Commit | Line | Data |
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1da177e4 LT |
1 | /* 68328serial.c: Serial port driver for 68328 microcontroller |
2 | * | |
3 | * Copyright (C) 1995 David S. Miller <davem@caip.rutgers.edu> | |
4 | * Copyright (C) 1998 Kenneth Albanowski <kjahds@kjahds.com> | |
5 | * Copyright (C) 1998, 1999 D. Jeff Dionne <jeff@uclinux.org> | |
6 | * Copyright (C) 1999 Vladimir Gurevich <vgurevic@cisco.com> | |
7 | * Copyright (C) 2002-2003 David McCullough <davidm@snapgear.com> | |
8 | * Copyright (C) 2002 Greg Ungerer <gerg@snapgear.com> | |
9 | * | |
10 | * VZ Support/Fixes Evan Stawnyczy <e@lineo.ca> | |
11 | * Multiple UART support Daniel Potts <danielp@cse.unsw.edu.au> | |
12 | * Power management support Daniel Potts <danielp@cse.unsw.edu.au> | |
13 | * VZ Second Serial Port enable Phil Wilshire | |
14 | * 2.4/2.5 port David McCullough | |
15 | */ | |
16 | ||
17 | #include <asm/dbg.h> | |
18 | #include <linux/module.h> | |
19 | #include <linux/errno.h> | |
cea4b2ce | 20 | #include <linux/serial.h> |
1da177e4 LT |
21 | #include <linux/signal.h> |
22 | #include <linux/sched.h> | |
23 | #include <linux/timer.h> | |
24 | #include <linux/interrupt.h> | |
25 | #include <linux/tty.h> | |
26 | #include <linux/tty_flip.h> | |
1da177e4 LT |
27 | #include <linux/major.h> |
28 | #include <linux/string.h> | |
29 | #include <linux/fcntl.h> | |
30 | #include <linux/mm.h> | |
31 | #include <linux/kernel.h> | |
32 | #include <linux/console.h> | |
33 | #include <linux/reboot.h> | |
34 | #include <linux/keyboard.h> | |
35 | #include <linux/init.h> | |
36 | #include <linux/pm.h> | |
37 | #include <linux/bitops.h> | |
38 | #include <linux/delay.h> | |
5a0e3ad6 | 39 | #include <linux/gfp.h> |
1da177e4 LT |
40 | |
41 | #include <asm/io.h> | |
42 | #include <asm/irq.h> | |
1da177e4 LT |
43 | #include <asm/delay.h> |
44 | #include <asm/uaccess.h> | |
45 | ||
46 | /* (es) */ | |
47 | /* note: perhaps we can murge these files, so that you can just | |
48 | * define 1 of them, and they can sort that out for themselves | |
49 | */ | |
50 | #if defined(CONFIG_M68EZ328) | |
51 | #include <asm/MC68EZ328.h> | |
52 | #else | |
53 | #if defined(CONFIG_M68VZ328) | |
54 | #include <asm/MC68VZ328.h> | |
55 | #else | |
56 | #include <asm/MC68328.h> | |
57 | #endif /* CONFIG_M68VZ328 */ | |
58 | #endif /* CONFIG_M68EZ328 */ | |
59 | ||
1da177e4 LT |
60 | /* Turn off usage of real serial interrupt code, to "support" Copilot */ |
61 | #ifdef CONFIG_XCOPILOT_BUGS | |
62 | #undef USE_INTS | |
63 | #else | |
64 | #define USE_INTS | |
65 | #endif | |
66 | ||
1bb2687c JS |
67 | /* |
68 | * I believe this is the optimal setting that reduces the number of interrupts. | |
69 | * At high speeds the output might become a little "bursted" (use USTCNT_TXHE | |
70 | * if that bothers you), but in most cases it will not, since we try to | |
71 | * transmit characters every time rs_interrupt is called. Thus, quite often | |
72 | * you'll see that a receive interrupt occures before the transmit one. | |
73 | * -- Vladimir Gurevich | |
74 | */ | |
75 | #define USTCNT_TX_INTR_MASK (USTCNT_TXEE) | |
76 | ||
77 | /* | |
78 | * 68328 and 68EZ328 UARTS are a little bit different. EZ328 has special | |
79 | * "Old data interrupt" which occures whenever the data stay in the FIFO | |
80 | * longer than 30 bits time. This allows us to use FIFO without compromising | |
81 | * latency. '328 does not have this feature and without the real 328-based | |
82 | * board I would assume that RXRE is the safest setting. | |
83 | * | |
84 | * For EZ328 I use RXHE (Half empty) interrupt to reduce the number of | |
85 | * interrupts. RXFE (receive queue full) causes the system to lose data | |
86 | * at least at 115200 baud | |
87 | * | |
88 | * If your board is busy doing other stuff, you might consider to use | |
89 | * RXRE (data ready intrrupt) instead. | |
90 | * | |
91 | * The other option is to make these INTR masks run-time configurable, so | |
92 | * that people can dynamically adapt them according to the current usage. | |
93 | * -- Vladimir Gurevich | |
94 | */ | |
95 | ||
96 | /* (es) */ | |
97 | #if defined(CONFIG_M68EZ328) || defined(CONFIG_M68VZ328) | |
98 | #define USTCNT_RX_INTR_MASK (USTCNT_RXHE | USTCNT_ODEN) | |
99 | #elif defined(CONFIG_M68328) | |
100 | #define USTCNT_RX_INTR_MASK (USTCNT_RXRE) | |
101 | #else | |
102 | #error Please, define the Rx interrupt events for your CPU | |
103 | #endif | |
104 | /* (/es) */ | |
105 | ||
106 | /* | |
107 | * This is our internal structure for each serial port's state. | |
1bb2687c JS |
108 | */ |
109 | struct m68k_serial { | |
86264341 | 110 | struct tty_port tport; |
1bb2687c JS |
111 | char is_cons; /* Is this our console. */ |
112 | int magic; | |
113 | int baud_base; | |
114 | int port; | |
115 | int irq; | |
1bb2687c | 116 | int type; /* UART type */ |
1bb2687c JS |
117 | int custom_divisor; |
118 | int x_char; /* xon/xoff character */ | |
1bb2687c | 119 | int line; |
1bb2687c JS |
120 | unsigned char *xmit_buf; |
121 | int xmit_head; | |
122 | int xmit_tail; | |
123 | int xmit_cnt; | |
1bb2687c JS |
124 | }; |
125 | ||
126 | #define SERIAL_MAGIC 0x5301 | |
127 | ||
128 | /* | |
129 | * Define the number of ports supported and their irqs. | |
130 | */ | |
131 | #define NR_PORTS 1 | |
132 | ||
1da177e4 | 133 | static struct m68k_serial m68k_soft[NR_PORTS]; |
1da177e4 | 134 | |
1bb2687c | 135 | static unsigned int uart_irqs[NR_PORTS] = { UART_IRQ_NUM }; |
1da177e4 LT |
136 | |
137 | /* multiple ports are contiguous in memory */ | |
138 | m68328_uart *uart_addr = (m68328_uart *)USTCNT_ADDR; | |
139 | ||
1da177e4 LT |
140 | struct tty_driver *serial_driver; |
141 | ||
467712c9 | 142 | static void change_speed(struct m68k_serial *info, struct tty_struct *tty); |
1da177e4 LT |
143 | |
144 | /* | |
145 | * Setup for console. Argument comes from the boot command line. | |
146 | */ | |
147 | ||
f5e92c3f CE |
148 | /* note: this is messy, but it works, again, perhaps defined somewhere else?*/ |
149 | #ifdef CONFIG_M68VZ328 | |
150 | #define CONSOLE_BAUD_RATE 19200 | |
151 | #define DEFAULT_CBAUD B19200 | |
1da177e4 LT |
152 | #endif |
153 | ||
f5e92c3f | 154 | |
1da177e4 LT |
155 | #ifndef CONSOLE_BAUD_RATE |
156 | #define CONSOLE_BAUD_RATE 9600 | |
157 | #define DEFAULT_CBAUD B9600 | |
158 | #endif | |
159 | ||
160 | ||
161 | static int m68328_console_initted = 0; | |
162 | static int m68328_console_baud = CONSOLE_BAUD_RATE; | |
163 | static int m68328_console_cbaud = DEFAULT_CBAUD; | |
164 | ||
165 | ||
1da177e4 LT |
166 | static inline int serial_paranoia_check(struct m68k_serial *info, |
167 | char *name, const char *routine) | |
168 | { | |
169 | #ifdef SERIAL_PARANOIA_CHECK | |
170 | static const char *badmagic = | |
171 | "Warning: bad magic number for serial struct %s in %s\n"; | |
172 | static const char *badinfo = | |
173 | "Warning: null m68k_serial for %s in %s\n"; | |
174 | ||
175 | if (!info) { | |
176 | printk(badinfo, name, routine); | |
177 | return 1; | |
178 | } | |
179 | if (info->magic != SERIAL_MAGIC) { | |
180 | printk(badmagic, name, routine); | |
181 | return 1; | |
182 | } | |
183 | #endif | |
184 | return 0; | |
185 | } | |
186 | ||
187 | /* | |
188 | * This is used to figure out the divisor speeds and the timeouts | |
189 | */ | |
190 | static int baud_table[] = { | |
191 | 0, 50, 75, 110, 134, 150, 200, 300, 600, 1200, 1800, 2400, 4800, | |
192 | 9600, 19200, 38400, 57600, 115200, 0 }; | |
193 | ||
1da177e4 LT |
194 | /* Utility routines */ |
195 | static inline int get_baud(struct m68k_serial *ss) | |
196 | { | |
197 | unsigned long result = 115200; | |
198 | unsigned short int baud = uart_addr[ss->line].ubaud; | |
199 | if (GET_FIELD(baud, UBAUD_PRESCALER) == 0x38) result = 38400; | |
200 | result >>= GET_FIELD(baud, UBAUD_DIVIDE); | |
201 | ||
202 | return result; | |
203 | } | |
204 | ||
205 | /* | |
206 | * ------------------------------------------------------------ | |
207 | * rs_stop() and rs_start() | |
208 | * | |
209 | * This routines are called before setting or resetting tty->stopped. | |
210 | * They enable or disable transmitter interrupts, as necessary. | |
211 | * ------------------------------------------------------------ | |
212 | */ | |
213 | static void rs_stop(struct tty_struct *tty) | |
214 | { | |
215 | struct m68k_serial *info = (struct m68k_serial *)tty->driver_data; | |
216 | m68328_uart *uart = &uart_addr[info->line]; | |
217 | unsigned long flags; | |
218 | ||
219 | if (serial_paranoia_check(info, tty->name, "rs_stop")) | |
220 | return; | |
221 | ||
727dda80 | 222 | local_irq_save(flags); |
1da177e4 | 223 | uart->ustcnt &= ~USTCNT_TXEN; |
727dda80 | 224 | local_irq_restore(flags); |
1da177e4 LT |
225 | } |
226 | ||
09a6ffa8 | 227 | static int rs_put_char(char ch) |
1da177e4 | 228 | { |
107afb7a JS |
229 | unsigned long flags; |
230 | int loops = 0; | |
1da177e4 | 231 | |
727dda80 | 232 | local_irq_save(flags); |
1da177e4 LT |
233 | |
234 | while (!(UTX & UTX_TX_AVAIL) && (loops < 1000)) { | |
235 | loops++; | |
236 | udelay(5); | |
237 | } | |
238 | ||
239 | UTX_TXDATA = ch; | |
240 | udelay(5); | |
727dda80 | 241 | local_irq_restore(flags); |
09a6ffa8 | 242 | return 1; |
1da177e4 LT |
243 | } |
244 | ||
245 | static void rs_start(struct tty_struct *tty) | |
246 | { | |
247 | struct m68k_serial *info = (struct m68k_serial *)tty->driver_data; | |
248 | m68328_uart *uart = &uart_addr[info->line]; | |
249 | unsigned long flags; | |
250 | ||
251 | if (serial_paranoia_check(info, tty->name, "rs_start")) | |
252 | return; | |
253 | ||
727dda80 | 254 | local_irq_save(flags); |
1da177e4 LT |
255 | if (info->xmit_cnt && info->xmit_buf && !(uart->ustcnt & USTCNT_TXEN)) { |
256 | #ifdef USE_INTS | |
257 | uart->ustcnt |= USTCNT_TXEN | USTCNT_TX_INTR_MASK; | |
258 | #else | |
259 | uart->ustcnt |= USTCNT_TXEN; | |
260 | #endif | |
261 | } | |
727dda80 | 262 | local_irq_restore(flags); |
1da177e4 LT |
263 | } |
264 | ||
6732c8bb | 265 | static void receive_chars(struct m68k_serial *info, unsigned short rx) |
1da177e4 | 266 | { |
1da177e4 | 267 | m68328_uart *uart = &uart_addr[info->line]; |
33f0f88f | 268 | unsigned char ch, flag; |
1da177e4 LT |
269 | |
270 | /* | |
271 | * This do { } while() loop will get ALL chars out of Rx FIFO | |
272 | */ | |
273 | #ifndef CONFIG_XCOPILOT_BUGS | |
274 | do { | |
275 | #endif | |
276 | ch = GET_FIELD(rx, URX_RXDATA); | |
277 | ||
278 | if(info->is_cons) { | |
279 | if(URX_BREAK & rx) { /* whee, break received */ | |
1da177e4 LT |
280 | return; |
281 | #ifdef CONFIG_MAGIC_SYSRQ | |
282 | } else if (ch == 0x10) { /* ^P */ | |
283 | show_state(); | |
7bf02ea2 | 284 | show_free_areas(0); |
1da177e4 LT |
285 | show_buffers(); |
286 | /* show_net_buffers(); */ | |
287 | return; | |
288 | } else if (ch == 0x12) { /* ^R */ | |
804ebf46 | 289 | emergency_restart(); |
1da177e4 LT |
290 | return; |
291 | #endif /* CONFIG_MAGIC_SYSRQ */ | |
292 | } | |
1da177e4 LT |
293 | } |
294 | ||
33f0f88f AC |
295 | flag = TTY_NORMAL; |
296 | ||
c21e2654 | 297 | if (rx & URX_PARITY_ERROR) |
33f0f88f | 298 | flag = TTY_PARITY; |
c21e2654 | 299 | else if (rx & URX_OVRUN) |
33f0f88f | 300 | flag = TTY_OVERRUN; |
c21e2654 | 301 | else if (rx & URX_FRAME_ERROR) |
33f0f88f | 302 | flag = TTY_FRAME; |
c21e2654 | 303 | |
92a19f9c | 304 | tty_insert_flip_char(&info->tport, ch, flag); |
1da177e4 LT |
305 | #ifndef CONFIG_XCOPILOT_BUGS |
306 | } while((rx = uart->urx.w) & URX_DATA_READY); | |
307 | #endif | |
308 | ||
6732c8bb | 309 | tty_schedule_flip(&info->tport); |
1da177e4 LT |
310 | } |
311 | ||
467712c9 | 312 | static void transmit_chars(struct m68k_serial *info, struct tty_struct *tty) |
1da177e4 LT |
313 | { |
314 | m68328_uart *uart = &uart_addr[info->line]; | |
315 | ||
316 | if (info->x_char) { | |
317 | /* Send next char */ | |
318 | uart->utx.b.txdata = info->x_char; | |
319 | info->x_char = 0; | |
320 | goto clear_and_return; | |
321 | } | |
322 | ||
467712c9 | 323 | if ((info->xmit_cnt <= 0) || !tty || tty->stopped) { |
1da177e4 LT |
324 | /* That's peculiar... TX ints off */ |
325 | uart->ustcnt &= ~USTCNT_TX_INTR_MASK; | |
326 | goto clear_and_return; | |
327 | } | |
328 | ||
329 | /* Send char */ | |
330 | uart->utx.b.txdata = info->xmit_buf[info->xmit_tail++]; | |
331 | info->xmit_tail = info->xmit_tail & (SERIAL_XMIT_SIZE-1); | |
332 | info->xmit_cnt--; | |
333 | ||
1da177e4 LT |
334 | if(info->xmit_cnt <= 0) { |
335 | /* All done for now... TX ints off */ | |
336 | uart->ustcnt &= ~USTCNT_TX_INTR_MASK; | |
337 | goto clear_and_return; | |
338 | } | |
339 | ||
340 | clear_and_return: | |
341 | /* Clear interrupt (should be auto)*/ | |
342 | return; | |
343 | } | |
344 | ||
345 | /* | |
346 | * This is the serial driver's generic interrupt routine | |
347 | */ | |
7d12e780 | 348 | irqreturn_t rs_interrupt(int irq, void *dev_id) |
1da177e4 | 349 | { |
25db8ad5 | 350 | struct m68k_serial *info = dev_id; |
665569d0 | 351 | struct tty_struct *tty = tty_port_tty_get(&info->tport); |
1da177e4 LT |
352 | m68328_uart *uart; |
353 | unsigned short rx; | |
354 | unsigned short tx; | |
355 | ||
1da177e4 LT |
356 | uart = &uart_addr[info->line]; |
357 | rx = uart->urx.w; | |
358 | ||
359 | #ifdef USE_INTS | |
360 | tx = uart->utx.w; | |
361 | ||
467712c9 | 362 | if (rx & URX_DATA_READY) |
6732c8bb | 363 | receive_chars(info, rx); |
467712c9 JS |
364 | if (tx & UTX_TX_AVAIL) |
365 | transmit_chars(info, tty); | |
1da177e4 | 366 | #else |
6732c8bb | 367 | receive_chars(info, rx); |
1da177e4 | 368 | #endif |
665569d0 JS |
369 | tty_kref_put(tty); |
370 | ||
1da177e4 LT |
371 | return IRQ_HANDLED; |
372 | } | |
373 | ||
467712c9 | 374 | static int startup(struct m68k_serial *info, struct tty_struct *tty) |
1da177e4 LT |
375 | { |
376 | m68328_uart *uart = &uart_addr[info->line]; | |
377 | unsigned long flags; | |
378 | ||
a85dd82c | 379 | if (info->tport.flags & ASYNC_INITIALIZED) |
1da177e4 LT |
380 | return 0; |
381 | ||
382 | if (!info->xmit_buf) { | |
383 | info->xmit_buf = (unsigned char *) __get_free_page(GFP_KERNEL); | |
384 | if (!info->xmit_buf) | |
385 | return -ENOMEM; | |
386 | } | |
387 | ||
727dda80 | 388 | local_irq_save(flags); |
1da177e4 LT |
389 | |
390 | /* | |
391 | * Clear the FIFO buffers and disable them | |
392 | * (they will be reenabled in change_speed()) | |
393 | */ | |
394 | ||
395 | uart->ustcnt = USTCNT_UEN; | |
1da177e4 LT |
396 | uart->ustcnt = USTCNT_UEN | USTCNT_RXEN | USTCNT_TXEN; |
397 | (void)uart->urx.w; | |
398 | ||
399 | /* | |
400 | * Finally, enable sequencing and interrupts | |
401 | */ | |
402 | #ifdef USE_INTS | |
403 | uart->ustcnt = USTCNT_UEN | USTCNT_RXEN | | |
404 | USTCNT_RX_INTR_MASK | USTCNT_TX_INTR_MASK; | |
405 | #else | |
406 | uart->ustcnt = USTCNT_UEN | USTCNT_RXEN | USTCNT_RX_INTR_MASK; | |
407 | #endif | |
408 | ||
467712c9 JS |
409 | if (tty) |
410 | clear_bit(TTY_IO_ERROR, &tty->flags); | |
1da177e4 LT |
411 | info->xmit_cnt = info->xmit_head = info->xmit_tail = 0; |
412 | ||
413 | /* | |
414 | * and set the speed of the serial port | |
415 | */ | |
416 | ||
467712c9 | 417 | change_speed(info, tty); |
1da177e4 | 418 | |
a85dd82c | 419 | info->tport.flags |= ASYNC_INITIALIZED; |
727dda80 | 420 | local_irq_restore(flags); |
1da177e4 LT |
421 | return 0; |
422 | } | |
423 | ||
424 | /* | |
425 | * This routine will shutdown a serial port; interrupts are disabled, and | |
426 | * DTR is dropped if the hangup on close termio flag is on. | |
427 | */ | |
467712c9 | 428 | static void shutdown(struct m68k_serial *info, struct tty_struct *tty) |
1da177e4 LT |
429 | { |
430 | m68328_uart *uart = &uart_addr[info->line]; | |
431 | unsigned long flags; | |
432 | ||
433 | uart->ustcnt = 0; /* All off! */ | |
a85dd82c | 434 | if (!(info->tport.flags & ASYNC_INITIALIZED)) |
1da177e4 LT |
435 | return; |
436 | ||
727dda80 | 437 | local_irq_save(flags); |
1da177e4 LT |
438 | |
439 | if (info->xmit_buf) { | |
440 | free_page((unsigned long) info->xmit_buf); | |
441 | info->xmit_buf = 0; | |
442 | } | |
443 | ||
467712c9 JS |
444 | if (tty) |
445 | set_bit(TTY_IO_ERROR, &tty->flags); | |
1da177e4 | 446 | |
a85dd82c | 447 | info->tport.flags &= ~ASYNC_INITIALIZED; |
727dda80 | 448 | local_irq_restore(flags); |
1da177e4 LT |
449 | } |
450 | ||
451 | struct { | |
452 | int divisor, prescale; | |
453 | } | |
454 | #ifndef CONFIG_M68VZ328 | |
455 | hw_baud_table[18] = { | |
456 | {0,0}, /* 0 */ | |
457 | {0,0}, /* 50 */ | |
458 | {0,0}, /* 75 */ | |
459 | {0,0}, /* 110 */ | |
460 | {0,0}, /* 134 */ | |
461 | {0,0}, /* 150 */ | |
462 | {0,0}, /* 200 */ | |
463 | {7,0x26}, /* 300 */ | |
464 | {6,0x26}, /* 600 */ | |
465 | {5,0x26}, /* 1200 */ | |
466 | {0,0}, /* 1800 */ | |
467 | {4,0x26}, /* 2400 */ | |
468 | {3,0x26}, /* 4800 */ | |
469 | {2,0x26}, /* 9600 */ | |
470 | {1,0x26}, /* 19200 */ | |
471 | {0,0x26}, /* 38400 */ | |
472 | {1,0x38}, /* 57600 */ | |
473 | {0,0x38}, /* 115200 */ | |
474 | }; | |
475 | #else | |
476 | hw_baud_table[18] = { | |
477 | {0,0}, /* 0 */ | |
478 | {0,0}, /* 50 */ | |
479 | {0,0}, /* 75 */ | |
480 | {0,0}, /* 110 */ | |
481 | {0,0}, /* 134 */ | |
482 | {0,0}, /* 150 */ | |
483 | {0,0}, /* 200 */ | |
484 | {0,0}, /* 300 */ | |
485 | {7,0x26}, /* 600 */ | |
486 | {6,0x26}, /* 1200 */ | |
487 | {0,0}, /* 1800 */ | |
488 | {5,0x26}, /* 2400 */ | |
489 | {4,0x26}, /* 4800 */ | |
490 | {3,0x26}, /* 9600 */ | |
491 | {2,0x26}, /* 19200 */ | |
492 | {1,0x26}, /* 38400 */ | |
493 | {0,0x26}, /* 57600 */ | |
494 | {1,0x38}, /* 115200 */ | |
495 | }; | |
496 | #endif | |
497 | /* rate = 1036800 / ((65 - prescale) * (1<<divider)) */ | |
498 | ||
499 | /* | |
500 | * This routine is called to set the UART divisor registers to match | |
501 | * the specified baud rate for a serial port. | |
502 | */ | |
467712c9 | 503 | static void change_speed(struct m68k_serial *info, struct tty_struct *tty) |
1da177e4 LT |
504 | { |
505 | m68328_uart *uart = &uart_addr[info->line]; | |
506 | unsigned short port; | |
507 | unsigned short ustcnt; | |
508 | unsigned cflag; | |
509 | int i; | |
510 | ||
3dd332c5 | 511 | cflag = tty->termios.c_cflag; |
1da177e4 LT |
512 | if (!(port = info->port)) |
513 | return; | |
514 | ||
515 | ustcnt = uart->ustcnt; | |
516 | uart->ustcnt = ustcnt & ~USTCNT_TXEN; | |
517 | ||
518 | i = cflag & CBAUD; | |
519 | if (i & CBAUDEX) { | |
520 | i = (i & ~CBAUDEX) + B38400; | |
521 | } | |
522 | ||
1da177e4 LT |
523 | uart->ubaud = PUT_FIELD(UBAUD_DIVIDE, hw_baud_table[i].divisor) | |
524 | PUT_FIELD(UBAUD_PRESCALER, hw_baud_table[i].prescale); | |
525 | ||
526 | ustcnt &= ~(USTCNT_PARITYEN | USTCNT_ODD_EVEN | USTCNT_STOP | USTCNT_8_7); | |
527 | ||
528 | if ((cflag & CSIZE) == CS8) | |
529 | ustcnt |= USTCNT_8_7; | |
530 | ||
531 | if (cflag & CSTOPB) | |
532 | ustcnt |= USTCNT_STOP; | |
533 | ||
534 | if (cflag & PARENB) | |
535 | ustcnt |= USTCNT_PARITYEN; | |
536 | if (cflag & PARODD) | |
537 | ustcnt |= USTCNT_ODD_EVEN; | |
538 | ||
539 | #ifdef CONFIG_SERIAL_68328_RTS_CTS | |
540 | if (cflag & CRTSCTS) { | |
541 | uart->utx.w &= ~ UTX_NOCTS; | |
542 | } else { | |
543 | uart->utx.w |= UTX_NOCTS; | |
544 | } | |
545 | #endif | |
546 | ||
547 | ustcnt |= USTCNT_TXEN; | |
548 | ||
549 | uart->ustcnt = ustcnt; | |
550 | return; | |
551 | } | |
552 | ||
553 | /* | |
554 | * Fair output driver allows a process to speak. | |
555 | */ | |
556 | static void rs_fair_output(void) | |
557 | { | |
558 | int left; /* Output no more than that */ | |
559 | unsigned long flags; | |
560 | struct m68k_serial *info = &m68k_soft[0]; | |
561 | char c; | |
562 | ||
563 | if (info == 0) return; | |
564 | if (info->xmit_buf == 0) return; | |
565 | ||
727dda80 | 566 | local_irq_save(flags); |
1da177e4 LT |
567 | left = info->xmit_cnt; |
568 | while (left != 0) { | |
569 | c = info->xmit_buf[info->xmit_tail]; | |
570 | info->xmit_tail = (info->xmit_tail+1) & (SERIAL_XMIT_SIZE-1); | |
571 | info->xmit_cnt--; | |
727dda80 | 572 | local_irq_restore(flags); |
1da177e4 LT |
573 | |
574 | rs_put_char(c); | |
575 | ||
727dda80 | 576 | local_irq_save(flags); |
1da177e4 LT |
577 | left = min(info->xmit_cnt, left-1); |
578 | } | |
579 | ||
580 | /* Last character is being transmitted now (hopefully). */ | |
581 | udelay(5); | |
582 | ||
727dda80 | 583 | local_irq_restore(flags); |
1da177e4 LT |
584 | return; |
585 | } | |
586 | ||
587 | /* | |
588 | * m68k_console_print is registered for printk. | |
589 | */ | |
590 | void console_print_68328(const char *p) | |
591 | { | |
592 | char c; | |
593 | ||
594 | while((c=*(p++)) != 0) { | |
595 | if(c == '\n') | |
596 | rs_put_char('\r'); | |
597 | rs_put_char(c); | |
598 | } | |
599 | ||
600 | /* Comment this if you want to have a strict interrupt-driven output */ | |
601 | rs_fair_output(); | |
602 | ||
603 | return; | |
604 | } | |
605 | ||
606 | static void rs_set_ldisc(struct tty_struct *tty) | |
607 | { | |
608 | struct m68k_serial *info = (struct m68k_serial *)tty->driver_data; | |
609 | ||
610 | if (serial_paranoia_check(info, tty->name, "rs_set_ldisc")) | |
611 | return; | |
612 | ||
3dd332c5 | 613 | info->is_cons = (tty->termios.c_line == N_TTY); |
1da177e4 LT |
614 | |
615 | printk("ttyS%d console mode %s\n", info->line, info->is_cons ? "on" : "off"); | |
616 | } | |
617 | ||
618 | static void rs_flush_chars(struct tty_struct *tty) | |
619 | { | |
620 | struct m68k_serial *info = (struct m68k_serial *)tty->driver_data; | |
621 | m68328_uart *uart = &uart_addr[info->line]; | |
622 | unsigned long flags; | |
623 | ||
624 | if (serial_paranoia_check(info, tty->name, "rs_flush_chars")) | |
625 | return; | |
626 | #ifndef USE_INTS | |
627 | for(;;) { | |
628 | #endif | |
629 | ||
630 | /* Enable transmitter */ | |
727dda80 | 631 | local_irq_save(flags); |
1da177e4 LT |
632 | |
633 | if (info->xmit_cnt <= 0 || tty->stopped || tty->hw_stopped || | |
634 | !info->xmit_buf) { | |
727dda80 | 635 | local_irq_restore(flags); |
1da177e4 LT |
636 | return; |
637 | } | |
638 | ||
639 | #ifdef USE_INTS | |
640 | uart->ustcnt |= USTCNT_TXEN | USTCNT_TX_INTR_MASK; | |
641 | #else | |
642 | uart->ustcnt |= USTCNT_TXEN; | |
643 | #endif | |
644 | ||
645 | #ifdef USE_INTS | |
646 | if (uart->utx.w & UTX_TX_AVAIL) { | |
647 | #else | |
648 | if (1) { | |
649 | #endif | |
650 | /* Send char */ | |
651 | uart->utx.b.txdata = info->xmit_buf[info->xmit_tail++]; | |
652 | info->xmit_tail = info->xmit_tail & (SERIAL_XMIT_SIZE-1); | |
653 | info->xmit_cnt--; | |
654 | } | |
655 | ||
656 | #ifndef USE_INTS | |
657 | while (!(uart->utx.w & UTX_TX_AVAIL)) udelay(5); | |
658 | } | |
659 | #endif | |
727dda80 | 660 | local_irq_restore(flags); |
1da177e4 LT |
661 | } |
662 | ||
663 | extern void console_printn(const char * b, int count); | |
664 | ||
665 | static int rs_write(struct tty_struct * tty, | |
666 | const unsigned char *buf, int count) | |
667 | { | |
668 | int c, total = 0; | |
669 | struct m68k_serial *info = (struct m68k_serial *)tty->driver_data; | |
670 | m68328_uart *uart = &uart_addr[info->line]; | |
671 | unsigned long flags; | |
672 | ||
673 | if (serial_paranoia_check(info, tty->name, "rs_write")) | |
674 | return 0; | |
675 | ||
676 | if (!tty || !info->xmit_buf) | |
677 | return 0; | |
678 | ||
727dda80 | 679 | local_save_flags(flags); |
1da177e4 | 680 | while (1) { |
727dda80 | 681 | local_irq_disable(); |
1da177e4 LT |
682 | c = min_t(int, count, min(SERIAL_XMIT_SIZE - info->xmit_cnt - 1, |
683 | SERIAL_XMIT_SIZE - info->xmit_head)); | |
727dda80 GU |
684 | local_irq_restore(flags); |
685 | ||
1da177e4 LT |
686 | if (c <= 0) |
687 | break; | |
688 | ||
689 | memcpy(info->xmit_buf + info->xmit_head, buf, c); | |
727dda80 GU |
690 | |
691 | local_irq_disable(); | |
1da177e4 LT |
692 | info->xmit_head = (info->xmit_head + c) & (SERIAL_XMIT_SIZE-1); |
693 | info->xmit_cnt += c; | |
727dda80 | 694 | local_irq_restore(flags); |
1da177e4 LT |
695 | buf += c; |
696 | count -= c; | |
697 | total += c; | |
698 | } | |
699 | ||
700 | if (info->xmit_cnt && !tty->stopped && !tty->hw_stopped) { | |
701 | /* Enable transmitter */ | |
727dda80 | 702 | local_irq_disable(); |
1da177e4 LT |
703 | #ifndef USE_INTS |
704 | while(info->xmit_cnt) { | |
705 | #endif | |
706 | ||
707 | uart->ustcnt |= USTCNT_TXEN; | |
708 | #ifdef USE_INTS | |
709 | uart->ustcnt |= USTCNT_TX_INTR_MASK; | |
710 | #else | |
711 | while (!(uart->utx.w & UTX_TX_AVAIL)) udelay(5); | |
712 | #endif | |
713 | if (uart->utx.w & UTX_TX_AVAIL) { | |
714 | uart->utx.b.txdata = info->xmit_buf[info->xmit_tail++]; | |
715 | info->xmit_tail = info->xmit_tail & (SERIAL_XMIT_SIZE-1); | |
716 | info->xmit_cnt--; | |
717 | } | |
718 | ||
719 | #ifndef USE_INTS | |
720 | } | |
721 | #endif | |
727dda80 | 722 | local_irq_restore(flags); |
1da177e4 | 723 | } |
727dda80 | 724 | |
1da177e4 LT |
725 | return total; |
726 | } | |
727 | ||
728 | static int rs_write_room(struct tty_struct *tty) | |
729 | { | |
730 | struct m68k_serial *info = (struct m68k_serial *)tty->driver_data; | |
731 | int ret; | |
732 | ||
733 | if (serial_paranoia_check(info, tty->name, "rs_write_room")) | |
734 | return 0; | |
735 | ret = SERIAL_XMIT_SIZE - info->xmit_cnt - 1; | |
736 | if (ret < 0) | |
737 | ret = 0; | |
738 | return ret; | |
739 | } | |
740 | ||
741 | static int rs_chars_in_buffer(struct tty_struct *tty) | |
742 | { | |
743 | struct m68k_serial *info = (struct m68k_serial *)tty->driver_data; | |
744 | ||
745 | if (serial_paranoia_check(info, tty->name, "rs_chars_in_buffer")) | |
746 | return 0; | |
747 | return info->xmit_cnt; | |
748 | } | |
749 | ||
750 | static void rs_flush_buffer(struct tty_struct *tty) | |
751 | { | |
752 | struct m68k_serial *info = (struct m68k_serial *)tty->driver_data; | |
727dda80 | 753 | unsigned long flags; |
1da177e4 LT |
754 | |
755 | if (serial_paranoia_check(info, tty->name, "rs_flush_buffer")) | |
756 | return; | |
727dda80 | 757 | local_irq_save(flags); |
1da177e4 | 758 | info->xmit_cnt = info->xmit_head = info->xmit_tail = 0; |
727dda80 | 759 | local_irq_restore(flags); |
1da177e4 LT |
760 | tty_wakeup(tty); |
761 | } | |
762 | ||
763 | /* | |
764 | * ------------------------------------------------------------ | |
765 | * rs_throttle() | |
766 | * | |
767 | * This routine is called by the upper-layer tty layer to signal that | |
768 | * incoming characters should be throttled. | |
769 | * ------------------------------------------------------------ | |
770 | */ | |
771 | static void rs_throttle(struct tty_struct * tty) | |
772 | { | |
773 | struct m68k_serial *info = (struct m68k_serial *)tty->driver_data; | |
774 | ||
775 | if (serial_paranoia_check(info, tty->name, "rs_throttle")) | |
776 | return; | |
777 | ||
778 | if (I_IXOFF(tty)) | |
779 | info->x_char = STOP_CHAR(tty); | |
780 | ||
781 | /* Turn off RTS line (do this atomic) */ | |
782 | } | |
783 | ||
784 | static void rs_unthrottle(struct tty_struct * tty) | |
785 | { | |
786 | struct m68k_serial *info = (struct m68k_serial *)tty->driver_data; | |
787 | ||
788 | if (serial_paranoia_check(info, tty->name, "rs_unthrottle")) | |
789 | return; | |
790 | ||
791 | if (I_IXOFF(tty)) { | |
792 | if (info->x_char) | |
793 | info->x_char = 0; | |
794 | else | |
795 | info->x_char = START_CHAR(tty); | |
796 | } | |
797 | ||
798 | /* Assert RTS line (do this atomic) */ | |
799 | } | |
800 | ||
801 | /* | |
802 | * ------------------------------------------------------------ | |
803 | * rs_ioctl() and friends | |
804 | * ------------------------------------------------------------ | |
805 | */ | |
806 | ||
807 | static int get_serial_info(struct m68k_serial * info, | |
808 | struct serial_struct * retinfo) | |
809 | { | |
810 | struct serial_struct tmp; | |
811 | ||
812 | if (!retinfo) | |
813 | return -EFAULT; | |
814 | memset(&tmp, 0, sizeof(tmp)); | |
815 | tmp.type = info->type; | |
816 | tmp.line = info->line; | |
817 | tmp.port = info->port; | |
818 | tmp.irq = info->irq; | |
a85dd82c | 819 | tmp.flags = info->tport.flags; |
1da177e4 | 820 | tmp.baud_base = info->baud_base; |
4a85b1fc JS |
821 | tmp.close_delay = info->tport.close_delay; |
822 | tmp.closing_wait = info->tport.closing_wait; | |
1da177e4 | 823 | tmp.custom_divisor = info->custom_divisor; |
5d56356a KV |
824 | if (copy_to_user(retinfo, &tmp, sizeof(*retinfo))) |
825 | return -EFAULT; | |
826 | ||
1da177e4 LT |
827 | return 0; |
828 | } | |
829 | ||
467712c9 | 830 | static int set_serial_info(struct m68k_serial *info, struct tty_struct *tty, |
1da177e4 LT |
831 | struct serial_struct * new_info) |
832 | { | |
4a85b1fc | 833 | struct tty_port *port = &info->tport; |
1da177e4 LT |
834 | struct serial_struct new_serial; |
835 | struct m68k_serial old_info; | |
836 | int retval = 0; | |
837 | ||
838 | if (!new_info) | |
839 | return -EFAULT; | |
5d56356a KV |
840 | if (copy_from_user(&new_serial, new_info, sizeof(new_serial))) |
841 | return -EFAULT; | |
1da177e4 LT |
842 | old_info = *info; |
843 | ||
844 | if (!capable(CAP_SYS_ADMIN)) { | |
845 | if ((new_serial.baud_base != info->baud_base) || | |
846 | (new_serial.type != info->type) || | |
4a85b1fc | 847 | (new_serial.close_delay != port->close_delay) || |
cea4b2ce | 848 | ((new_serial.flags & ~ASYNC_USR_MASK) != |
a85dd82c | 849 | (port->flags & ~ASYNC_USR_MASK))) |
1da177e4 | 850 | return -EPERM; |
a85dd82c | 851 | port->flags = ((port->flags & ~ASYNC_USR_MASK) | |
cea4b2ce | 852 | (new_serial.flags & ASYNC_USR_MASK)); |
1da177e4 LT |
853 | info->custom_divisor = new_serial.custom_divisor; |
854 | goto check_and_exit; | |
855 | } | |
856 | ||
4a85b1fc | 857 | if (port->count > 1) |
1da177e4 LT |
858 | return -EBUSY; |
859 | ||
860 | /* | |
861 | * OK, past this point, all the error checking has been done. | |
862 | * At this point, we start making changes..... | |
863 | */ | |
864 | ||
865 | info->baud_base = new_serial.baud_base; | |
a85dd82c | 866 | port->flags = ((port->flags & ~ASYNC_FLAGS) | |
cea4b2ce | 867 | (new_serial.flags & ASYNC_FLAGS)); |
1da177e4 | 868 | info->type = new_serial.type; |
4a85b1fc JS |
869 | port->close_delay = new_serial.close_delay; |
870 | port->closing_wait = new_serial.closing_wait; | |
1da177e4 LT |
871 | |
872 | check_and_exit: | |
467712c9 | 873 | retval = startup(info, tty); |
1da177e4 LT |
874 | return retval; |
875 | } | |
876 | ||
877 | /* | |
878 | * get_lsr_info - get line status register info | |
879 | * | |
880 | * Purpose: Let user call ioctl() to get info when the UART physically | |
881 | * is emptied. On bus types like RS485, the transmitter must | |
882 | * release the bus after transmitting. This must be done when | |
883 | * the transmit shift register is empty, not be done when the | |
884 | * transmit holding register is empty. This functionality | |
885 | * allows an RS485 driver to be written in user space. | |
886 | */ | |
887 | static int get_lsr_info(struct m68k_serial * info, unsigned int *value) | |
888 | { | |
889 | #ifdef CONFIG_SERIAL_68328_RTS_CTS | |
890 | m68328_uart *uart = &uart_addr[info->line]; | |
891 | #endif | |
892 | unsigned char status; | |
727dda80 | 893 | unsigned long flags; |
1da177e4 | 894 | |
727dda80 | 895 | local_irq_save(flags); |
1da177e4 LT |
896 | #ifdef CONFIG_SERIAL_68328_RTS_CTS |
897 | status = (uart->utx.w & UTX_CTS_STAT) ? 1 : 0; | |
898 | #else | |
899 | status = 0; | |
900 | #endif | |
727dda80 | 901 | local_irq_restore(flags); |
5d56356a | 902 | return put_user(status, value); |
1da177e4 LT |
903 | } |
904 | ||
905 | /* | |
906 | * This routine sends a break character out the serial port. | |
907 | */ | |
6a72c7ba | 908 | static void send_break(struct m68k_serial * info, unsigned int duration) |
1da177e4 LT |
909 | { |
910 | m68328_uart *uart = &uart_addr[info->line]; | |
911 | unsigned long flags; | |
912 | if (!info->port) | |
913 | return; | |
727dda80 | 914 | local_irq_save(flags); |
1da177e4 LT |
915 | #ifdef USE_INTS |
916 | uart->utx.w |= UTX_SEND_BREAK; | |
6a72c7ba | 917 | msleep_interruptible(duration); |
1da177e4 LT |
918 | uart->utx.w &= ~UTX_SEND_BREAK; |
919 | #endif | |
727dda80 | 920 | local_irq_restore(flags); |
1da177e4 LT |
921 | } |
922 | ||
6caa76b7 | 923 | static int rs_ioctl(struct tty_struct *tty, |
1da177e4 LT |
924 | unsigned int cmd, unsigned long arg) |
925 | { | |
1da177e4 LT |
926 | struct m68k_serial * info = (struct m68k_serial *)tty->driver_data; |
927 | int retval; | |
928 | ||
929 | if (serial_paranoia_check(info, tty->name, "rs_ioctl")) | |
930 | return -ENODEV; | |
931 | ||
932 | if ((cmd != TIOCGSERIAL) && (cmd != TIOCSSERIAL) && | |
933 | (cmd != TIOCSERCONFIG) && (cmd != TIOCSERGWILD) && | |
934 | (cmd != TIOCSERSWILD) && (cmd != TIOCSERGSTRUCT)) { | |
935 | if (tty->flags & (1 << TTY_IO_ERROR)) | |
936 | return -EIO; | |
937 | } | |
938 | ||
939 | switch (cmd) { | |
940 | case TCSBRK: /* SVID version: non-zero arg --> no break */ | |
941 | retval = tty_check_change(tty); | |
942 | if (retval) | |
943 | return retval; | |
944 | tty_wait_until_sent(tty, 0); | |
945 | if (!arg) | |
6a72c7ba | 946 | send_break(info, 250); /* 1/4 second */ |
1da177e4 LT |
947 | return 0; |
948 | case TCSBRKP: /* support for POSIX tcsendbreak() */ | |
949 | retval = tty_check_change(tty); | |
950 | if (retval) | |
951 | return retval; | |
952 | tty_wait_until_sent(tty, 0); | |
6a72c7ba | 953 | send_break(info, arg ? arg*(100) : 250); |
1da177e4 | 954 | return 0; |
1da177e4 | 955 | case TIOCGSERIAL: |
5d56356a KV |
956 | return get_serial_info(info, |
957 | (struct serial_struct *) arg); | |
1da177e4 | 958 | case TIOCSSERIAL: |
467712c9 | 959 | return set_serial_info(info, tty, |
1da177e4 LT |
960 | (struct serial_struct *) arg); |
961 | case TIOCSERGETLSR: /* Get line status register */ | |
5d56356a | 962 | return get_lsr_info(info, (unsigned int *) arg); |
1da177e4 | 963 | case TIOCSERGSTRUCT: |
5d56356a KV |
964 | if (copy_to_user((struct m68k_serial *) arg, |
965 | info, sizeof(struct m68k_serial))) | |
1da177e4 | 966 | return -EFAULT; |
1da177e4 | 967 | return 0; |
1da177e4 LT |
968 | default: |
969 | return -ENOIOCTLCMD; | |
970 | } | |
971 | return 0; | |
972 | } | |
973 | ||
606d099c | 974 | static void rs_set_termios(struct tty_struct *tty, struct ktermios *old_termios) |
1da177e4 LT |
975 | { |
976 | struct m68k_serial *info = (struct m68k_serial *)tty->driver_data; | |
977 | ||
467712c9 | 978 | change_speed(info, tty); |
1da177e4 LT |
979 | |
980 | if ((old_termios->c_cflag & CRTSCTS) && | |
3dd332c5 | 981 | !(tty->termios.c_cflag & CRTSCTS)) { |
1da177e4 LT |
982 | tty->hw_stopped = 0; |
983 | rs_start(tty); | |
984 | } | |
985 | ||
986 | } | |
987 | ||
988 | /* | |
989 | * ------------------------------------------------------------ | |
990 | * rs_close() | |
991 | * | |
992 | * This routine is called when the serial port gets closed. First, we | |
993 | * wait for the last remaining data to be sent. Then, we unlink its | |
994 | * S structure from the interrupt chain if necessary, and we free | |
995 | * that IRQ if nothing is left in the chain. | |
996 | * ------------------------------------------------------------ | |
997 | */ | |
998 | static void rs_close(struct tty_struct *tty, struct file * filp) | |
999 | { | |
1000 | struct m68k_serial * info = (struct m68k_serial *)tty->driver_data; | |
86264341 | 1001 | struct tty_port *port = &info->tport; |
1da177e4 LT |
1002 | m68328_uart *uart = &uart_addr[info->line]; |
1003 | unsigned long flags; | |
1004 | ||
9ef20d52 | 1005 | if (serial_paranoia_check(info, tty->name, "rs_close")) |
1da177e4 LT |
1006 | return; |
1007 | ||
727dda80 | 1008 | local_irq_save(flags); |
1da177e4 LT |
1009 | |
1010 | if (tty_hung_up_p(filp)) { | |
727dda80 | 1011 | local_irq_restore(flags); |
1da177e4 LT |
1012 | return; |
1013 | } | |
1014 | ||
86264341 | 1015 | if ((tty->count == 1) && (port->count != 1)) { |
1da177e4 LT |
1016 | /* |
1017 | * Uh, oh. tty->count is 1, which means that the tty | |
1018 | * structure will be freed. Info->count should always | |
1019 | * be one in these conditions. If it's greater than | |
1020 | * one, we've got real problems, since it means the | |
1021 | * serial port won't be shutdown. | |
1022 | */ | |
1023 | printk("rs_close: bad serial port count; tty->count is 1, " | |
86264341 JS |
1024 | "port->count is %d\n", port->count); |
1025 | port->count = 1; | |
1da177e4 | 1026 | } |
86264341 | 1027 | if (--port->count < 0) { |
1da177e4 | 1028 | printk("rs_close: bad serial port count for ttyS%d: %d\n", |
86264341 JS |
1029 | info->line, port->count); |
1030 | port->count = 0; | |
1da177e4 | 1031 | } |
86264341 | 1032 | if (port->count) { |
727dda80 | 1033 | local_irq_restore(flags); |
1da177e4 LT |
1034 | return; |
1035 | } | |
a85dd82c | 1036 | port->flags |= ASYNC_CLOSING; |
1da177e4 LT |
1037 | /* |
1038 | * Now we wait for the transmit buffer to clear; and we notify | |
1039 | * the line discipline to only process XON/XOFF characters. | |
1040 | */ | |
1041 | tty->closing = 1; | |
4a85b1fc JS |
1042 | if (port->closing_wait != ASYNC_CLOSING_WAIT_NONE) |
1043 | tty_wait_until_sent(tty, port->closing_wait); | |
1da177e4 LT |
1044 | /* |
1045 | * At this point we stop accepting input. To do this, we | |
1046 | * disable the receive line status interrupts, and tell the | |
1047 | * interrupt driver to stop checking the data ready bit in the | |
1048 | * line status register. | |
1049 | */ | |
1050 | ||
1051 | uart->ustcnt &= ~USTCNT_RXEN; | |
1052 | uart->ustcnt &= ~(USTCNT_RXEN | USTCNT_RX_INTR_MASK); | |
1053 | ||
467712c9 | 1054 | shutdown(info, tty); |
978e595f | 1055 | rs_flush_buffer(tty); |
1da177e4 LT |
1056 | |
1057 | tty_ldisc_flush(tty); | |
1058 | tty->closing = 0; | |
665569d0 | 1059 | tty_port_tty_set(&info->tport, NULL); |
1da177e4 LT |
1060 | #warning "This is not and has never been valid so fix it" |
1061 | #if 0 | |
1062 | if (tty->ldisc.num != ldiscs[N_TTY].num) { | |
1063 | if (tty->ldisc.close) | |
1064 | (tty->ldisc.close)(tty); | |
1065 | tty->ldisc = ldiscs[N_TTY]; | |
3dd332c5 | 1066 | tty->termios.c_line = N_TTY; |
1da177e4 LT |
1067 | if (tty->ldisc.open) |
1068 | (tty->ldisc.open)(tty); | |
1069 | } | |
1070 | #endif | |
86264341 | 1071 | if (port->blocked_open) { |
4a85b1fc JS |
1072 | if (port->close_delay) |
1073 | msleep_interruptible(jiffies_to_msecs(port->close_delay)); | |
c26f0115 | 1074 | wake_up_interruptible(&port->open_wait); |
1da177e4 | 1075 | } |
a85dd82c | 1076 | port->flags &= ~(ASYNC_NORMAL_ACTIVE|ASYNC_CLOSING); |
c26f0115 | 1077 | wake_up_interruptible(&port->close_wait); |
727dda80 | 1078 | local_irq_restore(flags); |
1da177e4 LT |
1079 | } |
1080 | ||
1081 | /* | |
1082 | * rs_hangup() --- called by tty_hangup() when a hangup is signaled. | |
1083 | */ | |
1084 | void rs_hangup(struct tty_struct *tty) | |
1085 | { | |
1086 | struct m68k_serial * info = (struct m68k_serial *)tty->driver_data; | |
1087 | ||
1088 | if (serial_paranoia_check(info, tty->name, "rs_hangup")) | |
1089 | return; | |
1090 | ||
1091 | rs_flush_buffer(tty); | |
467712c9 | 1092 | shutdown(info, tty); |
86264341 | 1093 | info->tport.count = 0; |
a85dd82c | 1094 | info->tport.flags &= ~ASYNC_NORMAL_ACTIVE; |
665569d0 | 1095 | tty_port_tty_set(&info->tport, NULL); |
c26f0115 | 1096 | wake_up_interruptible(&info->tport.open_wait); |
1da177e4 LT |
1097 | } |
1098 | ||
1da177e4 LT |
1099 | /* |
1100 | * This routine is called whenever a serial port is opened. It | |
1101 | * enables interrupts for a serial port, linking in its S structure into | |
1102 | * the IRQ chain. It also performs the serial-specific | |
1103 | * initialization for the tty structure. | |
1104 | */ | |
1105 | int rs_open(struct tty_struct *tty, struct file * filp) | |
1106 | { | |
1107 | struct m68k_serial *info; | |
410235fd | 1108 | int retval; |
1da177e4 | 1109 | |
410235fd | 1110 | info = &m68k_soft[tty->index]; |
1da177e4 LT |
1111 | |
1112 | if (serial_paranoia_check(info, tty->name, "rs_open")) | |
1113 | return -ENODEV; | |
1114 | ||
86264341 | 1115 | info->tport.count++; |
1da177e4 | 1116 | tty->driver_data = info; |
665569d0 | 1117 | tty_port_tty_set(&info->tport, tty); |
1da177e4 LT |
1118 | |
1119 | /* | |
1120 | * Start up serial port | |
1121 | */ | |
467712c9 | 1122 | retval = startup(info, tty); |
1da177e4 LT |
1123 | if (retval) |
1124 | return retval; | |
1125 | ||
8e328416 | 1126 | return tty_port_block_til_ready(&info->tport, tty, filp); |
1da177e4 LT |
1127 | } |
1128 | ||
1129 | /* Finally, routines used to initialize the serial driver. */ | |
1130 | ||
1131 | static void show_serial_version(void) | |
1132 | { | |
1133 | printk("MC68328 serial driver version 1.00\n"); | |
1134 | } | |
1135 | ||
b68e31d0 | 1136 | static const struct tty_operations rs_ops = { |
1da177e4 LT |
1137 | .open = rs_open, |
1138 | .close = rs_close, | |
1139 | .write = rs_write, | |
1140 | .flush_chars = rs_flush_chars, | |
1141 | .write_room = rs_write_room, | |
1142 | .chars_in_buffer = rs_chars_in_buffer, | |
1143 | .flush_buffer = rs_flush_buffer, | |
1144 | .ioctl = rs_ioctl, | |
1145 | .throttle = rs_throttle, | |
1146 | .unthrottle = rs_unthrottle, | |
1147 | .set_termios = rs_set_termios, | |
1148 | .stop = rs_stop, | |
1149 | .start = rs_start, | |
1150 | .hangup = rs_hangup, | |
1151 | .set_ldisc = rs_set_ldisc, | |
1152 | }; | |
1153 | ||
8e328416 JS |
1154 | static const struct tty_port_operations rs_port_ops = { |
1155 | }; | |
1156 | ||
1da177e4 LT |
1157 | /* rs_init inits the driver */ |
1158 | static int __init | |
1159 | rs68328_init(void) | |
1160 | { | |
107afb7a JS |
1161 | unsigned long flags; |
1162 | int i; | |
1da177e4 LT |
1163 | struct m68k_serial *info; |
1164 | ||
1165 | serial_driver = alloc_tty_driver(NR_PORTS); | |
1166 | if (!serial_driver) | |
1167 | return -ENOMEM; | |
1168 | ||
1169 | show_serial_version(); | |
1170 | ||
1171 | /* Initialize the tty_driver structure */ | |
1172 | /* SPARC: Not all of this is exactly right for us. */ | |
1173 | ||
1174 | serial_driver->name = "ttyS"; | |
1175 | serial_driver->major = TTY_MAJOR; | |
1176 | serial_driver->minor_start = 64; | |
1177 | serial_driver->type = TTY_DRIVER_TYPE_SERIAL; | |
1178 | serial_driver->subtype = SERIAL_TYPE_NORMAL; | |
1179 | serial_driver->init_termios = tty_std_termios; | |
1180 | serial_driver->init_termios.c_cflag = | |
1181 | m68328_console_cbaud | CS8 | CREAD | HUPCL | CLOCAL; | |
1182 | serial_driver->flags = TTY_DRIVER_REAL_RAW; | |
1183 | tty_set_operations(serial_driver, &rs_ops); | |
1184 | ||
727dda80 | 1185 | local_irq_save(flags); |
1da177e4 LT |
1186 | |
1187 | for(i=0;i<NR_PORTS;i++) { | |
1188 | ||
1189 | info = &m68k_soft[i]; | |
86264341 | 1190 | tty_port_init(&info->tport); |
8e328416 | 1191 | info->tport.ops = &rs_port_ops; |
1da177e4 LT |
1192 | info->magic = SERIAL_MAGIC; |
1193 | info->port = (int) &uart_addr[i]; | |
1da177e4 LT |
1194 | info->irq = uart_irqs[i]; |
1195 | info->custom_divisor = 16; | |
1da177e4 | 1196 | info->x_char = 0; |
1da177e4 LT |
1197 | info->line = i; |
1198 | info->is_cons = 1; /* Means shortcuts work */ | |
1199 | ||
1200 | printk("%s%d at 0x%08x (irq = %d)", serial_driver->name, info->line, | |
1201 | info->port, info->irq); | |
1202 | printk(" is a builtin MC68328 UART\n"); | |
1203 | ||
1da177e4 LT |
1204 | #ifdef CONFIG_M68VZ328 |
1205 | if (i > 0 ) | |
1206 | PJSEL &= 0xCF; /* PSW enable second port output */ | |
1207 | #endif | |
1208 | ||
1209 | if (request_irq(uart_irqs[i], | |
1210 | rs_interrupt, | |
9cfb5c05 | 1211 | 0, |
25db8ad5 | 1212 | "M68328_UART", info)) |
1da177e4 | 1213 | panic("Unable to attach 68328 serial interrupt\n"); |
b19e2ca7 JS |
1214 | |
1215 | tty_port_link_device(&info->tport, serial_driver, i); | |
1da177e4 | 1216 | } |
727dda80 | 1217 | local_irq_restore(flags); |
b19e2ca7 JS |
1218 | |
1219 | if (tty_register_driver(serial_driver)) { | |
1220 | put_tty_driver(serial_driver); | |
191c5f10 JS |
1221 | for (i = 0; i < NR_PORTS; i++) |
1222 | tty_port_destroy(&m68k_soft[i].tport); | |
b19e2ca7 JS |
1223 | printk(KERN_ERR "Couldn't register serial driver\n"); |
1224 | return -ENOMEM; | |
1225 | } | |
1226 | ||
1da177e4 LT |
1227 | return 0; |
1228 | } | |
1229 | ||
1da177e4 LT |
1230 | module_init(rs68328_init); |
1231 | ||
1232 | ||
1233 | ||
1234 | static void m68328_set_baud(void) | |
1235 | { | |
1236 | unsigned short ustcnt; | |
1237 | int i; | |
1238 | ||
1239 | ustcnt = USTCNT; | |
1240 | USTCNT = ustcnt & ~USTCNT_TXEN; | |
1241 | ||
1242 | again: | |
8b505ca8 | 1243 | for (i = 0; i < ARRAY_SIZE(baud_table); i++) |
1da177e4 LT |
1244 | if (baud_table[i] == m68328_console_baud) |
1245 | break; | |
8b505ca8 | 1246 | if (i >= ARRAY_SIZE(baud_table)) { |
1da177e4 LT |
1247 | m68328_console_baud = 9600; |
1248 | goto again; | |
1249 | } | |
1250 | ||
1251 | UBAUD = PUT_FIELD(UBAUD_DIVIDE, hw_baud_table[i].divisor) | | |
1252 | PUT_FIELD(UBAUD_PRESCALER, hw_baud_table[i].prescale); | |
1253 | ustcnt &= ~(USTCNT_PARITYEN | USTCNT_ODD_EVEN | USTCNT_STOP | USTCNT_8_7); | |
1254 | ustcnt |= USTCNT_8_7; | |
1255 | ustcnt |= USTCNT_TXEN; | |
1256 | USTCNT = ustcnt; | |
1257 | m68328_console_initted = 1; | |
1258 | return; | |
1259 | } | |
1260 | ||
1261 | ||
1262 | int m68328_console_setup(struct console *cp, char *arg) | |
1263 | { | |
1264 | int i, n = CONSOLE_BAUD_RATE; | |
1265 | ||
1266 | if (!cp) | |
1267 | return(-1); | |
1268 | ||
1269 | if (arg) | |
1270 | n = simple_strtoul(arg,NULL,0); | |
1271 | ||
8b505ca8 | 1272 | for (i = 0; i < ARRAY_SIZE(baud_table); i++) |
1da177e4 LT |
1273 | if (baud_table[i] == n) |
1274 | break; | |
e9a137cb | 1275 | if (i < ARRAY_SIZE(baud_table)) { |
1da177e4 LT |
1276 | m68328_console_baud = n; |
1277 | m68328_console_cbaud = 0; | |
1278 | if (i > 15) { | |
1279 | m68328_console_cbaud |= CBAUDEX; | |
1280 | i -= 15; | |
1281 | } | |
1282 | m68328_console_cbaud |= i; | |
1283 | } | |
1284 | ||
1285 | m68328_set_baud(); /* make sure baud rate changes */ | |
1286 | return(0); | |
1287 | } | |
1288 | ||
1289 | ||
1290 | static struct tty_driver *m68328_console_device(struct console *c, int *index) | |
1291 | { | |
1292 | *index = c->index; | |
1293 | return serial_driver; | |
1294 | } | |
1295 | ||
1296 | ||
1297 | void m68328_console_write (struct console *co, const char *str, | |
1298 | unsigned int count) | |
1299 | { | |
1300 | if (!m68328_console_initted) | |
1301 | m68328_set_baud(); | |
1302 | while (count--) { | |
1303 | if (*str == '\n') | |
1304 | rs_put_char('\r'); | |
1305 | rs_put_char( *str++ ); | |
1306 | } | |
1307 | } | |
1308 | ||
1309 | ||
1310 | static struct console m68328_driver = { | |
1311 | .name = "ttyS", | |
1312 | .write = m68328_console_write, | |
1313 | .device = m68328_console_device, | |
1314 | .setup = m68328_console_setup, | |
1315 | .flags = CON_PRINTBUFFER, | |
1316 | .index = -1, | |
1317 | }; | |
1318 | ||
1319 | ||
1320 | static int __init m68328_console_init(void) | |
1321 | { | |
1322 | register_console(&m68328_driver); | |
1323 | return 0; | |
1324 | } | |
1325 | ||
1326 | console_initcall(m68328_console_init); |