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Commit | Line | Data |
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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 | ||
1da177e4 LT |
88 | |
89 | #include <asm/irq.h> | |
90 | ||
91 | #include <asm/amigahw.h> | |
92 | #include <asm/amigaints.h> | |
93 | ||
6fe18d26 JS |
94 | struct serial_state { |
95 | struct tty_port tport; | |
96 | struct circ_buf xmit; | |
97 | struct async_icount icount; | |
98 | ||
99 | unsigned long port; | |
100 | int baud_base; | |
101 | int xmit_fifo_size; | |
102 | int custom_divisor; | |
103 | int read_status_mask; | |
104 | int ignore_status_mask; | |
105 | int timeout; | |
106 | int quot; | |
107 | int IER; /* Interrupt Enable Register */ | |
108 | int MCR; /* Modem control register */ | |
109 | int x_char; /* xon/xoff character */ | |
110 | }; | |
111 | ||
b4290a23 | 112 | #define custom amiga_custom |
1da177e4 LT |
113 | static char *serial_name = "Amiga-builtin serial driver"; |
114 | ||
115 | static struct tty_driver *serial_driver; | |
116 | ||
117 | /* number of characters left in xmit buffer before we ask for more */ | |
118 | #define WAKEUP_CHARS 256 | |
119 | ||
1da177e4 LT |
120 | static unsigned char current_ctl_bits; |
121 | ||
588993dd JS |
122 | static void change_speed(struct tty_struct *tty, struct serial_state *info, |
123 | struct ktermios *old); | |
1da177e4 LT |
124 | static void rs_wait_until_sent(struct tty_struct *tty, int timeout); |
125 | ||
126 | ||
127 | static struct serial_state rs_table[1]; | |
128 | ||
fe971071 | 129 | #define NR_PORTS ARRAY_SIZE(rs_table) |
1da177e4 | 130 | |
1da177e4 LT |
131 | #include <asm/uaccess.h> |
132 | ||
133 | #define serial_isroot() (capable(CAP_SYS_ADMIN)) | |
134 | ||
135 | ||
916b7656 | 136 | static inline int serial_paranoia_check(struct serial_state *info, |
1da177e4 LT |
137 | char *name, const char *routine) |
138 | { | |
139 | #ifdef SERIAL_PARANOIA_CHECK | |
140 | static const char *badmagic = | |
141 | "Warning: bad magic number for serial struct (%s) in %s\n"; | |
142 | static const char *badinfo = | |
143 | "Warning: null async_struct for (%s) in %s\n"; | |
144 | ||
145 | if (!info) { | |
146 | printk(badinfo, name, routine); | |
147 | return 1; | |
148 | } | |
149 | if (info->magic != SERIAL_MAGIC) { | |
150 | printk(badmagic, name, routine); | |
151 | return 1; | |
152 | } | |
153 | #endif | |
154 | return 0; | |
155 | } | |
156 | ||
157 | /* some serial hardware definitions */ | |
158 | #define SDR_OVRUN (1<<15) | |
159 | #define SDR_RBF (1<<14) | |
160 | #define SDR_TBE (1<<13) | |
161 | #define SDR_TSRE (1<<12) | |
162 | ||
163 | #define SERPER_PARENB (1<<15) | |
164 | ||
165 | #define AC_SETCLR (1<<15) | |
166 | #define AC_UARTBRK (1<<11) | |
167 | ||
168 | #define SER_DTR (1<<7) | |
169 | #define SER_RTS (1<<6) | |
170 | #define SER_DCD (1<<5) | |
171 | #define SER_CTS (1<<4) | |
172 | #define SER_DSR (1<<3) | |
173 | ||
174 | static __inline__ void rtsdtr_ctrl(int bits) | |
175 | { | |
176 | ciab.pra = ((bits & (SER_RTS | SER_DTR)) ^ (SER_RTS | SER_DTR)) | (ciab.pra & ~(SER_RTS | SER_DTR)); | |
177 | } | |
178 | ||
179 | /* | |
180 | * ------------------------------------------------------------ | |
181 | * rs_stop() and rs_start() | |
182 | * | |
183 | * This routines are called before setting or resetting tty->stopped. | |
184 | * They enable or disable transmitter interrupts, as necessary. | |
185 | * ------------------------------------------------------------ | |
186 | */ | |
187 | static void rs_stop(struct tty_struct *tty) | |
188 | { | |
916b7656 | 189 | struct serial_state *info = tty->driver_data; |
1da177e4 LT |
190 | unsigned long flags; |
191 | ||
192 | if (serial_paranoia_check(info, tty->name, "rs_stop")) | |
193 | return; | |
194 | ||
195 | local_irq_save(flags); | |
196 | if (info->IER & UART_IER_THRI) { | |
197 | info->IER &= ~UART_IER_THRI; | |
198 | /* disable Tx interrupt and remove any pending interrupts */ | |
199 | custom.intena = IF_TBE; | |
200 | mb(); | |
201 | custom.intreq = IF_TBE; | |
202 | mb(); | |
203 | } | |
204 | local_irq_restore(flags); | |
205 | } | |
206 | ||
207 | static void rs_start(struct tty_struct *tty) | |
208 | { | |
916b7656 | 209 | struct serial_state *info = tty->driver_data; |
1da177e4 LT |
210 | unsigned long flags; |
211 | ||
212 | if (serial_paranoia_check(info, tty->name, "rs_start")) | |
213 | return; | |
214 | ||
215 | local_irq_save(flags); | |
216 | if (info->xmit.head != info->xmit.tail | |
217 | && info->xmit.buf | |
218 | && !(info->IER & UART_IER_THRI)) { | |
219 | info->IER |= UART_IER_THRI; | |
220 | custom.intena = IF_SETCLR | IF_TBE; | |
221 | mb(); | |
222 | /* set a pending Tx Interrupt, transmitter should restart now */ | |
223 | custom.intreq = IF_SETCLR | IF_TBE; | |
224 | mb(); | |
225 | } | |
226 | local_irq_restore(flags); | |
227 | } | |
228 | ||
229 | /* | |
230 | * ---------------------------------------------------------------------- | |
231 | * | |
232 | * Here starts the interrupt handling routines. All of the following | |
233 | * subroutines are declared as inline and are folded into | |
234 | * rs_interrupt(). They were separated out for readability's sake. | |
235 | * | |
236 | * Note: rs_interrupt() is a "fast" interrupt, which means that it | |
237 | * runs with interrupts turned off. People who may want to modify | |
238 | * rs_interrupt() should try to keep the interrupt handler as fast as | |
239 | * possible. After you are done making modifications, it is not a bad | |
240 | * idea to do: | |
241 | * | |
242 | * gcc -S -DKERNEL -Wall -Wstrict-prototypes -O6 -fomit-frame-pointer serial.c | |
243 | * | |
244 | * and look at the resulting assemble code in serial.s. | |
245 | * | |
246 | * - Ted Ts'o (tytso@mit.edu), 7-Mar-93 | |
247 | * ----------------------------------------------------------------------- | |
248 | */ | |
249 | ||
916b7656 | 250 | static void receive_chars(struct serial_state *info) |
1da177e4 LT |
251 | { |
252 | int status; | |
253 | int serdatr; | |
87758791 | 254 | struct tty_struct *tty = info->tport.tty; |
33f0f88f | 255 | unsigned char ch, flag; |
1da177e4 | 256 | struct async_icount *icount; |
33f0f88f | 257 | int oe = 0; |
1da177e4 | 258 | |
916b7656 | 259 | icount = &info->icount; |
1da177e4 LT |
260 | |
261 | status = UART_LSR_DR; /* We obviously have a character! */ | |
262 | serdatr = custom.serdatr; | |
263 | mb(); | |
264 | custom.intreq = IF_RBF; | |
265 | mb(); | |
266 | ||
267 | if((serdatr & 0x1ff) == 0) | |
268 | status |= UART_LSR_BI; | |
269 | if(serdatr & SDR_OVRUN) | |
270 | status |= UART_LSR_OE; | |
271 | ||
272 | ch = serdatr & 0xff; | |
1da177e4 LT |
273 | icount->rx++; |
274 | ||
275 | #ifdef SERIAL_DEBUG_INTR | |
276 | printk("DR%02x:%02x...", ch, status); | |
277 | #endif | |
33f0f88f | 278 | flag = TTY_NORMAL; |
1da177e4 LT |
279 | |
280 | /* | |
281 | * We don't handle parity or frame errors - but I have left | |
282 | * the code in, since I'm not sure that the errors can't be | |
283 | * detected. | |
284 | */ | |
285 | ||
286 | if (status & (UART_LSR_BI | UART_LSR_PE | | |
287 | UART_LSR_FE | UART_LSR_OE)) { | |
288 | /* | |
289 | * For statistics only | |
290 | */ | |
291 | if (status & UART_LSR_BI) { | |
292 | status &= ~(UART_LSR_FE | UART_LSR_PE); | |
293 | icount->brk++; | |
294 | } else if (status & UART_LSR_PE) | |
295 | icount->parity++; | |
296 | else if (status & UART_LSR_FE) | |
297 | icount->frame++; | |
298 | if (status & UART_LSR_OE) | |
299 | icount->overrun++; | |
300 | ||
301 | /* | |
302 | * Now check to see if character should be | |
303 | * ignored, and mask off conditions which | |
304 | * should be ignored. | |
305 | */ | |
306 | if (status & info->ignore_status_mask) | |
33f0f88f | 307 | goto out; |
1da177e4 LT |
308 | |
309 | status &= info->read_status_mask; | |
310 | ||
311 | if (status & (UART_LSR_BI)) { | |
312 | #ifdef SERIAL_DEBUG_INTR | |
313 | printk("handling break...."); | |
314 | #endif | |
33f0f88f | 315 | flag = TTY_BREAK; |
01bd730d | 316 | if (info->tport.flags & ASYNC_SAK) |
1da177e4 LT |
317 | do_SAK(tty); |
318 | } else if (status & UART_LSR_PE) | |
33f0f88f | 319 | flag = TTY_PARITY; |
1da177e4 | 320 | else if (status & UART_LSR_FE) |
33f0f88f | 321 | flag = TTY_FRAME; |
1da177e4 LT |
322 | if (status & UART_LSR_OE) { |
323 | /* | |
324 | * Overrun is special, since it's | |
325 | * reported immediately, and doesn't | |
326 | * affect the current character | |
327 | */ | |
33f0f88f | 328 | oe = 1; |
1da177e4 LT |
329 | } |
330 | } | |
33f0f88f AC |
331 | tty_insert_flip_char(tty, ch, flag); |
332 | if (oe == 1) | |
333 | tty_insert_flip_char(tty, 0, TTY_OVERRUN); | |
1da177e4 | 334 | tty_flip_buffer_push(tty); |
33f0f88f AC |
335 | out: |
336 | return; | |
1da177e4 LT |
337 | } |
338 | ||
916b7656 | 339 | static void transmit_chars(struct serial_state *info) |
1da177e4 LT |
340 | { |
341 | custom.intreq = IF_TBE; | |
342 | mb(); | |
343 | if (info->x_char) { | |
344 | custom.serdat = info->x_char | 0x100; | |
345 | mb(); | |
916b7656 | 346 | info->icount.tx++; |
1da177e4 LT |
347 | info->x_char = 0; |
348 | return; | |
349 | } | |
350 | if (info->xmit.head == info->xmit.tail | |
87758791 JS |
351 | || info->tport.tty->stopped |
352 | || info->tport.tty->hw_stopped) { | |
1da177e4 LT |
353 | info->IER &= ~UART_IER_THRI; |
354 | custom.intena = IF_TBE; | |
355 | mb(); | |
356 | return; | |
357 | } | |
358 | ||
359 | custom.serdat = info->xmit.buf[info->xmit.tail++] | 0x100; | |
360 | mb(); | |
361 | info->xmit.tail = info->xmit.tail & (SERIAL_XMIT_SIZE-1); | |
916b7656 | 362 | info->icount.tx++; |
1da177e4 LT |
363 | |
364 | if (CIRC_CNT(info->xmit.head, | |
365 | info->xmit.tail, | |
366 | SERIAL_XMIT_SIZE) < WAKEUP_CHARS) | |
87758791 | 367 | tty_wakeup(info->tport.tty); |
1da177e4 LT |
368 | |
369 | #ifdef SERIAL_DEBUG_INTR | |
370 | printk("THRE..."); | |
371 | #endif | |
372 | if (info->xmit.head == info->xmit.tail) { | |
373 | custom.intena = IF_TBE; | |
374 | mb(); | |
375 | info->IER &= ~UART_IER_THRI; | |
376 | } | |
377 | } | |
378 | ||
916b7656 | 379 | static void check_modem_status(struct serial_state *info) |
1da177e4 | 380 | { |
7188dc20 | 381 | struct tty_port *port = &info->tport; |
1da177e4 LT |
382 | unsigned char status = ciab.pra & (SER_DCD | SER_CTS | SER_DSR); |
383 | unsigned char dstatus; | |
384 | struct async_icount *icount; | |
385 | ||
386 | /* Determine bits that have changed */ | |
387 | dstatus = status ^ current_ctl_bits; | |
388 | current_ctl_bits = status; | |
389 | ||
390 | if (dstatus) { | |
916b7656 | 391 | icount = &info->icount; |
1da177e4 LT |
392 | /* update input line counters */ |
393 | if (dstatus & SER_DSR) | |
394 | icount->dsr++; | |
395 | if (dstatus & SER_DCD) { | |
396 | icount->dcd++; | |
397 | #ifdef CONFIG_HARD_PPS | |
7188dc20 | 398 | if ((port->flags & ASYNC_HARDPPS_CD) && |
1da177e4 LT |
399 | !(status & SER_DCD)) |
400 | hardpps(); | |
401 | #endif | |
402 | } | |
403 | if (dstatus & SER_CTS) | |
404 | icount->cts++; | |
7188dc20 | 405 | wake_up_interruptible(&port->delta_msr_wait); |
1da177e4 LT |
406 | } |
407 | ||
7188dc20 | 408 | if ((port->flags & ASYNC_CHECK_CD) && (dstatus & SER_DCD)) { |
1da177e4 LT |
409 | #if (defined(SERIAL_DEBUG_OPEN) || defined(SERIAL_DEBUG_INTR)) |
410 | printk("ttyS%d CD now %s...", info->line, | |
411 | (!(status & SER_DCD)) ? "on" : "off"); | |
412 | #endif | |
413 | if (!(status & SER_DCD)) | |
7188dc20 | 414 | wake_up_interruptible(&port->open_wait); |
1da177e4 LT |
415 | else { |
416 | #ifdef SERIAL_DEBUG_OPEN | |
417 | printk("doing serial hangup..."); | |
418 | #endif | |
7188dc20 JS |
419 | if (port->tty) |
420 | tty_hangup(port->tty); | |
1da177e4 LT |
421 | } |
422 | } | |
7188dc20 JS |
423 | if (port->flags & ASYNC_CTS_FLOW) { |
424 | if (port->tty->hw_stopped) { | |
1da177e4 LT |
425 | if (!(status & SER_CTS)) { |
426 | #if (defined(SERIAL_DEBUG_INTR) || defined(SERIAL_DEBUG_FLOW)) | |
427 | printk("CTS tx start..."); | |
428 | #endif | |
7188dc20 | 429 | port->tty->hw_stopped = 0; |
1da177e4 LT |
430 | info->IER |= UART_IER_THRI; |
431 | custom.intena = IF_SETCLR | IF_TBE; | |
432 | mb(); | |
433 | /* set a pending Tx Interrupt, transmitter should restart now */ | |
434 | custom.intreq = IF_SETCLR | IF_TBE; | |
435 | mb(); | |
7188dc20 | 436 | tty_wakeup(port->tty); |
1da177e4 LT |
437 | return; |
438 | } | |
439 | } else { | |
440 | if ((status & SER_CTS)) { | |
441 | #if (defined(SERIAL_DEBUG_INTR) || defined(SERIAL_DEBUG_FLOW)) | |
442 | printk("CTS tx stop..."); | |
443 | #endif | |
7188dc20 | 444 | port->tty->hw_stopped = 1; |
1da177e4 LT |
445 | info->IER &= ~UART_IER_THRI; |
446 | /* disable Tx interrupt and remove any pending interrupts */ | |
447 | custom.intena = IF_TBE; | |
448 | mb(); | |
449 | custom.intreq = IF_TBE; | |
450 | mb(); | |
451 | } | |
452 | } | |
453 | } | |
454 | } | |
455 | ||
7d12e780 | 456 | static irqreturn_t ser_vbl_int( int irq, void *data) |
1da177e4 LT |
457 | { |
458 | /* vbl is just a periodic interrupt we tie into to update modem status */ | |
916b7656 | 459 | struct serial_state *info = data; |
1da177e4 LT |
460 | /* |
461 | * TBD - is it better to unregister from this interrupt or to | |
462 | * ignore it if MSI is clear ? | |
463 | */ | |
464 | if(info->IER & UART_IER_MSI) | |
465 | check_modem_status(info); | |
466 | return IRQ_HANDLED; | |
467 | } | |
468 | ||
7d12e780 | 469 | static irqreturn_t ser_rx_int(int irq, void *dev_id) |
1da177e4 | 470 | { |
916b7656 | 471 | struct serial_state *info = dev_id; |
1da177e4 LT |
472 | |
473 | #ifdef SERIAL_DEBUG_INTR | |
474 | printk("ser_rx_int..."); | |
475 | #endif | |
476 | ||
87758791 | 477 | if (!info->tport.tty) |
1da177e4 LT |
478 | return IRQ_NONE; |
479 | ||
480 | receive_chars(info); | |
1da177e4 LT |
481 | #ifdef SERIAL_DEBUG_INTR |
482 | printk("end.\n"); | |
483 | #endif | |
484 | return IRQ_HANDLED; | |
485 | } | |
486 | ||
7d12e780 | 487 | static irqreturn_t ser_tx_int(int irq, void *dev_id) |
1da177e4 | 488 | { |
916b7656 | 489 | struct serial_state *info = dev_id; |
1da177e4 LT |
490 | |
491 | if (custom.serdatr & SDR_TBE) { | |
492 | #ifdef SERIAL_DEBUG_INTR | |
493 | printk("ser_tx_int..."); | |
494 | #endif | |
495 | ||
87758791 | 496 | if (!info->tport.tty) |
1da177e4 LT |
497 | return IRQ_NONE; |
498 | ||
499 | transmit_chars(info); | |
1da177e4 LT |
500 | #ifdef SERIAL_DEBUG_INTR |
501 | printk("end.\n"); | |
502 | #endif | |
503 | } | |
504 | return IRQ_HANDLED; | |
505 | } | |
506 | ||
507 | /* | |
508 | * ------------------------------------------------------------------- | |
509 | * Here ends the serial interrupt routines. | |
510 | * ------------------------------------------------------------------- | |
511 | */ | |
512 | ||
1da177e4 LT |
513 | /* |
514 | * --------------------------------------------------------------- | |
515 | * Low level utility subroutines for the serial driver: routines to | |
516 | * figure out the appropriate timeout for an interrupt chain, routines | |
517 | * to initialize and startup a serial port, and routines to shutdown a | |
518 | * serial port. Useful stuff like that. | |
519 | * --------------------------------------------------------------- | |
520 | */ | |
521 | ||
588993dd | 522 | static int startup(struct tty_struct *tty, struct serial_state *info) |
1da177e4 | 523 | { |
01bd730d | 524 | struct tty_port *port = &info->tport; |
1da177e4 LT |
525 | unsigned long flags; |
526 | int retval=0; | |
527 | unsigned long page; | |
528 | ||
529 | page = get_zeroed_page(GFP_KERNEL); | |
530 | if (!page) | |
531 | return -ENOMEM; | |
532 | ||
533 | local_irq_save(flags); | |
534 | ||
01bd730d | 535 | if (port->flags & ASYNC_INITIALIZED) { |
1da177e4 LT |
536 | free_page(page); |
537 | goto errout; | |
538 | } | |
539 | ||
540 | if (info->xmit.buf) | |
541 | free_page(page); | |
542 | else | |
543 | info->xmit.buf = (unsigned char *) page; | |
544 | ||
545 | #ifdef SERIAL_DEBUG_OPEN | |
546 | printk("starting up ttys%d ...", info->line); | |
547 | #endif | |
548 | ||
549 | /* Clear anything in the input buffer */ | |
550 | ||
551 | custom.intreq = IF_RBF; | |
552 | mb(); | |
553 | ||
554 | retval = request_irq(IRQ_AMIGA_VERTB, ser_vbl_int, 0, "serial status", info); | |
555 | if (retval) { | |
556 | if (serial_isroot()) { | |
588993dd | 557 | set_bit(TTY_IO_ERROR, &tty->flags); |
1da177e4 LT |
558 | retval = 0; |
559 | } | |
560 | goto errout; | |
561 | } | |
562 | ||
563 | /* enable both Rx and Tx interrupts */ | |
564 | custom.intena = IF_SETCLR | IF_RBF | IF_TBE; | |
565 | mb(); | |
566 | info->IER = UART_IER_MSI; | |
567 | ||
568 | /* remember current state of the DCD and CTS bits */ | |
569 | current_ctl_bits = ciab.pra & (SER_DCD | SER_CTS | SER_DSR); | |
570 | ||
1da177e4 | 571 | info->MCR = 0; |
588993dd | 572 | if (C_BAUD(tty)) |
1da177e4 LT |
573 | info->MCR = SER_DTR | SER_RTS; |
574 | rtsdtr_ctrl(info->MCR); | |
575 | ||
588993dd | 576 | clear_bit(TTY_IO_ERROR, &tty->flags); |
1da177e4 LT |
577 | info->xmit.head = info->xmit.tail = 0; |
578 | ||
579 | /* | |
580 | * Set up the tty->alt_speed kludge | |
581 | */ | |
01bd730d | 582 | if ((port->flags & ASYNC_SPD_MASK) == ASYNC_SPD_HI) |
588993dd | 583 | tty->alt_speed = 57600; |
01bd730d | 584 | if ((port->flags & ASYNC_SPD_MASK) == ASYNC_SPD_VHI) |
588993dd | 585 | tty->alt_speed = 115200; |
01bd730d | 586 | if ((port->flags & ASYNC_SPD_MASK) == ASYNC_SPD_SHI) |
588993dd | 587 | tty->alt_speed = 230400; |
01bd730d | 588 | if ((port->flags & ASYNC_SPD_MASK) == ASYNC_SPD_WARP) |
588993dd | 589 | tty->alt_speed = 460800; |
1da177e4 LT |
590 | |
591 | /* | |
592 | * and set the speed of the serial port | |
593 | */ | |
588993dd | 594 | change_speed(tty, info, NULL); |
1da177e4 | 595 | |
01bd730d | 596 | port->flags |= ASYNC_INITIALIZED; |
1da177e4 LT |
597 | local_irq_restore(flags); |
598 | return 0; | |
599 | ||
600 | errout: | |
601 | local_irq_restore(flags); | |
602 | return retval; | |
603 | } | |
604 | ||
605 | /* | |
606 | * This routine will shutdown a serial port; interrupts are disabled, and | |
607 | * DTR is dropped if the hangup on close termio flag is on. | |
608 | */ | |
588993dd | 609 | static void shutdown(struct tty_struct *tty, struct serial_state *info) |
1da177e4 LT |
610 | { |
611 | unsigned long flags; | |
612 | struct serial_state *state; | |
613 | ||
01bd730d | 614 | if (!(info->tport.flags & ASYNC_INITIALIZED)) |
1da177e4 LT |
615 | return; |
616 | ||
916b7656 | 617 | state = info; |
1da177e4 LT |
618 | |
619 | #ifdef SERIAL_DEBUG_OPEN | |
620 | printk("Shutting down serial port %d ....\n", info->line); | |
621 | #endif | |
622 | ||
623 | local_irq_save(flags); /* Disable interrupts */ | |
624 | ||
625 | /* | |
626 | * clear delta_msr_wait queue to avoid mem leaks: we may free the irq | |
627 | * here so the queue might never be waken up | |
628 | */ | |
87758791 | 629 | wake_up_interruptible(&info->tport.delta_msr_wait); |
1da177e4 | 630 | |
1da177e4 LT |
631 | /* |
632 | * Free the IRQ, if necessary | |
633 | */ | |
634 | free_irq(IRQ_AMIGA_VERTB, info); | |
635 | ||
636 | if (info->xmit.buf) { | |
637 | free_page((unsigned long) info->xmit.buf); | |
638 | info->xmit.buf = NULL; | |
639 | } | |
640 | ||
641 | info->IER = 0; | |
642 | custom.intena = IF_RBF | IF_TBE; | |
643 | mb(); | |
644 | ||
645 | /* disable break condition */ | |
646 | custom.adkcon = AC_UARTBRK; | |
647 | mb(); | |
648 | ||
adc8d746 | 649 | if (tty->termios.c_cflag & HUPCL) |
1da177e4 LT |
650 | info->MCR &= ~(SER_DTR|SER_RTS); |
651 | rtsdtr_ctrl(info->MCR); | |
652 | ||
588993dd | 653 | set_bit(TTY_IO_ERROR, &tty->flags); |
1da177e4 | 654 | |
01bd730d | 655 | info->tport.flags &= ~ASYNC_INITIALIZED; |
1da177e4 LT |
656 | local_irq_restore(flags); |
657 | } | |
658 | ||
659 | ||
660 | /* | |
661 | * This routine is called to set the UART divisor registers to match | |
662 | * the specified baud rate for a serial port. | |
663 | */ | |
588993dd | 664 | static void change_speed(struct tty_struct *tty, struct serial_state *info, |
606d099c | 665 | struct ktermios *old_termios) |
1da177e4 | 666 | { |
01bd730d | 667 | struct tty_port *port = &info->tport; |
1da177e4 LT |
668 | int quot = 0, baud_base, baud; |
669 | unsigned cflag, cval = 0; | |
670 | int bits; | |
671 | unsigned long flags; | |
672 | ||
adc8d746 | 673 | cflag = tty->termios.c_cflag; |
1da177e4 LT |
674 | |
675 | /* Byte size is always 8 bits plus parity bit if requested */ | |
676 | ||
677 | cval = 3; bits = 10; | |
678 | if (cflag & CSTOPB) { | |
679 | cval |= 0x04; | |
680 | bits++; | |
681 | } | |
682 | if (cflag & PARENB) { | |
683 | cval |= UART_LCR_PARITY; | |
684 | bits++; | |
685 | } | |
686 | if (!(cflag & PARODD)) | |
687 | cval |= UART_LCR_EPAR; | |
688 | #ifdef CMSPAR | |
689 | if (cflag & CMSPAR) | |
690 | cval |= UART_LCR_SPAR; | |
691 | #endif | |
692 | ||
693 | /* Determine divisor based on baud rate */ | |
588993dd | 694 | baud = tty_get_baud_rate(tty); |
1da177e4 LT |
695 | if (!baud) |
696 | baud = 9600; /* B0 transition handled in rs_set_termios */ | |
916b7656 | 697 | baud_base = info->baud_base; |
01bd730d | 698 | if (baud == 38400 && (port->flags & ASYNC_SPD_MASK) == ASYNC_SPD_CUST) |
916b7656 | 699 | quot = info->custom_divisor; |
1da177e4 LT |
700 | else { |
701 | if (baud == 134) | |
702 | /* Special case since 134 is really 134.5 */ | |
703 | quot = (2*baud_base / 269); | |
704 | else if (baud) | |
705 | quot = baud_base / baud; | |
706 | } | |
707 | /* If the quotient is zero refuse the change */ | |
708 | if (!quot && old_termios) { | |
db0ef08e | 709 | /* FIXME: Will need updating for new tty in the end */ |
adc8d746 AC |
710 | tty->termios.c_cflag &= ~CBAUD; |
711 | tty->termios.c_cflag |= (old_termios->c_cflag & CBAUD); | |
588993dd | 712 | baud = tty_get_baud_rate(tty); |
1da177e4 LT |
713 | if (!baud) |
714 | baud = 9600; | |
715 | if (baud == 38400 && | |
01bd730d | 716 | (port->flags & ASYNC_SPD_MASK) == ASYNC_SPD_CUST) |
916b7656 | 717 | quot = info->custom_divisor; |
1da177e4 LT |
718 | else { |
719 | if (baud == 134) | |
720 | /* Special case since 134 is really 134.5 */ | |
721 | quot = (2*baud_base / 269); | |
722 | else if (baud) | |
723 | quot = baud_base / baud; | |
724 | } | |
725 | } | |
726 | /* As a last resort, if the quotient is zero, default to 9600 bps */ | |
727 | if (!quot) | |
728 | quot = baud_base / 9600; | |
729 | info->quot = quot; | |
916b7656 | 730 | info->timeout = ((info->xmit_fifo_size*HZ*bits*quot) / baud_base); |
1da177e4 LT |
731 | info->timeout += HZ/50; /* Add .02 seconds of slop */ |
732 | ||
733 | /* CTS flow control flag and modem status interrupts */ | |
734 | info->IER &= ~UART_IER_MSI; | |
01bd730d | 735 | if (port->flags & ASYNC_HARDPPS_CD) |
1da177e4 LT |
736 | info->IER |= UART_IER_MSI; |
737 | if (cflag & CRTSCTS) { | |
01bd730d | 738 | port->flags |= ASYNC_CTS_FLOW; |
1da177e4 LT |
739 | info->IER |= UART_IER_MSI; |
740 | } else | |
01bd730d | 741 | port->flags &= ~ASYNC_CTS_FLOW; |
1da177e4 | 742 | if (cflag & CLOCAL) |
01bd730d | 743 | port->flags &= ~ASYNC_CHECK_CD; |
1da177e4 | 744 | else { |
01bd730d | 745 | port->flags |= ASYNC_CHECK_CD; |
1da177e4 LT |
746 | info->IER |= UART_IER_MSI; |
747 | } | |
748 | /* TBD: | |
4b512d26 | 749 | * Does clearing IER_MSI imply that we should disable the VBL interrupt ? |
1da177e4 LT |
750 | */ |
751 | ||
752 | /* | |
753 | * Set up parity check flag | |
754 | */ | |
1da177e4 LT |
755 | |
756 | info->read_status_mask = UART_LSR_OE | UART_LSR_DR; | |
588993dd | 757 | if (I_INPCK(tty)) |
1da177e4 | 758 | info->read_status_mask |= UART_LSR_FE | UART_LSR_PE; |
588993dd | 759 | if (I_BRKINT(tty) || I_PARMRK(tty)) |
1da177e4 LT |
760 | info->read_status_mask |= UART_LSR_BI; |
761 | ||
762 | /* | |
763 | * Characters to ignore | |
764 | */ | |
765 | info->ignore_status_mask = 0; | |
588993dd | 766 | if (I_IGNPAR(tty)) |
1da177e4 | 767 | info->ignore_status_mask |= UART_LSR_PE | UART_LSR_FE; |
588993dd | 768 | if (I_IGNBRK(tty)) { |
1da177e4 LT |
769 | info->ignore_status_mask |= UART_LSR_BI; |
770 | /* | |
771 | * If we're ignore parity and break indicators, ignore | |
772 | * overruns too. (For real raw support). | |
773 | */ | |
588993dd | 774 | if (I_IGNPAR(tty)) |
1da177e4 LT |
775 | info->ignore_status_mask |= UART_LSR_OE; |
776 | } | |
777 | /* | |
778 | * !!! ignore all characters if CREAD is not set | |
779 | */ | |
780 | if ((cflag & CREAD) == 0) | |
781 | info->ignore_status_mask |= UART_LSR_DR; | |
782 | local_irq_save(flags); | |
783 | ||
784 | { | |
785 | short serper; | |
786 | ||
787 | /* Set up the baud rate */ | |
788 | serper = quot - 1; | |
789 | ||
790 | /* Enable or disable parity bit */ | |
791 | ||
792 | if(cval & UART_LCR_PARITY) | |
793 | serper |= (SERPER_PARENB); | |
794 | ||
795 | custom.serper = serper; | |
796 | mb(); | |
797 | } | |
798 | ||
1da177e4 LT |
799 | local_irq_restore(flags); |
800 | } | |
801 | ||
257afa3c | 802 | static int rs_put_char(struct tty_struct *tty, unsigned char ch) |
1da177e4 | 803 | { |
916b7656 | 804 | struct serial_state *info; |
1da177e4 LT |
805 | unsigned long flags; |
806 | ||
d9ad7ef1 TJRMI |
807 | info = tty->driver_data; |
808 | ||
1da177e4 | 809 | if (serial_paranoia_check(info, tty->name, "rs_put_char")) |
257afa3c | 810 | return 0; |
1da177e4 | 811 | |
d9ad7ef1 | 812 | if (!info->xmit.buf) |
257afa3c | 813 | return 0; |
1da177e4 LT |
814 | |
815 | local_irq_save(flags); | |
816 | if (CIRC_SPACE(info->xmit.head, | |
817 | info->xmit.tail, | |
818 | SERIAL_XMIT_SIZE) == 0) { | |
819 | local_irq_restore(flags); | |
257afa3c | 820 | return 0; |
1da177e4 LT |
821 | } |
822 | ||
823 | info->xmit.buf[info->xmit.head++] = ch; | |
824 | info->xmit.head &= SERIAL_XMIT_SIZE-1; | |
825 | local_irq_restore(flags); | |
257afa3c | 826 | return 1; |
1da177e4 LT |
827 | } |
828 | ||
829 | static void rs_flush_chars(struct tty_struct *tty) | |
830 | { | |
916b7656 | 831 | struct serial_state *info = tty->driver_data; |
1da177e4 LT |
832 | unsigned long flags; |
833 | ||
834 | if (serial_paranoia_check(info, tty->name, "rs_flush_chars")) | |
835 | return; | |
836 | ||
837 | if (info->xmit.head == info->xmit.tail | |
838 | || tty->stopped | |
839 | || tty->hw_stopped | |
840 | || !info->xmit.buf) | |
841 | return; | |
842 | ||
843 | local_irq_save(flags); | |
844 | info->IER |= UART_IER_THRI; | |
845 | custom.intena = IF_SETCLR | IF_TBE; | |
846 | mb(); | |
847 | /* set a pending Tx Interrupt, transmitter should restart now */ | |
848 | custom.intreq = IF_SETCLR | IF_TBE; | |
849 | mb(); | |
850 | local_irq_restore(flags); | |
851 | } | |
852 | ||
853 | static int rs_write(struct tty_struct * tty, const unsigned char *buf, int count) | |
854 | { | |
855 | int c, ret = 0; | |
916b7656 | 856 | struct serial_state *info = tty->driver_data; |
1da177e4 LT |
857 | unsigned long flags; |
858 | ||
859 | if (serial_paranoia_check(info, tty->name, "rs_write")) | |
860 | return 0; | |
861 | ||
b3218a79 | 862 | if (!info->xmit.buf) |
1da177e4 LT |
863 | return 0; |
864 | ||
3abf3bed | 865 | local_irq_save(flags); |
1da177e4 LT |
866 | while (1) { |
867 | c = CIRC_SPACE_TO_END(info->xmit.head, | |
868 | info->xmit.tail, | |
869 | SERIAL_XMIT_SIZE); | |
870 | if (count < c) | |
871 | c = count; | |
872 | if (c <= 0) { | |
873 | break; | |
874 | } | |
875 | memcpy(info->xmit.buf + info->xmit.head, buf, c); | |
876 | info->xmit.head = ((info->xmit.head + c) & | |
877 | (SERIAL_XMIT_SIZE-1)); | |
878 | buf += c; | |
879 | count -= c; | |
880 | ret += c; | |
881 | } | |
882 | local_irq_restore(flags); | |
883 | ||
884 | if (info->xmit.head != info->xmit.tail | |
885 | && !tty->stopped | |
886 | && !tty->hw_stopped | |
887 | && !(info->IER & UART_IER_THRI)) { | |
888 | info->IER |= UART_IER_THRI; | |
889 | local_irq_disable(); | |
890 | custom.intena = IF_SETCLR | IF_TBE; | |
891 | mb(); | |
892 | /* set a pending Tx Interrupt, transmitter should restart now */ | |
893 | custom.intreq = IF_SETCLR | IF_TBE; | |
894 | mb(); | |
895 | local_irq_restore(flags); | |
896 | } | |
897 | return ret; | |
898 | } | |
899 | ||
900 | static int rs_write_room(struct tty_struct *tty) | |
901 | { | |
916b7656 | 902 | struct serial_state *info = tty->driver_data; |
1da177e4 LT |
903 | |
904 | if (serial_paranoia_check(info, tty->name, "rs_write_room")) | |
905 | return 0; | |
906 | return CIRC_SPACE(info->xmit.head, info->xmit.tail, SERIAL_XMIT_SIZE); | |
907 | } | |
908 | ||
909 | static int rs_chars_in_buffer(struct tty_struct *tty) | |
910 | { | |
916b7656 | 911 | struct serial_state *info = tty->driver_data; |
1da177e4 LT |
912 | |
913 | if (serial_paranoia_check(info, tty->name, "rs_chars_in_buffer")) | |
914 | return 0; | |
915 | return CIRC_CNT(info->xmit.head, info->xmit.tail, SERIAL_XMIT_SIZE); | |
916 | } | |
917 | ||
918 | static void rs_flush_buffer(struct tty_struct *tty) | |
919 | { | |
916b7656 | 920 | struct serial_state *info = tty->driver_data; |
1da177e4 LT |
921 | unsigned long flags; |
922 | ||
923 | if (serial_paranoia_check(info, tty->name, "rs_flush_buffer")) | |
924 | return; | |
925 | local_irq_save(flags); | |
926 | info->xmit.head = info->xmit.tail = 0; | |
927 | local_irq_restore(flags); | |
1da177e4 LT |
928 | tty_wakeup(tty); |
929 | } | |
930 | ||
931 | /* | |
932 | * This function is used to send a high-priority XON/XOFF character to | |
933 | * the device | |
934 | */ | |
935 | static void rs_send_xchar(struct tty_struct *tty, char ch) | |
936 | { | |
916b7656 | 937 | struct serial_state *info = tty->driver_data; |
1da177e4 LT |
938 | unsigned long flags; |
939 | ||
940 | if (serial_paranoia_check(info, tty->name, "rs_send_char")) | |
941 | return; | |
942 | ||
943 | info->x_char = ch; | |
944 | if (ch) { | |
945 | /* Make sure transmit interrupts are on */ | |
946 | ||
947 | /* Check this ! */ | |
948 | local_irq_save(flags); | |
949 | if(!(custom.intenar & IF_TBE)) { | |
950 | custom.intena = IF_SETCLR | IF_TBE; | |
951 | mb(); | |
952 | /* set a pending Tx Interrupt, transmitter should restart now */ | |
953 | custom.intreq = IF_SETCLR | IF_TBE; | |
954 | mb(); | |
955 | } | |
956 | local_irq_restore(flags); | |
957 | ||
958 | info->IER |= UART_IER_THRI; | |
959 | } | |
960 | } | |
961 | ||
962 | /* | |
963 | * ------------------------------------------------------------ | |
964 | * rs_throttle() | |
965 | * | |
966 | * This routine is called by the upper-layer tty layer to signal that | |
967 | * incoming characters should be throttled. | |
968 | * ------------------------------------------------------------ | |
969 | */ | |
970 | static void rs_throttle(struct tty_struct * tty) | |
971 | { | |
916b7656 | 972 | struct serial_state *info = tty->driver_data; |
1da177e4 LT |
973 | unsigned long flags; |
974 | #ifdef SERIAL_DEBUG_THROTTLE | |
975 | char buf[64]; | |
976 | ||
977 | printk("throttle %s: %d....\n", tty_name(tty, buf), | |
978 | tty->ldisc.chars_in_buffer(tty)); | |
979 | #endif | |
980 | ||
981 | if (serial_paranoia_check(info, tty->name, "rs_throttle")) | |
982 | return; | |
983 | ||
984 | if (I_IXOFF(tty)) | |
985 | rs_send_xchar(tty, STOP_CHAR(tty)); | |
986 | ||
adc8d746 | 987 | if (tty->termios.c_cflag & CRTSCTS) |
1da177e4 LT |
988 | info->MCR &= ~SER_RTS; |
989 | ||
990 | local_irq_save(flags); | |
991 | rtsdtr_ctrl(info->MCR); | |
992 | local_irq_restore(flags); | |
993 | } | |
994 | ||
995 | static void rs_unthrottle(struct tty_struct * tty) | |
996 | { | |
916b7656 | 997 | struct serial_state *info = tty->driver_data; |
1da177e4 LT |
998 | unsigned long flags; |
999 | #ifdef SERIAL_DEBUG_THROTTLE | |
1000 | char buf[64]; | |
1001 | ||
1002 | printk("unthrottle %s: %d....\n", tty_name(tty, buf), | |
1003 | tty->ldisc.chars_in_buffer(tty)); | |
1004 | #endif | |
1005 | ||
1006 | if (serial_paranoia_check(info, tty->name, "rs_unthrottle")) | |
1007 | return; | |
1008 | ||
1009 | if (I_IXOFF(tty)) { | |
1010 | if (info->x_char) | |
1011 | info->x_char = 0; | |
1012 | else | |
1013 | rs_send_xchar(tty, START_CHAR(tty)); | |
1014 | } | |
adc8d746 | 1015 | if (tty->termios.c_cflag & CRTSCTS) |
1da177e4 LT |
1016 | info->MCR |= SER_RTS; |
1017 | local_irq_save(flags); | |
1018 | rtsdtr_ctrl(info->MCR); | |
1019 | local_irq_restore(flags); | |
1020 | } | |
1021 | ||
1022 | /* | |
1023 | * ------------------------------------------------------------ | |
1024 | * rs_ioctl() and friends | |
1025 | * ------------------------------------------------------------ | |
1026 | */ | |
1027 | ||
ff169e5c | 1028 | static int get_serial_info(struct tty_struct *tty, struct serial_state *state, |
ab14caec | 1029 | struct serial_struct __user * retinfo) |
1da177e4 LT |
1030 | { |
1031 | struct serial_struct tmp; | |
1da177e4 LT |
1032 | |
1033 | if (!retinfo) | |
1034 | return -EFAULT; | |
1035 | memset(&tmp, 0, sizeof(tmp)); | |
89c8d91e | 1036 | tty_lock(tty); |
ff169e5c | 1037 | tmp.line = tty->index; |
1da177e4 | 1038 | tmp.port = state->port; |
01bd730d | 1039 | tmp.flags = state->tport.flags; |
1da177e4 LT |
1040 | tmp.xmit_fifo_size = state->xmit_fifo_size; |
1041 | tmp.baud_base = state->baud_base; | |
799be6ff JS |
1042 | tmp.close_delay = state->tport.close_delay; |
1043 | tmp.closing_wait = state->tport.closing_wait; | |
1da177e4 | 1044 | tmp.custom_divisor = state->custom_divisor; |
89c8d91e | 1045 | tty_unlock(tty); |
1da177e4 LT |
1046 | if (copy_to_user(retinfo,&tmp,sizeof(*retinfo))) |
1047 | return -EFAULT; | |
1048 | return 0; | |
1049 | } | |
1050 | ||
588993dd | 1051 | static int set_serial_info(struct tty_struct *tty, struct serial_state *state, |
ab14caec | 1052 | struct serial_struct __user * new_info) |
1da177e4 | 1053 | { |
01bd730d | 1054 | struct tty_port *port = &state->tport; |
1da177e4 | 1055 | struct serial_struct new_serial; |
0f9b9684 | 1056 | bool change_spd; |
1da177e4 LT |
1057 | int retval = 0; |
1058 | ||
1059 | if (copy_from_user(&new_serial,new_info,sizeof(new_serial))) | |
1060 | return -EFAULT; | |
e18ce49b | 1061 | |
89c8d91e | 1062 | tty_lock(tty); |
01bd730d | 1063 | change_spd = ((new_serial.flags ^ port->flags) & ASYNC_SPD_MASK) || |
0f9b9684 | 1064 | new_serial.custom_divisor != state->custom_divisor; |
ff169e5c | 1065 | if (new_serial.irq || new_serial.port != state->port || |
0f9b9684 | 1066 | new_serial.xmit_fifo_size != state->xmit_fifo_size) { |
89c8d91e | 1067 | tty_unlock(tty); |
0f9b9684 | 1068 | return -EINVAL; |
e18ce49b | 1069 | } |
1da177e4 LT |
1070 | |
1071 | if (!serial_isroot()) { | |
1072 | if ((new_serial.baud_base != state->baud_base) || | |
01bd730d | 1073 | (new_serial.close_delay != port->close_delay) || |
1da177e4 LT |
1074 | (new_serial.xmit_fifo_size != state->xmit_fifo_size) || |
1075 | ((new_serial.flags & ~ASYNC_USR_MASK) != | |
d3a7b83f | 1076 | (port->flags & ~ASYNC_USR_MASK))) { |
89c8d91e | 1077 | tty_unlock(tty); |
1da177e4 | 1078 | return -EPERM; |
d3a7b83f | 1079 | } |
01bd730d | 1080 | port->flags = ((port->flags & ~ASYNC_USR_MASK) | |
1da177e4 | 1081 | (new_serial.flags & ASYNC_USR_MASK)); |
1da177e4 LT |
1082 | state->custom_divisor = new_serial.custom_divisor; |
1083 | goto check_and_exit; | |
1084 | } | |
1085 | ||
e18ce49b | 1086 | if (new_serial.baud_base < 9600) { |
89c8d91e | 1087 | tty_unlock(tty); |
1da177e4 | 1088 | return -EINVAL; |
e18ce49b | 1089 | } |
1da177e4 LT |
1090 | |
1091 | /* | |
1092 | * OK, past this point, all the error checking has been done. | |
1093 | * At this point, we start making changes..... | |
1094 | */ | |
1095 | ||
1096 | state->baud_base = new_serial.baud_base; | |
01bd730d | 1097 | port->flags = ((port->flags & ~ASYNC_FLAGS) | |
1da177e4 | 1098 | (new_serial.flags & ASYNC_FLAGS)); |
1da177e4 | 1099 | state->custom_divisor = new_serial.custom_divisor; |
01bd730d JS |
1100 | port->close_delay = new_serial.close_delay * HZ/100; |
1101 | port->closing_wait = new_serial.closing_wait * HZ/100; | |
1102 | tty->low_latency = (port->flags & ASYNC_LOW_LATENCY) ? 1 : 0; | |
1da177e4 LT |
1103 | |
1104 | check_and_exit: | |
01bd730d | 1105 | if (port->flags & ASYNC_INITIALIZED) { |
0f9b9684 | 1106 | if (change_spd) { |
01bd730d | 1107 | if ((port->flags & ASYNC_SPD_MASK) == ASYNC_SPD_HI) |
588993dd | 1108 | tty->alt_speed = 57600; |
01bd730d | 1109 | if ((port->flags & ASYNC_SPD_MASK) == ASYNC_SPD_VHI) |
588993dd | 1110 | tty->alt_speed = 115200; |
01bd730d | 1111 | if ((port->flags & ASYNC_SPD_MASK) == ASYNC_SPD_SHI) |
588993dd | 1112 | tty->alt_speed = 230400; |
01bd730d | 1113 | if ((port->flags & ASYNC_SPD_MASK) == ASYNC_SPD_WARP) |
588993dd JS |
1114 | tty->alt_speed = 460800; |
1115 | change_speed(tty, state, NULL); | |
1da177e4 LT |
1116 | } |
1117 | } else | |
588993dd | 1118 | retval = startup(tty, state); |
89c8d91e | 1119 | tty_unlock(tty); |
1da177e4 LT |
1120 | return retval; |
1121 | } | |
1122 | ||
1123 | ||
1124 | /* | |
1125 | * get_lsr_info - get line status register info | |
1126 | * | |
1127 | * Purpose: Let user call ioctl() to get info when the UART physically | |
1128 | * is emptied. On bus types like RS485, the transmitter must | |
1129 | * release the bus after transmitting. This must be done when | |
1130 | * the transmit shift register is empty, not be done when the | |
1131 | * transmit holding register is empty. This functionality | |
1132 | * allows an RS485 driver to be written in user space. | |
1133 | */ | |
916b7656 | 1134 | static int get_lsr_info(struct serial_state *info, unsigned int __user *value) |
1da177e4 LT |
1135 | { |
1136 | unsigned char status; | |
1137 | unsigned int result; | |
1138 | unsigned long flags; | |
1139 | ||
1140 | local_irq_save(flags); | |
1141 | status = custom.serdatr; | |
1142 | mb(); | |
1143 | local_irq_restore(flags); | |
1144 | result = ((status & SDR_TSRE) ? TIOCSER_TEMT : 0); | |
1145 | if (copy_to_user(value, &result, sizeof(int))) | |
1146 | return -EFAULT; | |
1147 | return 0; | |
1148 | } | |
1149 | ||
1150 | ||
60b33c13 | 1151 | static int rs_tiocmget(struct tty_struct *tty) |
1da177e4 | 1152 | { |
916b7656 | 1153 | struct serial_state *info = tty->driver_data; |
1da177e4 LT |
1154 | unsigned char control, status; |
1155 | unsigned long flags; | |
1156 | ||
1157 | if (serial_paranoia_check(info, tty->name, "rs_ioctl")) | |
1158 | return -ENODEV; | |
1159 | if (tty->flags & (1 << TTY_IO_ERROR)) | |
1160 | return -EIO; | |
1161 | ||
1162 | control = info->MCR; | |
1163 | local_irq_save(flags); | |
1164 | status = ciab.pra; | |
1165 | local_irq_restore(flags); | |
1166 | return ((control & SER_RTS) ? TIOCM_RTS : 0) | |
1167 | | ((control & SER_DTR) ? TIOCM_DTR : 0) | |
1168 | | (!(status & SER_DCD) ? TIOCM_CAR : 0) | |
1169 | | (!(status & SER_DSR) ? TIOCM_DSR : 0) | |
1170 | | (!(status & SER_CTS) ? TIOCM_CTS : 0); | |
1171 | } | |
1172 | ||
20b9d177 AC |
1173 | static int rs_tiocmset(struct tty_struct *tty, unsigned int set, |
1174 | unsigned int clear) | |
1da177e4 | 1175 | { |
916b7656 | 1176 | struct serial_state *info = tty->driver_data; |
1da177e4 LT |
1177 | unsigned long flags; |
1178 | ||
1179 | if (serial_paranoia_check(info, tty->name, "rs_ioctl")) | |
1180 | return -ENODEV; | |
1181 | if (tty->flags & (1 << TTY_IO_ERROR)) | |
1182 | return -EIO; | |
1183 | ||
1184 | local_irq_save(flags); | |
1185 | if (set & TIOCM_RTS) | |
1186 | info->MCR |= SER_RTS; | |
1187 | if (set & TIOCM_DTR) | |
1188 | info->MCR |= SER_DTR; | |
1189 | if (clear & TIOCM_RTS) | |
1190 | info->MCR &= ~SER_RTS; | |
1191 | if (clear & TIOCM_DTR) | |
1192 | info->MCR &= ~SER_DTR; | |
1193 | rtsdtr_ctrl(info->MCR); | |
1194 | local_irq_restore(flags); | |
1195 | return 0; | |
1196 | } | |
1197 | ||
1198 | /* | |
1199 | * rs_break() --- routine which turns the break handling on or off | |
1200 | */ | |
9e98966c | 1201 | static int rs_break(struct tty_struct *tty, int break_state) |
1da177e4 | 1202 | { |
916b7656 | 1203 | struct serial_state *info = tty->driver_data; |
1da177e4 LT |
1204 | unsigned long flags; |
1205 | ||
1206 | if (serial_paranoia_check(info, tty->name, "rs_break")) | |
970a8a51 | 1207 | return -EINVAL; |
1da177e4 LT |
1208 | |
1209 | local_irq_save(flags); | |
1210 | if (break_state == -1) | |
1211 | custom.adkcon = AC_SETCLR | AC_UARTBRK; | |
1212 | else | |
1213 | custom.adkcon = AC_UARTBRK; | |
1214 | mb(); | |
1215 | local_irq_restore(flags); | |
9e98966c | 1216 | return 0; |
1da177e4 LT |
1217 | } |
1218 | ||
0587102c AC |
1219 | /* |
1220 | * Get counter of input serial line interrupts (DCD,RI,DSR,CTS) | |
1221 | * Return: write counters to the user passed counter struct | |
1222 | * NB: both 1->0 and 0->1 transitions are counted except for | |
1223 | * RI where only 0->1 is counted. | |
1224 | */ | |
1225 | static int rs_get_icount(struct tty_struct *tty, | |
1226 | struct serial_icounter_struct *icount) | |
1227 | { | |
916b7656 | 1228 | struct serial_state *info = tty->driver_data; |
0587102c AC |
1229 | struct async_icount cnow; |
1230 | unsigned long flags; | |
1231 | ||
1232 | local_irq_save(flags); | |
916b7656 | 1233 | cnow = info->icount; |
0587102c AC |
1234 | local_irq_restore(flags); |
1235 | icount->cts = cnow.cts; | |
1236 | icount->dsr = cnow.dsr; | |
1237 | icount->rng = cnow.rng; | |
1238 | icount->dcd = cnow.dcd; | |
1239 | icount->rx = cnow.rx; | |
1240 | icount->tx = cnow.tx; | |
1241 | icount->frame = cnow.frame; | |
1242 | icount->overrun = cnow.overrun; | |
1243 | icount->parity = cnow.parity; | |
1244 | icount->brk = cnow.brk; | |
1245 | icount->buf_overrun = cnow.buf_overrun; | |
1246 | ||
1247 | return 0; | |
1248 | } | |
1da177e4 | 1249 | |
6caa76b7 | 1250 | static int rs_ioctl(struct tty_struct *tty, |
1da177e4 LT |
1251 | unsigned int cmd, unsigned long arg) |
1252 | { | |
916b7656 | 1253 | struct serial_state *info = tty->driver_data; |
1da177e4 | 1254 | struct async_icount cprev, cnow; /* kernel counter temps */ |
ab14caec | 1255 | void __user *argp = (void __user *)arg; |
1da177e4 LT |
1256 | unsigned long flags; |
1257 | ||
1258 | if (serial_paranoia_check(info, tty->name, "rs_ioctl")) | |
1259 | return -ENODEV; | |
1260 | ||
1261 | if ((cmd != TIOCGSERIAL) && (cmd != TIOCSSERIAL) && | |
1262 | (cmd != TIOCSERCONFIG) && (cmd != TIOCSERGSTRUCT) && | |
1263 | (cmd != TIOCMIWAIT) && (cmd != TIOCGICOUNT)) { | |
1264 | if (tty->flags & (1 << TTY_IO_ERROR)) | |
1265 | return -EIO; | |
1266 | } | |
1267 | ||
1268 | switch (cmd) { | |
1269 | case TIOCGSERIAL: | |
ff169e5c | 1270 | return get_serial_info(tty, info, argp); |
1da177e4 | 1271 | case TIOCSSERIAL: |
588993dd | 1272 | return set_serial_info(tty, info, argp); |
1da177e4 LT |
1273 | case TIOCSERCONFIG: |
1274 | return 0; | |
1275 | ||
1276 | case TIOCSERGETLSR: /* Get line status register */ | |
ab14caec | 1277 | return get_lsr_info(info, argp); |
1da177e4 LT |
1278 | |
1279 | case TIOCSERGSTRUCT: | |
ab14caec | 1280 | if (copy_to_user(argp, |
916b7656 | 1281 | info, sizeof(struct serial_state))) |
1da177e4 LT |
1282 | return -EFAULT; |
1283 | return 0; | |
1284 | ||
1285 | /* | |
1286 | * Wait for any of the 4 modem inputs (DCD,RI,DSR,CTS) to change | |
1287 | * - mask passed in arg for lines of interest | |
1288 | * (use |'ed TIOCM_RNG/DSR/CD/CTS for masking) | |
1289 | * Caller should use TIOCGICOUNT to see which one it was | |
1290 | */ | |
1291 | case TIOCMIWAIT: | |
1292 | local_irq_save(flags); | |
1293 | /* note the counters on entry */ | |
916b7656 | 1294 | cprev = info->icount; |
1da177e4 LT |
1295 | local_irq_restore(flags); |
1296 | while (1) { | |
87758791 | 1297 | interruptible_sleep_on(&info->tport.delta_msr_wait); |
1da177e4 LT |
1298 | /* see if a signal did it */ |
1299 | if (signal_pending(current)) | |
1300 | return -ERESTARTSYS; | |
1301 | local_irq_save(flags); | |
916b7656 | 1302 | cnow = info->icount; /* atomic copy */ |
1da177e4 LT |
1303 | local_irq_restore(flags); |
1304 | if (cnow.rng == cprev.rng && cnow.dsr == cprev.dsr && | |
1305 | cnow.dcd == cprev.dcd && cnow.cts == cprev.cts) | |
1306 | return -EIO; /* no change => error */ | |
1307 | if ( ((arg & TIOCM_RNG) && (cnow.rng != cprev.rng)) || | |
1308 | ((arg & TIOCM_DSR) && (cnow.dsr != cprev.dsr)) || | |
1309 | ((arg & TIOCM_CD) && (cnow.dcd != cprev.dcd)) || | |
1310 | ((arg & TIOCM_CTS) && (cnow.cts != cprev.cts)) ) { | |
1311 | return 0; | |
1312 | } | |
1313 | cprev = cnow; | |
1314 | } | |
1315 | /* NOTREACHED */ | |
1316 | ||
1da177e4 LT |
1317 | case TIOCSERGWILD: |
1318 | case TIOCSERSWILD: | |
1319 | /* "setserial -W" is called in Debian boot */ | |
1320 | printk ("TIOCSER?WILD ioctl obsolete, ignored.\n"); | |
1321 | return 0; | |
1322 | ||
1323 | default: | |
1324 | return -ENOIOCTLCMD; | |
1325 | } | |
1326 | return 0; | |
1327 | } | |
1328 | ||
606d099c | 1329 | static void rs_set_termios(struct tty_struct *tty, struct ktermios *old_termios) |
1da177e4 | 1330 | { |
916b7656 | 1331 | struct serial_state *info = tty->driver_data; |
1da177e4 | 1332 | unsigned long flags; |
adc8d746 | 1333 | unsigned int cflag = tty->termios.c_cflag; |
1da177e4 | 1334 | |
588993dd | 1335 | change_speed(tty, info, old_termios); |
1da177e4 LT |
1336 | |
1337 | /* Handle transition to B0 status */ | |
1338 | if ((old_termios->c_cflag & CBAUD) && | |
1339 | !(cflag & CBAUD)) { | |
1340 | info->MCR &= ~(SER_DTR|SER_RTS); | |
1341 | local_irq_save(flags); | |
1342 | rtsdtr_ctrl(info->MCR); | |
1343 | local_irq_restore(flags); | |
1344 | } | |
1345 | ||
1346 | /* Handle transition away from B0 status */ | |
1347 | if (!(old_termios->c_cflag & CBAUD) && | |
1348 | (cflag & CBAUD)) { | |
1349 | info->MCR |= SER_DTR; | |
adc8d746 | 1350 | if (!(tty->termios.c_cflag & CRTSCTS) || |
1da177e4 LT |
1351 | !test_bit(TTY_THROTTLED, &tty->flags)) { |
1352 | info->MCR |= SER_RTS; | |
1353 | } | |
1354 | local_irq_save(flags); | |
1355 | rtsdtr_ctrl(info->MCR); | |
1356 | local_irq_restore(flags); | |
1357 | } | |
1358 | ||
1359 | /* Handle turning off CRTSCTS */ | |
1360 | if ((old_termios->c_cflag & CRTSCTS) && | |
adc8d746 | 1361 | !(tty->termios.c_cflag & CRTSCTS)) { |
1da177e4 LT |
1362 | tty->hw_stopped = 0; |
1363 | rs_start(tty); | |
1364 | } | |
1365 | ||
1366 | #if 0 | |
1367 | /* | |
1368 | * No need to wake up processes in open wait, since they | |
1369 | * sample the CLOCAL flag once, and don't recheck it. | |
1370 | * XXX It's not clear whether the current behavior is correct | |
1371 | * or not. Hence, this may change..... | |
1372 | */ | |
1373 | if (!(old_termios->c_cflag & CLOCAL) && | |
adc8d746 | 1374 | (tty->termios.c_cflag & CLOCAL)) |
1da177e4 LT |
1375 | wake_up_interruptible(&info->open_wait); |
1376 | #endif | |
1377 | } | |
1378 | ||
1379 | /* | |
1380 | * ------------------------------------------------------------ | |
1381 | * rs_close() | |
1382 | * | |
1383 | * This routine is called when the serial port gets closed. First, we | |
1384 | * wait for the last remaining data to be sent. Then, we unlink its | |
1385 | * async structure from the interrupt chain if necessary, and we free | |
1386 | * that IRQ if nothing is left in the chain. | |
1387 | * ------------------------------------------------------------ | |
1388 | */ | |
1389 | static void rs_close(struct tty_struct *tty, struct file * filp) | |
1390 | { | |
916b7656 | 1391 | struct serial_state *state = tty->driver_data; |
7188dc20 | 1392 | struct tty_port *port = &state->tport; |
1da177e4 | 1393 | |
9b937421 | 1394 | if (serial_paranoia_check(state, tty->name, "rs_close")) |
1da177e4 LT |
1395 | return; |
1396 | ||
9b937421 | 1397 | if (tty_port_close_start(port, tty, filp) == 0) |
1da177e4 | 1398 | return; |
1da177e4 | 1399 | |
1da177e4 LT |
1400 | /* |
1401 | * At this point we stop accepting input. To do this, we | |
1402 | * disable the receive line status interrupts, and tell the | |
1403 | * interrupt driver to stop checking the data ready bit in the | |
1404 | * line status register. | |
1405 | */ | |
916b7656 | 1406 | state->read_status_mask &= ~UART_LSR_DR; |
7188dc20 | 1407 | if (port->flags & ASYNC_INITIALIZED) { |
1da177e4 LT |
1408 | /* disable receive interrupts */ |
1409 | custom.intena = IF_RBF; | |
1410 | mb(); | |
1411 | /* clear any pending receive interrupt */ | |
1412 | custom.intreq = IF_RBF; | |
1413 | mb(); | |
1414 | ||
1415 | /* | |
1416 | * Before we drop DTR, make sure the UART transmitter | |
1417 | * has completely drained; this is especially | |
1418 | * important if there is a transmit FIFO! | |
1419 | */ | |
916b7656 | 1420 | rs_wait_until_sent(tty, state->timeout); |
1da177e4 | 1421 | } |
588993dd | 1422 | shutdown(tty, state); |
978e595f | 1423 | rs_flush_buffer(tty); |
1da177e4 LT |
1424 | |
1425 | tty_ldisc_flush(tty); | |
7188dc20 | 1426 | port->tty = NULL; |
b8edebe4 JS |
1427 | |
1428 | tty_port_close_end(port, tty); | |
1da177e4 LT |
1429 | } |
1430 | ||
1431 | /* | |
1432 | * rs_wait_until_sent() --- wait until the transmitter is empty | |
1433 | */ | |
1434 | static void rs_wait_until_sent(struct tty_struct *tty, int timeout) | |
1435 | { | |
916b7656 | 1436 | struct serial_state *info = tty->driver_data; |
1da177e4 LT |
1437 | unsigned long orig_jiffies, char_time; |
1438 | int lsr; | |
1439 | ||
1440 | if (serial_paranoia_check(info, tty->name, "rs_wait_until_sent")) | |
1441 | return; | |
1442 | ||
916b7656 | 1443 | if (info->xmit_fifo_size == 0) |
1da177e4 LT |
1444 | return; /* Just in case.... */ |
1445 | ||
1446 | orig_jiffies = jiffies; | |
978e595f | 1447 | |
1da177e4 LT |
1448 | /* |
1449 | * Set the check interval to be 1/5 of the estimated time to | |
1450 | * send a single character, and make it at least 1. The check | |
1451 | * interval should also be less than the timeout. | |
1452 | * | |
1453 | * Note: we have to use pretty tight timings here to satisfy | |
1454 | * the NIST-PCTS. | |
1455 | */ | |
916b7656 | 1456 | char_time = (info->timeout - HZ/50) / info->xmit_fifo_size; |
1da177e4 LT |
1457 | char_time = char_time / 5; |
1458 | if (char_time == 0) | |
1459 | char_time = 1; | |
1460 | if (timeout) | |
1461 | char_time = min_t(unsigned long, char_time, timeout); | |
1462 | /* | |
1463 | * If the transmitter hasn't cleared in twice the approximate | |
1464 | * amount of time to send the entire FIFO, it probably won't | |
1465 | * ever clear. This assumes the UART isn't doing flow | |
1466 | * control, which is currently the case. Hence, if it ever | |
1467 | * takes longer than info->timeout, this is probably due to a | |
1468 | * UART bug of some kind. So, we clamp the timeout parameter at | |
1469 | * 2*info->timeout. | |
1470 | */ | |
1471 | if (!timeout || timeout > 2*info->timeout) | |
1472 | timeout = 2*info->timeout; | |
1473 | #ifdef SERIAL_DEBUG_RS_WAIT_UNTIL_SENT | |
1474 | printk("In rs_wait_until_sent(%d) check=%lu...", timeout, char_time); | |
1475 | printk("jiff=%lu...", jiffies); | |
1476 | #endif | |
1477 | while(!((lsr = custom.serdatr) & SDR_TSRE)) { | |
1478 | #ifdef SERIAL_DEBUG_RS_WAIT_UNTIL_SENT | |
1479 | printk("serdatr = %d (jiff=%lu)...", lsr, jiffies); | |
1480 | #endif | |
1481 | msleep_interruptible(jiffies_to_msecs(char_time)); | |
1482 | if (signal_pending(current)) | |
1483 | break; | |
1484 | if (timeout && time_after(jiffies, orig_jiffies + timeout)) | |
1485 | break; | |
1486 | } | |
cc0a8fbb | 1487 | __set_current_state(TASK_RUNNING); |
eff4b0b9 | 1488 | |
1da177e4 LT |
1489 | #ifdef SERIAL_DEBUG_RS_WAIT_UNTIL_SENT |
1490 | printk("lsr = %d (jiff=%lu)...done\n", lsr, jiffies); | |
1491 | #endif | |
1492 | } | |
1493 | ||
1494 | /* | |
1495 | * rs_hangup() --- called by tty_hangup() when a hangup is signaled. | |
1496 | */ | |
1497 | static void rs_hangup(struct tty_struct *tty) | |
1498 | { | |
916b7656 | 1499 | struct serial_state *info = tty->driver_data; |
1da177e4 LT |
1500 | |
1501 | if (serial_paranoia_check(info, tty->name, "rs_hangup")) | |
1502 | return; | |
1503 | ||
1da177e4 | 1504 | rs_flush_buffer(tty); |
588993dd | 1505 | shutdown(tty, info); |
12c80354 | 1506 | info->tport.count = 0; |
01bd730d | 1507 | info->tport.flags &= ~ASYNC_NORMAL_ACTIVE; |
87758791 JS |
1508 | info->tport.tty = NULL; |
1509 | wake_up_interruptible(&info->tport.open_wait); | |
1da177e4 LT |
1510 | } |
1511 | ||
1da177e4 LT |
1512 | /* |
1513 | * This routine is called whenever a serial port is opened. It | |
1514 | * enables interrupts for a serial port, linking in its async structure into | |
1515 | * the IRQ chain. It also performs the serial-specific | |
1516 | * initialization for the tty structure. | |
1517 | */ | |
1518 | static int rs_open(struct tty_struct *tty, struct file * filp) | |
1519 | { | |
916b7656 | 1520 | struct serial_state *info = rs_table + tty->index; |
7188dc20 | 1521 | struct tty_port *port = &info->tport; |
410235fd | 1522 | int retval; |
1da177e4 | 1523 | |
7188dc20 JS |
1524 | port->count++; |
1525 | port->tty = tty; | |
916b7656 | 1526 | tty->driver_data = info; |
7188dc20 | 1527 | tty->port = port; |
1da177e4 LT |
1528 | if (serial_paranoia_check(info, tty->name, "rs_open")) |
1529 | return -ENODEV; | |
1530 | ||
7188dc20 | 1531 | tty->low_latency = (port->flags & ASYNC_LOW_LATENCY) ? 1 : 0; |
1da177e4 | 1532 | |
588993dd | 1533 | retval = startup(tty, info); |
1da177e4 LT |
1534 | if (retval) { |
1535 | return retval; | |
1536 | } | |
1537 | ||
6e1aeb03 | 1538 | return tty_port_block_til_ready(port, tty, filp); |
1da177e4 LT |
1539 | } |
1540 | ||
1541 | /* | |
1542 | * /proc fs routines.... | |
1543 | */ | |
1544 | ||
ff169e5c JS |
1545 | static inline void line_info(struct seq_file *m, int line, |
1546 | struct serial_state *state) | |
1da177e4 | 1547 | { |
1da177e4 | 1548 | char stat_buf[30], control, status; |
1da177e4 LT |
1549 | unsigned long flags; |
1550 | ||
ff169e5c | 1551 | seq_printf(m, "%d: uart:amiga_builtin", line); |
1da177e4 | 1552 | |
1da177e4 LT |
1553 | local_irq_save(flags); |
1554 | status = ciab.pra; | |
01bd730d | 1555 | control = (state->tport.flags & ASYNC_INITIALIZED) ? state->MCR : status; |
1da177e4 LT |
1556 | local_irq_restore(flags); |
1557 | ||
1558 | stat_buf[0] = 0; | |
1559 | stat_buf[1] = 0; | |
1560 | if(!(control & SER_RTS)) | |
1561 | strcat(stat_buf, "|RTS"); | |
1562 | if(!(status & SER_CTS)) | |
1563 | strcat(stat_buf, "|CTS"); | |
1564 | if(!(control & SER_DTR)) | |
1565 | strcat(stat_buf, "|DTR"); | |
1566 | if(!(status & SER_DSR)) | |
1567 | strcat(stat_buf, "|DSR"); | |
1568 | if(!(status & SER_DCD)) | |
1569 | strcat(stat_buf, "|CD"); | |
1570 | ||
916b7656 JS |
1571 | if (state->quot) |
1572 | seq_printf(m, " baud:%d", state->baud_base / state->quot); | |
1da177e4 | 1573 | |
d594027d | 1574 | seq_printf(m, " tx:%d rx:%d", state->icount.tx, state->icount.rx); |
1da177e4 LT |
1575 | |
1576 | if (state->icount.frame) | |
d594027d | 1577 | seq_printf(m, " fe:%d", state->icount.frame); |
1da177e4 LT |
1578 | |
1579 | if (state->icount.parity) | |
d594027d | 1580 | seq_printf(m, " pe:%d", state->icount.parity); |
1da177e4 LT |
1581 | |
1582 | if (state->icount.brk) | |
d594027d | 1583 | seq_printf(m, " brk:%d", state->icount.brk); |
1da177e4 LT |
1584 | |
1585 | if (state->icount.overrun) | |
d594027d | 1586 | seq_printf(m, " oe:%d", state->icount.overrun); |
1da177e4 LT |
1587 | |
1588 | /* | |
1589 | * Last thing is the RS-232 status lines | |
1590 | */ | |
d594027d | 1591 | seq_printf(m, " %s\n", stat_buf+1); |
1da177e4 LT |
1592 | } |
1593 | ||
d594027d | 1594 | static int rs_proc_show(struct seq_file *m, void *v) |
1da177e4 | 1595 | { |
d594027d | 1596 | seq_printf(m, "serinfo:1.0 driver:%s\n", serial_version); |
ff169e5c | 1597 | line_info(m, 0, &rs_table[0]); |
d594027d | 1598 | return 0; |
1da177e4 LT |
1599 | } |
1600 | ||
d594027d AD |
1601 | static int rs_proc_open(struct inode *inode, struct file *file) |
1602 | { | |
1603 | return single_open(file, rs_proc_show, NULL); | |
1604 | } | |
1605 | ||
1606 | static const struct file_operations rs_proc_fops = { | |
1607 | .owner = THIS_MODULE, | |
1608 | .open = rs_proc_open, | |
1609 | .read = seq_read, | |
1610 | .llseek = seq_lseek, | |
1611 | .release = single_release, | |
1612 | }; | |
1613 | ||
1da177e4 LT |
1614 | /* |
1615 | * --------------------------------------------------------------------- | |
1616 | * rs_init() and friends | |
1617 | * | |
1618 | * rs_init() is called at boot-time to initialize the serial driver. | |
1619 | * --------------------------------------------------------------------- | |
1620 | */ | |
1621 | ||
1622 | /* | |
1623 | * This routine prints out the appropriate serial driver version | |
1624 | * number, and identifies which options were configured into this | |
1625 | * driver. | |
1626 | */ | |
41c28ff1 | 1627 | static void show_serial_version(void) |
1da177e4 LT |
1628 | { |
1629 | printk(KERN_INFO "%s version %s\n", serial_name, serial_version); | |
1630 | } | |
1631 | ||
1632 | ||
b68e31d0 | 1633 | static const struct tty_operations serial_ops = { |
1da177e4 LT |
1634 | .open = rs_open, |
1635 | .close = rs_close, | |
1636 | .write = rs_write, | |
1637 | .put_char = rs_put_char, | |
1638 | .flush_chars = rs_flush_chars, | |
1639 | .write_room = rs_write_room, | |
1640 | .chars_in_buffer = rs_chars_in_buffer, | |
1641 | .flush_buffer = rs_flush_buffer, | |
1642 | .ioctl = rs_ioctl, | |
1643 | .throttle = rs_throttle, | |
1644 | .unthrottle = rs_unthrottle, | |
1645 | .set_termios = rs_set_termios, | |
1646 | .stop = rs_stop, | |
1647 | .start = rs_start, | |
1648 | .hangup = rs_hangup, | |
1649 | .break_ctl = rs_break, | |
1650 | .send_xchar = rs_send_xchar, | |
1651 | .wait_until_sent = rs_wait_until_sent, | |
1da177e4 LT |
1652 | .tiocmget = rs_tiocmget, |
1653 | .tiocmset = rs_tiocmset, | |
0587102c | 1654 | .get_icount = rs_get_icount, |
d594027d | 1655 | .proc_fops = &rs_proc_fops, |
1da177e4 LT |
1656 | }; |
1657 | ||
f1166604 JS |
1658 | static int amiga_carrier_raised(struct tty_port *port) |
1659 | { | |
1660 | return !(ciab.pra & SER_DCD); | |
1661 | } | |
1662 | ||
1663 | static void amiga_dtr_rts(struct tty_port *port, int raise) | |
1664 | { | |
1665 | struct serial_state *info = container_of(port, struct serial_state, | |
1666 | tport); | |
1667 | unsigned long flags; | |
1668 | ||
1669 | if (raise) | |
1670 | info->MCR |= SER_DTR|SER_RTS; | |
1671 | else | |
1672 | info->MCR &= ~(SER_DTR|SER_RTS); | |
1673 | ||
1674 | local_irq_save(flags); | |
1675 | rtsdtr_ctrl(info->MCR); | |
1676 | local_irq_restore(flags); | |
1677 | } | |
1678 | ||
1679 | static const struct tty_port_operations amiga_port_ops = { | |
1680 | .carrier_raised = amiga_carrier_raised, | |
1681 | .dtr_rts = amiga_dtr_rts, | |
1682 | }; | |
1683 | ||
1da177e4 LT |
1684 | /* |
1685 | * The serial driver boot-time initialization code! | |
1686 | */ | |
826e8c8c | 1687 | static int __init amiga_serial_probe(struct platform_device *pdev) |
1da177e4 LT |
1688 | { |
1689 | unsigned long flags; | |
1690 | struct serial_state * state; | |
5edc304f | 1691 | int error; |
1da177e4 | 1692 | |
410235fd | 1693 | serial_driver = alloc_tty_driver(NR_PORTS); |
1da177e4 LT |
1694 | if (!serial_driver) |
1695 | return -ENOMEM; | |
1696 | ||
1da177e4 LT |
1697 | show_serial_version(); |
1698 | ||
1699 | /* Initialize the tty_driver structure */ | |
1700 | ||
1da177e4 LT |
1701 | serial_driver->driver_name = "amiserial"; |
1702 | serial_driver->name = "ttyS"; | |
1703 | serial_driver->major = TTY_MAJOR; | |
1704 | serial_driver->minor_start = 64; | |
1705 | serial_driver->type = TTY_DRIVER_TYPE_SERIAL; | |
1706 | serial_driver->subtype = SERIAL_TYPE_NORMAL; | |
1707 | serial_driver->init_termios = tty_std_termios; | |
1708 | serial_driver->init_termios.c_cflag = | |
1709 | B9600 | CS8 | CREAD | HUPCL | CLOCAL; | |
1710 | serial_driver->flags = TTY_DRIVER_REAL_RAW; | |
1711 | tty_set_operations(serial_driver, &serial_ops); | |
1712 | ||
1da177e4 | 1713 | state = rs_table; |
1da177e4 | 1714 | state->port = (int)&custom.serdatr; /* Just to give it a value */ |
1da177e4 | 1715 | state->custom_divisor = 0; |
1da177e4 LT |
1716 | state->icount.cts = state->icount.dsr = |
1717 | state->icount.rng = state->icount.dcd = 0; | |
1718 | state->icount.rx = state->icount.tx = 0; | |
1719 | state->icount.frame = state->icount.parity = 0; | |
1720 | state->icount.overrun = state->icount.brk = 0; | |
87758791 | 1721 | tty_port_init(&state->tport); |
f1166604 | 1722 | state->tport.ops = &amiga_port_ops; |
b19e2ca7 JS |
1723 | tty_port_link_device(&state->tport, serial_driver, 0); |
1724 | ||
1725 | error = tty_register_driver(serial_driver); | |
1726 | if (error) | |
1727 | goto fail_put_tty_driver; | |
1da177e4 | 1728 | |
ff169e5c | 1729 | printk(KERN_INFO "ttyS0 is the amiga builtin serial port\n"); |
1da177e4 LT |
1730 | |
1731 | /* Hardware set up */ | |
1732 | ||
1733 | state->baud_base = amiga_colorclock; | |
1734 | state->xmit_fifo_size = 1; | |
1735 | ||
1da177e4 | 1736 | /* set ISRs, and then disable the rx interrupts */ |
5edc304f GU |
1737 | error = request_irq(IRQ_AMIGA_TBE, ser_tx_int, 0, "serial TX", state); |
1738 | if (error) | |
1739 | goto fail_unregister; | |
1740 | ||
9cfb5c05 | 1741 | error = request_irq(IRQ_AMIGA_RBF, ser_rx_int, 0, |
5edc304f GU |
1742 | "serial RX", state); |
1743 | if (error) | |
1744 | goto fail_free_irq; | |
1da177e4 | 1745 | |
c70c036f JL |
1746 | local_irq_save(flags); |
1747 | ||
1da177e4 LT |
1748 | /* turn off Rx and Tx interrupts */ |
1749 | custom.intena = IF_RBF | IF_TBE; | |
1750 | mb(); | |
1751 | ||
1752 | /* clear any pending interrupt */ | |
1753 | custom.intreq = IF_RBF | IF_TBE; | |
1754 | mb(); | |
1755 | ||
1756 | local_irq_restore(flags); | |
1757 | ||
1758 | /* | |
1759 | * set the appropriate directions for the modem control flags, | |
1760 | * and clear RTS and DTR | |
1761 | */ | |
1762 | ciab.ddra |= (SER_DTR | SER_RTS); /* outputs */ | |
1763 | ciab.ddra &= ~(SER_DCD | SER_CTS | SER_DSR); /* inputs */ | |
1764 | ||
826e8c8c GU |
1765 | platform_set_drvdata(pdev, state); |
1766 | ||
1da177e4 | 1767 | return 0; |
5edc304f GU |
1768 | |
1769 | fail_free_irq: | |
1770 | free_irq(IRQ_AMIGA_TBE, state); | |
1771 | fail_unregister: | |
1772 | tty_unregister_driver(serial_driver); | |
5edc304f GU |
1773 | fail_put_tty_driver: |
1774 | put_tty_driver(serial_driver); | |
1775 | return error; | |
1da177e4 LT |
1776 | } |
1777 | ||
826e8c8c | 1778 | static int __exit amiga_serial_remove(struct platform_device *pdev) |
1da177e4 LT |
1779 | { |
1780 | int error; | |
826e8c8c | 1781 | struct serial_state *state = platform_get_drvdata(pdev); |
1da177e4 LT |
1782 | |
1783 | /* printk("Unloading %s: version %s\n", serial_name, serial_version); */ | |
1da177e4 LT |
1784 | if ((error = tty_unregister_driver(serial_driver))) |
1785 | printk("SERIAL: failed to unregister serial driver (%d)\n", | |
1786 | error); | |
1787 | put_tty_driver(serial_driver); | |
1788 | ||
916b7656 JS |
1789 | free_irq(IRQ_AMIGA_TBE, state); |
1790 | free_irq(IRQ_AMIGA_RBF, state); | |
5edc304f | 1791 | |
826e8c8c GU |
1792 | platform_set_drvdata(pdev, NULL); |
1793 | ||
1794 | return error; | |
1795 | } | |
1796 | ||
1797 | static struct platform_driver amiga_serial_driver = { | |
1798 | .remove = __exit_p(amiga_serial_remove), | |
1799 | .driver = { | |
1800 | .name = "amiga-serial", | |
1801 | .owner = THIS_MODULE, | |
1802 | }, | |
1803 | }; | |
1804 | ||
1805 | static int __init amiga_serial_init(void) | |
1806 | { | |
1807 | return platform_driver_probe(&amiga_serial_driver, amiga_serial_probe); | |
1808 | } | |
1809 | ||
1810 | module_init(amiga_serial_init); | |
1811 | ||
1812 | static void __exit amiga_serial_exit(void) | |
1813 | { | |
1814 | platform_driver_unregister(&amiga_serial_driver); | |
1da177e4 LT |
1815 | } |
1816 | ||
826e8c8c | 1817 | module_exit(amiga_serial_exit); |
1da177e4 LT |
1818 | |
1819 | ||
d1a35e4d GU |
1820 | #if defined(CONFIG_SERIAL_CONSOLE) && !defined(MODULE) |
1821 | ||
1da177e4 LT |
1822 | /* |
1823 | * ------------------------------------------------------------ | |
1824 | * Serial console driver | |
1825 | * ------------------------------------------------------------ | |
1826 | */ | |
1da177e4 LT |
1827 | |
1828 | static void amiga_serial_putc(char c) | |
1829 | { | |
1830 | custom.serdat = (unsigned char)c | 0x100; | |
1831 | while (!(custom.serdatr & 0x2000)) | |
1832 | barrier(); | |
1833 | } | |
1834 | ||
1835 | /* | |
1836 | * Print a string to the serial port trying not to disturb | |
1837 | * any possible real use of the port... | |
1838 | * | |
1839 | * The console must be locked when we get here. | |
1840 | */ | |
1841 | static void serial_console_write(struct console *co, const char *s, | |
1842 | unsigned count) | |
1843 | { | |
1844 | unsigned short intena = custom.intenar; | |
1845 | ||
1846 | custom.intena = IF_TBE; | |
1847 | ||
1848 | while (count--) { | |
1849 | if (*s == '\n') | |
1850 | amiga_serial_putc('\r'); | |
1851 | amiga_serial_putc(*s++); | |
1852 | } | |
1853 | ||
1854 | custom.intena = IF_SETCLR | (intena & IF_TBE); | |
1855 | } | |
1856 | ||
1857 | static struct tty_driver *serial_console_device(struct console *c, int *index) | |
1858 | { | |
1859 | *index = 0; | |
1860 | return serial_driver; | |
1861 | } | |
1862 | ||
1863 | static struct console sercons = { | |
1864 | .name = "ttyS", | |
1865 | .write = serial_console_write, | |
1866 | .device = serial_console_device, | |
1867 | .flags = CON_PRINTBUFFER, | |
1868 | .index = -1, | |
1869 | }; | |
1870 | ||
1871 | /* | |
1872 | * Register console. | |
1873 | */ | |
1874 | static int __init amiserial_console_init(void) | |
1875 | { | |
1876 | register_console(&sercons); | |
1877 | return 0; | |
1878 | } | |
1879 | console_initcall(amiserial_console_init); | |
d1a35e4d GU |
1880 | |
1881 | #endif /* CONFIG_SERIAL_CONSOLE && !MODULE */ | |
1da177e4 LT |
1882 | |
1883 | MODULE_LICENSE("GPL"); | |
826e8c8c | 1884 | MODULE_ALIAS("platform:amiga-serial"); |