Commit | Line | Data |
---|---|---|
1da177e4 | 1 | /* |
1da177e4 LT |
2 | * Serial driver for the amiga builtin port. |
3 | * | |
4 | * This code was created by taking serial.c version 4.30 from kernel | |
5 | * release 2.3.22, replacing all hardware related stuff with the | |
6 | * corresponding amiga hardware actions, and removing all irrelevant | |
7 | * code. As a consequence, it uses many of the constants and names | |
8 | * associated with the registers and bits of 16550 compatible UARTS - | |
9 | * but only to keep track of status, etc in the state variables. It | |
10 | * was done this was to make it easier to keep the code in line with | |
11 | * (non hardware specific) changes to serial.c. | |
12 | * | |
13 | * The port is registered with the tty driver as minor device 64, and | |
14 | * therefore other ports should should only use 65 upwards. | |
15 | * | |
16 | * Richard Lucock 28/12/99 | |
17 | * | |
18 | * Copyright (C) 1991, 1992 Linus Torvalds | |
19 | * Copyright (C) 1992, 1993, 1994, 1995, 1996, 1997, | |
20 | * 1998, 1999 Theodore Ts'o | |
21 | * | |
22 | */ | |
23 | ||
24 | /* | |
25 | * Serial driver configuration section. Here are the various options: | |
26 | * | |
27 | * SERIAL_PARANOIA_CHECK | |
28 | * Check the magic number for the async_structure where | |
29 | * ever possible. | |
30 | */ | |
31 | ||
1da177e4 LT |
32 | #include <linux/delay.h> |
33 | ||
34 | #undef SERIAL_PARANOIA_CHECK | |
35 | #define SERIAL_DO_RESTART | |
36 | ||
37 | /* Set of debugging defines */ | |
38 | ||
39 | #undef SERIAL_DEBUG_INTR | |
40 | #undef SERIAL_DEBUG_OPEN | |
41 | #undef SERIAL_DEBUG_FLOW | |
42 | #undef SERIAL_DEBUG_RS_WAIT_UNTIL_SENT | |
43 | ||
44 | /* Sanity checks */ | |
45 | ||
1da177e4 LT |
46 | #if defined(MODULE) && defined(SERIAL_DEBUG_MCOUNT) |
47 | #define DBG_CNT(s) printk("(%s): [%x] refc=%d, serc=%d, ttyc=%d -> %s\n", \ | |
01bd730d | 48 | tty->name, (info->tport.flags), serial_driver->refcount,info->count,tty->count,s) |
1da177e4 LT |
49 | #else |
50 | #define DBG_CNT(s) | |
51 | #endif | |
52 | ||
53 | /* | |
54 | * End of serial driver configuration section. | |
55 | */ | |
56 | ||
57 | #include <linux/module.h> | |
58 | ||
59 | #include <linux/types.h> | |
60 | #include <linux/serial.h> | |
1da177e4 LT |
61 | #include <linux/serial_reg.h> |
62 | static char *serial_version = "4.30"; | |
63 | ||
64 | #include <linux/errno.h> | |
65 | #include <linux/signal.h> | |
66 | #include <linux/sched.h> | |
67 | #include <linux/kernel.h> | |
68 | #include <linux/timer.h> | |
69 | #include <linux/interrupt.h> | |
70 | #include <linux/tty.h> | |
71 | #include <linux/tty_flip.h> | |
6fe18d26 | 72 | #include <linux/circ_buf.h> |
1da177e4 LT |
73 | #include <linux/console.h> |
74 | #include <linux/major.h> | |
75 | #include <linux/string.h> | |
76 | #include <linux/fcntl.h> | |
77 | #include <linux/ptrace.h> | |
78 | #include <linux/ioport.h> | |
79 | #include <linux/mm.h> | |
d594027d | 80 | #include <linux/seq_file.h> |
1da177e4 LT |
81 | #include <linux/slab.h> |
82 | #include <linux/init.h> | |
83 | #include <linux/bitops.h> | |
826e8c8c | 84 | #include <linux/platform_device.h> |
1da177e4 LT |
85 | |
86 | #include <asm/setup.h> | |
87 | ||
88 | #include <asm/system.h> | |
89 | ||
90 | #include <asm/irq.h> | |
91 | ||
92 | #include <asm/amigahw.h> | |
93 | #include <asm/amigaints.h> | |
94 | ||
6fe18d26 JS |
95 | struct serial_state { |
96 | struct tty_port tport; | |
97 | struct circ_buf xmit; | |
98 | struct async_icount icount; | |
99 | ||
100 | unsigned long port; | |
101 | int baud_base; | |
102 | int xmit_fifo_size; | |
103 | int custom_divisor; | |
104 | int read_status_mask; | |
105 | int ignore_status_mask; | |
106 | int timeout; | |
107 | int quot; | |
108 | int IER; /* Interrupt Enable Register */ | |
109 | int MCR; /* Modem control register */ | |
110 | int x_char; /* xon/xoff character */ | |
111 | }; | |
112 | ||
b4290a23 | 113 | #define custom amiga_custom |
1da177e4 LT |
114 | static char *serial_name = "Amiga-builtin serial driver"; |
115 | ||
116 | static struct tty_driver *serial_driver; | |
117 | ||
118 | /* number of characters left in xmit buffer before we ask for more */ | |
119 | #define WAKEUP_CHARS 256 | |
120 | ||
1da177e4 LT |
121 | static unsigned char current_ctl_bits; |
122 | ||
588993dd JS |
123 | static void change_speed(struct tty_struct *tty, struct serial_state *info, |
124 | struct ktermios *old); | |
1da177e4 LT |
125 | static void rs_wait_until_sent(struct tty_struct *tty, int timeout); |
126 | ||
127 | ||
128 | static struct serial_state rs_table[1]; | |
129 | ||
fe971071 | 130 | #define NR_PORTS ARRAY_SIZE(rs_table) |
1da177e4 | 131 | |
1da177e4 LT |
132 | #include <asm/uaccess.h> |
133 | ||
134 | #define serial_isroot() (capable(CAP_SYS_ADMIN)) | |
135 | ||
136 | ||
916b7656 | 137 | static inline int serial_paranoia_check(struct serial_state *info, |
1da177e4 LT |
138 | char *name, const char *routine) |
139 | { | |
140 | #ifdef SERIAL_PARANOIA_CHECK | |
141 | static const char *badmagic = | |
142 | "Warning: bad magic number for serial struct (%s) in %s\n"; | |
143 | static const char *badinfo = | |
144 | "Warning: null async_struct for (%s) in %s\n"; | |
145 | ||
146 | if (!info) { | |
147 | printk(badinfo, name, routine); | |
148 | return 1; | |
149 | } | |
150 | if (info->magic != SERIAL_MAGIC) { | |
151 | printk(badmagic, name, routine); | |
152 | return 1; | |
153 | } | |
154 | #endif | |
155 | return 0; | |
156 | } | |
157 | ||
158 | /* some serial hardware definitions */ | |
159 | #define SDR_OVRUN (1<<15) | |
160 | #define SDR_RBF (1<<14) | |
161 | #define SDR_TBE (1<<13) | |
162 | #define SDR_TSRE (1<<12) | |
163 | ||
164 | #define SERPER_PARENB (1<<15) | |
165 | ||
166 | #define AC_SETCLR (1<<15) | |
167 | #define AC_UARTBRK (1<<11) | |
168 | ||
169 | #define SER_DTR (1<<7) | |
170 | #define SER_RTS (1<<6) | |
171 | #define SER_DCD (1<<5) | |
172 | #define SER_CTS (1<<4) | |
173 | #define SER_DSR (1<<3) | |
174 | ||
175 | static __inline__ void rtsdtr_ctrl(int bits) | |
176 | { | |
177 | ciab.pra = ((bits & (SER_RTS | SER_DTR)) ^ (SER_RTS | SER_DTR)) | (ciab.pra & ~(SER_RTS | SER_DTR)); | |
178 | } | |
179 | ||
180 | /* | |
181 | * ------------------------------------------------------------ | |
182 | * rs_stop() and rs_start() | |
183 | * | |
184 | * This routines are called before setting or resetting tty->stopped. | |
185 | * They enable or disable transmitter interrupts, as necessary. | |
186 | * ------------------------------------------------------------ | |
187 | */ | |
188 | static void rs_stop(struct tty_struct *tty) | |
189 | { | |
916b7656 | 190 | struct serial_state *info = tty->driver_data; |
1da177e4 LT |
191 | unsigned long flags; |
192 | ||
193 | if (serial_paranoia_check(info, tty->name, "rs_stop")) | |
194 | return; | |
195 | ||
196 | local_irq_save(flags); | |
197 | if (info->IER & UART_IER_THRI) { | |
198 | info->IER &= ~UART_IER_THRI; | |
199 | /* disable Tx interrupt and remove any pending interrupts */ | |
200 | custom.intena = IF_TBE; | |
201 | mb(); | |
202 | custom.intreq = IF_TBE; | |
203 | mb(); | |
204 | } | |
205 | local_irq_restore(flags); | |
206 | } | |
207 | ||
208 | static void rs_start(struct tty_struct *tty) | |
209 | { | |
916b7656 | 210 | struct serial_state *info = tty->driver_data; |
1da177e4 LT |
211 | unsigned long flags; |
212 | ||
213 | if (serial_paranoia_check(info, tty->name, "rs_start")) | |
214 | return; | |
215 | ||
216 | local_irq_save(flags); | |
217 | if (info->xmit.head != info->xmit.tail | |
218 | && info->xmit.buf | |
219 | && !(info->IER & UART_IER_THRI)) { | |
220 | info->IER |= UART_IER_THRI; | |
221 | custom.intena = IF_SETCLR | IF_TBE; | |
222 | mb(); | |
223 | /* set a pending Tx Interrupt, transmitter should restart now */ | |
224 | custom.intreq = IF_SETCLR | IF_TBE; | |
225 | mb(); | |
226 | } | |
227 | local_irq_restore(flags); | |
228 | } | |
229 | ||
230 | /* | |
231 | * ---------------------------------------------------------------------- | |
232 | * | |
233 | * Here starts the interrupt handling routines. All of the following | |
234 | * subroutines are declared as inline and are folded into | |
235 | * rs_interrupt(). They were separated out for readability's sake. | |
236 | * | |
237 | * Note: rs_interrupt() is a "fast" interrupt, which means that it | |
238 | * runs with interrupts turned off. People who may want to modify | |
239 | * rs_interrupt() should try to keep the interrupt handler as fast as | |
240 | * possible. After you are done making modifications, it is not a bad | |
241 | * idea to do: | |
242 | * | |
243 | * gcc -S -DKERNEL -Wall -Wstrict-prototypes -O6 -fomit-frame-pointer serial.c | |
244 | * | |
245 | * and look at the resulting assemble code in serial.s. | |
246 | * | |
247 | * - Ted Ts'o (tytso@mit.edu), 7-Mar-93 | |
248 | * ----------------------------------------------------------------------- | |
249 | */ | |
250 | ||
916b7656 | 251 | static void receive_chars(struct serial_state *info) |
1da177e4 LT |
252 | { |
253 | int status; | |
254 | int serdatr; | |
87758791 | 255 | struct tty_struct *tty = info->tport.tty; |
33f0f88f | 256 | unsigned char ch, flag; |
1da177e4 | 257 | struct async_icount *icount; |
33f0f88f | 258 | int oe = 0; |
1da177e4 | 259 | |
916b7656 | 260 | icount = &info->icount; |
1da177e4 LT |
261 | |
262 | status = UART_LSR_DR; /* We obviously have a character! */ | |
263 | serdatr = custom.serdatr; | |
264 | mb(); | |
265 | custom.intreq = IF_RBF; | |
266 | mb(); | |
267 | ||
268 | if((serdatr & 0x1ff) == 0) | |
269 | status |= UART_LSR_BI; | |
270 | if(serdatr & SDR_OVRUN) | |
271 | status |= UART_LSR_OE; | |
272 | ||
273 | ch = serdatr & 0xff; | |
1da177e4 LT |
274 | icount->rx++; |
275 | ||
276 | #ifdef SERIAL_DEBUG_INTR | |
277 | printk("DR%02x:%02x...", ch, status); | |
278 | #endif | |
33f0f88f | 279 | flag = TTY_NORMAL; |
1da177e4 LT |
280 | |
281 | /* | |
282 | * We don't handle parity or frame errors - but I have left | |
283 | * the code in, since I'm not sure that the errors can't be | |
284 | * detected. | |
285 | */ | |
286 | ||
287 | if (status & (UART_LSR_BI | UART_LSR_PE | | |
288 | UART_LSR_FE | UART_LSR_OE)) { | |
289 | /* | |
290 | * For statistics only | |
291 | */ | |
292 | if (status & UART_LSR_BI) { | |
293 | status &= ~(UART_LSR_FE | UART_LSR_PE); | |
294 | icount->brk++; | |
295 | } else if (status & UART_LSR_PE) | |
296 | icount->parity++; | |
297 | else if (status & UART_LSR_FE) | |
298 | icount->frame++; | |
299 | if (status & UART_LSR_OE) | |
300 | icount->overrun++; | |
301 | ||
302 | /* | |
303 | * Now check to see if character should be | |
304 | * ignored, and mask off conditions which | |
305 | * should be ignored. | |
306 | */ | |
307 | if (status & info->ignore_status_mask) | |
33f0f88f | 308 | goto out; |
1da177e4 LT |
309 | |
310 | status &= info->read_status_mask; | |
311 | ||
312 | if (status & (UART_LSR_BI)) { | |
313 | #ifdef SERIAL_DEBUG_INTR | |
314 | printk("handling break...."); | |
315 | #endif | |
33f0f88f | 316 | flag = TTY_BREAK; |
01bd730d | 317 | if (info->tport.flags & ASYNC_SAK) |
1da177e4 LT |
318 | do_SAK(tty); |
319 | } else if (status & UART_LSR_PE) | |
33f0f88f | 320 | flag = TTY_PARITY; |
1da177e4 | 321 | else if (status & UART_LSR_FE) |
33f0f88f | 322 | flag = TTY_FRAME; |
1da177e4 LT |
323 | if (status & UART_LSR_OE) { |
324 | /* | |
325 | * Overrun is special, since it's | |
326 | * reported immediately, and doesn't | |
327 | * affect the current character | |
328 | */ | |
33f0f88f | 329 | oe = 1; |
1da177e4 LT |
330 | } |
331 | } | |
33f0f88f AC |
332 | tty_insert_flip_char(tty, ch, flag); |
333 | if (oe == 1) | |
334 | tty_insert_flip_char(tty, 0, TTY_OVERRUN); | |
1da177e4 | 335 | tty_flip_buffer_push(tty); |
33f0f88f AC |
336 | out: |
337 | return; | |
1da177e4 LT |
338 | } |
339 | ||
916b7656 | 340 | static void transmit_chars(struct serial_state *info) |
1da177e4 LT |
341 | { |
342 | custom.intreq = IF_TBE; | |
343 | mb(); | |
344 | if (info->x_char) { | |
345 | custom.serdat = info->x_char | 0x100; | |
346 | mb(); | |
916b7656 | 347 | info->icount.tx++; |
1da177e4 LT |
348 | info->x_char = 0; |
349 | return; | |
350 | } | |
351 | if (info->xmit.head == info->xmit.tail | |
87758791 JS |
352 | || info->tport.tty->stopped |
353 | || info->tport.tty->hw_stopped) { | |
1da177e4 LT |
354 | info->IER &= ~UART_IER_THRI; |
355 | custom.intena = IF_TBE; | |
356 | mb(); | |
357 | return; | |
358 | } | |
359 | ||
360 | custom.serdat = info->xmit.buf[info->xmit.tail++] | 0x100; | |
361 | mb(); | |
362 | info->xmit.tail = info->xmit.tail & (SERIAL_XMIT_SIZE-1); | |
916b7656 | 363 | info->icount.tx++; |
1da177e4 LT |
364 | |
365 | if (CIRC_CNT(info->xmit.head, | |
366 | info->xmit.tail, | |
367 | SERIAL_XMIT_SIZE) < WAKEUP_CHARS) | |
87758791 | 368 | tty_wakeup(info->tport.tty); |
1da177e4 LT |
369 | |
370 | #ifdef SERIAL_DEBUG_INTR | |
371 | printk("THRE..."); | |
372 | #endif | |
373 | if (info->xmit.head == info->xmit.tail) { | |
374 | custom.intena = IF_TBE; | |
375 | mb(); | |
376 | info->IER &= ~UART_IER_THRI; | |
377 | } | |
378 | } | |
379 | ||
916b7656 | 380 | static void check_modem_status(struct serial_state *info) |
1da177e4 | 381 | { |
7188dc20 | 382 | struct tty_port *port = &info->tport; |
1da177e4 LT |
383 | unsigned char status = ciab.pra & (SER_DCD | SER_CTS | SER_DSR); |
384 | unsigned char dstatus; | |
385 | struct async_icount *icount; | |
386 | ||
387 | /* Determine bits that have changed */ | |
388 | dstatus = status ^ current_ctl_bits; | |
389 | current_ctl_bits = status; | |
390 | ||
391 | if (dstatus) { | |
916b7656 | 392 | icount = &info->icount; |
1da177e4 LT |
393 | /* update input line counters */ |
394 | if (dstatus & SER_DSR) | |
395 | icount->dsr++; | |
396 | if (dstatus & SER_DCD) { | |
397 | icount->dcd++; | |
398 | #ifdef CONFIG_HARD_PPS | |
7188dc20 | 399 | if ((port->flags & ASYNC_HARDPPS_CD) && |
1da177e4 LT |
400 | !(status & SER_DCD)) |
401 | hardpps(); | |
402 | #endif | |
403 | } | |
404 | if (dstatus & SER_CTS) | |
405 | icount->cts++; | |
7188dc20 | 406 | wake_up_interruptible(&port->delta_msr_wait); |
1da177e4 LT |
407 | } |
408 | ||
7188dc20 | 409 | if ((port->flags & ASYNC_CHECK_CD) && (dstatus & SER_DCD)) { |
1da177e4 LT |
410 | #if (defined(SERIAL_DEBUG_OPEN) || defined(SERIAL_DEBUG_INTR)) |
411 | printk("ttyS%d CD now %s...", info->line, | |
412 | (!(status & SER_DCD)) ? "on" : "off"); | |
413 | #endif | |
414 | if (!(status & SER_DCD)) | |
7188dc20 | 415 | wake_up_interruptible(&port->open_wait); |
1da177e4 LT |
416 | else { |
417 | #ifdef SERIAL_DEBUG_OPEN | |
418 | printk("doing serial hangup..."); | |
419 | #endif | |
7188dc20 JS |
420 | if (port->tty) |
421 | tty_hangup(port->tty); | |
1da177e4 LT |
422 | } |
423 | } | |
7188dc20 JS |
424 | if (port->flags & ASYNC_CTS_FLOW) { |
425 | if (port->tty->hw_stopped) { | |
1da177e4 LT |
426 | if (!(status & SER_CTS)) { |
427 | #if (defined(SERIAL_DEBUG_INTR) || defined(SERIAL_DEBUG_FLOW)) | |
428 | printk("CTS tx start..."); | |
429 | #endif | |
7188dc20 | 430 | port->tty->hw_stopped = 0; |
1da177e4 LT |
431 | info->IER |= UART_IER_THRI; |
432 | custom.intena = IF_SETCLR | IF_TBE; | |
433 | mb(); | |
434 | /* set a pending Tx Interrupt, transmitter should restart now */ | |
435 | custom.intreq = IF_SETCLR | IF_TBE; | |
436 | mb(); | |
7188dc20 | 437 | tty_wakeup(port->tty); |
1da177e4 LT |
438 | return; |
439 | } | |
440 | } else { | |
441 | if ((status & SER_CTS)) { | |
442 | #if (defined(SERIAL_DEBUG_INTR) || defined(SERIAL_DEBUG_FLOW)) | |
443 | printk("CTS tx stop..."); | |
444 | #endif | |
7188dc20 | 445 | port->tty->hw_stopped = 1; |
1da177e4 LT |
446 | info->IER &= ~UART_IER_THRI; |
447 | /* disable Tx interrupt and remove any pending interrupts */ | |
448 | custom.intena = IF_TBE; | |
449 | mb(); | |
450 | custom.intreq = IF_TBE; | |
451 | mb(); | |
452 | } | |
453 | } | |
454 | } | |
455 | } | |
456 | ||
7d12e780 | 457 | static irqreturn_t ser_vbl_int( int irq, void *data) |
1da177e4 LT |
458 | { |
459 | /* vbl is just a periodic interrupt we tie into to update modem status */ | |
916b7656 | 460 | struct serial_state *info = data; |
1da177e4 LT |
461 | /* |
462 | * TBD - is it better to unregister from this interrupt or to | |
463 | * ignore it if MSI is clear ? | |
464 | */ | |
465 | if(info->IER & UART_IER_MSI) | |
466 | check_modem_status(info); | |
467 | return IRQ_HANDLED; | |
468 | } | |
469 | ||
7d12e780 | 470 | static irqreturn_t ser_rx_int(int irq, void *dev_id) |
1da177e4 | 471 | { |
916b7656 | 472 | struct serial_state *info = dev_id; |
1da177e4 LT |
473 | |
474 | #ifdef SERIAL_DEBUG_INTR | |
475 | printk("ser_rx_int..."); | |
476 | #endif | |
477 | ||
87758791 | 478 | if (!info->tport.tty) |
1da177e4 LT |
479 | return IRQ_NONE; |
480 | ||
481 | receive_chars(info); | |
1da177e4 LT |
482 | #ifdef SERIAL_DEBUG_INTR |
483 | printk("end.\n"); | |
484 | #endif | |
485 | return IRQ_HANDLED; | |
486 | } | |
487 | ||
7d12e780 | 488 | static irqreturn_t ser_tx_int(int irq, void *dev_id) |
1da177e4 | 489 | { |
916b7656 | 490 | struct serial_state *info = dev_id; |
1da177e4 LT |
491 | |
492 | if (custom.serdatr & SDR_TBE) { | |
493 | #ifdef SERIAL_DEBUG_INTR | |
494 | printk("ser_tx_int..."); | |
495 | #endif | |
496 | ||
87758791 | 497 | if (!info->tport.tty) |
1da177e4 LT |
498 | return IRQ_NONE; |
499 | ||
500 | transmit_chars(info); | |
1da177e4 LT |
501 | #ifdef SERIAL_DEBUG_INTR |
502 | printk("end.\n"); | |
503 | #endif | |
504 | } | |
505 | return IRQ_HANDLED; | |
506 | } | |
507 | ||
508 | /* | |
509 | * ------------------------------------------------------------------- | |
510 | * Here ends the serial interrupt routines. | |
511 | * ------------------------------------------------------------------- | |
512 | */ | |
513 | ||
1da177e4 LT |
514 | /* |
515 | * --------------------------------------------------------------- | |
516 | * Low level utility subroutines for the serial driver: routines to | |
517 | * figure out the appropriate timeout for an interrupt chain, routines | |
518 | * to initialize and startup a serial port, and routines to shutdown a | |
519 | * serial port. Useful stuff like that. | |
520 | * --------------------------------------------------------------- | |
521 | */ | |
522 | ||
588993dd | 523 | static int startup(struct tty_struct *tty, struct serial_state *info) |
1da177e4 | 524 | { |
01bd730d | 525 | struct tty_port *port = &info->tport; |
1da177e4 LT |
526 | unsigned long flags; |
527 | int retval=0; | |
528 | unsigned long page; | |
529 | ||
530 | page = get_zeroed_page(GFP_KERNEL); | |
531 | if (!page) | |
532 | return -ENOMEM; | |
533 | ||
534 | local_irq_save(flags); | |
535 | ||
01bd730d | 536 | if (port->flags & ASYNC_INITIALIZED) { |
1da177e4 LT |
537 | free_page(page); |
538 | goto errout; | |
539 | } | |
540 | ||
541 | if (info->xmit.buf) | |
542 | free_page(page); | |
543 | else | |
544 | info->xmit.buf = (unsigned char *) page; | |
545 | ||
546 | #ifdef SERIAL_DEBUG_OPEN | |
547 | printk("starting up ttys%d ...", info->line); | |
548 | #endif | |
549 | ||
550 | /* Clear anything in the input buffer */ | |
551 | ||
552 | custom.intreq = IF_RBF; | |
553 | mb(); | |
554 | ||
555 | retval = request_irq(IRQ_AMIGA_VERTB, ser_vbl_int, 0, "serial status", info); | |
556 | if (retval) { | |
557 | if (serial_isroot()) { | |
588993dd | 558 | set_bit(TTY_IO_ERROR, &tty->flags); |
1da177e4 LT |
559 | retval = 0; |
560 | } | |
561 | goto errout; | |
562 | } | |
563 | ||
564 | /* enable both Rx and Tx interrupts */ | |
565 | custom.intena = IF_SETCLR | IF_RBF | IF_TBE; | |
566 | mb(); | |
567 | info->IER = UART_IER_MSI; | |
568 | ||
569 | /* remember current state of the DCD and CTS bits */ | |
570 | current_ctl_bits = ciab.pra & (SER_DCD | SER_CTS | SER_DSR); | |
571 | ||
1da177e4 | 572 | info->MCR = 0; |
588993dd | 573 | if (C_BAUD(tty)) |
1da177e4 LT |
574 | info->MCR = SER_DTR | SER_RTS; |
575 | rtsdtr_ctrl(info->MCR); | |
576 | ||
588993dd | 577 | clear_bit(TTY_IO_ERROR, &tty->flags); |
1da177e4 LT |
578 | info->xmit.head = info->xmit.tail = 0; |
579 | ||
580 | /* | |
581 | * Set up the tty->alt_speed kludge | |
582 | */ | |
01bd730d | 583 | if ((port->flags & ASYNC_SPD_MASK) == ASYNC_SPD_HI) |
588993dd | 584 | tty->alt_speed = 57600; |
01bd730d | 585 | if ((port->flags & ASYNC_SPD_MASK) == ASYNC_SPD_VHI) |
588993dd | 586 | tty->alt_speed = 115200; |
01bd730d | 587 | if ((port->flags & ASYNC_SPD_MASK) == ASYNC_SPD_SHI) |
588993dd | 588 | tty->alt_speed = 230400; |
01bd730d | 589 | if ((port->flags & ASYNC_SPD_MASK) == ASYNC_SPD_WARP) |
588993dd | 590 | tty->alt_speed = 460800; |
1da177e4 LT |
591 | |
592 | /* | |
593 | * and set the speed of the serial port | |
594 | */ | |
588993dd | 595 | change_speed(tty, info, NULL); |
1da177e4 | 596 | |
01bd730d | 597 | port->flags |= ASYNC_INITIALIZED; |
1da177e4 LT |
598 | local_irq_restore(flags); |
599 | return 0; | |
600 | ||
601 | errout: | |
602 | local_irq_restore(flags); | |
603 | return retval; | |
604 | } | |
605 | ||
606 | /* | |
607 | * This routine will shutdown a serial port; interrupts are disabled, and | |
608 | * DTR is dropped if the hangup on close termio flag is on. | |
609 | */ | |
588993dd | 610 | static void shutdown(struct tty_struct *tty, struct serial_state *info) |
1da177e4 LT |
611 | { |
612 | unsigned long flags; | |
613 | struct serial_state *state; | |
614 | ||
01bd730d | 615 | if (!(info->tport.flags & ASYNC_INITIALIZED)) |
1da177e4 LT |
616 | return; |
617 | ||
916b7656 | 618 | state = info; |
1da177e4 LT |
619 | |
620 | #ifdef SERIAL_DEBUG_OPEN | |
621 | printk("Shutting down serial port %d ....\n", info->line); | |
622 | #endif | |
623 | ||
624 | local_irq_save(flags); /* Disable interrupts */ | |
625 | ||
626 | /* | |
627 | * clear delta_msr_wait queue to avoid mem leaks: we may free the irq | |
628 | * here so the queue might never be waken up | |
629 | */ | |
87758791 | 630 | wake_up_interruptible(&info->tport.delta_msr_wait); |
1da177e4 | 631 | |
1da177e4 LT |
632 | /* |
633 | * Free the IRQ, if necessary | |
634 | */ | |
635 | free_irq(IRQ_AMIGA_VERTB, info); | |
636 | ||
637 | if (info->xmit.buf) { | |
638 | free_page((unsigned long) info->xmit.buf); | |
639 | info->xmit.buf = NULL; | |
640 | } | |
641 | ||
642 | info->IER = 0; | |
643 | custom.intena = IF_RBF | IF_TBE; | |
644 | mb(); | |
645 | ||
646 | /* disable break condition */ | |
647 | custom.adkcon = AC_UARTBRK; | |
648 | mb(); | |
649 | ||
588993dd | 650 | if (tty->termios->c_cflag & HUPCL) |
1da177e4 LT |
651 | info->MCR &= ~(SER_DTR|SER_RTS); |
652 | rtsdtr_ctrl(info->MCR); | |
653 | ||
588993dd | 654 | set_bit(TTY_IO_ERROR, &tty->flags); |
1da177e4 | 655 | |
01bd730d | 656 | info->tport.flags &= ~ASYNC_INITIALIZED; |
1da177e4 LT |
657 | local_irq_restore(flags); |
658 | } | |
659 | ||
660 | ||
661 | /* | |
662 | * This routine is called to set the UART divisor registers to match | |
663 | * the specified baud rate for a serial port. | |
664 | */ | |
588993dd | 665 | static void change_speed(struct tty_struct *tty, struct serial_state *info, |
606d099c | 666 | struct ktermios *old_termios) |
1da177e4 | 667 | { |
01bd730d | 668 | struct tty_port *port = &info->tport; |
1da177e4 LT |
669 | int quot = 0, baud_base, baud; |
670 | unsigned cflag, cval = 0; | |
671 | int bits; | |
672 | unsigned long flags; | |
673 | ||
588993dd | 674 | cflag = tty->termios->c_cflag; |
1da177e4 LT |
675 | |
676 | /* Byte size is always 8 bits plus parity bit if requested */ | |
677 | ||
678 | cval = 3; bits = 10; | |
679 | if (cflag & CSTOPB) { | |
680 | cval |= 0x04; | |
681 | bits++; | |
682 | } | |
683 | if (cflag & PARENB) { | |
684 | cval |= UART_LCR_PARITY; | |
685 | bits++; | |
686 | } | |
687 | if (!(cflag & PARODD)) | |
688 | cval |= UART_LCR_EPAR; | |
689 | #ifdef CMSPAR | |
690 | if (cflag & CMSPAR) | |
691 | cval |= UART_LCR_SPAR; | |
692 | #endif | |
693 | ||
694 | /* Determine divisor based on baud rate */ | |
588993dd | 695 | baud = tty_get_baud_rate(tty); |
1da177e4 LT |
696 | if (!baud) |
697 | baud = 9600; /* B0 transition handled in rs_set_termios */ | |
916b7656 | 698 | baud_base = info->baud_base; |
01bd730d | 699 | if (baud == 38400 && (port->flags & ASYNC_SPD_MASK) == ASYNC_SPD_CUST) |
916b7656 | 700 | quot = info->custom_divisor; |
1da177e4 LT |
701 | else { |
702 | if (baud == 134) | |
703 | /* Special case since 134 is really 134.5 */ | |
704 | quot = (2*baud_base / 269); | |
705 | else if (baud) | |
706 | quot = baud_base / baud; | |
707 | } | |
708 | /* If the quotient is zero refuse the change */ | |
709 | if (!quot && old_termios) { | |
db0ef08e | 710 | /* FIXME: Will need updating for new tty in the end */ |
588993dd JS |
711 | tty->termios->c_cflag &= ~CBAUD; |
712 | tty->termios->c_cflag |= (old_termios->c_cflag & CBAUD); | |
713 | baud = tty_get_baud_rate(tty); | |
1da177e4 LT |
714 | if (!baud) |
715 | baud = 9600; | |
716 | if (baud == 38400 && | |
01bd730d | 717 | (port->flags & ASYNC_SPD_MASK) == ASYNC_SPD_CUST) |
916b7656 | 718 | quot = info->custom_divisor; |
1da177e4 LT |
719 | else { |
720 | if (baud == 134) | |
721 | /* Special case since 134 is really 134.5 */ | |
722 | quot = (2*baud_base / 269); | |
723 | else if (baud) | |
724 | quot = baud_base / baud; | |
725 | } | |
726 | } | |
727 | /* As a last resort, if the quotient is zero, default to 9600 bps */ | |
728 | if (!quot) | |
729 | quot = baud_base / 9600; | |
730 | info->quot = quot; | |
916b7656 | 731 | info->timeout = ((info->xmit_fifo_size*HZ*bits*quot) / baud_base); |
1da177e4 LT |
732 | info->timeout += HZ/50; /* Add .02 seconds of slop */ |
733 | ||
734 | /* CTS flow control flag and modem status interrupts */ | |
735 | info->IER &= ~UART_IER_MSI; | |
01bd730d | 736 | if (port->flags & ASYNC_HARDPPS_CD) |
1da177e4 LT |
737 | info->IER |= UART_IER_MSI; |
738 | if (cflag & CRTSCTS) { | |
01bd730d | 739 | port->flags |= ASYNC_CTS_FLOW; |
1da177e4 LT |
740 | info->IER |= UART_IER_MSI; |
741 | } else | |
01bd730d | 742 | port->flags &= ~ASYNC_CTS_FLOW; |
1da177e4 | 743 | if (cflag & CLOCAL) |
01bd730d | 744 | port->flags &= ~ASYNC_CHECK_CD; |
1da177e4 | 745 | else { |
01bd730d | 746 | port->flags |= ASYNC_CHECK_CD; |
1da177e4 LT |
747 | info->IER |= UART_IER_MSI; |
748 | } | |
749 | /* TBD: | |
4b512d26 | 750 | * Does clearing IER_MSI imply that we should disable the VBL interrupt ? |
1da177e4 LT |
751 | */ |
752 | ||
753 | /* | |
754 | * Set up parity check flag | |
755 | */ | |
1da177e4 LT |
756 | |
757 | info->read_status_mask = UART_LSR_OE | UART_LSR_DR; | |
588993dd | 758 | if (I_INPCK(tty)) |
1da177e4 | 759 | info->read_status_mask |= UART_LSR_FE | UART_LSR_PE; |
588993dd | 760 | if (I_BRKINT(tty) || I_PARMRK(tty)) |
1da177e4 LT |
761 | info->read_status_mask |= UART_LSR_BI; |
762 | ||
763 | /* | |
764 | * Characters to ignore | |
765 | */ | |
766 | info->ignore_status_mask = 0; | |
588993dd | 767 | if (I_IGNPAR(tty)) |
1da177e4 | 768 | info->ignore_status_mask |= UART_LSR_PE | UART_LSR_FE; |
588993dd | 769 | if (I_IGNBRK(tty)) { |
1da177e4 LT |
770 | info->ignore_status_mask |= UART_LSR_BI; |
771 | /* | |
772 | * If we're ignore parity and break indicators, ignore | |
773 | * overruns too. (For real raw support). | |
774 | */ | |
588993dd | 775 | if (I_IGNPAR(tty)) |
1da177e4 LT |
776 | info->ignore_status_mask |= UART_LSR_OE; |
777 | } | |
778 | /* | |
779 | * !!! ignore all characters if CREAD is not set | |
780 | */ | |
781 | if ((cflag & CREAD) == 0) | |
782 | info->ignore_status_mask |= UART_LSR_DR; | |
783 | local_irq_save(flags); | |
784 | ||
785 | { | |
786 | short serper; | |
787 | ||
788 | /* Set up the baud rate */ | |
789 | serper = quot - 1; | |
790 | ||
791 | /* Enable or disable parity bit */ | |
792 | ||
793 | if(cval & UART_LCR_PARITY) | |
794 | serper |= (SERPER_PARENB); | |
795 | ||
796 | custom.serper = serper; | |
797 | mb(); | |
798 | } | |
799 | ||
1da177e4 LT |
800 | local_irq_restore(flags); |
801 | } | |
802 | ||
257afa3c | 803 | static int rs_put_char(struct tty_struct *tty, unsigned char ch) |
1da177e4 | 804 | { |
916b7656 | 805 | struct serial_state *info; |
1da177e4 LT |
806 | unsigned long flags; |
807 | ||
d9ad7ef1 TJRMI |
808 | info = tty->driver_data; |
809 | ||
1da177e4 | 810 | if (serial_paranoia_check(info, tty->name, "rs_put_char")) |
257afa3c | 811 | return 0; |
1da177e4 | 812 | |
d9ad7ef1 | 813 | if (!info->xmit.buf) |
257afa3c | 814 | return 0; |
1da177e4 LT |
815 | |
816 | local_irq_save(flags); | |
817 | if (CIRC_SPACE(info->xmit.head, | |
818 | info->xmit.tail, | |
819 | SERIAL_XMIT_SIZE) == 0) { | |
820 | local_irq_restore(flags); | |
257afa3c | 821 | return 0; |
1da177e4 LT |
822 | } |
823 | ||
824 | info->xmit.buf[info->xmit.head++] = ch; | |
825 | info->xmit.head &= SERIAL_XMIT_SIZE-1; | |
826 | local_irq_restore(flags); | |
257afa3c | 827 | return 1; |
1da177e4 LT |
828 | } |
829 | ||
830 | static void rs_flush_chars(struct tty_struct *tty) | |
831 | { | |
916b7656 | 832 | struct serial_state *info = tty->driver_data; |
1da177e4 LT |
833 | unsigned long flags; |
834 | ||
835 | if (serial_paranoia_check(info, tty->name, "rs_flush_chars")) | |
836 | return; | |
837 | ||
838 | if (info->xmit.head == info->xmit.tail | |
839 | || tty->stopped | |
840 | || tty->hw_stopped | |
841 | || !info->xmit.buf) | |
842 | return; | |
843 | ||
844 | local_irq_save(flags); | |
845 | info->IER |= UART_IER_THRI; | |
846 | custom.intena = IF_SETCLR | IF_TBE; | |
847 | mb(); | |
848 | /* set a pending Tx Interrupt, transmitter should restart now */ | |
849 | custom.intreq = IF_SETCLR | IF_TBE; | |
850 | mb(); | |
851 | local_irq_restore(flags); | |
852 | } | |
853 | ||
854 | static int rs_write(struct tty_struct * tty, const unsigned char *buf, int count) | |
855 | { | |
856 | int c, ret = 0; | |
916b7656 | 857 | struct serial_state *info = tty->driver_data; |
1da177e4 LT |
858 | unsigned long flags; |
859 | ||
860 | if (serial_paranoia_check(info, tty->name, "rs_write")) | |
861 | return 0; | |
862 | ||
b3218a79 | 863 | if (!info->xmit.buf) |
1da177e4 LT |
864 | return 0; |
865 | ||
3abf3bed | 866 | local_irq_save(flags); |
1da177e4 LT |
867 | while (1) { |
868 | c = CIRC_SPACE_TO_END(info->xmit.head, | |
869 | info->xmit.tail, | |
870 | SERIAL_XMIT_SIZE); | |
871 | if (count < c) | |
872 | c = count; | |
873 | if (c <= 0) { | |
874 | break; | |
875 | } | |
876 | memcpy(info->xmit.buf + info->xmit.head, buf, c); | |
877 | info->xmit.head = ((info->xmit.head + c) & | |
878 | (SERIAL_XMIT_SIZE-1)); | |
879 | buf += c; | |
880 | count -= c; | |
881 | ret += c; | |
882 | } | |
883 | local_irq_restore(flags); | |
884 | ||
885 | if (info->xmit.head != info->xmit.tail | |
886 | && !tty->stopped | |
887 | && !tty->hw_stopped | |
888 | && !(info->IER & UART_IER_THRI)) { | |
889 | info->IER |= UART_IER_THRI; | |
890 | local_irq_disable(); | |
891 | custom.intena = IF_SETCLR | IF_TBE; | |
892 | mb(); | |
893 | /* set a pending Tx Interrupt, transmitter should restart now */ | |
894 | custom.intreq = IF_SETCLR | IF_TBE; | |
895 | mb(); | |
896 | local_irq_restore(flags); | |
897 | } | |
898 | return ret; | |
899 | } | |
900 | ||
901 | static int rs_write_room(struct tty_struct *tty) | |
902 | { | |
916b7656 | 903 | struct serial_state *info = tty->driver_data; |
1da177e4 LT |
904 | |
905 | if (serial_paranoia_check(info, tty->name, "rs_write_room")) | |
906 | return 0; | |
907 | return CIRC_SPACE(info->xmit.head, info->xmit.tail, SERIAL_XMIT_SIZE); | |
908 | } | |
909 | ||
910 | static int rs_chars_in_buffer(struct tty_struct *tty) | |
911 | { | |
916b7656 | 912 | struct serial_state *info = tty->driver_data; |
1da177e4 LT |
913 | |
914 | if (serial_paranoia_check(info, tty->name, "rs_chars_in_buffer")) | |
915 | return 0; | |
916 | return CIRC_CNT(info->xmit.head, info->xmit.tail, SERIAL_XMIT_SIZE); | |
917 | } | |
918 | ||
919 | static void rs_flush_buffer(struct tty_struct *tty) | |
920 | { | |
916b7656 | 921 | struct serial_state *info = tty->driver_data; |
1da177e4 LT |
922 | unsigned long flags; |
923 | ||
924 | if (serial_paranoia_check(info, tty->name, "rs_flush_buffer")) | |
925 | return; | |
926 | local_irq_save(flags); | |
927 | info->xmit.head = info->xmit.tail = 0; | |
928 | local_irq_restore(flags); | |
1da177e4 LT |
929 | tty_wakeup(tty); |
930 | } | |
931 | ||
932 | /* | |
933 | * This function is used to send a high-priority XON/XOFF character to | |
934 | * the device | |
935 | */ | |
936 | static void rs_send_xchar(struct tty_struct *tty, char ch) | |
937 | { | |
916b7656 | 938 | struct serial_state *info = tty->driver_data; |
1da177e4 LT |
939 | unsigned long flags; |
940 | ||
941 | if (serial_paranoia_check(info, tty->name, "rs_send_char")) | |
942 | return; | |
943 | ||
944 | info->x_char = ch; | |
945 | if (ch) { | |
946 | /* Make sure transmit interrupts are on */ | |
947 | ||
948 | /* Check this ! */ | |
949 | local_irq_save(flags); | |
950 | if(!(custom.intenar & IF_TBE)) { | |
951 | custom.intena = IF_SETCLR | IF_TBE; | |
952 | mb(); | |
953 | /* set a pending Tx Interrupt, transmitter should restart now */ | |
954 | custom.intreq = IF_SETCLR | IF_TBE; | |
955 | mb(); | |
956 | } | |
957 | local_irq_restore(flags); | |
958 | ||
959 | info->IER |= UART_IER_THRI; | |
960 | } | |
961 | } | |
962 | ||
963 | /* | |
964 | * ------------------------------------------------------------ | |
965 | * rs_throttle() | |
966 | * | |
967 | * This routine is called by the upper-layer tty layer to signal that | |
968 | * incoming characters should be throttled. | |
969 | * ------------------------------------------------------------ | |
970 | */ | |
971 | static void rs_throttle(struct tty_struct * tty) | |
972 | { | |
916b7656 | 973 | struct serial_state *info = tty->driver_data; |
1da177e4 LT |
974 | unsigned long flags; |
975 | #ifdef SERIAL_DEBUG_THROTTLE | |
976 | char buf[64]; | |
977 | ||
978 | printk("throttle %s: %d....\n", tty_name(tty, buf), | |
979 | tty->ldisc.chars_in_buffer(tty)); | |
980 | #endif | |
981 | ||
982 | if (serial_paranoia_check(info, tty->name, "rs_throttle")) | |
983 | return; | |
984 | ||
985 | if (I_IXOFF(tty)) | |
986 | rs_send_xchar(tty, STOP_CHAR(tty)); | |
987 | ||
988 | if (tty->termios->c_cflag & CRTSCTS) | |
989 | info->MCR &= ~SER_RTS; | |
990 | ||
991 | local_irq_save(flags); | |
992 | rtsdtr_ctrl(info->MCR); | |
993 | local_irq_restore(flags); | |
994 | } | |
995 | ||
996 | static void rs_unthrottle(struct tty_struct * tty) | |
997 | { | |
916b7656 | 998 | struct serial_state *info = tty->driver_data; |
1da177e4 LT |
999 | unsigned long flags; |
1000 | #ifdef SERIAL_DEBUG_THROTTLE | |
1001 | char buf[64]; | |
1002 | ||
1003 | printk("unthrottle %s: %d....\n", tty_name(tty, buf), | |
1004 | tty->ldisc.chars_in_buffer(tty)); | |
1005 | #endif | |
1006 | ||
1007 | if (serial_paranoia_check(info, tty->name, "rs_unthrottle")) | |
1008 | return; | |
1009 | ||
1010 | if (I_IXOFF(tty)) { | |
1011 | if (info->x_char) | |
1012 | info->x_char = 0; | |
1013 | else | |
1014 | rs_send_xchar(tty, START_CHAR(tty)); | |
1015 | } | |
1016 | if (tty->termios->c_cflag & CRTSCTS) | |
1017 | info->MCR |= SER_RTS; | |
1018 | local_irq_save(flags); | |
1019 | rtsdtr_ctrl(info->MCR); | |
1020 | local_irq_restore(flags); | |
1021 | } | |
1022 | ||
1023 | /* | |
1024 | * ------------------------------------------------------------ | |
1025 | * rs_ioctl() and friends | |
1026 | * ------------------------------------------------------------ | |
1027 | */ | |
1028 | ||
ff169e5c | 1029 | static int get_serial_info(struct tty_struct *tty, struct serial_state *state, |
ab14caec | 1030 | struct serial_struct __user * retinfo) |
1da177e4 LT |
1031 | { |
1032 | struct serial_struct tmp; | |
1da177e4 LT |
1033 | |
1034 | if (!retinfo) | |
1035 | return -EFAULT; | |
1036 | memset(&tmp, 0, sizeof(tmp)); | |
ec79d605 | 1037 | tty_lock(); |
ff169e5c | 1038 | tmp.line = tty->index; |
1da177e4 | 1039 | tmp.port = state->port; |
01bd730d | 1040 | tmp.flags = state->tport.flags; |
1da177e4 LT |
1041 | tmp.xmit_fifo_size = state->xmit_fifo_size; |
1042 | tmp.baud_base = state->baud_base; | |
799be6ff JS |
1043 | tmp.close_delay = state->tport.close_delay; |
1044 | tmp.closing_wait = state->tport.closing_wait; | |
1da177e4 | 1045 | tmp.custom_divisor = state->custom_divisor; |
ec79d605 | 1046 | tty_unlock(); |
1da177e4 LT |
1047 | if (copy_to_user(retinfo,&tmp,sizeof(*retinfo))) |
1048 | return -EFAULT; | |
1049 | return 0; | |
1050 | } | |
1051 | ||
588993dd | 1052 | static int set_serial_info(struct tty_struct *tty, struct serial_state *state, |
ab14caec | 1053 | struct serial_struct __user * new_info) |
1da177e4 | 1054 | { |
01bd730d | 1055 | struct tty_port *port = &state->tport; |
1da177e4 | 1056 | struct serial_struct new_serial; |
0f9b9684 | 1057 | bool change_spd; |
1da177e4 LT |
1058 | int retval = 0; |
1059 | ||
1060 | if (copy_from_user(&new_serial,new_info,sizeof(new_serial))) | |
1061 | return -EFAULT; | |
e18ce49b | 1062 | |
ec79d605 | 1063 | tty_lock(); |
01bd730d | 1064 | change_spd = ((new_serial.flags ^ port->flags) & ASYNC_SPD_MASK) || |
0f9b9684 | 1065 | new_serial.custom_divisor != state->custom_divisor; |
ff169e5c | 1066 | if (new_serial.irq || new_serial.port != state->port || |
0f9b9684 JS |
1067 | new_serial.xmit_fifo_size != state->xmit_fifo_size) { |
1068 | tty_unlock(); | |
1069 | return -EINVAL; | |
e18ce49b | 1070 | } |
1da177e4 LT |
1071 | |
1072 | if (!serial_isroot()) { | |
1073 | if ((new_serial.baud_base != state->baud_base) || | |
01bd730d | 1074 | (new_serial.close_delay != port->close_delay) || |
1da177e4 LT |
1075 | (new_serial.xmit_fifo_size != state->xmit_fifo_size) || |
1076 | ((new_serial.flags & ~ASYNC_USR_MASK) != | |
01bd730d | 1077 | (port->flags & ~ASYNC_USR_MASK))) |
1da177e4 | 1078 | return -EPERM; |
01bd730d | 1079 | port->flags = ((port->flags & ~ASYNC_USR_MASK) | |
1da177e4 | 1080 | (new_serial.flags & ASYNC_USR_MASK)); |
1da177e4 LT |
1081 | state->custom_divisor = new_serial.custom_divisor; |
1082 | goto check_and_exit; | |
1083 | } | |
1084 | ||
e18ce49b | 1085 | if (new_serial.baud_base < 9600) { |
ec79d605 | 1086 | tty_unlock(); |
1da177e4 | 1087 | return -EINVAL; |
e18ce49b | 1088 | } |
1da177e4 LT |
1089 | |
1090 | /* | |
1091 | * OK, past this point, all the error checking has been done. | |
1092 | * At this point, we start making changes..... | |
1093 | */ | |
1094 | ||
1095 | state->baud_base = new_serial.baud_base; | |
01bd730d | 1096 | port->flags = ((port->flags & ~ASYNC_FLAGS) | |
1da177e4 | 1097 | (new_serial.flags & ASYNC_FLAGS)); |
1da177e4 | 1098 | state->custom_divisor = new_serial.custom_divisor; |
01bd730d JS |
1099 | port->close_delay = new_serial.close_delay * HZ/100; |
1100 | port->closing_wait = new_serial.closing_wait * HZ/100; | |
1101 | tty->low_latency = (port->flags & ASYNC_LOW_LATENCY) ? 1 : 0; | |
1da177e4 LT |
1102 | |
1103 | check_and_exit: | |
01bd730d | 1104 | if (port->flags & ASYNC_INITIALIZED) { |
0f9b9684 | 1105 | if (change_spd) { |
01bd730d | 1106 | if ((port->flags & ASYNC_SPD_MASK) == ASYNC_SPD_HI) |
588993dd | 1107 | tty->alt_speed = 57600; |
01bd730d | 1108 | if ((port->flags & ASYNC_SPD_MASK) == ASYNC_SPD_VHI) |
588993dd | 1109 | tty->alt_speed = 115200; |
01bd730d | 1110 | if ((port->flags & ASYNC_SPD_MASK) == ASYNC_SPD_SHI) |
588993dd | 1111 | tty->alt_speed = 230400; |
01bd730d | 1112 | if ((port->flags & ASYNC_SPD_MASK) == ASYNC_SPD_WARP) |
588993dd JS |
1113 | tty->alt_speed = 460800; |
1114 | change_speed(tty, state, NULL); | |
1da177e4 LT |
1115 | } |
1116 | } else | |
588993dd | 1117 | retval = startup(tty, state); |
ec79d605 | 1118 | tty_unlock(); |
1da177e4 LT |
1119 | return retval; |
1120 | } | |
1121 | ||
1122 | ||
1123 | /* | |
1124 | * get_lsr_info - get line status register info | |
1125 | * | |
1126 | * Purpose: Let user call ioctl() to get info when the UART physically | |
1127 | * is emptied. On bus types like RS485, the transmitter must | |
1128 | * release the bus after transmitting. This must be done when | |
1129 | * the transmit shift register is empty, not be done when the | |
1130 | * transmit holding register is empty. This functionality | |
1131 | * allows an RS485 driver to be written in user space. | |
1132 | */ | |
916b7656 | 1133 | static int get_lsr_info(struct serial_state *info, unsigned int __user *value) |
1da177e4 LT |
1134 | { |
1135 | unsigned char status; | |
1136 | unsigned int result; | |
1137 | unsigned long flags; | |
1138 | ||
1139 | local_irq_save(flags); | |
1140 | status = custom.serdatr; | |
1141 | mb(); | |
1142 | local_irq_restore(flags); | |
1143 | result = ((status & SDR_TSRE) ? TIOCSER_TEMT : 0); | |
1144 | if (copy_to_user(value, &result, sizeof(int))) | |
1145 | return -EFAULT; | |
1146 | return 0; | |
1147 | } | |
1148 | ||
1149 | ||
60b33c13 | 1150 | static int rs_tiocmget(struct tty_struct *tty) |
1da177e4 | 1151 | { |
916b7656 | 1152 | struct serial_state *info = tty->driver_data; |
1da177e4 LT |
1153 | unsigned char control, status; |
1154 | unsigned long flags; | |
1155 | ||
1156 | if (serial_paranoia_check(info, tty->name, "rs_ioctl")) | |
1157 | return -ENODEV; | |
1158 | if (tty->flags & (1 << TTY_IO_ERROR)) | |
1159 | return -EIO; | |
1160 | ||
1161 | control = info->MCR; | |
1162 | local_irq_save(flags); | |
1163 | status = ciab.pra; | |
1164 | local_irq_restore(flags); | |
1165 | return ((control & SER_RTS) ? TIOCM_RTS : 0) | |
1166 | | ((control & SER_DTR) ? TIOCM_DTR : 0) | |
1167 | | (!(status & SER_DCD) ? TIOCM_CAR : 0) | |
1168 | | (!(status & SER_DSR) ? TIOCM_DSR : 0) | |
1169 | | (!(status & SER_CTS) ? TIOCM_CTS : 0); | |
1170 | } | |
1171 | ||
20b9d177 AC |
1172 | static int rs_tiocmset(struct tty_struct *tty, unsigned int set, |
1173 | unsigned int clear) | |
1da177e4 | 1174 | { |
916b7656 | 1175 | struct serial_state *info = tty->driver_data; |
1da177e4 LT |
1176 | unsigned long flags; |
1177 | ||
1178 | if (serial_paranoia_check(info, tty->name, "rs_ioctl")) | |
1179 | return -ENODEV; | |
1180 | if (tty->flags & (1 << TTY_IO_ERROR)) | |
1181 | return -EIO; | |
1182 | ||
1183 | local_irq_save(flags); | |
1184 | if (set & TIOCM_RTS) | |
1185 | info->MCR |= SER_RTS; | |
1186 | if (set & TIOCM_DTR) | |
1187 | info->MCR |= SER_DTR; | |
1188 | if (clear & TIOCM_RTS) | |
1189 | info->MCR &= ~SER_RTS; | |
1190 | if (clear & TIOCM_DTR) | |
1191 | info->MCR &= ~SER_DTR; | |
1192 | rtsdtr_ctrl(info->MCR); | |
1193 | local_irq_restore(flags); | |
1194 | return 0; | |
1195 | } | |
1196 | ||
1197 | /* | |
1198 | * rs_break() --- routine which turns the break handling on or off | |
1199 | */ | |
9e98966c | 1200 | static int rs_break(struct tty_struct *tty, int break_state) |
1da177e4 | 1201 | { |
916b7656 | 1202 | struct serial_state *info = tty->driver_data; |
1da177e4 LT |
1203 | unsigned long flags; |
1204 | ||
1205 | if (serial_paranoia_check(info, tty->name, "rs_break")) | |
970a8a51 | 1206 | return -EINVAL; |
1da177e4 LT |
1207 | |
1208 | local_irq_save(flags); | |
1209 | if (break_state == -1) | |
1210 | custom.adkcon = AC_SETCLR | AC_UARTBRK; | |
1211 | else | |
1212 | custom.adkcon = AC_UARTBRK; | |
1213 | mb(); | |
1214 | local_irq_restore(flags); | |
9e98966c | 1215 | return 0; |
1da177e4 LT |
1216 | } |
1217 | ||
0587102c AC |
1218 | /* |
1219 | * Get counter of input serial line interrupts (DCD,RI,DSR,CTS) | |
1220 | * Return: write counters to the user passed counter struct | |
1221 | * NB: both 1->0 and 0->1 transitions are counted except for | |
1222 | * RI where only 0->1 is counted. | |
1223 | */ | |
1224 | static int rs_get_icount(struct tty_struct *tty, | |
1225 | struct serial_icounter_struct *icount) | |
1226 | { | |
916b7656 | 1227 | struct serial_state *info = tty->driver_data; |
0587102c AC |
1228 | struct async_icount cnow; |
1229 | unsigned long flags; | |
1230 | ||
1231 | local_irq_save(flags); | |
916b7656 | 1232 | cnow = info->icount; |
0587102c AC |
1233 | local_irq_restore(flags); |
1234 | icount->cts = cnow.cts; | |
1235 | icount->dsr = cnow.dsr; | |
1236 | icount->rng = cnow.rng; | |
1237 | icount->dcd = cnow.dcd; | |
1238 | icount->rx = cnow.rx; | |
1239 | icount->tx = cnow.tx; | |
1240 | icount->frame = cnow.frame; | |
1241 | icount->overrun = cnow.overrun; | |
1242 | icount->parity = cnow.parity; | |
1243 | icount->brk = cnow.brk; | |
1244 | icount->buf_overrun = cnow.buf_overrun; | |
1245 | ||
1246 | return 0; | |
1247 | } | |
1da177e4 | 1248 | |
6caa76b7 | 1249 | static int rs_ioctl(struct tty_struct *tty, |
1da177e4 LT |
1250 | unsigned int cmd, unsigned long arg) |
1251 | { | |
916b7656 | 1252 | struct serial_state *info = tty->driver_data; |
1da177e4 | 1253 | struct async_icount cprev, cnow; /* kernel counter temps */ |
ab14caec | 1254 | void __user *argp = (void __user *)arg; |
1da177e4 LT |
1255 | unsigned long flags; |
1256 | ||
1257 | if (serial_paranoia_check(info, tty->name, "rs_ioctl")) | |
1258 | return -ENODEV; | |
1259 | ||
1260 | if ((cmd != TIOCGSERIAL) && (cmd != TIOCSSERIAL) && | |
1261 | (cmd != TIOCSERCONFIG) && (cmd != TIOCSERGSTRUCT) && | |
1262 | (cmd != TIOCMIWAIT) && (cmd != TIOCGICOUNT)) { | |
1263 | if (tty->flags & (1 << TTY_IO_ERROR)) | |
1264 | return -EIO; | |
1265 | } | |
1266 | ||
1267 | switch (cmd) { | |
1268 | case TIOCGSERIAL: | |
ff169e5c | 1269 | return get_serial_info(tty, info, argp); |
1da177e4 | 1270 | case TIOCSSERIAL: |
588993dd | 1271 | return set_serial_info(tty, info, argp); |
1da177e4 LT |
1272 | case TIOCSERCONFIG: |
1273 | return 0; | |
1274 | ||
1275 | case TIOCSERGETLSR: /* Get line status register */ | |
ab14caec | 1276 | return get_lsr_info(info, argp); |
1da177e4 LT |
1277 | |
1278 | case TIOCSERGSTRUCT: | |
ab14caec | 1279 | if (copy_to_user(argp, |
916b7656 | 1280 | info, sizeof(struct serial_state))) |
1da177e4 LT |
1281 | return -EFAULT; |
1282 | return 0; | |
1283 | ||
1284 | /* | |
1285 | * Wait for any of the 4 modem inputs (DCD,RI,DSR,CTS) to change | |
1286 | * - mask passed in arg for lines of interest | |
1287 | * (use |'ed TIOCM_RNG/DSR/CD/CTS for masking) | |
1288 | * Caller should use TIOCGICOUNT to see which one it was | |
1289 | */ | |
1290 | case TIOCMIWAIT: | |
1291 | local_irq_save(flags); | |
1292 | /* note the counters on entry */ | |
916b7656 | 1293 | cprev = info->icount; |
1da177e4 LT |
1294 | local_irq_restore(flags); |
1295 | while (1) { | |
87758791 | 1296 | interruptible_sleep_on(&info->tport.delta_msr_wait); |
1da177e4 LT |
1297 | /* see if a signal did it */ |
1298 | if (signal_pending(current)) | |
1299 | return -ERESTARTSYS; | |
1300 | local_irq_save(flags); | |
916b7656 | 1301 | cnow = info->icount; /* atomic copy */ |
1da177e4 LT |
1302 | local_irq_restore(flags); |
1303 | if (cnow.rng == cprev.rng && cnow.dsr == cprev.dsr && | |
1304 | cnow.dcd == cprev.dcd && cnow.cts == cprev.cts) | |
1305 | return -EIO; /* no change => error */ | |
1306 | if ( ((arg & TIOCM_RNG) && (cnow.rng != cprev.rng)) || | |
1307 | ((arg & TIOCM_DSR) && (cnow.dsr != cprev.dsr)) || | |
1308 | ((arg & TIOCM_CD) && (cnow.dcd != cprev.dcd)) || | |
1309 | ((arg & TIOCM_CTS) && (cnow.cts != cprev.cts)) ) { | |
1310 | return 0; | |
1311 | } | |
1312 | cprev = cnow; | |
1313 | } | |
1314 | /* NOTREACHED */ | |
1315 | ||
1da177e4 LT |
1316 | case TIOCSERGWILD: |
1317 | case TIOCSERSWILD: | |
1318 | /* "setserial -W" is called in Debian boot */ | |
1319 | printk ("TIOCSER?WILD ioctl obsolete, ignored.\n"); | |
1320 | return 0; | |
1321 | ||
1322 | default: | |
1323 | return -ENOIOCTLCMD; | |
1324 | } | |
1325 | return 0; | |
1326 | } | |
1327 | ||
606d099c | 1328 | static void rs_set_termios(struct tty_struct *tty, struct ktermios *old_termios) |
1da177e4 | 1329 | { |
916b7656 | 1330 | struct serial_state *info = tty->driver_data; |
1da177e4 LT |
1331 | unsigned long flags; |
1332 | unsigned int cflag = tty->termios->c_cflag; | |
1333 | ||
588993dd | 1334 | change_speed(tty, info, old_termios); |
1da177e4 LT |
1335 | |
1336 | /* Handle transition to B0 status */ | |
1337 | if ((old_termios->c_cflag & CBAUD) && | |
1338 | !(cflag & CBAUD)) { | |
1339 | info->MCR &= ~(SER_DTR|SER_RTS); | |
1340 | local_irq_save(flags); | |
1341 | rtsdtr_ctrl(info->MCR); | |
1342 | local_irq_restore(flags); | |
1343 | } | |
1344 | ||
1345 | /* Handle transition away from B0 status */ | |
1346 | if (!(old_termios->c_cflag & CBAUD) && | |
1347 | (cflag & CBAUD)) { | |
1348 | info->MCR |= SER_DTR; | |
1349 | if (!(tty->termios->c_cflag & CRTSCTS) || | |
1350 | !test_bit(TTY_THROTTLED, &tty->flags)) { | |
1351 | info->MCR |= SER_RTS; | |
1352 | } | |
1353 | local_irq_save(flags); | |
1354 | rtsdtr_ctrl(info->MCR); | |
1355 | local_irq_restore(flags); | |
1356 | } | |
1357 | ||
1358 | /* Handle turning off CRTSCTS */ | |
1359 | if ((old_termios->c_cflag & CRTSCTS) && | |
1360 | !(tty->termios->c_cflag & CRTSCTS)) { | |
1361 | tty->hw_stopped = 0; | |
1362 | rs_start(tty); | |
1363 | } | |
1364 | ||
1365 | #if 0 | |
1366 | /* | |
1367 | * No need to wake up processes in open wait, since they | |
1368 | * sample the CLOCAL flag once, and don't recheck it. | |
1369 | * XXX It's not clear whether the current behavior is correct | |
1370 | * or not. Hence, this may change..... | |
1371 | */ | |
1372 | if (!(old_termios->c_cflag & CLOCAL) && | |
1373 | (tty->termios->c_cflag & CLOCAL)) | |
1374 | wake_up_interruptible(&info->open_wait); | |
1375 | #endif | |
1376 | } | |
1377 | ||
1378 | /* | |
1379 | * ------------------------------------------------------------ | |
1380 | * rs_close() | |
1381 | * | |
1382 | * This routine is called when the serial port gets closed. First, we | |
1383 | * wait for the last remaining data to be sent. Then, we unlink its | |
1384 | * async structure from the interrupt chain if necessary, and we free | |
1385 | * that IRQ if nothing is left in the chain. | |
1386 | * ------------------------------------------------------------ | |
1387 | */ | |
1388 | static void rs_close(struct tty_struct *tty, struct file * filp) | |
1389 | { | |
916b7656 | 1390 | struct serial_state *state = tty->driver_data; |
7188dc20 | 1391 | struct tty_port *port = &state->tport; |
1da177e4 | 1392 | |
9b937421 | 1393 | if (serial_paranoia_check(state, tty->name, "rs_close")) |
1da177e4 LT |
1394 | return; |
1395 | ||
9b937421 | 1396 | if (tty_port_close_start(port, tty, filp) == 0) |
1da177e4 | 1397 | return; |
1da177e4 | 1398 | |
1da177e4 LT |
1399 | /* |
1400 | * At this point we stop accepting input. To do this, we | |
1401 | * disable the receive line status interrupts, and tell the | |
1402 | * interrupt driver to stop checking the data ready bit in the | |
1403 | * line status register. | |
1404 | */ | |
916b7656 | 1405 | state->read_status_mask &= ~UART_LSR_DR; |
7188dc20 | 1406 | if (port->flags & ASYNC_INITIALIZED) { |
1da177e4 LT |
1407 | /* disable receive interrupts */ |
1408 | custom.intena = IF_RBF; | |
1409 | mb(); | |
1410 | /* clear any pending receive interrupt */ | |
1411 | custom.intreq = IF_RBF; | |
1412 | mb(); | |
1413 | ||
1414 | /* | |
1415 | * Before we drop DTR, make sure the UART transmitter | |
1416 | * has completely drained; this is especially | |
1417 | * important if there is a transmit FIFO! | |
1418 | */ | |
916b7656 | 1419 | rs_wait_until_sent(tty, state->timeout); |
1da177e4 | 1420 | } |
588993dd | 1421 | shutdown(tty, state); |
978e595f | 1422 | rs_flush_buffer(tty); |
1da177e4 LT |
1423 | |
1424 | tty_ldisc_flush(tty); | |
7188dc20 | 1425 | port->tty = NULL; |
b8edebe4 JS |
1426 | |
1427 | tty_port_close_end(port, tty); | |
1da177e4 LT |
1428 | } |
1429 | ||
1430 | /* | |
1431 | * rs_wait_until_sent() --- wait until the transmitter is empty | |
1432 | */ | |
1433 | static void rs_wait_until_sent(struct tty_struct *tty, int timeout) | |
1434 | { | |
916b7656 | 1435 | struct serial_state *info = tty->driver_data; |
1da177e4 LT |
1436 | unsigned long orig_jiffies, char_time; |
1437 | int lsr; | |
1438 | ||
1439 | if (serial_paranoia_check(info, tty->name, "rs_wait_until_sent")) | |
1440 | return; | |
1441 | ||
916b7656 | 1442 | if (info->xmit_fifo_size == 0) |
1da177e4 LT |
1443 | return; /* Just in case.... */ |
1444 | ||
1445 | orig_jiffies = jiffies; | |
978e595f | 1446 | |
1da177e4 LT |
1447 | /* |
1448 | * Set the check interval to be 1/5 of the estimated time to | |
1449 | * send a single character, and make it at least 1. The check | |
1450 | * interval should also be less than the timeout. | |
1451 | * | |
1452 | * Note: we have to use pretty tight timings here to satisfy | |
1453 | * the NIST-PCTS. | |
1454 | */ | |
916b7656 | 1455 | char_time = (info->timeout - HZ/50) / info->xmit_fifo_size; |
1da177e4 LT |
1456 | char_time = char_time / 5; |
1457 | if (char_time == 0) | |
1458 | char_time = 1; | |
1459 | if (timeout) | |
1460 | char_time = min_t(unsigned long, char_time, timeout); | |
1461 | /* | |
1462 | * If the transmitter hasn't cleared in twice the approximate | |
1463 | * amount of time to send the entire FIFO, it probably won't | |
1464 | * ever clear. This assumes the UART isn't doing flow | |
1465 | * control, which is currently the case. Hence, if it ever | |
1466 | * takes longer than info->timeout, this is probably due to a | |
1467 | * UART bug of some kind. So, we clamp the timeout parameter at | |
1468 | * 2*info->timeout. | |
1469 | */ | |
1470 | if (!timeout || timeout > 2*info->timeout) | |
1471 | timeout = 2*info->timeout; | |
1472 | #ifdef SERIAL_DEBUG_RS_WAIT_UNTIL_SENT | |
1473 | printk("In rs_wait_until_sent(%d) check=%lu...", timeout, char_time); | |
1474 | printk("jiff=%lu...", jiffies); | |
1475 | #endif | |
1476 | while(!((lsr = custom.serdatr) & SDR_TSRE)) { | |
1477 | #ifdef SERIAL_DEBUG_RS_WAIT_UNTIL_SENT | |
1478 | printk("serdatr = %d (jiff=%lu)...", lsr, jiffies); | |
1479 | #endif | |
1480 | msleep_interruptible(jiffies_to_msecs(char_time)); | |
1481 | if (signal_pending(current)) | |
1482 | break; | |
1483 | if (timeout && time_after(jiffies, orig_jiffies + timeout)) | |
1484 | break; | |
1485 | } | |
cc0a8fbb | 1486 | __set_current_state(TASK_RUNNING); |
eff4b0b9 | 1487 | |
1da177e4 LT |
1488 | #ifdef SERIAL_DEBUG_RS_WAIT_UNTIL_SENT |
1489 | printk("lsr = %d (jiff=%lu)...done\n", lsr, jiffies); | |
1490 | #endif | |
1491 | } | |
1492 | ||
1493 | /* | |
1494 | * rs_hangup() --- called by tty_hangup() when a hangup is signaled. | |
1495 | */ | |
1496 | static void rs_hangup(struct tty_struct *tty) | |
1497 | { | |
916b7656 | 1498 | struct serial_state *info = tty->driver_data; |
1da177e4 LT |
1499 | |
1500 | if (serial_paranoia_check(info, tty->name, "rs_hangup")) | |
1501 | return; | |
1502 | ||
1da177e4 | 1503 | rs_flush_buffer(tty); |
588993dd | 1504 | shutdown(tty, info); |
12c80354 | 1505 | info->tport.count = 0; |
01bd730d | 1506 | info->tport.flags &= ~ASYNC_NORMAL_ACTIVE; |
87758791 JS |
1507 | info->tport.tty = NULL; |
1508 | wake_up_interruptible(&info->tport.open_wait); | |
1da177e4 LT |
1509 | } |
1510 | ||
1da177e4 LT |
1511 | /* |
1512 | * This routine is called whenever a serial port is opened. It | |
1513 | * enables interrupts for a serial port, linking in its async structure into | |
1514 | * the IRQ chain. It also performs the serial-specific | |
1515 | * initialization for the tty structure. | |
1516 | */ | |
1517 | static int rs_open(struct tty_struct *tty, struct file * filp) | |
1518 | { | |
916b7656 | 1519 | struct serial_state *info = rs_table + tty->index; |
7188dc20 | 1520 | struct tty_port *port = &info->tport; |
410235fd | 1521 | int retval; |
1da177e4 | 1522 | |
7188dc20 JS |
1523 | port->count++; |
1524 | port->tty = tty; | |
916b7656 | 1525 | tty->driver_data = info; |
7188dc20 | 1526 | tty->port = port; |
1da177e4 LT |
1527 | if (serial_paranoia_check(info, tty->name, "rs_open")) |
1528 | return -ENODEV; | |
1529 | ||
7188dc20 | 1530 | tty->low_latency = (port->flags & ASYNC_LOW_LATENCY) ? 1 : 0; |
1da177e4 | 1531 | |
588993dd | 1532 | retval = startup(tty, info); |
1da177e4 LT |
1533 | if (retval) { |
1534 | return retval; | |
1535 | } | |
1536 | ||
6e1aeb03 | 1537 | return tty_port_block_til_ready(port, tty, filp); |
1da177e4 LT |
1538 | } |
1539 | ||
1540 | /* | |
1541 | * /proc fs routines.... | |
1542 | */ | |
1543 | ||
ff169e5c JS |
1544 | static inline void line_info(struct seq_file *m, int line, |
1545 | struct serial_state *state) | |
1da177e4 | 1546 | { |
1da177e4 | 1547 | char stat_buf[30], control, status; |
1da177e4 LT |
1548 | unsigned long flags; |
1549 | ||
ff169e5c | 1550 | seq_printf(m, "%d: uart:amiga_builtin", line); |
1da177e4 | 1551 | |
1da177e4 LT |
1552 | local_irq_save(flags); |
1553 | status = ciab.pra; | |
01bd730d | 1554 | control = (state->tport.flags & ASYNC_INITIALIZED) ? state->MCR : status; |
1da177e4 LT |
1555 | local_irq_restore(flags); |
1556 | ||
1557 | stat_buf[0] = 0; | |
1558 | stat_buf[1] = 0; | |
1559 | if(!(control & SER_RTS)) | |
1560 | strcat(stat_buf, "|RTS"); | |
1561 | if(!(status & SER_CTS)) | |
1562 | strcat(stat_buf, "|CTS"); | |
1563 | if(!(control & SER_DTR)) | |
1564 | strcat(stat_buf, "|DTR"); | |
1565 | if(!(status & SER_DSR)) | |
1566 | strcat(stat_buf, "|DSR"); | |
1567 | if(!(status & SER_DCD)) | |
1568 | strcat(stat_buf, "|CD"); | |
1569 | ||
916b7656 JS |
1570 | if (state->quot) |
1571 | seq_printf(m, " baud:%d", state->baud_base / state->quot); | |
1da177e4 | 1572 | |
d594027d | 1573 | seq_printf(m, " tx:%d rx:%d", state->icount.tx, state->icount.rx); |
1da177e4 LT |
1574 | |
1575 | if (state->icount.frame) | |
d594027d | 1576 | seq_printf(m, " fe:%d", state->icount.frame); |
1da177e4 LT |
1577 | |
1578 | if (state->icount.parity) | |
d594027d | 1579 | seq_printf(m, " pe:%d", state->icount.parity); |
1da177e4 LT |
1580 | |
1581 | if (state->icount.brk) | |
d594027d | 1582 | seq_printf(m, " brk:%d", state->icount.brk); |
1da177e4 LT |
1583 | |
1584 | if (state->icount.overrun) | |
d594027d | 1585 | seq_printf(m, " oe:%d", state->icount.overrun); |
1da177e4 LT |
1586 | |
1587 | /* | |
1588 | * Last thing is the RS-232 status lines | |
1589 | */ | |
d594027d | 1590 | seq_printf(m, " %s\n", stat_buf+1); |
1da177e4 LT |
1591 | } |
1592 | ||
d594027d | 1593 | static int rs_proc_show(struct seq_file *m, void *v) |
1da177e4 | 1594 | { |
d594027d | 1595 | seq_printf(m, "serinfo:1.0 driver:%s\n", serial_version); |
ff169e5c | 1596 | line_info(m, 0, &rs_table[0]); |
d594027d | 1597 | return 0; |
1da177e4 LT |
1598 | } |
1599 | ||
d594027d AD |
1600 | static int rs_proc_open(struct inode *inode, struct file *file) |
1601 | { | |
1602 | return single_open(file, rs_proc_show, NULL); | |
1603 | } | |
1604 | ||
1605 | static const struct file_operations rs_proc_fops = { | |
1606 | .owner = THIS_MODULE, | |
1607 | .open = rs_proc_open, | |
1608 | .read = seq_read, | |
1609 | .llseek = seq_lseek, | |
1610 | .release = single_release, | |
1611 | }; | |
1612 | ||
1da177e4 LT |
1613 | /* |
1614 | * --------------------------------------------------------------------- | |
1615 | * rs_init() and friends | |
1616 | * | |
1617 | * rs_init() is called at boot-time to initialize the serial driver. | |
1618 | * --------------------------------------------------------------------- | |
1619 | */ | |
1620 | ||
1621 | /* | |
1622 | * This routine prints out the appropriate serial driver version | |
1623 | * number, and identifies which options were configured into this | |
1624 | * driver. | |
1625 | */ | |
41c28ff1 | 1626 | static void show_serial_version(void) |
1da177e4 LT |
1627 | { |
1628 | printk(KERN_INFO "%s version %s\n", serial_name, serial_version); | |
1629 | } | |
1630 | ||
1631 | ||
b68e31d0 | 1632 | static const struct tty_operations serial_ops = { |
1da177e4 LT |
1633 | .open = rs_open, |
1634 | .close = rs_close, | |
1635 | .write = rs_write, | |
1636 | .put_char = rs_put_char, | |
1637 | .flush_chars = rs_flush_chars, | |
1638 | .write_room = rs_write_room, | |
1639 | .chars_in_buffer = rs_chars_in_buffer, | |
1640 | .flush_buffer = rs_flush_buffer, | |
1641 | .ioctl = rs_ioctl, | |
1642 | .throttle = rs_throttle, | |
1643 | .unthrottle = rs_unthrottle, | |
1644 | .set_termios = rs_set_termios, | |
1645 | .stop = rs_stop, | |
1646 | .start = rs_start, | |
1647 | .hangup = rs_hangup, | |
1648 | .break_ctl = rs_break, | |
1649 | .send_xchar = rs_send_xchar, | |
1650 | .wait_until_sent = rs_wait_until_sent, | |
1da177e4 LT |
1651 | .tiocmget = rs_tiocmget, |
1652 | .tiocmset = rs_tiocmset, | |
0587102c | 1653 | .get_icount = rs_get_icount, |
d594027d | 1654 | .proc_fops = &rs_proc_fops, |
1da177e4 LT |
1655 | }; |
1656 | ||
f1166604 JS |
1657 | static int amiga_carrier_raised(struct tty_port *port) |
1658 | { | |
1659 | return !(ciab.pra & SER_DCD); | |
1660 | } | |
1661 | ||
1662 | static void amiga_dtr_rts(struct tty_port *port, int raise) | |
1663 | { | |
1664 | struct serial_state *info = container_of(port, struct serial_state, | |
1665 | tport); | |
1666 | unsigned long flags; | |
1667 | ||
1668 | if (raise) | |
1669 | info->MCR |= SER_DTR|SER_RTS; | |
1670 | else | |
1671 | info->MCR &= ~(SER_DTR|SER_RTS); | |
1672 | ||
1673 | local_irq_save(flags); | |
1674 | rtsdtr_ctrl(info->MCR); | |
1675 | local_irq_restore(flags); | |
1676 | } | |
1677 | ||
1678 | static const struct tty_port_operations amiga_port_ops = { | |
1679 | .carrier_raised = amiga_carrier_raised, | |
1680 | .dtr_rts = amiga_dtr_rts, | |
1681 | }; | |
1682 | ||
1da177e4 LT |
1683 | /* |
1684 | * The serial driver boot-time initialization code! | |
1685 | */ | |
826e8c8c | 1686 | static int __init amiga_serial_probe(struct platform_device *pdev) |
1da177e4 LT |
1687 | { |
1688 | unsigned long flags; | |
1689 | struct serial_state * state; | |
5edc304f | 1690 | int error; |
1da177e4 | 1691 | |
410235fd | 1692 | serial_driver = alloc_tty_driver(NR_PORTS); |
1da177e4 LT |
1693 | if (!serial_driver) |
1694 | return -ENOMEM; | |
1695 | ||
1da177e4 LT |
1696 | show_serial_version(); |
1697 | ||
1698 | /* Initialize the tty_driver structure */ | |
1699 | ||
1da177e4 LT |
1700 | serial_driver->driver_name = "amiserial"; |
1701 | serial_driver->name = "ttyS"; | |
1702 | serial_driver->major = TTY_MAJOR; | |
1703 | serial_driver->minor_start = 64; | |
1704 | serial_driver->type = TTY_DRIVER_TYPE_SERIAL; | |
1705 | serial_driver->subtype = SERIAL_TYPE_NORMAL; | |
1706 | serial_driver->init_termios = tty_std_termios; | |
1707 | serial_driver->init_termios.c_cflag = | |
1708 | B9600 | CS8 | CREAD | HUPCL | CLOCAL; | |
1709 | serial_driver->flags = TTY_DRIVER_REAL_RAW; | |
1710 | tty_set_operations(serial_driver, &serial_ops); | |
1711 | ||
5edc304f GU |
1712 | error = tty_register_driver(serial_driver); |
1713 | if (error) | |
826e8c8c | 1714 | goto fail_put_tty_driver; |
1da177e4 LT |
1715 | |
1716 | state = rs_table; | |
1da177e4 | 1717 | state->port = (int)&custom.serdatr; /* Just to give it a value */ |
1da177e4 | 1718 | state->custom_divisor = 0; |
1da177e4 LT |
1719 | state->icount.cts = state->icount.dsr = |
1720 | state->icount.rng = state->icount.dcd = 0; | |
1721 | state->icount.rx = state->icount.tx = 0; | |
1722 | state->icount.frame = state->icount.parity = 0; | |
1723 | state->icount.overrun = state->icount.brk = 0; | |
87758791 | 1724 | tty_port_init(&state->tport); |
f1166604 | 1725 | state->tport.ops = &amiga_port_ops; |
1da177e4 | 1726 | |
ff169e5c | 1727 | printk(KERN_INFO "ttyS0 is the amiga builtin serial port\n"); |
1da177e4 LT |
1728 | |
1729 | /* Hardware set up */ | |
1730 | ||
1731 | state->baud_base = amiga_colorclock; | |
1732 | state->xmit_fifo_size = 1; | |
1733 | ||
1da177e4 | 1734 | /* set ISRs, and then disable the rx interrupts */ |
5edc304f GU |
1735 | error = request_irq(IRQ_AMIGA_TBE, ser_tx_int, 0, "serial TX", state); |
1736 | if (error) | |
1737 | goto fail_unregister; | |
1738 | ||
9cfb5c05 | 1739 | error = request_irq(IRQ_AMIGA_RBF, ser_rx_int, 0, |
5edc304f GU |
1740 | "serial RX", state); |
1741 | if (error) | |
1742 | goto fail_free_irq; | |
1da177e4 | 1743 | |
c70c036f JL |
1744 | local_irq_save(flags); |
1745 | ||
1da177e4 LT |
1746 | /* turn off Rx and Tx interrupts */ |
1747 | custom.intena = IF_RBF | IF_TBE; | |
1748 | mb(); | |
1749 | ||
1750 | /* clear any pending interrupt */ | |
1751 | custom.intreq = IF_RBF | IF_TBE; | |
1752 | mb(); | |
1753 | ||
1754 | local_irq_restore(flags); | |
1755 | ||
1756 | /* | |
1757 | * set the appropriate directions for the modem control flags, | |
1758 | * and clear RTS and DTR | |
1759 | */ | |
1760 | ciab.ddra |= (SER_DTR | SER_RTS); /* outputs */ | |
1761 | ciab.ddra &= ~(SER_DCD | SER_CTS | SER_DSR); /* inputs */ | |
1762 | ||
826e8c8c GU |
1763 | platform_set_drvdata(pdev, state); |
1764 | ||
1da177e4 | 1765 | return 0; |
5edc304f GU |
1766 | |
1767 | fail_free_irq: | |
1768 | free_irq(IRQ_AMIGA_TBE, state); | |
1769 | fail_unregister: | |
1770 | tty_unregister_driver(serial_driver); | |
5edc304f GU |
1771 | fail_put_tty_driver: |
1772 | put_tty_driver(serial_driver); | |
1773 | return error; | |
1da177e4 LT |
1774 | } |
1775 | ||
826e8c8c | 1776 | static int __exit amiga_serial_remove(struct platform_device *pdev) |
1da177e4 LT |
1777 | { |
1778 | int error; | |
826e8c8c | 1779 | struct serial_state *state = platform_get_drvdata(pdev); |
1da177e4 LT |
1780 | |
1781 | /* printk("Unloading %s: version %s\n", serial_name, serial_version); */ | |
1da177e4 LT |
1782 | if ((error = tty_unregister_driver(serial_driver))) |
1783 | printk("SERIAL: failed to unregister serial driver (%d)\n", | |
1784 | error); | |
1785 | put_tty_driver(serial_driver); | |
1786 | ||
916b7656 JS |
1787 | free_irq(IRQ_AMIGA_TBE, state); |
1788 | free_irq(IRQ_AMIGA_RBF, state); | |
5edc304f | 1789 | |
826e8c8c GU |
1790 | platform_set_drvdata(pdev, NULL); |
1791 | ||
1792 | return error; | |
1793 | } | |
1794 | ||
1795 | static struct platform_driver amiga_serial_driver = { | |
1796 | .remove = __exit_p(amiga_serial_remove), | |
1797 | .driver = { | |
1798 | .name = "amiga-serial", | |
1799 | .owner = THIS_MODULE, | |
1800 | }, | |
1801 | }; | |
1802 | ||
1803 | static int __init amiga_serial_init(void) | |
1804 | { | |
1805 | return platform_driver_probe(&amiga_serial_driver, amiga_serial_probe); | |
1806 | } | |
1807 | ||
1808 | module_init(amiga_serial_init); | |
1809 | ||
1810 | static void __exit amiga_serial_exit(void) | |
1811 | { | |
1812 | platform_driver_unregister(&amiga_serial_driver); | |
1da177e4 LT |
1813 | } |
1814 | ||
826e8c8c | 1815 | module_exit(amiga_serial_exit); |
1da177e4 LT |
1816 | |
1817 | ||
d1a35e4d GU |
1818 | #if defined(CONFIG_SERIAL_CONSOLE) && !defined(MODULE) |
1819 | ||
1da177e4 LT |
1820 | /* |
1821 | * ------------------------------------------------------------ | |
1822 | * Serial console driver | |
1823 | * ------------------------------------------------------------ | |
1824 | */ | |
1da177e4 LT |
1825 | |
1826 | static void amiga_serial_putc(char c) | |
1827 | { | |
1828 | custom.serdat = (unsigned char)c | 0x100; | |
1829 | while (!(custom.serdatr & 0x2000)) | |
1830 | barrier(); | |
1831 | } | |
1832 | ||
1833 | /* | |
1834 | * Print a string to the serial port trying not to disturb | |
1835 | * any possible real use of the port... | |
1836 | * | |
1837 | * The console must be locked when we get here. | |
1838 | */ | |
1839 | static void serial_console_write(struct console *co, const char *s, | |
1840 | unsigned count) | |
1841 | { | |
1842 | unsigned short intena = custom.intenar; | |
1843 | ||
1844 | custom.intena = IF_TBE; | |
1845 | ||
1846 | while (count--) { | |
1847 | if (*s == '\n') | |
1848 | amiga_serial_putc('\r'); | |
1849 | amiga_serial_putc(*s++); | |
1850 | } | |
1851 | ||
1852 | custom.intena = IF_SETCLR | (intena & IF_TBE); | |
1853 | } | |
1854 | ||
1855 | static struct tty_driver *serial_console_device(struct console *c, int *index) | |
1856 | { | |
1857 | *index = 0; | |
1858 | return serial_driver; | |
1859 | } | |
1860 | ||
1861 | static struct console sercons = { | |
1862 | .name = "ttyS", | |
1863 | .write = serial_console_write, | |
1864 | .device = serial_console_device, | |
1865 | .flags = CON_PRINTBUFFER, | |
1866 | .index = -1, | |
1867 | }; | |
1868 | ||
1869 | /* | |
1870 | * Register console. | |
1871 | */ | |
1872 | static int __init amiserial_console_init(void) | |
1873 | { | |
1874 | register_console(&sercons); | |
1875 | return 0; | |
1876 | } | |
1877 | console_initcall(amiserial_console_init); | |
d1a35e4d GU |
1878 | |
1879 | #endif /* CONFIG_SERIAL_CONSOLE && !MODULE */ | |
1da177e4 LT |
1880 | |
1881 | MODULE_LICENSE("GPL"); | |
826e8c8c | 1882 | MODULE_ALIAS("platform:amiga-serial"); |