(" cy_port\n"); |
| 2369 | printk(" card line flags = %d %d %x\n", |
| 2370 | info->card, info->line, info->flags); |
| 2371 | printk(" *tty read_status_mask timeout xmit_fifo_size = %lx %x %x %x\n", |
| 2372 | (long)info->tty, info->read_status_mask, |
| 2373 | info->timeout, info->xmit_fifo_size); |
| 2374 | printk(" cor1,cor2,cor3,cor4,cor5,cor6,cor7 = %x %x %x %x %x %x %x\n", |
| 2375 | info->cor1, info->cor2, info->cor3, info->cor4, info->cor5, |
| 2376 | info->cor6, info->cor7); |
| 2377 | printk(" tbpr,tco,rbpr,rco = %d %d %d %d\n", |
| 2378 | info->tbpr, info->tco, info->rbpr, info->rco); |
| 2379 | printk(" close_delay event count = %d %d %d\n", |
| 2380 | info->close_delay, info->event, info->count); |
| 2381 | printk(" x_char blocked_open = %x %x\n", |
| 2382 | info->x_char, info->blocked_open); |
| 2383 | printk(" open_wait = %lx %lx %lx\n", |
| 2384 | (long)info->open_wait); |
| 2385 | |
| 2386 | |
| 2387 | local_irq_save(flags); |
| 2388 | |
| 2389 | /* Global Registers */ |
| 2390 | |
| 2391 | printk(" CyGFRCR %x\n", base_addr[CyGFRCR]); |
| 2392 | printk(" CyCAR %x\n", base_addr[CyCAR]); |
| 2393 | printk(" CyRISR %x\n", base_addr[CyRISR]); |
| 2394 | printk(" CyTISR %x\n", base_addr[CyTISR]); |
| 2395 | printk(" CyMISR %x\n", base_addr[CyMISR]); |
| 2396 | printk(" CyRIR %x\n", base_addr[CyRIR]); |
| 2397 | printk(" CyTIR %x\n", base_addr[CyTIR]); |
| 2398 | printk(" CyMIR %x\n", base_addr[CyMIR]); |
| 2399 | printk(" CyTPR %x\n", base_addr[CyTPR]); |
| 2400 | |
| 2401 | base_addr[CyCAR] = (u_char)channel; |
| 2402 | |
| 2403 | /* Virtual Registers */ |
| 2404 | |
| 2405 | #if 0 |
| 2406 | printk(" CyRIVR %x\n", base_addr[CyRIVR]); |
| 2407 | printk(" CyTIVR %x\n", base_addr[CyTIVR]); |
| 2408 | printk(" CyMIVR %x\n", base_addr[CyMIVR]); |
| 2409 | printk(" CyMISR %x\n", base_addr[CyMISR]); |
| 2410 | #endif |
| 2411 | |
| 2412 | /* Channel Registers */ |
| 2413 | |
| 2414 | printk(" CyCCR %x\n", base_addr[CyCCR]); |
| 2415 | printk(" CyIER %x\n", base_addr[CyIER]); |
| 2416 | printk(" CyCOR1 %x\n", base_addr[CyCOR1]); |
| 2417 | printk(" CyCOR2 %x\n", base_addr[CyCOR2]); |
| 2418 | printk(" CyCOR3 %x\n", base_addr[CyCOR3]); |
| 2419 | printk(" CyCOR4 %x\n", base_addr[CyCOR4]); |
| 2420 | printk(" CyCOR5 %x\n", base_addr[CyCOR5]); |
| 2421 | #if 0 |
| 2422 | printk(" CyCCSR %x\n", base_addr[CyCCSR]); |
| 2423 | printk(" CyRDCR %x\n", base_addr[CyRDCR]); |
| 2424 | #endif |
| 2425 | printk(" CySCHR1 %x\n", base_addr[CySCHR1]); |
| 2426 | printk(" CySCHR2 %x\n", base_addr[CySCHR2]); |
| 2427 | #if 0 |
| 2428 | printk(" CySCHR3 %x\n", base_addr[CySCHR3]); |
| 2429 | printk(" CySCHR4 %x\n", base_addr[CySCHR4]); |
| 2430 | printk(" CySCRL %x\n", base_addr[CySCRL]); |
| 2431 | printk(" CySCRH %x\n", base_addr[CySCRH]); |
| 2432 | printk(" CyLNC %x\n", base_addr[CyLNC]); |
| 2433 | printk(" CyMCOR1 %x\n", base_addr[CyMCOR1]); |
| 2434 | printk(" CyMCOR2 %x\n", base_addr[CyMCOR2]); |
| 2435 | #endif |
| 2436 | printk(" CyRTPRL %x\n", base_addr[CyRTPRL]); |
| 2437 | printk(" CyRTPRH %x\n", base_addr[CyRTPRH]); |
| 2438 | printk(" CyMSVR1 %x\n", base_addr[CyMSVR1]); |
| 2439 | printk(" CyMSVR2 %x\n", base_addr[CyMSVR2]); |
| 2440 | printk(" CyRBPR %x\n", base_addr[CyRBPR]); |
| 2441 | printk(" CyRCOR %x\n", base_addr[CyRCOR]); |
| 2442 | printk(" CyTBPR %x\n", base_addr[CyTBPR]); |
| 2443 | printk(" CyTCOR %x\n", base_addr[CyTCOR]); |
| 2444 | |
| 2445 | local_irq_restore(flags); |
| 2446 | } /* show_status */ |
| 2447 | #endif |
| 2448 | |
| 2449 | |
| 2450 | #if 0 |
| 2451 | /* Dummy routine in mvme16x/config.c for now */ |
| 2452 | |
| 2453 | /* Serial console setup. Called from linux/init/main.c */ |
| 2454 | |
| 2455 | void console_setup(char *str, int *ints) |
| 2456 | { |
| 2457 | char *s; |
| 2458 | int baud, bits, parity; |
| 2459 | int cflag = 0; |
| 2460 | |
| 2461 | /* Sanity check. */ |
| 2462 | if (ints[0] > 3 || ints[1] > 3) return; |
| 2463 | |
| 2464 | /* Get baud, bits and parity */ |
| 2465 | baud = 2400; |
| 2466 | bits = 8; |
| 2467 | parity = 'n'; |
| 2468 | if (ints[2]) baud = ints[2]; |
| 2469 | if ((s = strchr(str, ','))) { |
| 2470 | do { |
| 2471 | s++; |
| 2472 | } while(*s >= '0' && *s <= '9'); |
| 2473 | if (*s) parity = *s++; |
| 2474 | if (*s) bits = *s - '0'; |
| 2475 | } |
| 2476 | |
| 2477 | /* Now construct a cflag setting. */ |
| 2478 | switch(baud) { |
| 2479 | case 1200: |
| 2480 | cflag |= B1200; |
| 2481 | break; |
| 2482 | case 9600: |
| 2483 | cflag |= B9600; |
| 2484 | break; |
| 2485 | case 19200: |
| 2486 | cflag |= B19200; |
| 2487 | break; |
| 2488 | case 38400: |
| 2489 | cflag |= B38400; |
| 2490 | break; |
| 2491 | case 2400: |
| 2492 | default: |
| 2493 | cflag |= B2400; |
| 2494 | break; |
| 2495 | } |
| 2496 | switch(bits) { |
| 2497 | case 7: |
| 2498 | cflag |= CS7; |
| 2499 | break; |
| 2500 | default: |
| 2501 | case 8: |
| 2502 | cflag |= CS8; |
| 2503 | break; |
| 2504 | } |
| 2505 | switch(parity) { |
| 2506 | case 'o': case 'O': |
| 2507 | cflag |= PARODD; |
| 2508 | break; |
| 2509 | case 'e': case 'E': |
| 2510 | cflag |= PARENB; |
| 2511 | break; |
| 2512 | } |
| 2513 | |
| 2514 | serial_console_info = &cy_port[ints[1]]; |
| 2515 | serial_console_cflag = cflag; |
| 2516 | serial_console = ints[1] + 64; /*callout_driver.minor_start*/ |
| 2517 | } |
| 2518 | #endif |
| 2519 | |
| 2520 | /* |
| 2521 | * The following is probably out of date for 2.1.x serial console stuff. |
| 2522 | * |
| 2523 | * The console is registered early on from arch/m68k/kernel/setup.c, and |
| 2524 | * it therefore relies on the chip being setup correctly by 166-Bug. This |
| 2525 | * seems reasonable, as the serial port has been used to invoke the system |
| 2526 | * boot. It also means that this function must not rely on any data |
| 2527 | * initialisation performed by serial167_init() etc. |
| 2528 | * |
| 2529 | * Of course, once the console has been registered, we had better ensure |
| 2530 | * that serial167_init() doesn't leave the chip non-functional. |
| 2531 | * |
| 2532 | * The console must be locked when we get here. |
| 2533 | */ |
| 2534 | |
| 2535 | void serial167_console_write(struct console *co, const char *str, unsigned count) |
| 2536 | { |
| 2537 | volatile unsigned char *base_addr = (u_char *)BASE_ADDR; |
| 2538 | unsigned long flags; |
| 2539 | volatile u_char sink; |
| 2540 | u_char ier; |
| 2541 | int port; |
| 2542 | u_char do_lf = 0; |
| 2543 | int i = 0; |
| 2544 | |
| 2545 | local_irq_save(flags); |
| 2546 | |
| 2547 | /* Ensure transmitter is enabled! */ |
| 2548 | |
| 2549 | port = 0; |
| 2550 | base_addr[CyCAR] = (u_char)port; |
| 2551 | while (base_addr[CyCCR]) |
| 2552 | ; |
| 2553 | base_addr[CyCCR] = CyENB_XMTR; |
| 2554 | |
| 2555 | ier = base_addr[CyIER]; |
| 2556 | base_addr[CyIER] = CyTxMpty; |
| 2557 | |
| 2558 | while (1) { |
| 2559 | if (pcc2chip[PccSCCTICR] & 0x20) |
| 2560 | { |
| 2561 | /* We have a Tx int. Acknowledge it */ |
| 2562 | sink = pcc2chip[PccTPIACKR]; |
| 2563 | if ((base_addr[CyLICR] >> 2) == port) { |
| 2564 | if (i == count) { |
| 2565 | /* Last char of string is now output */ |
| 2566 | base_addr[CyTEOIR] = CyNOTRANS; |
| 2567 | break; |
| 2568 | } |
| 2569 | if (do_lf) { |
| 2570 | base_addr[CyTDR] = '\n'; |
| 2571 | str++; |
| 2572 | i++; |
| 2573 | do_lf = 0; |
| 2574 | } |
| 2575 | else if (*str == '\n') { |
| 2576 | base_addr[CyTDR] = '\r'; |
| 2577 | do_lf = 1; |
| 2578 | } |
| 2579 | else { |
| 2580 | base_addr[CyTDR] = *str++; |
| 2581 | i++; |
| 2582 | } |
| 2583 | base_addr[CyTEOIR] = 0; |
| 2584 | } |
| 2585 | else |
| 2586 | base_addr[CyTEOIR] = CyNOTRANS; |
| 2587 | } |
| 2588 | } |
| 2589 | |
| 2590 | base_addr[CyIER] = ier; |
| 2591 | |
| 2592 | local_irq_restore(flags); |
| 2593 | } |
| 2594 | |
| 2595 | static struct tty_driver *serial167_console_device(struct console *c, int *index) |
| 2596 | { |
| 2597 | *index = c->index; |
| 2598 | return cy_serial_driver; |
| 2599 | } |
| 2600 | |
| 2601 | |
| 2602 | static int __init serial167_console_setup(struct console *co, char *options) |
| 2603 | { |
| 2604 | return 0; |
| 2605 | } |
| 2606 | |
| 2607 | |
| 2608 | static struct console sercons = { |
| 2609 | .name = "ttyS", |
| 2610 | .write = serial167_console_write, |
| 2611 | .device = serial167_console_device, |
| 2612 | .setup = serial167_console_setup, |
| 2613 | .flags = CON_PRINTBUFFER, |
| 2614 | .index = -1, |
| 2615 | }; |
| 2616 | |
| 2617 | |
| 2618 | static int __init serial167_console_init(void) |
| 2619 | { |
| 2620 | if (vme_brdtype == VME_TYPE_MVME166 || |
| 2621 | vme_brdtype == VME_TYPE_MVME167 || |
| 2622 | vme_brdtype == VME_TYPE_MVME177) { |
| 2623 | mvme167_serial_console_setup(0); |
| 2624 | register_console(&sercons); |
| 2625 | } |
| 2626 | return 0; |
| 2627 | } |
| 2628 | console_initcall(serial167_console_init); |
| 2629 | |
| 2630 | #ifdef CONFIG_REMOTE_DEBUG |
| 2631 | void putDebugChar (int c) |
| 2632 | { |
| 2633 | volatile unsigned char *base_addr = (u_char *)BASE_ADDR; |
| 2634 | unsigned long flags; |
| 2635 | volatile u_char sink; |
| 2636 | u_char ier; |
| 2637 | int port; |
| 2638 | |
| 2639 | local_irq_save(flags); |
| 2640 | |
| 2641 | /* Ensure transmitter is enabled! */ |
| 2642 | |
| 2643 | port = DEBUG_PORT; |
| 2644 | base_addr[CyCAR] = (u_char)port; |
| 2645 | while (base_addr[CyCCR]) |
| 2646 | ; |
| 2647 | base_addr[CyCCR] = CyENB_XMTR; |
| 2648 | |
| 2649 | ier = base_addr[CyIER]; |
| 2650 | base_addr[CyIER] = CyTxMpty; |
| 2651 | |
| 2652 | while (1) { |
| 2653 | if (pcc2chip[PccSCCTICR] & 0x20) |
| 2654 | { |
| 2655 | /* We have a Tx int. Acknowledge it */ |
| 2656 | sink = pcc2chip[PccTPIACKR]; |
| 2657 | if ((base_addr[CyLICR] >> 2) == port) { |
| 2658 | base_addr[CyTDR] = c; |
| 2659 | base_addr[CyTEOIR] = 0; |
| 2660 | break; |
| 2661 | } |
| 2662 | else |
| 2663 | base_addr[CyTEOIR] = CyNOTRANS; |
| 2664 | } |
| 2665 | } |
| 2666 | |
| 2667 | base_addr[CyIER] = ier; |
| 2668 | |
| 2669 | local_irq_restore(flags); |
| 2670 | } |
| 2671 | |
| 2672 | int getDebugChar() |
| 2673 | { |
| 2674 | volatile unsigned char *base_addr = (u_char *)BASE_ADDR; |
| 2675 | unsigned long flags; |
| 2676 | volatile u_char sink; |
| 2677 | u_char ier; |
| 2678 | int port; |
| 2679 | int i, c; |
| 2680 | |
| 2681 | i = debugiq.out; |
| 2682 | if (i != debugiq.in) { |
| 2683 | c = debugiq.buf[i]; |
| 2684 | if (++i == DEBUG_LEN) |
| 2685 | i = 0; |
| 2686 | debugiq.out = i; |
| 2687 | return c; |
| 2688 | } |
| 2689 | /* OK, nothing in queue, wait in poll loop */ |
| 2690 | |
| 2691 | local_irq_save(flags); |
| 2692 | |
| 2693 | /* Ensure receiver is enabled! */ |
| 2694 | |
| 2695 | port = DEBUG_PORT; |
| 2696 | base_addr[CyCAR] = (u_char)port; |
| 2697 | #if 0 |
| 2698 | while (base_addr[CyCCR]) |
| 2699 | ; |
| 2700 | base_addr[CyCCR] = CyENB_RCVR; |
| 2701 | #endif |
| 2702 | ier = base_addr[CyIER]; |
| 2703 | base_addr[CyIER] = CyRxData; |
| 2704 | |
| 2705 | while (1) { |
| 2706 | if (pcc2chip[PccSCCRICR] & 0x20) |
| 2707 | { |
| 2708 | /* We have a Rx int. Acknowledge it */ |
| 2709 | sink = pcc2chip[PccRPIACKR]; |
| 2710 | if ((base_addr[CyLICR] >> 2) == port) { |
| 2711 | int cnt = base_addr[CyRFOC]; |
| 2712 | while (cnt-- > 0) |
| 2713 | { |
| 2714 | c = base_addr[CyRDR]; |
| 2715 | if (c == 0) |
| 2716 | printk ("!! debug char is null (cnt=%d) !!", cnt); |
| 2717 | else |
| 2718 | queueDebugChar (c); |
| 2719 | } |
| 2720 | base_addr[CyREOIR] = 0; |
| 2721 | i = debugiq.out; |
| 2722 | if (i == debugiq.in) |
| 2723 | panic ("Debug input queue empty!"); |
| 2724 | c = debugiq.buf[i]; |
| 2725 | if (++i == DEBUG_LEN) |
| 2726 | i = 0; |
| 2727 | debugiq.out = i; |
| 2728 | break; |
| 2729 | } |
| 2730 | else |
| 2731 | base_addr[CyREOIR] = CyNOTRANS; |
| 2732 | } |
| 2733 | } |
| 2734 | |
| 2735 | base_addr[CyIER] = ier; |
| 2736 | |
| 2737 | local_irq_restore(flags); |
| 2738 | |
| 2739 | return (c); |
| 2740 | } |
| 2741 | |
| 2742 | void queueDebugChar (int c) |
| 2743 | { |
| 2744 | int i; |
| 2745 | |
| 2746 | i = debugiq.in; |
| 2747 | debugiq.buf[i] = c; |
| 2748 | if (++i == DEBUG_LEN) |
| 2749 | i = 0; |
| 2750 | if (i != debugiq.out) |
| 2751 | debugiq.in = i; |
| 2752 | } |
| 2753 | |
| 2754 | static void |
| 2755 | debug_setup() |
| 2756 | { |
| 2757 | unsigned long flags; |
| 2758 | volatile unsigned char *base_addr = (u_char *)BASE_ADDR; |
| 2759 | int i, cflag; |
| 2760 | |
| 2761 | cflag = B19200; |
| 2762 | |
| 2763 | local_irq_save(flags); |
| 2764 | |
| 2765 | for (i = 0; i < 4; i++) |
| 2766 | { |
| 2767 | base_addr[CyCAR] = i; |
| 2768 | base_addr[CyLICR] = i << 2; |
| 2769 | } |
| 2770 | |
| 2771 | debugiq.in = debugiq.out = 0; |
| 2772 | |
| 2773 | base_addr[CyCAR] = DEBUG_PORT; |
| 2774 | |
| 2775 | /* baud rate */ |
| 2776 | i = cflag & CBAUD; |
| 2777 | |
| 2778 | base_addr[CyIER] = 0; |
| 2779 | |
| 2780 | base_addr[CyCMR] = CyASYNC; |
| 2781 | base_addr[CyLICR] = DEBUG_PORT << 2; |
| 2782 | base_addr[CyLIVR] = 0x5c; |
| 2783 | |
| 2784 | /* tx and rx baud rate */ |
| 2785 | |
| 2786 | base_addr[CyTCOR] = baud_co[i]; |
| 2787 | base_addr[CyTBPR] = baud_bpr[i]; |
| 2788 | base_addr[CyRCOR] = baud_co[i] >> 5; |
| 2789 | base_addr[CyRBPR] = baud_bpr[i]; |
| 2790 | |
| 2791 | /* set line characteristics according configuration */ |
| 2792 | |
| 2793 | base_addr[CySCHR1] = 0; |
| 2794 | base_addr[CySCHR2] = 0; |
| 2795 | base_addr[CySCRL] = 0; |
| 2796 | base_addr[CySCRH] = 0; |
| 2797 | base_addr[CyCOR1] = Cy_8_BITS | CyPARITY_NONE; |
| 2798 | base_addr[CyCOR2] = 0; |
| 2799 | base_addr[CyCOR3] = Cy_1_STOP; |
| 2800 | base_addr[CyCOR4] = baud_cor4[i]; |
| 2801 | base_addr[CyCOR5] = 0; |
| 2802 | base_addr[CyCOR6] = 0; |
| 2803 | base_addr[CyCOR7] = 0; |
| 2804 | |
| 2805 | write_cy_cmd(base_addr,CyINIT_CHAN); |
| 2806 | write_cy_cmd(base_addr,CyENB_RCVR); |
| 2807 | |
| 2808 | base_addr[CyCAR] = DEBUG_PORT; /* !!! Is this needed? */ |
| 2809 | |
| 2810 | base_addr[CyRTPRL] = 2; |
| 2811 | base_addr[CyRTPRH] = 0; |
| 2812 | |
| 2813 | base_addr[CyMSVR1] = CyRTS; |
| 2814 | base_addr[CyMSVR2] = CyDTR; |
| 2815 | |
| 2816 | base_addr[CyIER] = CyRxData; |
| 2817 | |
| 2818 | local_irq_restore(flags); |
| 2819 | |
| 2820 | } /* debug_setup */ |
| 2821 | |
| 2822 | #endif |
| 2823 | |
| 2824 | MODULE_LICENSE("GPL"); |