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Commit | Line | Data |
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36764631 | 1 | /* sunzilog.c: Zilog serial driver for Sparc systems. |
1da177e4 LT |
2 | * |
3 | * Driver for Zilog serial chips found on Sun workstations and | |
4 | * servers. This driver could actually be made more generic. | |
5 | * | |
6 | * This is based on the old drivers/sbus/char/zs.c code. A lot | |
7 | * of code has been simply moved over directly from there but | |
8 | * much has been rewritten. Credits therefore go out to Eddie | |
9 | * C. Dost, Pete Zaitcev, Ted Ts'o and Alex Buell for their | |
10 | * work there. | |
11 | * | |
f3c681c0 | 12 | * Copyright (C) 2002, 2006, 2007 David S. Miller (davem@davemloft.net) |
1da177e4 LT |
13 | */ |
14 | ||
1da177e4 LT |
15 | #include <linux/module.h> |
16 | #include <linux/kernel.h> | |
1da177e4 LT |
17 | #include <linux/errno.h> |
18 | #include <linux/delay.h> | |
19 | #include <linux/tty.h> | |
20 | #include <linux/tty_flip.h> | |
21 | #include <linux/major.h> | |
22 | #include <linux/string.h> | |
23 | #include <linux/ptrace.h> | |
24 | #include <linux/ioport.h> | |
25 | #include <linux/slab.h> | |
26 | #include <linux/circ_buf.h> | |
27 | #include <linux/serial.h> | |
28 | #include <linux/sysrq.h> | |
29 | #include <linux/console.h> | |
30 | #include <linux/spinlock.h> | |
31 | #ifdef CONFIG_SERIO | |
32 | #include <linux/serio.h> | |
33 | #endif | |
34 | #include <linux/init.h> | |
c6ed413d | 35 | #include <linux/of_device.h> |
1da177e4 LT |
36 | |
37 | #include <asm/io.h> | |
38 | #include <asm/irq.h> | |
36764631 | 39 | #include <asm/prom.h> |
d550bbd4 | 40 | #include <asm/setup.h> |
1da177e4 LT |
41 | |
42 | #if defined(CONFIG_SERIAL_SUNZILOG_CONSOLE) && defined(CONFIG_MAGIC_SYSRQ) | |
43 | #define SUPPORT_SYSRQ | |
44 | #endif | |
45 | ||
46 | #include <linux/serial_core.h> | |
6816383a | 47 | #include <linux/sunserialcore.h> |
1da177e4 | 48 | |
1da177e4 LT |
49 | #include "sunzilog.h" |
50 | ||
51 | /* On 32-bit sparcs we need to delay after register accesses | |
52 | * to accommodate sun4 systems, but we do not need to flush writes. | |
53 | * On 64-bit sparc we only need to flush single writes to ensure | |
54 | * completion. | |
55 | */ | |
56 | #ifndef CONFIG_SPARC64 | |
57 | #define ZSDELAY() udelay(5) | |
58 | #define ZSDELAY_LONG() udelay(20) | |
59 | #define ZS_WSYNC(channel) do { } while (0) | |
60 | #else | |
61 | #define ZSDELAY() | |
62 | #define ZSDELAY_LONG() | |
63 | #define ZS_WSYNC(__channel) \ | |
36764631 | 64 | readb(&((__channel)->control)) |
1da177e4 LT |
65 | #endif |
66 | ||
1da177e4 LT |
67 | #define ZS_CLOCK 4915200 /* Zilog input clock rate. */ |
68 | #define ZS_CLOCK_DIVISOR 16 /* Divisor this driver uses. */ | |
69 | ||
70 | /* | |
71 | * We wrap our port structure around the generic uart_port. | |
72 | */ | |
73 | struct uart_sunzilog_port { | |
74 | struct uart_port port; | |
75 | ||
76 | /* IRQ servicing chain. */ | |
77 | struct uart_sunzilog_port *next; | |
78 | ||
79 | /* Current values of Zilog write registers. */ | |
80 | unsigned char curregs[NUM_ZSREGS]; | |
81 | ||
82 | unsigned int flags; | |
83 | #define SUNZILOG_FLAG_CONS_KEYB 0x00000001 | |
84 | #define SUNZILOG_FLAG_CONS_MOUSE 0x00000002 | |
85 | #define SUNZILOG_FLAG_IS_CONS 0x00000004 | |
86 | #define SUNZILOG_FLAG_IS_KGDB 0x00000008 | |
87 | #define SUNZILOG_FLAG_MODEM_STATUS 0x00000010 | |
88 | #define SUNZILOG_FLAG_IS_CHANNEL_A 0x00000020 | |
89 | #define SUNZILOG_FLAG_REGS_HELD 0x00000040 | |
90 | #define SUNZILOG_FLAG_TX_STOPPED 0x00000080 | |
91 | #define SUNZILOG_FLAG_TX_ACTIVE 0x00000100 | |
7cc5c855 MF |
92 | #define SUNZILOG_FLAG_ESCC 0x00000200 |
93 | #define SUNZILOG_FLAG_ISR_HANDLER 0x00000400 | |
1da177e4 LT |
94 | |
95 | unsigned int cflag; | |
96 | ||
97 | unsigned char parity_mask; | |
98 | unsigned char prev_status; | |
99 | ||
100 | #ifdef CONFIG_SERIO | |
36764631 | 101 | struct serio serio; |
1da177e4 LT |
102 | int serio_open; |
103 | #endif | |
104 | }; | |
105 | ||
6d45a1ae JW |
106 | static void sunzilog_putchar(struct uart_port *port, int ch); |
107 | ||
1da177e4 LT |
108 | #define ZILOG_CHANNEL_FROM_PORT(PORT) ((struct zilog_channel __iomem *)((PORT)->membase)) |
109 | #define UART_ZILOG(PORT) ((struct uart_sunzilog_port *)(PORT)) | |
110 | ||
111 | #define ZS_IS_KEYB(UP) ((UP)->flags & SUNZILOG_FLAG_CONS_KEYB) | |
112 | #define ZS_IS_MOUSE(UP) ((UP)->flags & SUNZILOG_FLAG_CONS_MOUSE) | |
113 | #define ZS_IS_CONS(UP) ((UP)->flags & SUNZILOG_FLAG_IS_CONS) | |
114 | #define ZS_IS_KGDB(UP) ((UP)->flags & SUNZILOG_FLAG_IS_KGDB) | |
115 | #define ZS_WANTS_MODEM_STATUS(UP) ((UP)->flags & SUNZILOG_FLAG_MODEM_STATUS) | |
116 | #define ZS_IS_CHANNEL_A(UP) ((UP)->flags & SUNZILOG_FLAG_IS_CHANNEL_A) | |
117 | #define ZS_REGS_HELD(UP) ((UP)->flags & SUNZILOG_FLAG_REGS_HELD) | |
118 | #define ZS_TX_STOPPED(UP) ((UP)->flags & SUNZILOG_FLAG_TX_STOPPED) | |
119 | #define ZS_TX_ACTIVE(UP) ((UP)->flags & SUNZILOG_FLAG_TX_ACTIVE) | |
120 | ||
121 | /* Reading and writing Zilog8530 registers. The delays are to make this | |
122 | * driver work on the Sun4 which needs a settling delay after each chip | |
123 | * register access, other machines handle this in hardware via auxiliary | |
124 | * flip-flops which implement the settle time we do in software. | |
125 | * | |
126 | * The port lock must be held and local IRQs must be disabled | |
127 | * when {read,write}_zsreg is invoked. | |
128 | */ | |
129 | static unsigned char read_zsreg(struct zilog_channel __iomem *channel, | |
130 | unsigned char reg) | |
131 | { | |
132 | unsigned char retval; | |
133 | ||
36764631 | 134 | writeb(reg, &channel->control); |
1da177e4 | 135 | ZSDELAY(); |
36764631 | 136 | retval = readb(&channel->control); |
1da177e4 LT |
137 | ZSDELAY(); |
138 | ||
139 | return retval; | |
140 | } | |
141 | ||
142 | static void write_zsreg(struct zilog_channel __iomem *channel, | |
143 | unsigned char reg, unsigned char value) | |
144 | { | |
36764631 | 145 | writeb(reg, &channel->control); |
1da177e4 | 146 | ZSDELAY(); |
36764631 | 147 | writeb(value, &channel->control); |
1da177e4 LT |
148 | ZSDELAY(); |
149 | } | |
150 | ||
151 | static void sunzilog_clear_fifo(struct zilog_channel __iomem *channel) | |
152 | { | |
153 | int i; | |
154 | ||
155 | for (i = 0; i < 32; i++) { | |
156 | unsigned char regval; | |
157 | ||
36764631 | 158 | regval = readb(&channel->control); |
1da177e4 LT |
159 | ZSDELAY(); |
160 | if (regval & Rx_CH_AV) | |
161 | break; | |
162 | ||
163 | regval = read_zsreg(channel, R1); | |
36764631 | 164 | readb(&channel->data); |
1da177e4 LT |
165 | ZSDELAY(); |
166 | ||
167 | if (regval & (PAR_ERR | Rx_OVR | CRC_ERR)) { | |
36764631 | 168 | writeb(ERR_RES, &channel->control); |
1da177e4 LT |
169 | ZSDELAY(); |
170 | ZS_WSYNC(channel); | |
171 | } | |
172 | } | |
173 | } | |
174 | ||
175 | /* This function must only be called when the TX is not busy. The UART | |
176 | * port lock must be held and local interrupts disabled. | |
177 | */ | |
7cc5c855 | 178 | static int __load_zsregs(struct zilog_channel __iomem *channel, unsigned char *regs) |
1da177e4 LT |
179 | { |
180 | int i; | |
7cc5c855 MF |
181 | int escc; |
182 | unsigned char r15; | |
1da177e4 LT |
183 | |
184 | /* Let pending transmits finish. */ | |
185 | for (i = 0; i < 1000; i++) { | |
186 | unsigned char stat = read_zsreg(channel, R1); | |
187 | if (stat & ALL_SNT) | |
188 | break; | |
189 | udelay(100); | |
190 | } | |
191 | ||
36764631 | 192 | writeb(ERR_RES, &channel->control); |
1da177e4 LT |
193 | ZSDELAY(); |
194 | ZS_WSYNC(channel); | |
195 | ||
196 | sunzilog_clear_fifo(channel); | |
197 | ||
198 | /* Disable all interrupts. */ | |
199 | write_zsreg(channel, R1, | |
200 | regs[R1] & ~(RxINT_MASK | TxINT_ENAB | EXT_INT_ENAB)); | |
201 | ||
202 | /* Set parity, sync config, stop bits, and clock divisor. */ | |
203 | write_zsreg(channel, R4, regs[R4]); | |
204 | ||
205 | /* Set misc. TX/RX control bits. */ | |
206 | write_zsreg(channel, R10, regs[R10]); | |
207 | ||
208 | /* Set TX/RX controls sans the enable bits. */ | |
209 | write_zsreg(channel, R3, regs[R3] & ~RxENAB); | |
210 | write_zsreg(channel, R5, regs[R5] & ~TxENAB); | |
211 | ||
212 | /* Synchronous mode config. */ | |
213 | write_zsreg(channel, R6, regs[R6]); | |
214 | write_zsreg(channel, R7, regs[R7]); | |
215 | ||
216 | /* Don't mess with the interrupt vector (R2, unused by us) and | |
217 | * master interrupt control (R9). We make sure this is setup | |
218 | * properly at probe time then never touch it again. | |
219 | */ | |
220 | ||
221 | /* Disable baud generator. */ | |
222 | write_zsreg(channel, R14, regs[R14] & ~BRENAB); | |
223 | ||
224 | /* Clock mode control. */ | |
225 | write_zsreg(channel, R11, regs[R11]); | |
226 | ||
227 | /* Lower and upper byte of baud rate generator divisor. */ | |
228 | write_zsreg(channel, R12, regs[R12]); | |
229 | write_zsreg(channel, R13, regs[R13]); | |
230 | ||
231 | /* Now rewrite R14, with BRENAB (if set). */ | |
232 | write_zsreg(channel, R14, regs[R14]); | |
233 | ||
234 | /* External status interrupt control. */ | |
7cc5c855 MF |
235 | write_zsreg(channel, R15, (regs[R15] | WR7pEN) & ~FIFOEN); |
236 | ||
237 | /* ESCC Extension Register */ | |
238 | r15 = read_zsreg(channel, R15); | |
239 | if (r15 & 0x01) { | |
240 | write_zsreg(channel, R7, regs[R7p]); | |
241 | ||
242 | /* External status interrupt and FIFO control. */ | |
243 | write_zsreg(channel, R15, regs[R15] & ~WR7pEN); | |
244 | escc = 1; | |
245 | } else { | |
246 | /* Clear FIFO bit case it is an issue */ | |
247 | regs[R15] &= ~FIFOEN; | |
248 | escc = 0; | |
249 | } | |
1da177e4 LT |
250 | |
251 | /* Reset external status interrupts. */ | |
7cc5c855 MF |
252 | write_zsreg(channel, R0, RES_EXT_INT); /* First Latch */ |
253 | write_zsreg(channel, R0, RES_EXT_INT); /* Second Latch */ | |
1da177e4 LT |
254 | |
255 | /* Rewrite R3/R5, this time without enables masked. */ | |
256 | write_zsreg(channel, R3, regs[R3]); | |
257 | write_zsreg(channel, R5, regs[R5]); | |
258 | ||
259 | /* Rewrite R1, this time without IRQ enabled masked. */ | |
260 | write_zsreg(channel, R1, regs[R1]); | |
7cc5c855 MF |
261 | |
262 | return escc; | |
1da177e4 LT |
263 | } |
264 | ||
265 | /* Reprogram the Zilog channel HW registers with the copies found in the | |
266 | * software state struct. If the transmitter is busy, we defer this update | |
267 | * until the next TX complete interrupt. Else, we do it right now. | |
268 | * | |
269 | * The UART port lock must be held and local interrupts disabled. | |
270 | */ | |
271 | static void sunzilog_maybe_update_regs(struct uart_sunzilog_port *up, | |
272 | struct zilog_channel __iomem *channel) | |
273 | { | |
274 | if (!ZS_REGS_HELD(up)) { | |
275 | if (ZS_TX_ACTIVE(up)) { | |
276 | up->flags |= SUNZILOG_FLAG_REGS_HELD; | |
277 | } else { | |
278 | __load_zsregs(channel, up->curregs); | |
279 | } | |
280 | } | |
281 | } | |
282 | ||
283 | static void sunzilog_change_mouse_baud(struct uart_sunzilog_port *up) | |
284 | { | |
285 | unsigned int cur_cflag = up->cflag; | |
286 | int brg, new_baud; | |
287 | ||
288 | up->cflag &= ~CBAUD; | |
289 | up->cflag |= suncore_mouse_baud_cflag_next(cur_cflag, &new_baud); | |
290 | ||
291 | brg = BPS_TO_BRG(new_baud, ZS_CLOCK / ZS_CLOCK_DIVISOR); | |
292 | up->curregs[R12] = (brg & 0xff); | |
293 | up->curregs[R13] = (brg >> 8) & 0xff; | |
294 | sunzilog_maybe_update_regs(up, ZILOG_CHANNEL_FROM_PORT(&up->port)); | |
295 | } | |
296 | ||
297 | static void sunzilog_kbdms_receive_chars(struct uart_sunzilog_port *up, | |
7d12e780 | 298 | unsigned char ch, int is_break) |
1da177e4 LT |
299 | { |
300 | if (ZS_IS_KEYB(up)) { | |
301 | /* Stop-A is handled by drivers/char/keyboard.c now. */ | |
302 | #ifdef CONFIG_SERIO | |
303 | if (up->serio_open) | |
7d12e780 | 304 | serio_interrupt(&up->serio, ch, 0); |
1da177e4 LT |
305 | #endif |
306 | } else if (ZS_IS_MOUSE(up)) { | |
307 | int ret = suncore_mouse_baud_detection(ch, is_break); | |
308 | ||
309 | switch (ret) { | |
310 | case 2: | |
311 | sunzilog_change_mouse_baud(up); | |
312 | /* fallthru */ | |
313 | case 1: | |
314 | break; | |
315 | ||
316 | case 0: | |
317 | #ifdef CONFIG_SERIO | |
318 | if (up->serio_open) | |
7d12e780 | 319 | serio_interrupt(&up->serio, ch, 0); |
1da177e4 LT |
320 | #endif |
321 | break; | |
fc811472 | 322 | } |
1da177e4 LT |
323 | } |
324 | } | |
325 | ||
2e124b4a | 326 | static struct tty_port * |
1da177e4 | 327 | sunzilog_receive_chars(struct uart_sunzilog_port *up, |
7d12e780 | 328 | struct zilog_channel __iomem *channel) |
1da177e4 | 329 | { |
92a19f9c | 330 | struct tty_port *port = NULL; |
33f0f88f | 331 | unsigned char ch, r1, flag; |
1da177e4 | 332 | |
2e124b4a | 333 | if (up->port.state != NULL) /* Unopened serial console */ |
92a19f9c | 334 | port = &up->port.state->port; |
1da177e4 LT |
335 | |
336 | for (;;) { | |
337 | ||
338 | r1 = read_zsreg(channel, R1); | |
339 | if (r1 & (PAR_ERR | Rx_OVR | CRC_ERR)) { | |
36764631 | 340 | writeb(ERR_RES, &channel->control); |
1da177e4 LT |
341 | ZSDELAY(); |
342 | ZS_WSYNC(channel); | |
343 | } | |
344 | ||
36764631 | 345 | ch = readb(&channel->control); |
1da177e4 LT |
346 | ZSDELAY(); |
347 | ||
348 | /* This funny hack depends upon BRK_ABRT not interfering | |
349 | * with the other bits we care about in R1. | |
350 | */ | |
351 | if (ch & BRK_ABRT) | |
352 | r1 |= BRK_ABRT; | |
353 | ||
354 | if (!(ch & Rx_CH_AV)) | |
355 | break; | |
356 | ||
36764631 | 357 | ch = readb(&channel->data); |
1da177e4 LT |
358 | ZSDELAY(); |
359 | ||
360 | ch &= up->parity_mask; | |
361 | ||
362 | if (unlikely(ZS_IS_KEYB(up)) || unlikely(ZS_IS_MOUSE(up))) { | |
7d12e780 | 363 | sunzilog_kbdms_receive_chars(up, ch, 0); |
1da177e4 LT |
364 | continue; |
365 | } | |
366 | ||
1da177e4 | 367 | /* A real serial line, record the character and status. */ |
33f0f88f | 368 | flag = TTY_NORMAL; |
1da177e4 LT |
369 | up->port.icount.rx++; |
370 | if (r1 & (BRK_ABRT | PAR_ERR | Rx_OVR | CRC_ERR)) { | |
371 | if (r1 & BRK_ABRT) { | |
372 | r1 &= ~(PAR_ERR | CRC_ERR); | |
373 | up->port.icount.brk++; | |
374 | if (uart_handle_break(&up->port)) | |
375 | continue; | |
376 | } | |
377 | else if (r1 & PAR_ERR) | |
378 | up->port.icount.parity++; | |
379 | else if (r1 & CRC_ERR) | |
380 | up->port.icount.frame++; | |
381 | if (r1 & Rx_OVR) | |
382 | up->port.icount.overrun++; | |
383 | r1 &= up->port.read_status_mask; | |
384 | if (r1 & BRK_ABRT) | |
33f0f88f | 385 | flag = TTY_BREAK; |
1da177e4 | 386 | else if (r1 & PAR_ERR) |
33f0f88f | 387 | flag = TTY_PARITY; |
1da177e4 | 388 | else if (r1 & CRC_ERR) |
33f0f88f | 389 | flag = TTY_FRAME; |
1da177e4 | 390 | } |
7bbe08d6 | 391 | if (uart_handle_sysrq_char(&up->port, ch) || !port) |
1da177e4 LT |
392 | continue; |
393 | ||
394 | if (up->port.ignore_status_mask == 0xff || | |
395 | (r1 & up->port.ignore_status_mask) == 0) { | |
92a19f9c | 396 | tty_insert_flip_char(port, ch, flag); |
1da177e4 | 397 | } |
33f0f88f | 398 | if (r1 & Rx_OVR) |
92a19f9c | 399 | tty_insert_flip_char(port, 0, TTY_OVERRUN); |
1da177e4 LT |
400 | } |
401 | ||
2e124b4a | 402 | return port; |
1da177e4 LT |
403 | } |
404 | ||
405 | static void sunzilog_status_handle(struct uart_sunzilog_port *up, | |
7d12e780 | 406 | struct zilog_channel __iomem *channel) |
1da177e4 LT |
407 | { |
408 | unsigned char status; | |
409 | ||
36764631 | 410 | status = readb(&channel->control); |
1da177e4 LT |
411 | ZSDELAY(); |
412 | ||
36764631 | 413 | writeb(RES_EXT_INT, &channel->control); |
1da177e4 LT |
414 | ZSDELAY(); |
415 | ZS_WSYNC(channel); | |
416 | ||
417 | if (status & BRK_ABRT) { | |
418 | if (ZS_IS_MOUSE(up)) | |
7d12e780 | 419 | sunzilog_kbdms_receive_chars(up, 0, 1); |
1da177e4 LT |
420 | if (ZS_IS_CONS(up)) { |
421 | /* Wait for BREAK to deassert to avoid potentially | |
422 | * confusing the PROM. | |
423 | */ | |
424 | while (1) { | |
36764631 | 425 | status = readb(&channel->control); |
1da177e4 LT |
426 | ZSDELAY(); |
427 | if (!(status & BRK_ABRT)) | |
428 | break; | |
429 | } | |
430 | sun_do_break(); | |
431 | return; | |
432 | } | |
433 | } | |
434 | ||
435 | if (ZS_WANTS_MODEM_STATUS(up)) { | |
436 | if (status & SYNC) | |
437 | up->port.icount.dsr++; | |
438 | ||
439 | /* The Zilog just gives us an interrupt when DCD/CTS/etc. change. | |
440 | * But it does not tell us which bit has changed, we have to keep | |
441 | * track of this ourselves. | |
442 | */ | |
443 | if ((status ^ up->prev_status) ^ DCD) | |
444 | uart_handle_dcd_change(&up->port, | |
445 | (status & DCD)); | |
446 | if ((status ^ up->prev_status) ^ CTS) | |
447 | uart_handle_cts_change(&up->port, | |
448 | (status & CTS)); | |
449 | ||
bdc04e31 | 450 | wake_up_interruptible(&up->port.state->port.delta_msr_wait); |
1da177e4 LT |
451 | } |
452 | ||
453 | up->prev_status = status; | |
454 | } | |
455 | ||
456 | static void sunzilog_transmit_chars(struct uart_sunzilog_port *up, | |
457 | struct zilog_channel __iomem *channel) | |
458 | { | |
459 | struct circ_buf *xmit; | |
460 | ||
461 | if (ZS_IS_CONS(up)) { | |
36764631 | 462 | unsigned char status = readb(&channel->control); |
1da177e4 LT |
463 | ZSDELAY(); |
464 | ||
465 | /* TX still busy? Just wait for the next TX done interrupt. | |
466 | * | |
467 | * It can occur because of how we do serial console writes. It would | |
468 | * be nice to transmit console writes just like we normally would for | |
469 | * a TTY line. (ie. buffered and TX interrupt driven). That is not | |
470 | * easy because console writes cannot sleep. One solution might be | |
25985edc | 471 | * to poll on enough port->xmit space becoming free. -DaveM |
1da177e4 LT |
472 | */ |
473 | if (!(status & Tx_BUF_EMP)) | |
474 | return; | |
475 | } | |
476 | ||
477 | up->flags &= ~SUNZILOG_FLAG_TX_ACTIVE; | |
478 | ||
479 | if (ZS_REGS_HELD(up)) { | |
480 | __load_zsregs(channel, up->curregs); | |
481 | up->flags &= ~SUNZILOG_FLAG_REGS_HELD; | |
482 | } | |
483 | ||
484 | if (ZS_TX_STOPPED(up)) { | |
485 | up->flags &= ~SUNZILOG_FLAG_TX_STOPPED; | |
486 | goto ack_tx_int; | |
487 | } | |
488 | ||
489 | if (up->port.x_char) { | |
490 | up->flags |= SUNZILOG_FLAG_TX_ACTIVE; | |
36764631 | 491 | writeb(up->port.x_char, &channel->data); |
1da177e4 LT |
492 | ZSDELAY(); |
493 | ZS_WSYNC(channel); | |
494 | ||
495 | up->port.icount.tx++; | |
496 | up->port.x_char = 0; | |
497 | return; | |
498 | } | |
499 | ||
ebd2c8f6 | 500 | if (up->port.state == NULL) |
1da177e4 | 501 | goto ack_tx_int; |
ebd2c8f6 | 502 | xmit = &up->port.state->xmit; |
b8df110f | 503 | if (uart_circ_empty(xmit)) |
1da177e4 | 504 | goto ack_tx_int; |
b8df110f | 505 | |
1da177e4 LT |
506 | if (uart_tx_stopped(&up->port)) |
507 | goto ack_tx_int; | |
508 | ||
509 | up->flags |= SUNZILOG_FLAG_TX_ACTIVE; | |
36764631 | 510 | writeb(xmit->buf[xmit->tail], &channel->data); |
1da177e4 LT |
511 | ZSDELAY(); |
512 | ZS_WSYNC(channel); | |
513 | ||
514 | xmit->tail = (xmit->tail + 1) & (UART_XMIT_SIZE - 1); | |
515 | up->port.icount.tx++; | |
516 | ||
517 | if (uart_circ_chars_pending(xmit) < WAKEUP_CHARS) | |
518 | uart_write_wakeup(&up->port); | |
519 | ||
520 | return; | |
521 | ||
522 | ack_tx_int: | |
36764631 | 523 | writeb(RES_Tx_P, &channel->control); |
1da177e4 LT |
524 | ZSDELAY(); |
525 | ZS_WSYNC(channel); | |
526 | } | |
527 | ||
7d12e780 | 528 | static irqreturn_t sunzilog_interrupt(int irq, void *dev_id) |
1da177e4 LT |
529 | { |
530 | struct uart_sunzilog_port *up = dev_id; | |
531 | ||
532 | while (up) { | |
533 | struct zilog_channel __iomem *channel | |
534 | = ZILOG_CHANNEL_FROM_PORT(&up->port); | |
2e124b4a | 535 | struct tty_port *port; |
1da177e4 LT |
536 | unsigned char r3; |
537 | ||
538 | spin_lock(&up->port.lock); | |
539 | r3 = read_zsreg(channel, R3); | |
540 | ||
541 | /* Channel A */ | |
2e124b4a | 542 | port = NULL; |
1da177e4 | 543 | if (r3 & (CHAEXT | CHATxIP | CHARxIP)) { |
36764631 | 544 | writeb(RES_H_IUS, &channel->control); |
1da177e4 LT |
545 | ZSDELAY(); |
546 | ZS_WSYNC(channel); | |
547 | ||
548 | if (r3 & CHARxIP) | |
2e124b4a | 549 | port = sunzilog_receive_chars(up, channel); |
1da177e4 | 550 | if (r3 & CHAEXT) |
7d12e780 | 551 | sunzilog_status_handle(up, channel); |
1da177e4 LT |
552 | if (r3 & CHATxIP) |
553 | sunzilog_transmit_chars(up, channel); | |
554 | } | |
555 | spin_unlock(&up->port.lock); | |
556 | ||
2e124b4a JS |
557 | if (port) |
558 | tty_flip_buffer_push(port); | |
1da177e4 LT |
559 | |
560 | /* Channel B */ | |
561 | up = up->next; | |
562 | channel = ZILOG_CHANNEL_FROM_PORT(&up->port); | |
563 | ||
564 | spin_lock(&up->port.lock); | |
2e124b4a | 565 | port = NULL; |
1da177e4 | 566 | if (r3 & (CHBEXT | CHBTxIP | CHBRxIP)) { |
36764631 | 567 | writeb(RES_H_IUS, &channel->control); |
1da177e4 LT |
568 | ZSDELAY(); |
569 | ZS_WSYNC(channel); | |
570 | ||
571 | if (r3 & CHBRxIP) | |
2e124b4a | 572 | port = sunzilog_receive_chars(up, channel); |
1da177e4 | 573 | if (r3 & CHBEXT) |
7d12e780 | 574 | sunzilog_status_handle(up, channel); |
1da177e4 LT |
575 | if (r3 & CHBTxIP) |
576 | sunzilog_transmit_chars(up, channel); | |
577 | } | |
578 | spin_unlock(&up->port.lock); | |
579 | ||
2e124b4a JS |
580 | if (port) |
581 | tty_flip_buffer_push(port); | |
1da177e4 LT |
582 | |
583 | up = up->next; | |
584 | } | |
585 | ||
586 | return IRQ_HANDLED; | |
587 | } | |
588 | ||
589 | /* A convenient way to quickly get R0 status. The caller must _not_ hold the | |
590 | * port lock, it is acquired here. | |
591 | */ | |
592 | static __inline__ unsigned char sunzilog_read_channel_status(struct uart_port *port) | |
593 | { | |
594 | struct zilog_channel __iomem *channel; | |
1da177e4 LT |
595 | unsigned char status; |
596 | ||
1da177e4 | 597 | channel = ZILOG_CHANNEL_FROM_PORT(port); |
36764631 | 598 | status = readb(&channel->control); |
1da177e4 LT |
599 | ZSDELAY(); |
600 | ||
1da177e4 LT |
601 | return status; |
602 | } | |
603 | ||
604 | /* The port lock is not held. */ | |
605 | static unsigned int sunzilog_tx_empty(struct uart_port *port) | |
606 | { | |
c5f4644e | 607 | unsigned long flags; |
1da177e4 LT |
608 | unsigned char status; |
609 | unsigned int ret; | |
610 | ||
c5f4644e RK |
611 | spin_lock_irqsave(&port->lock, flags); |
612 | ||
1da177e4 | 613 | status = sunzilog_read_channel_status(port); |
c5f4644e RK |
614 | |
615 | spin_unlock_irqrestore(&port->lock, flags); | |
616 | ||
1da177e4 LT |
617 | if (status & Tx_BUF_EMP) |
618 | ret = TIOCSER_TEMT; | |
619 | else | |
620 | ret = 0; | |
621 | ||
622 | return ret; | |
623 | } | |
624 | ||
c5f4644e | 625 | /* The port lock is held and interrupts are disabled. */ |
1da177e4 LT |
626 | static unsigned int sunzilog_get_mctrl(struct uart_port *port) |
627 | { | |
628 | unsigned char status; | |
629 | unsigned int ret; | |
630 | ||
631 | status = sunzilog_read_channel_status(port); | |
632 | ||
633 | ret = 0; | |
634 | if (status & DCD) | |
635 | ret |= TIOCM_CAR; | |
636 | if (status & SYNC) | |
637 | ret |= TIOCM_DSR; | |
638 | if (status & CTS) | |
639 | ret |= TIOCM_CTS; | |
640 | ||
641 | return ret; | |
642 | } | |
643 | ||
644 | /* The port lock is held and interrupts are disabled. */ | |
645 | static void sunzilog_set_mctrl(struct uart_port *port, unsigned int mctrl) | |
646 | { | |
6f414130 FF |
647 | struct uart_sunzilog_port *up = |
648 | container_of(port, struct uart_sunzilog_port, port); | |
1da177e4 LT |
649 | struct zilog_channel __iomem *channel = ZILOG_CHANNEL_FROM_PORT(port); |
650 | unsigned char set_bits, clear_bits; | |
651 | ||
652 | set_bits = clear_bits = 0; | |
653 | ||
654 | if (mctrl & TIOCM_RTS) | |
655 | set_bits |= RTS; | |
656 | else | |
657 | clear_bits |= RTS; | |
658 | if (mctrl & TIOCM_DTR) | |
659 | set_bits |= DTR; | |
660 | else | |
661 | clear_bits |= DTR; | |
662 | ||
663 | /* NOTE: Not subject to 'transmitter active' rule. */ | |
664 | up->curregs[R5] |= set_bits; | |
665 | up->curregs[R5] &= ~clear_bits; | |
666 | write_zsreg(channel, R5, up->curregs[R5]); | |
667 | } | |
668 | ||
669 | /* The port lock is held and interrupts are disabled. */ | |
b129a8cc | 670 | static void sunzilog_stop_tx(struct uart_port *port) |
1da177e4 | 671 | { |
6f414130 FF |
672 | struct uart_sunzilog_port *up = |
673 | container_of(port, struct uart_sunzilog_port, port); | |
1da177e4 LT |
674 | |
675 | up->flags |= SUNZILOG_FLAG_TX_STOPPED; | |
676 | } | |
677 | ||
678 | /* The port lock is held and interrupts are disabled. */ | |
b129a8cc | 679 | static void sunzilog_start_tx(struct uart_port *port) |
1da177e4 | 680 | { |
6f414130 FF |
681 | struct uart_sunzilog_port *up = |
682 | container_of(port, struct uart_sunzilog_port, port); | |
1da177e4 LT |
683 | struct zilog_channel __iomem *channel = ZILOG_CHANNEL_FROM_PORT(port); |
684 | unsigned char status; | |
685 | ||
686 | up->flags |= SUNZILOG_FLAG_TX_ACTIVE; | |
687 | up->flags &= ~SUNZILOG_FLAG_TX_STOPPED; | |
688 | ||
36764631 | 689 | status = readb(&channel->control); |
1da177e4 LT |
690 | ZSDELAY(); |
691 | ||
692 | /* TX busy? Just wait for the TX done interrupt. */ | |
693 | if (!(status & Tx_BUF_EMP)) | |
694 | return; | |
695 | ||
696 | /* Send the first character to jump-start the TX done | |
697 | * IRQ sending engine. | |
698 | */ | |
699 | if (port->x_char) { | |
36764631 | 700 | writeb(port->x_char, &channel->data); |
1da177e4 LT |
701 | ZSDELAY(); |
702 | ZS_WSYNC(channel); | |
703 | ||
704 | port->icount.tx++; | |
705 | port->x_char = 0; | |
706 | } else { | |
ebd2c8f6 | 707 | struct circ_buf *xmit = &port->state->xmit; |
1da177e4 | 708 | |
c557d392 PH |
709 | if (uart_circ_empty(xmit)) |
710 | return; | |
36764631 | 711 | writeb(xmit->buf[xmit->tail], &channel->data); |
1da177e4 LT |
712 | ZSDELAY(); |
713 | ZS_WSYNC(channel); | |
714 | ||
715 | xmit->tail = (xmit->tail + 1) & (UART_XMIT_SIZE - 1); | |
716 | port->icount.tx++; | |
717 | ||
718 | if (uart_circ_chars_pending(xmit) < WAKEUP_CHARS) | |
719 | uart_write_wakeup(&up->port); | |
720 | } | |
721 | } | |
722 | ||
723 | /* The port lock is held. */ | |
724 | static void sunzilog_stop_rx(struct uart_port *port) | |
725 | { | |
726 | struct uart_sunzilog_port *up = UART_ZILOG(port); | |
727 | struct zilog_channel __iomem *channel; | |
728 | ||
729 | if (ZS_IS_CONS(up)) | |
730 | return; | |
731 | ||
732 | channel = ZILOG_CHANNEL_FROM_PORT(port); | |
733 | ||
734 | /* Disable all RX interrupts. */ | |
735 | up->curregs[R1] &= ~RxINT_MASK; | |
736 | sunzilog_maybe_update_regs(up, channel); | |
737 | } | |
738 | ||
739 | /* The port lock is held. */ | |
740 | static void sunzilog_enable_ms(struct uart_port *port) | |
741 | { | |
6f414130 FF |
742 | struct uart_sunzilog_port *up = |
743 | container_of(port, struct uart_sunzilog_port, port); | |
1da177e4 LT |
744 | struct zilog_channel __iomem *channel = ZILOG_CHANNEL_FROM_PORT(port); |
745 | unsigned char new_reg; | |
746 | ||
747 | new_reg = up->curregs[R15] | (DCDIE | SYNCIE | CTSIE); | |
748 | if (new_reg != up->curregs[R15]) { | |
749 | up->curregs[R15] = new_reg; | |
750 | ||
751 | /* NOTE: Not subject to 'transmitter active' rule. */ | |
7cc5c855 | 752 | write_zsreg(channel, R15, up->curregs[R15] & ~WR7pEN); |
1da177e4 LT |
753 | } |
754 | } | |
755 | ||
756 | /* The port lock is not held. */ | |
757 | static void sunzilog_break_ctl(struct uart_port *port, int break_state) | |
758 | { | |
6f414130 FF |
759 | struct uart_sunzilog_port *up = |
760 | container_of(port, struct uart_sunzilog_port, port); | |
1da177e4 LT |
761 | struct zilog_channel __iomem *channel = ZILOG_CHANNEL_FROM_PORT(port); |
762 | unsigned char set_bits, clear_bits, new_reg; | |
763 | unsigned long flags; | |
764 | ||
765 | set_bits = clear_bits = 0; | |
766 | ||
767 | if (break_state) | |
768 | set_bits |= SND_BRK; | |
769 | else | |
770 | clear_bits |= SND_BRK; | |
771 | ||
772 | spin_lock_irqsave(&port->lock, flags); | |
773 | ||
774 | new_reg = (up->curregs[R5] | set_bits) & ~clear_bits; | |
775 | if (new_reg != up->curregs[R5]) { | |
776 | up->curregs[R5] = new_reg; | |
777 | ||
778 | /* NOTE: Not subject to 'transmitter active' rule. */ | |
779 | write_zsreg(channel, R5, up->curregs[R5]); | |
780 | } | |
781 | ||
782 | spin_unlock_irqrestore(&port->lock, flags); | |
783 | } | |
784 | ||
785 | static void __sunzilog_startup(struct uart_sunzilog_port *up) | |
786 | { | |
787 | struct zilog_channel __iomem *channel; | |
788 | ||
789 | channel = ZILOG_CHANNEL_FROM_PORT(&up->port); | |
36764631 | 790 | up->prev_status = readb(&channel->control); |
1da177e4 LT |
791 | |
792 | /* Enable receiver and transmitter. */ | |
793 | up->curregs[R3] |= RxENAB; | |
794 | up->curregs[R5] |= TxENAB; | |
795 | ||
796 | up->curregs[R1] |= EXT_INT_ENAB | INT_ALL_Rx | TxINT_ENAB; | |
797 | sunzilog_maybe_update_regs(up, channel); | |
798 | } | |
799 | ||
800 | static int sunzilog_startup(struct uart_port *port) | |
801 | { | |
802 | struct uart_sunzilog_port *up = UART_ZILOG(port); | |
803 | unsigned long flags; | |
804 | ||
805 | if (ZS_IS_CONS(up)) | |
806 | return 0; | |
807 | ||
808 | spin_lock_irqsave(&port->lock, flags); | |
809 | __sunzilog_startup(up); | |
810 | spin_unlock_irqrestore(&port->lock, flags); | |
811 | return 0; | |
812 | } | |
813 | ||
814 | /* | |
815 | * The test for ZS_IS_CONS is explained by the following e-mail: | |
816 | ***** | |
817 | * From: Russell King <rmk@arm.linux.org.uk> | |
818 | * Date: Sun, 8 Dec 2002 10:18:38 +0000 | |
819 | * | |
820 | * On Sun, Dec 08, 2002 at 02:43:36AM -0500, Pete Zaitcev wrote: | |
821 | * > I boot my 2.5 boxes using "console=ttyS0,9600" argument, | |
822 | * > and I noticed that something is not right with reference | |
823 | * > counting in this case. It seems that when the console | |
824 | * > is open by kernel initially, this is not accounted | |
825 | * > as an open, and uart_startup is not called. | |
826 | * | |
827 | * That is correct. We are unable to call uart_startup when the serial | |
828 | * console is initialised because it may need to allocate memory (as | |
829 | * request_irq does) and the memory allocators may not have been | |
830 | * initialised. | |
831 | * | |
832 | * 1. initialise the port into a state where it can send characters in the | |
833 | * console write method. | |
834 | * | |
835 | * 2. don't do the actual hardware shutdown in your shutdown() method (but | |
836 | * do the normal software shutdown - ie, free irqs etc) | |
837 | ***** | |
838 | */ | |
839 | static void sunzilog_shutdown(struct uart_port *port) | |
840 | { | |
841 | struct uart_sunzilog_port *up = UART_ZILOG(port); | |
842 | struct zilog_channel __iomem *channel; | |
843 | unsigned long flags; | |
844 | ||
845 | if (ZS_IS_CONS(up)) | |
846 | return; | |
847 | ||
848 | spin_lock_irqsave(&port->lock, flags); | |
849 | ||
850 | channel = ZILOG_CHANNEL_FROM_PORT(port); | |
851 | ||
852 | /* Disable receiver and transmitter. */ | |
853 | up->curregs[R3] &= ~RxENAB; | |
854 | up->curregs[R5] &= ~TxENAB; | |
855 | ||
856 | /* Disable all interrupts and BRK assertion. */ | |
857 | up->curregs[R1] &= ~(EXT_INT_ENAB | TxINT_ENAB | RxINT_MASK); | |
858 | up->curregs[R5] &= ~SND_BRK; | |
859 | sunzilog_maybe_update_regs(up, channel); | |
860 | ||
861 | spin_unlock_irqrestore(&port->lock, flags); | |
862 | } | |
863 | ||
864 | /* Shared by TTY driver and serial console setup. The port lock is held | |
865 | * and local interrupts are disabled. | |
866 | */ | |
867 | static void | |
868 | sunzilog_convert_to_zs(struct uart_sunzilog_port *up, unsigned int cflag, | |
869 | unsigned int iflag, int brg) | |
870 | { | |
871 | ||
872 | up->curregs[R10] = NRZ; | |
873 | up->curregs[R11] = TCBR | RCBR; | |
874 | ||
875 | /* Program BAUD and clock source. */ | |
876 | up->curregs[R4] &= ~XCLK_MASK; | |
877 | up->curregs[R4] |= X16CLK; | |
878 | up->curregs[R12] = brg & 0xff; | |
879 | up->curregs[R13] = (brg >> 8) & 0xff; | |
880 | up->curregs[R14] = BRSRC | BRENAB; | |
881 | ||
882 | /* Character size, stop bits, and parity. */ | |
7cc5c855 MF |
883 | up->curregs[R3] &= ~RxN_MASK; |
884 | up->curregs[R5] &= ~TxN_MASK; | |
1da177e4 LT |
885 | switch (cflag & CSIZE) { |
886 | case CS5: | |
7cc5c855 MF |
887 | up->curregs[R3] |= Rx5; |
888 | up->curregs[R5] |= Tx5; | |
1da177e4 LT |
889 | up->parity_mask = 0x1f; |
890 | break; | |
891 | case CS6: | |
7cc5c855 MF |
892 | up->curregs[R3] |= Rx6; |
893 | up->curregs[R5] |= Tx6; | |
1da177e4 LT |
894 | up->parity_mask = 0x3f; |
895 | break; | |
896 | case CS7: | |
7cc5c855 MF |
897 | up->curregs[R3] |= Rx7; |
898 | up->curregs[R5] |= Tx7; | |
1da177e4 LT |
899 | up->parity_mask = 0x7f; |
900 | break; | |
901 | case CS8: | |
902 | default: | |
7cc5c855 MF |
903 | up->curregs[R3] |= Rx8; |
904 | up->curregs[R5] |= Tx8; | |
1da177e4 LT |
905 | up->parity_mask = 0xff; |
906 | break; | |
fc811472 | 907 | } |
7cc5c855 | 908 | up->curregs[R4] &= ~0x0c; |
1da177e4 | 909 | if (cflag & CSTOPB) |
7cc5c855 | 910 | up->curregs[R4] |= SB2; |
1da177e4 | 911 | else |
7cc5c855 | 912 | up->curregs[R4] |= SB1; |
1da177e4 | 913 | if (cflag & PARENB) |
7cc5c855 | 914 | up->curregs[R4] |= PAR_ENAB; |
1da177e4 | 915 | else |
7cc5c855 | 916 | up->curregs[R4] &= ~PAR_ENAB; |
1da177e4 | 917 | if (!(cflag & PARODD)) |
7cc5c855 | 918 | up->curregs[R4] |= PAR_EVEN; |
1da177e4 | 919 | else |
7cc5c855 | 920 | up->curregs[R4] &= ~PAR_EVEN; |
1da177e4 LT |
921 | |
922 | up->port.read_status_mask = Rx_OVR; | |
923 | if (iflag & INPCK) | |
924 | up->port.read_status_mask |= CRC_ERR | PAR_ERR; | |
ef8b9ddc | 925 | if (iflag & (IGNBRK | BRKINT | PARMRK)) |
1da177e4 LT |
926 | up->port.read_status_mask |= BRK_ABRT; |
927 | ||
928 | up->port.ignore_status_mask = 0; | |
929 | if (iflag & IGNPAR) | |
930 | up->port.ignore_status_mask |= CRC_ERR | PAR_ERR; | |
931 | if (iflag & IGNBRK) { | |
932 | up->port.ignore_status_mask |= BRK_ABRT; | |
933 | if (iflag & IGNPAR) | |
934 | up->port.ignore_status_mask |= Rx_OVR; | |
935 | } | |
936 | ||
937 | if ((cflag & CREAD) == 0) | |
938 | up->port.ignore_status_mask = 0xff; | |
939 | } | |
940 | ||
941 | /* The port lock is not held. */ | |
942 | static void | |
606d099c AC |
943 | sunzilog_set_termios(struct uart_port *port, struct ktermios *termios, |
944 | struct ktermios *old) | |
1da177e4 | 945 | { |
6f414130 FF |
946 | struct uart_sunzilog_port *up = |
947 | container_of(port, struct uart_sunzilog_port, port); | |
1da177e4 LT |
948 | unsigned long flags; |
949 | int baud, brg; | |
950 | ||
951 | baud = uart_get_baud_rate(port, termios, old, 1200, 76800); | |
952 | ||
953 | spin_lock_irqsave(&up->port.lock, flags); | |
954 | ||
955 | brg = BPS_TO_BRG(baud, ZS_CLOCK / ZS_CLOCK_DIVISOR); | |
956 | ||
957 | sunzilog_convert_to_zs(up, termios->c_cflag, termios->c_iflag, brg); | |
958 | ||
959 | if (UART_ENABLE_MS(&up->port, termios->c_cflag)) | |
960 | up->flags |= SUNZILOG_FLAG_MODEM_STATUS; | |
961 | else | |
962 | up->flags &= ~SUNZILOG_FLAG_MODEM_STATUS; | |
963 | ||
964 | up->cflag = termios->c_cflag; | |
965 | ||
966 | sunzilog_maybe_update_regs(up, ZILOG_CHANNEL_FROM_PORT(port)); | |
967 | ||
968 | uart_update_timeout(port, termios->c_cflag, baud); | |
969 | ||
970 | spin_unlock_irqrestore(&up->port.lock, flags); | |
971 | } | |
972 | ||
973 | static const char *sunzilog_type(struct uart_port *port) | |
974 | { | |
7cc5c855 MF |
975 | struct uart_sunzilog_port *up = UART_ZILOG(port); |
976 | ||
977 | return (up->flags & SUNZILOG_FLAG_ESCC) ? "zs (ESCC)" : "zs"; | |
1da177e4 LT |
978 | } |
979 | ||
980 | /* We do not request/release mappings of the registers here, this | |
981 | * happens at early serial probe time. | |
982 | */ | |
983 | static void sunzilog_release_port(struct uart_port *port) | |
984 | { | |
985 | } | |
986 | ||
987 | static int sunzilog_request_port(struct uart_port *port) | |
988 | { | |
989 | return 0; | |
990 | } | |
991 | ||
992 | /* These do not need to do anything interesting either. */ | |
993 | static void sunzilog_config_port(struct uart_port *port, int flags) | |
994 | { | |
995 | } | |
996 | ||
997 | /* We do not support letting the user mess with the divisor, IRQ, etc. */ | |
998 | static int sunzilog_verify_port(struct uart_port *port, struct serial_struct *ser) | |
999 | { | |
1000 | return -EINVAL; | |
1001 | } | |
1002 | ||
6d45a1ae JW |
1003 | #ifdef CONFIG_CONSOLE_POLL |
1004 | static int sunzilog_get_poll_char(struct uart_port *port) | |
1005 | { | |
1006 | unsigned char ch, r1; | |
6f414130 FF |
1007 | struct uart_sunzilog_port *up = |
1008 | container_of(port, struct uart_sunzilog_port, port); | |
6d45a1ae JW |
1009 | struct zilog_channel __iomem *channel |
1010 | = ZILOG_CHANNEL_FROM_PORT(&up->port); | |
1011 | ||
1012 | ||
1013 | r1 = read_zsreg(channel, R1); | |
1014 | if (r1 & (PAR_ERR | Rx_OVR | CRC_ERR)) { | |
1015 | writeb(ERR_RES, &channel->control); | |
1016 | ZSDELAY(); | |
1017 | ZS_WSYNC(channel); | |
1018 | } | |
1019 | ||
1020 | ch = readb(&channel->control); | |
1021 | ZSDELAY(); | |
1022 | ||
1023 | /* This funny hack depends upon BRK_ABRT not interfering | |
1024 | * with the other bits we care about in R1. | |
1025 | */ | |
1026 | if (ch & BRK_ABRT) | |
1027 | r1 |= BRK_ABRT; | |
1028 | ||
1029 | if (!(ch & Rx_CH_AV)) | |
1030 | return NO_POLL_CHAR; | |
1031 | ||
1032 | ch = readb(&channel->data); | |
1033 | ZSDELAY(); | |
1034 | ||
1035 | ch &= up->parity_mask; | |
1036 | return ch; | |
1037 | } | |
1038 | ||
1039 | static void sunzilog_put_poll_char(struct uart_port *port, | |
1040 | unsigned char ch) | |
1041 | { | |
6f414130 FF |
1042 | struct uart_sunzilog_port *up = |
1043 | container_of(port, struct uart_sunzilog_port, port); | |
6d45a1ae JW |
1044 | |
1045 | sunzilog_putchar(&up->port, ch); | |
1046 | } | |
1047 | #endif /* CONFIG_CONSOLE_POLL */ | |
1048 | ||
1da177e4 LT |
1049 | static struct uart_ops sunzilog_pops = { |
1050 | .tx_empty = sunzilog_tx_empty, | |
1051 | .set_mctrl = sunzilog_set_mctrl, | |
1052 | .get_mctrl = sunzilog_get_mctrl, | |
1053 | .stop_tx = sunzilog_stop_tx, | |
1054 | .start_tx = sunzilog_start_tx, | |
1055 | .stop_rx = sunzilog_stop_rx, | |
1056 | .enable_ms = sunzilog_enable_ms, | |
1057 | .break_ctl = sunzilog_break_ctl, | |
1058 | .startup = sunzilog_startup, | |
1059 | .shutdown = sunzilog_shutdown, | |
1060 | .set_termios = sunzilog_set_termios, | |
1061 | .type = sunzilog_type, | |
1062 | .release_port = sunzilog_release_port, | |
1063 | .request_port = sunzilog_request_port, | |
1064 | .config_port = sunzilog_config_port, | |
1065 | .verify_port = sunzilog_verify_port, | |
6d45a1ae JW |
1066 | #ifdef CONFIG_CONSOLE_POLL |
1067 | .poll_get_char = sunzilog_get_poll_char, | |
1068 | .poll_put_char = sunzilog_put_poll_char, | |
1069 | #endif | |
1da177e4 LT |
1070 | }; |
1071 | ||
227739bf | 1072 | static int uart_chip_count; |
1da177e4 LT |
1073 | static struct uart_sunzilog_port *sunzilog_port_table; |
1074 | static struct zilog_layout __iomem **sunzilog_chip_regs; | |
1075 | ||
1076 | static struct uart_sunzilog_port *sunzilog_irq_chain; | |
1da177e4 LT |
1077 | |
1078 | static struct uart_driver sunzilog_reg = { | |
1079 | .owner = THIS_MODULE, | |
32039f49 | 1080 | .driver_name = "sunzilog", |
1da177e4 LT |
1081 | .dev_name = "ttyS", |
1082 | .major = TTY_MAJOR, | |
1083 | }; | |
1084 | ||
58d784a5 | 1085 | static int __init sunzilog_alloc_tables(int num_sunzilog) |
1da177e4 | 1086 | { |
36764631 DM |
1087 | struct uart_sunzilog_port *up; |
1088 | unsigned long size; | |
58d784a5 | 1089 | int num_channels = num_sunzilog * 2; |
36764631 | 1090 | int i; |
1da177e4 | 1091 | |
58d784a5 | 1092 | size = num_channels * sizeof(struct uart_sunzilog_port); |
36764631 DM |
1093 | sunzilog_port_table = kzalloc(size, GFP_KERNEL); |
1094 | if (!sunzilog_port_table) | |
1095 | return -ENOMEM; | |
1da177e4 | 1096 | |
58d784a5 | 1097 | for (i = 0; i < num_channels; i++) { |
36764631 | 1098 | up = &sunzilog_port_table[i]; |
1da177e4 | 1099 | |
36764631 | 1100 | spin_lock_init(&up->port.lock); |
1da177e4 | 1101 | |
36764631 DM |
1102 | if (i == 0) |
1103 | sunzilog_irq_chain = up; | |
1da177e4 | 1104 | |
58d784a5 | 1105 | if (i < num_channels - 1) |
36764631 DM |
1106 | up->next = up + 1; |
1107 | else | |
1108 | up->next = NULL; | |
1da177e4 LT |
1109 | } |
1110 | ||
58d784a5 | 1111 | size = num_sunzilog * sizeof(struct zilog_layout __iomem *); |
36764631 DM |
1112 | sunzilog_chip_regs = kzalloc(size, GFP_KERNEL); |
1113 | if (!sunzilog_chip_regs) { | |
1114 | kfree(sunzilog_port_table); | |
1115 | sunzilog_irq_chain = NULL; | |
1116 | return -ENOMEM; | |
1da177e4 LT |
1117 | } |
1118 | ||
36764631 | 1119 | return 0; |
1da177e4 | 1120 | } |
1da177e4 | 1121 | |
36764631 | 1122 | static void sunzilog_free_tables(void) |
1da177e4 | 1123 | { |
36764631 DM |
1124 | kfree(sunzilog_port_table); |
1125 | sunzilog_irq_chain = NULL; | |
1126 | kfree(sunzilog_chip_regs); | |
1da177e4 LT |
1127 | } |
1128 | ||
1129 | #define ZS_PUT_CHAR_MAX_DELAY 2000 /* 10 ms */ | |
1130 | ||
d358788f | 1131 | static void sunzilog_putchar(struct uart_port *port, int ch) |
1da177e4 | 1132 | { |
48343273 | 1133 | struct zilog_channel __iomem *channel = ZILOG_CHANNEL_FROM_PORT(port); |
1da177e4 LT |
1134 | int loops = ZS_PUT_CHAR_MAX_DELAY; |
1135 | ||
1136 | /* This is a timed polling loop so do not switch the explicit | |
1137 | * udelay with ZSDELAY as that is a NOP on some platforms. -DaveM | |
1138 | */ | |
1139 | do { | |
36764631 | 1140 | unsigned char val = readb(&channel->control); |
1da177e4 LT |
1141 | if (val & Tx_BUF_EMP) { |
1142 | ZSDELAY(); | |
1143 | break; | |
1144 | } | |
1145 | udelay(5); | |
1146 | } while (--loops); | |
1147 | ||
36764631 | 1148 | writeb(ch, &channel->data); |
1da177e4 LT |
1149 | ZSDELAY(); |
1150 | ZS_WSYNC(channel); | |
1151 | } | |
1152 | ||
1153 | #ifdef CONFIG_SERIO | |
1154 | ||
1155 | static DEFINE_SPINLOCK(sunzilog_serio_lock); | |
1156 | ||
1157 | static int sunzilog_serio_write(struct serio *serio, unsigned char ch) | |
1158 | { | |
1159 | struct uart_sunzilog_port *up = serio->port_data; | |
1160 | unsigned long flags; | |
1161 | ||
1162 | spin_lock_irqsave(&sunzilog_serio_lock, flags); | |
1163 | ||
d358788f | 1164 | sunzilog_putchar(&up->port, ch); |
1da177e4 LT |
1165 | |
1166 | spin_unlock_irqrestore(&sunzilog_serio_lock, flags); | |
1167 | ||
1168 | return 0; | |
1169 | } | |
1170 | ||
1171 | static int sunzilog_serio_open(struct serio *serio) | |
1172 | { | |
1173 | struct uart_sunzilog_port *up = serio->port_data; | |
1174 | unsigned long flags; | |
1175 | int ret; | |
1176 | ||
1177 | spin_lock_irqsave(&sunzilog_serio_lock, flags); | |
1178 | if (!up->serio_open) { | |
1179 | up->serio_open = 1; | |
1180 | ret = 0; | |
1181 | } else | |
1182 | ret = -EBUSY; | |
1183 | spin_unlock_irqrestore(&sunzilog_serio_lock, flags); | |
1184 | ||
1185 | return ret; | |
1186 | } | |
1187 | ||
1188 | static void sunzilog_serio_close(struct serio *serio) | |
1189 | { | |
1190 | struct uart_sunzilog_port *up = serio->port_data; | |
1191 | unsigned long flags; | |
1192 | ||
1193 | spin_lock_irqsave(&sunzilog_serio_lock, flags); | |
1194 | up->serio_open = 0; | |
1195 | spin_unlock_irqrestore(&sunzilog_serio_lock, flags); | |
1196 | } | |
1197 | ||
1198 | #endif /* CONFIG_SERIO */ | |
1199 | ||
1200 | #ifdef CONFIG_SERIAL_SUNZILOG_CONSOLE | |
1201 | static void | |
1202 | sunzilog_console_write(struct console *con, const char *s, unsigned int count) | |
1203 | { | |
1204 | struct uart_sunzilog_port *up = &sunzilog_port_table[con->index]; | |
1da177e4 | 1205 | unsigned long flags; |
f3c681c0 DM |
1206 | int locked = 1; |
1207 | ||
e58e241c DM |
1208 | if (up->port.sysrq || oops_in_progress) |
1209 | locked = spin_trylock_irqsave(&up->port.lock, flags); | |
1210 | else | |
1211 | spin_lock_irqsave(&up->port.lock, flags); | |
1da177e4 | 1212 | |
d358788f | 1213 | uart_console_write(&up->port, s, count, sunzilog_putchar); |
1da177e4 | 1214 | udelay(2); |
f3c681c0 DM |
1215 | |
1216 | if (locked) | |
e58e241c | 1217 | spin_unlock_irqrestore(&up->port.lock, flags); |
1da177e4 LT |
1218 | } |
1219 | ||
1220 | static int __init sunzilog_console_setup(struct console *con, char *options) | |
1221 | { | |
1222 | struct uart_sunzilog_port *up = &sunzilog_port_table[con->index]; | |
1223 | unsigned long flags; | |
1224 | int baud, brg; | |
1225 | ||
b8b99e85 DM |
1226 | if (up->port.type != PORT_SUNZILOG) |
1227 | return -1; | |
1228 | ||
1da177e4 LT |
1229 | printk(KERN_INFO "Console: ttyS%d (SunZilog zs%d)\n", |
1230 | (sunzilog_reg.minor - 64) + con->index, con->index); | |
1231 | ||
1232 | /* Get firmware console settings. */ | |
2dc11581 | 1233 | sunserial_console_termios(con, up->port.dev->of_node); |
1da177e4 LT |
1234 | |
1235 | /* Firmware console speed is limited to 150-->38400 baud so | |
1236 | * this hackish cflag thing is OK. | |
1237 | */ | |
1238 | switch (con->cflag & CBAUD) { | |
1239 | case B150: baud = 150; break; | |
1240 | case B300: baud = 300; break; | |
1241 | case B600: baud = 600; break; | |
1242 | case B1200: baud = 1200; break; | |
1243 | case B2400: baud = 2400; break; | |
1244 | case B4800: baud = 4800; break; | |
1245 | default: case B9600: baud = 9600; break; | |
1246 | case B19200: baud = 19200; break; | |
1247 | case B38400: baud = 38400; break; | |
fc811472 | 1248 | } |
1da177e4 LT |
1249 | |
1250 | brg = BPS_TO_BRG(baud, ZS_CLOCK / ZS_CLOCK_DIVISOR); | |
1251 | ||
1252 | spin_lock_irqsave(&up->port.lock, flags); | |
1253 | ||
7cc5c855 | 1254 | up->curregs[R15] |= BRKIE; |
1da177e4 LT |
1255 | sunzilog_convert_to_zs(up, con->cflag, 0, brg); |
1256 | ||
1257 | sunzilog_set_mctrl(&up->port, TIOCM_DTR | TIOCM_RTS); | |
1258 | __sunzilog_startup(up); | |
1259 | ||
1260 | spin_unlock_irqrestore(&up->port.lock, flags); | |
1261 | ||
1262 | return 0; | |
1263 | } | |
1264 | ||
eba8cefc | 1265 | static struct console sunzilog_console_ops = { |
1da177e4 LT |
1266 | .name = "ttyS", |
1267 | .write = sunzilog_console_write, | |
1268 | .device = uart_console_device, | |
1269 | .setup = sunzilog_console_setup, | |
1270 | .flags = CON_PRINTBUFFER, | |
1271 | .index = -1, | |
1272 | .data = &sunzilog_reg, | |
1273 | }; | |
1da177e4 | 1274 | |
1ddb7c98 DM |
1275 | static inline struct console *SUNZILOG_CONSOLE(void) |
1276 | { | |
eba8cefc | 1277 | return &sunzilog_console_ops; |
1ddb7c98 DM |
1278 | } |
1279 | ||
1da177e4 | 1280 | #else |
1ddb7c98 | 1281 | #define SUNZILOG_CONSOLE() (NULL) |
1da177e4 LT |
1282 | #endif |
1283 | ||
9671f099 | 1284 | static void sunzilog_init_kbdms(struct uart_sunzilog_port *up) |
1da177e4 LT |
1285 | { |
1286 | int baud, brg; | |
1287 | ||
8a84eb16 | 1288 | if (up->flags & SUNZILOG_FLAG_CONS_KEYB) { |
1da177e4 LT |
1289 | up->cflag = B1200 | CS8 | CLOCAL | CREAD; |
1290 | baud = 1200; | |
1291 | } else { | |
1da177e4 LT |
1292 | up->cflag = B4800 | CS8 | CLOCAL | CREAD; |
1293 | baud = 4800; | |
1294 | } | |
1da177e4 | 1295 | |
7cc5c855 | 1296 | up->curregs[R15] |= BRKIE; |
1da177e4 LT |
1297 | brg = BPS_TO_BRG(baud, ZS_CLOCK / ZS_CLOCK_DIVISOR); |
1298 | sunzilog_convert_to_zs(up, up->cflag, 0, brg); | |
1299 | sunzilog_set_mctrl(&up->port, TIOCM_DTR | TIOCM_RTS); | |
1300 | __sunzilog_startup(up); | |
1301 | } | |
1302 | ||
1303 | #ifdef CONFIG_SERIO | |
9671f099 | 1304 | static void sunzilog_register_serio(struct uart_sunzilog_port *up) |
1da177e4 | 1305 | { |
36764631 | 1306 | struct serio *serio = &up->serio; |
1da177e4 | 1307 | |
36764631 | 1308 | serio->port_data = up; |
1da177e4 | 1309 | |
36764631 | 1310 | serio->id.type = SERIO_RS232; |
8a84eb16 | 1311 | if (up->flags & SUNZILOG_FLAG_CONS_KEYB) { |
36764631 DM |
1312 | serio->id.proto = SERIO_SUNKBD; |
1313 | strlcpy(serio->name, "zskbd", sizeof(serio->name)); | |
1da177e4 | 1314 | } else { |
36764631 DM |
1315 | serio->id.proto = SERIO_SUN; |
1316 | serio->id.extra = 1; | |
1317 | strlcpy(serio->name, "zsms", sizeof(serio->name)); | |
1da177e4 | 1318 | } |
36764631 | 1319 | strlcpy(serio->phys, |
8a84eb16 DM |
1320 | ((up->flags & SUNZILOG_FLAG_CONS_KEYB) ? |
1321 | "zs/serio0" : "zs/serio1"), | |
36764631 DM |
1322 | sizeof(serio->phys)); |
1323 | ||
1324 | serio->write = sunzilog_serio_write; | |
1325 | serio->open = sunzilog_serio_open; | |
1326 | serio->close = sunzilog_serio_close; | |
1327 | serio->dev.parent = up->port.dev; | |
1328 | ||
1329 | serio_register_port(serio); | |
1da177e4 LT |
1330 | } |
1331 | #endif | |
1332 | ||
9671f099 | 1333 | static void sunzilog_init_hw(struct uart_sunzilog_port *up) |
1da177e4 | 1334 | { |
36764631 DM |
1335 | struct zilog_channel __iomem *channel; |
1336 | unsigned long flags; | |
1337 | int baud, brg; | |
1da177e4 | 1338 | |
36764631 | 1339 | channel = ZILOG_CHANNEL_FROM_PORT(&up->port); |
1da177e4 | 1340 | |
36764631 DM |
1341 | spin_lock_irqsave(&up->port.lock, flags); |
1342 | if (ZS_IS_CHANNEL_A(up)) { | |
1343 | write_zsreg(channel, R9, FHWRES); | |
1344 | ZSDELAY_LONG(); | |
1345 | (void) read_zsreg(channel, R0); | |
1346 | } | |
1da177e4 | 1347 | |
8a84eb16 DM |
1348 | if (up->flags & (SUNZILOG_FLAG_CONS_KEYB | |
1349 | SUNZILOG_FLAG_CONS_MOUSE)) { | |
7cc5c855 MF |
1350 | up->curregs[R1] = EXT_INT_ENAB | INT_ALL_Rx | TxINT_ENAB; |
1351 | up->curregs[R4] = PAR_EVEN | X16CLK | SB1; | |
1352 | up->curregs[R3] = RxENAB | Rx8; | |
1353 | up->curregs[R5] = TxENAB | Tx8; | |
1354 | up->curregs[R6] = 0x00; /* SDLC Address */ | |
1355 | up->curregs[R7] = 0x7E; /* SDLC Flag */ | |
1356 | up->curregs[R9] = NV; | |
1357 | up->curregs[R7p] = 0x00; | |
3ade1160 | 1358 | sunzilog_init_kbdms(up); |
7cc5c855 MF |
1359 | /* Only enable interrupts if an ISR handler available */ |
1360 | if (up->flags & SUNZILOG_FLAG_ISR_HANDLER) | |
1361 | up->curregs[R9] |= MIE; | |
36764631 DM |
1362 | write_zsreg(channel, R9, up->curregs[R9]); |
1363 | } else { | |
1364 | /* Normal serial TTY. */ | |
1365 | up->parity_mask = 0xff; | |
1366 | up->curregs[R1] = EXT_INT_ENAB | INT_ALL_Rx | TxINT_ENAB; | |
1367 | up->curregs[R4] = PAR_EVEN | X16CLK | SB1; | |
1368 | up->curregs[R3] = RxENAB | Rx8; | |
1369 | up->curregs[R5] = TxENAB | Tx8; | |
7cc5c855 MF |
1370 | up->curregs[R6] = 0x00; /* SDLC Address */ |
1371 | up->curregs[R7] = 0x7E; /* SDLC Flag */ | |
1372 | up->curregs[R9] = NV; | |
36764631 DM |
1373 | up->curregs[R10] = NRZ; |
1374 | up->curregs[R11] = TCBR | RCBR; | |
1375 | baud = 9600; | |
1376 | brg = BPS_TO_BRG(baud, ZS_CLOCK / ZS_CLOCK_DIVISOR); | |
1377 | up->curregs[R12] = (brg & 0xff); | |
1378 | up->curregs[R13] = (brg >> 8) & 0xff; | |
1379 | up->curregs[R14] = BRSRC | BRENAB; | |
7cc5c855 MF |
1380 | up->curregs[R15] = FIFOEN; /* Use FIFO if on ESCC */ |
1381 | up->curregs[R7p] = TxFIFO_LVL | RxFIFO_LVL; | |
1382 | if (__load_zsregs(channel, up->curregs)) { | |
1383 | up->flags |= SUNZILOG_FLAG_ESCC; | |
1384 | } | |
1385 | /* Only enable interrupts if an ISR handler available */ | |
1386 | if (up->flags & SUNZILOG_FLAG_ISR_HANDLER) | |
1387 | up->curregs[R9] |= MIE; | |
36764631 DM |
1388 | write_zsreg(channel, R9, up->curregs[R9]); |
1389 | } | |
1da177e4 | 1390 | |
36764631 | 1391 | spin_unlock_irqrestore(&up->port.lock, flags); |
1da177e4 LT |
1392 | |
1393 | #ifdef CONFIG_SERIO | |
8a84eb16 DM |
1394 | if (up->flags & (SUNZILOG_FLAG_CONS_KEYB | |
1395 | SUNZILOG_FLAG_CONS_MOUSE)) | |
1396 | sunzilog_register_serio(up); | |
1da177e4 | 1397 | #endif |
1da177e4 LT |
1398 | } |
1399 | ||
d4e33fac | 1400 | static int zilog_irq; |
4fa97dcf | 1401 | |
9671f099 | 1402 | static int zs_probe(struct platform_device *op) |
36764631 | 1403 | { |
227739bf RR |
1404 | static int kbm_inst, uart_inst; |
1405 | int inst; | |
36764631 DM |
1406 | struct uart_sunzilog_port *up; |
1407 | struct zilog_layout __iomem *rp; | |
227739bf | 1408 | int keyboard_mouse = 0; |
36764631 | 1409 | int err; |
1da177e4 | 1410 | |
61c7a080 | 1411 | if (of_find_property(op->dev.of_node, "keyboard", NULL)) |
8a84eb16 DM |
1412 | keyboard_mouse = 1; |
1413 | ||
227739bf RR |
1414 | /* uarts must come before keyboards/mice */ |
1415 | if (keyboard_mouse) | |
1416 | inst = uart_chip_count + kbm_inst; | |
1417 | else | |
1418 | inst = uart_inst; | |
1419 | ||
36764631 DM |
1420 | sunzilog_chip_regs[inst] = of_ioremap(&op->resource[0], 0, |
1421 | sizeof(struct zilog_layout), | |
1422 | "zs"); | |
1423 | if (!sunzilog_chip_regs[inst]) | |
1424 | return -ENOMEM; | |
1da177e4 | 1425 | |
36764631 | 1426 | rp = sunzilog_chip_regs[inst]; |
1da177e4 | 1427 | |
d4e33fac | 1428 | if (!zilog_irq) |
1636f8ac | 1429 | zilog_irq = op->archdata.irqs[0]; |
1ddb7c98 | 1430 | |
36764631 DM |
1431 | up = &sunzilog_port_table[inst * 2]; |
1432 | ||
1433 | /* Channel A */ | |
1434 | up[0].port.mapbase = op->resource[0].start + 0x00; | |
1435 | up[0].port.membase = (void __iomem *) &rp->channelA; | |
1436 | up[0].port.iotype = UPIO_MEM; | |
1636f8ac | 1437 | up[0].port.irq = op->archdata.irqs[0]; |
36764631 DM |
1438 | up[0].port.uartclk = ZS_CLOCK; |
1439 | up[0].port.fifosize = 1; | |
1440 | up[0].port.ops = &sunzilog_pops; | |
1441 | up[0].port.type = PORT_SUNZILOG; | |
1442 | up[0].port.flags = 0; | |
1443 | up[0].port.line = (inst * 2) + 0; | |
1444 | up[0].port.dev = &op->dev; | |
1445 | up[0].flags |= SUNZILOG_FLAG_IS_CHANNEL_A; | |
8a84eb16 | 1446 | if (keyboard_mouse) |
36764631 DM |
1447 | up[0].flags |= SUNZILOG_FLAG_CONS_KEYB; |
1448 | sunzilog_init_hw(&up[0]); | |
1449 | ||
1450 | /* Channel B */ | |
1451 | up[1].port.mapbase = op->resource[0].start + 0x04; | |
1452 | up[1].port.membase = (void __iomem *) &rp->channelB; | |
1453 | up[1].port.iotype = UPIO_MEM; | |
1636f8ac | 1454 | up[1].port.irq = op->archdata.irqs[0]; |
36764631 DM |
1455 | up[1].port.uartclk = ZS_CLOCK; |
1456 | up[1].port.fifosize = 1; | |
1457 | up[1].port.ops = &sunzilog_pops; | |
1458 | up[1].port.type = PORT_SUNZILOG; | |
1459 | up[1].port.flags = 0; | |
1460 | up[1].port.line = (inst * 2) + 1; | |
1461 | up[1].port.dev = &op->dev; | |
1462 | up[1].flags |= 0; | |
8a84eb16 | 1463 | if (keyboard_mouse) |
36764631 DM |
1464 | up[1].flags |= SUNZILOG_FLAG_CONS_MOUSE; |
1465 | sunzilog_init_hw(&up[1]); | |
1466 | ||
8a84eb16 | 1467 | if (!keyboard_mouse) { |
61c7a080 | 1468 | if (sunserial_console_match(SUNZILOG_CONSOLE(), op->dev.of_node, |
4e3533d0 DM |
1469 | &sunzilog_reg, up[0].port.line, |
1470 | false)) | |
c73fcc84 | 1471 | up->flags |= SUNZILOG_FLAG_IS_CONS; |
36764631 DM |
1472 | err = uart_add_one_port(&sunzilog_reg, &up[0].port); |
1473 | if (err) { | |
e3a411a3 DM |
1474 | of_iounmap(&op->resource[0], |
1475 | rp, sizeof(struct zilog_layout)); | |
36764631 DM |
1476 | return err; |
1477 | } | |
61c7a080 | 1478 | if (sunserial_console_match(SUNZILOG_CONSOLE(), op->dev.of_node, |
4e3533d0 DM |
1479 | &sunzilog_reg, up[1].port.line, |
1480 | false)) | |
c73fcc84 | 1481 | up->flags |= SUNZILOG_FLAG_IS_CONS; |
36764631 DM |
1482 | err = uart_add_one_port(&sunzilog_reg, &up[1].port); |
1483 | if (err) { | |
1484 | uart_remove_one_port(&sunzilog_reg, &up[0].port); | |
e3a411a3 DM |
1485 | of_iounmap(&op->resource[0], |
1486 | rp, sizeof(struct zilog_layout)); | |
36764631 | 1487 | return err; |
1da177e4 | 1488 | } |
227739bf | 1489 | uart_inst++; |
8a84eb16 | 1490 | } else { |
4f1296a5 | 1491 | printk(KERN_INFO "%s: Keyboard at MMIO 0x%llx (irq = %d) " |
7cc5c855 | 1492 | "is a %s\n", |
65a212dd | 1493 | dev_name(&op->dev), |
4f1296a5 | 1494 | (unsigned long long) up[0].port.mapbase, |
1636f8ac | 1495 | op->archdata.irqs[0], sunzilog_type(&up[0].port)); |
4f1296a5 | 1496 | printk(KERN_INFO "%s: Mouse at MMIO 0x%llx (irq = %d) " |
7cc5c855 | 1497 | "is a %s\n", |
65a212dd | 1498 | dev_name(&op->dev), |
4f1296a5 | 1499 | (unsigned long long) up[1].port.mapbase, |
1636f8ac | 1500 | op->archdata.irqs[0], sunzilog_type(&up[1].port)); |
227739bf | 1501 | kbm_inst++; |
1da177e4 LT |
1502 | } |
1503 | ||
696faedd | 1504 | platform_set_drvdata(op, &up[0]); |
4fa97dcf | 1505 | |
36764631 | 1506 | return 0; |
1da177e4 LT |
1507 | } |
1508 | ||
ae8d8a14 | 1509 | static void zs_remove_one(struct uart_sunzilog_port *up) |
1da177e4 | 1510 | { |
36764631 DM |
1511 | if (ZS_IS_KEYB(up) || ZS_IS_MOUSE(up)) { |
1512 | #ifdef CONFIG_SERIO | |
1513 | serio_unregister_port(&up->serio); | |
1514 | #endif | |
1515 | } else | |
1516 | uart_remove_one_port(&sunzilog_reg, &up->port); | |
4fa97dcf | 1517 | } |
1da177e4 | 1518 | |
ae8d8a14 | 1519 | static int zs_remove(struct platform_device *op) |
4fa97dcf | 1520 | { |
696faedd | 1521 | struct uart_sunzilog_port *up = platform_get_drvdata(op); |
4fa97dcf DM |
1522 | struct zilog_layout __iomem *regs; |
1523 | ||
1524 | zs_remove_one(&up[0]); | |
1525 | zs_remove_one(&up[1]); | |
1da177e4 | 1526 | |
4fa97dcf | 1527 | regs = sunzilog_chip_regs[up[0].port.line / 2]; |
e3a411a3 | 1528 | of_iounmap(&op->resource[0], regs, sizeof(struct zilog_layout)); |
4fa97dcf | 1529 | |
36764631 | 1530 | return 0; |
1da177e4 LT |
1531 | } |
1532 | ||
fd098316 | 1533 | static const struct of_device_id zs_match[] = { |
36764631 DM |
1534 | { |
1535 | .name = "zs", | |
1536 | }, | |
1537 | {}, | |
1538 | }; | |
1539 | MODULE_DEVICE_TABLE(of, zs_match); | |
1540 | ||
793218df | 1541 | static struct platform_driver zs_driver = { |
4018294b GL |
1542 | .driver = { |
1543 | .name = "zs", | |
4018294b GL |
1544 | .of_match_table = zs_match, |
1545 | }, | |
36764631 | 1546 | .probe = zs_probe, |
2d47b716 | 1547 | .remove = zs_remove, |
36764631 DM |
1548 | }; |
1549 | ||
1da177e4 LT |
1550 | static int __init sunzilog_init(void) |
1551 | { | |
36764631 | 1552 | struct device_node *dp; |
227739bf RR |
1553 | int err; |
1554 | int num_keybms = 0; | |
58d784a5 | 1555 | int num_sunzilog = 0; |
1da177e4 | 1556 | |
8a84eb16 | 1557 | for_each_node_by_name(dp, "zs") { |
58d784a5 | 1558 | num_sunzilog++; |
8a84eb16 DM |
1559 | if (of_find_property(dp, "keyboard", NULL)) |
1560 | num_keybms++; | |
1561 | } | |
1da177e4 | 1562 | |
58d784a5 | 1563 | if (num_sunzilog) { |
58d784a5 | 1564 | err = sunzilog_alloc_tables(num_sunzilog); |
36764631 | 1565 | if (err) |
67e23a1e | 1566 | goto out; |
1da177e4 | 1567 | |
227739bf | 1568 | uart_chip_count = num_sunzilog - num_keybms; |
36764631 | 1569 | |
227739bf RR |
1570 | err = sunserial_register_minors(&sunzilog_reg, |
1571 | uart_chip_count * 2); | |
67e23a1e DM |
1572 | if (err) |
1573 | goto out_free_tables; | |
36764631 DM |
1574 | } |
1575 | ||
793218df | 1576 | err = platform_driver_register(&zs_driver); |
67e23a1e DM |
1577 | if (err) |
1578 | goto out_unregister_uart; | |
1579 | ||
ca6f327d | 1580 | if (zilog_irq) { |
7cc5c855 | 1581 | struct uart_sunzilog_port *up = sunzilog_irq_chain; |
67e23a1e DM |
1582 | err = request_irq(zilog_irq, sunzilog_interrupt, IRQF_SHARED, |
1583 | "zs", sunzilog_irq_chain); | |
1584 | if (err) | |
1585 | goto out_unregister_driver; | |
7cc5c855 MF |
1586 | |
1587 | /* Enable Interrupts */ | |
1588 | while (up) { | |
1589 | struct zilog_channel __iomem *channel; | |
1590 | ||
1591 | /* printk (KERN_INFO "Enable IRQ for ZILOG Hardware %p\n", up); */ | |
1592 | channel = ZILOG_CHANNEL_FROM_PORT(&up->port); | |
1593 | up->flags |= SUNZILOG_FLAG_ISR_HANDLER; | |
1594 | up->curregs[R9] |= MIE; | |
1595 | write_zsreg(channel, R9, up->curregs[R9]); | |
1596 | up = up->next; | |
1597 | } | |
67e23a1e DM |
1598 | } |
1599 | ||
1600 | out: | |
1601 | return err; | |
1602 | ||
1603 | out_unregister_driver: | |
793218df | 1604 | platform_driver_unregister(&zs_driver); |
67e23a1e DM |
1605 | |
1606 | out_unregister_uart: | |
58d784a5 MH |
1607 | if (num_sunzilog) { |
1608 | sunserial_unregister_minors(&sunzilog_reg, num_sunzilog); | |
67e23a1e DM |
1609 | sunzilog_reg.cons = NULL; |
1610 | } | |
1611 | ||
1612 | out_free_tables: | |
1613 | sunzilog_free_tables(); | |
1614 | goto out; | |
1da177e4 LT |
1615 | } |
1616 | ||
1617 | static void __exit sunzilog_exit(void) | |
1618 | { | |
793218df | 1619 | platform_driver_unregister(&zs_driver); |
1da177e4 | 1620 | |
ca6f327d | 1621 | if (zilog_irq) { |
7cc5c855 MF |
1622 | struct uart_sunzilog_port *up = sunzilog_irq_chain; |
1623 | ||
1624 | /* Disable Interrupts */ | |
1625 | while (up) { | |
1626 | struct zilog_channel __iomem *channel; | |
1627 | ||
1628 | /* printk (KERN_INFO "Disable IRQ for ZILOG Hardware %p\n", up); */ | |
1629 | channel = ZILOG_CHANNEL_FROM_PORT(&up->port); | |
1630 | up->flags &= ~SUNZILOG_FLAG_ISR_HANDLER; | |
1631 | up->curregs[R9] &= ~MIE; | |
1632 | write_zsreg(channel, R9, up->curregs[R9]); | |
1633 | up = up->next; | |
1634 | } | |
1635 | ||
4fa97dcf | 1636 | free_irq(zilog_irq, sunzilog_irq_chain); |
d4e33fac | 1637 | zilog_irq = 0; |
4fa97dcf DM |
1638 | } |
1639 | ||
58d784a5 MH |
1640 | if (sunzilog_reg.nr) { |
1641 | sunserial_unregister_minors(&sunzilog_reg, sunzilog_reg.nr); | |
36764631 | 1642 | sunzilog_free_tables(); |
1da177e4 | 1643 | } |
1da177e4 LT |
1644 | } |
1645 | ||
1646 | module_init(sunzilog_init); | |
1647 | module_exit(sunzilog_exit); | |
1648 | ||
1649 | MODULE_AUTHOR("David S. Miller"); | |
1650 | MODULE_DESCRIPTION("Sun Zilog serial port driver"); | |
9efc3715 | 1651 | MODULE_VERSION("2.0"); |
1da177e4 | 1652 | MODULE_LICENSE("GPL"); |