blob: e9d420ff39310741212eb77e194c13fca2662b18 [file] [log] [blame]
Linus Torvalds1da177e2005-04-16 15:20:36 -07001/*
Linus Torvalds1da177e2005-04-16 15:20:36 -07002 * Driver for PowerMac Z85c30 based ESCC cell found in the
3 * "macio" ASICs of various PowerMac models
4 *
5 * Copyright (C) 2003 Ben. Herrenschmidt (benh@kernel.crashing.org)
6 *
7 * Derived from drivers/macintosh/macserial.c by Paul Mackerras
8 * and drivers/serial/sunzilog.c by David S. Miller
9 *
10 * Hrm... actually, I ripped most of sunzilog (Thanks David !) and
11 * adapted special tweaks needed for us. I don't think it's worth
12 * merging back those though. The DMA code still has to get in
13 * and once done, I expect that driver to remain fairly stable in
14 * the long term, unless we change the driver model again...
15 *
16 * This program is free software; you can redistribute it and/or modify
17 * it under the terms of the GNU General Public License as published by
18 * the Free Software Foundation; either version 2 of the License, or
19 * (at your option) any later version.
20 *
21 * This program is distributed in the hope that it will be useful,
22 * but WITHOUT ANY WARRANTY; without even the implied warranty of
23 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
24 * GNU General Public License for more details.
25 *
26 * You should have received a copy of the GNU General Public License
27 * along with this program; if not, write to the Free Software
28 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
29 *
30 * 2004-08-06 Harald Welte <laforge@gnumonks.org>
31 * - Enable BREAK interrupt
32 * - Add support for sysreq
33 *
34 * TODO: - Add DMA support
35 * - Defer port shutdown to a few seconds after close
36 * - maybe put something right into uap->clk_divisor
37 */
38
39#undef DEBUG
40#undef DEBUG_HARD
41#undef USE_CTRL_O_SYSRQ
42
Linus Torvalds1da177e2005-04-16 15:20:36 -070043#include <linux/module.h>
44#include <linux/tty.h>
45
46#include <linux/tty_flip.h>
47#include <linux/major.h>
48#include <linux/string.h>
49#include <linux/fcntl.h>
50#include <linux/mm.h>
51#include <linux/kernel.h>
52#include <linux/delay.h>
53#include <linux/init.h>
54#include <linux/console.h>
Linus Torvalds1da177e2005-04-16 15:20:36 -070055#include <linux/adb.h>
56#include <linux/pmu.h>
57#include <linux/bitops.h>
58#include <linux/sysrq.h>
Arjan van de Venf392ecf2006-01-12 18:44:32 +000059#include <linux/mutex.h>
Rob Herring5af50732013-09-17 14:28:33 -050060#include <linux/of_address.h>
61#include <linux/of_irq.h>
Linus Torvalds1da177e2005-04-16 15:20:36 -070062#include <asm/sections.h>
63#include <asm/io.h>
64#include <asm/irq.h>
Finn Thainec9cbe02009-11-17 20:04:44 +110065
66#ifdef CONFIG_PPC_PMAC
Linus Torvalds1da177e2005-04-16 15:20:36 -070067#include <asm/prom.h>
68#include <asm/machdep.h>
69#include <asm/pmac_feature.h>
70#include <asm/dbdma.h>
71#include <asm/macio.h>
Finn Thainec9cbe02009-11-17 20:04:44 +110072#else
73#include <linux/platform_device.h>
74#define of_machine_is_compatible(x) (0)
75#endif
Linus Torvalds1da177e2005-04-16 15:20:36 -070076
77#if defined (CONFIG_SERIAL_PMACZILOG_CONSOLE) && defined(CONFIG_MAGIC_SYSRQ)
78#define SUPPORT_SYSRQ
79#endif
80
81#include <linux/serial.h>
82#include <linux/serial_core.h>
83
84#include "pmac_zilog.h"
85
86/* Not yet implemented */
87#undef HAS_DBDMA
88
89static char version[] __initdata = "pmac_zilog: 0.6 (Benjamin Herrenschmidt <benh@kernel.crashing.org>)";
90MODULE_AUTHOR("Benjamin Herrenschmidt <benh@kernel.crashing.org>");
Finn Thainec9cbe02009-11-17 20:04:44 +110091MODULE_DESCRIPTION("Driver for the Mac and PowerMac serial ports.");
Linus Torvalds1da177e2005-04-16 15:20:36 -070092MODULE_LICENSE("GPL");
93
David Woodhousee4533b22007-04-05 00:19:43 +100094#ifdef CONFIG_SERIAL_PMACZILOG_TTYS
95#define PMACZILOG_MAJOR TTY_MAJOR
96#define PMACZILOG_MINOR 64
97#define PMACZILOG_NAME "ttyS"
98#else
99#define PMACZILOG_MAJOR 204
100#define PMACZILOG_MINOR 192
101#define PMACZILOG_NAME "ttyPZ"
102#endif
103
Benjamin Herrenschmidta79dd5a2011-12-15 11:13:03 +1100104#define pmz_debug(fmt, arg...) pr_debug("ttyPZ%d: " fmt, uap->port.line, ## arg)
105#define pmz_error(fmt, arg...) pr_err("ttyPZ%d: " fmt, uap->port.line, ## arg)
106#define pmz_info(fmt, arg...) pr_info("ttyPZ%d: " fmt, uap->port.line, ## arg)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700107
108/*
109 * For the sake of early serial console, we can do a pre-probe
110 * (optional) of the ports at rather early boot time.
111 */
112static struct uart_pmac_port pmz_ports[MAX_ZS_PORTS];
113static int pmz_ports_count;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700114
115static struct uart_driver pmz_uart_reg = {
116 .owner = THIS_MODULE,
David Woodhousee4533b22007-04-05 00:19:43 +1000117 .driver_name = PMACZILOG_NAME,
118 .dev_name = PMACZILOG_NAME,
119 .major = PMACZILOG_MAJOR,
120 .minor = PMACZILOG_MINOR,
Linus Torvalds1da177e2005-04-16 15:20:36 -0700121};
122
123
124/*
125 * Load all registers to reprogram the port
126 * This function must only be called when the TX is not busy. The UART
127 * port lock must be held and local interrupts disabled.
128 */
129static void pmz_load_zsregs(struct uart_pmac_port *uap, u8 *regs)
130{
131 int i;
132
Linus Torvalds1da177e2005-04-16 15:20:36 -0700133 /* Let pending transmits finish. */
134 for (i = 0; i < 1000; i++) {
135 unsigned char stat = read_zsreg(uap, R1);
136 if (stat & ALL_SNT)
137 break;
138 udelay(100);
139 }
140
141 ZS_CLEARERR(uap);
142 zssync(uap);
143 ZS_CLEARFIFO(uap);
144 zssync(uap);
145 ZS_CLEARERR(uap);
146
147 /* Disable all interrupts. */
148 write_zsreg(uap, R1,
149 regs[R1] & ~(RxINT_MASK | TxINT_ENAB | EXT_INT_ENAB));
150
151 /* Set parity, sync config, stop bits, and clock divisor. */
152 write_zsreg(uap, R4, regs[R4]);
153
154 /* Set misc. TX/RX control bits. */
155 write_zsreg(uap, R10, regs[R10]);
156
157 /* Set TX/RX controls sans the enable bits. */
Finn Thain1f7b5ff2009-11-04 00:40:23 +1100158 write_zsreg(uap, R3, regs[R3] & ~RxENABLE);
159 write_zsreg(uap, R5, regs[R5] & ~TxENABLE);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700160
161 /* now set R7 "prime" on ESCC */
162 write_zsreg(uap, R15, regs[R15] | EN85C30);
163 write_zsreg(uap, R7, regs[R7P]);
164
165 /* make sure we use R7 "non-prime" on ESCC */
166 write_zsreg(uap, R15, regs[R15] & ~EN85C30);
167
168 /* Synchronous mode config. */
169 write_zsreg(uap, R6, regs[R6]);
170 write_zsreg(uap, R7, regs[R7]);
171
172 /* Disable baud generator. */
173 write_zsreg(uap, R14, regs[R14] & ~BRENAB);
174
175 /* Clock mode control. */
176 write_zsreg(uap, R11, regs[R11]);
177
178 /* Lower and upper byte of baud rate generator divisor. */
179 write_zsreg(uap, R12, regs[R12]);
180 write_zsreg(uap, R13, regs[R13]);
181
182 /* Now rewrite R14, with BRENAB (if set). */
183 write_zsreg(uap, R14, regs[R14]);
184
185 /* Reset external status interrupts. */
186 write_zsreg(uap, R0, RES_EXT_INT);
187 write_zsreg(uap, R0, RES_EXT_INT);
188
189 /* Rewrite R3/R5, this time without enables masked. */
190 write_zsreg(uap, R3, regs[R3]);
191 write_zsreg(uap, R5, regs[R5]);
192
193 /* Rewrite R1, this time without IRQ enabled masked. */
194 write_zsreg(uap, R1, regs[R1]);
195
196 /* Enable interrupts */
197 write_zsreg(uap, R9, regs[R9]);
198}
199
200/*
201 * We do like sunzilog to avoid disrupting pending Tx
202 * Reprogram the Zilog channel HW registers with the copies found in the
203 * software state struct. If the transmitter is busy, we defer this update
204 * until the next TX complete interrupt. Else, we do it right now.
205 *
206 * The UART port lock must be held and local interrupts disabled.
207 */
208static void pmz_maybe_update_regs(struct uart_pmac_port *uap)
209{
Finn Thain1f7b5ff2009-11-04 00:40:23 +1100210 if (!ZS_REGS_HELD(uap)) {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700211 if (ZS_TX_ACTIVE(uap)) {
212 uap->flags |= PMACZILOG_FLAG_REGS_HELD;
213 } else {
214 pmz_debug("pmz: maybe_update_regs: updating\n");
215 pmz_load_zsregs(uap, uap->curregs);
216 }
217 }
218}
219
Finn Thain7cf82b12011-12-06 17:49:36 +0000220static void pmz_interrupt_control(struct uart_pmac_port *uap, int enable)
221{
222 if (enable) {
223 uap->curregs[1] |= INT_ALL_Rx | TxINT_ENAB;
224 if (!ZS_IS_EXTCLK(uap))
225 uap->curregs[1] |= EXT_INT_ENAB;
226 } else {
227 uap->curregs[1] &= ~(EXT_INT_ENAB | TxINT_ENAB | RxINT_MASK);
228 }
229 write_zsreg(uap, R1, uap->curregs[1]);
230}
231
Jiri Slaby2e124b42013-01-03 15:53:06 +0100232static bool pmz_receive_chars(struct uart_pmac_port *uap)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700233{
Jiri Slaby92a19f92013-01-03 15:53:03 +0100234 struct tty_port *port;
Alan Cox33f0f882006-01-09 20:54:13 -0800235 unsigned char ch, r1, drop, error, flag;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700236 int loops = 0;
237
Linus Torvalds1da177e2005-04-16 15:20:36 -0700238 /* Sanity check, make sure the old bug is no longer happening */
Jiri Slaby2e124b42013-01-03 15:53:06 +0100239 if (uap->port.state == NULL) {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700240 WARN_ON(1);
241 (void)read_zsdata(uap);
Jiri Slaby2e124b42013-01-03 15:53:06 +0100242 return false;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700243 }
Jiri Slaby92a19f92013-01-03 15:53:03 +0100244 port = &uap->port.state->port;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700245
246 while (1) {
247 error = 0;
248 drop = 0;
249
Linus Torvalds1da177e2005-04-16 15:20:36 -0700250 r1 = read_zsreg(uap, R1);
251 ch = read_zsdata(uap);
252
253 if (r1 & (PAR_ERR | Rx_OVR | CRC_ERR)) {
254 write_zsreg(uap, R0, ERR_RES);
255 zssync(uap);
256 }
257
258 ch &= uap->parity_mask;
259 if (ch == 0 && uap->flags & PMACZILOG_FLAG_BREAK) {
260 uap->flags &= ~PMACZILOG_FLAG_BREAK;
261 }
262
263#if defined(CONFIG_MAGIC_SYSRQ) && defined(CONFIG_SERIAL_CORE_CONSOLE)
264#ifdef USE_CTRL_O_SYSRQ
265 /* Handle the SysRq ^O Hack */
266 if (ch == '\x0f') {
267 uap->port.sysrq = jiffies + HZ*5;
268 goto next_char;
269 }
270#endif /* USE_CTRL_O_SYSRQ */
271 if (uap->port.sysrq) {
272 int swallow;
273 spin_unlock(&uap->port.lock);
David Howells7d12e782006-10-05 14:55:46 +0100274 swallow = uart_handle_sysrq_char(&uap->port, ch);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700275 spin_lock(&uap->port.lock);
276 if (swallow)
277 goto next_char;
Finn Thain1f7b5ff2009-11-04 00:40:23 +1100278 }
Linus Torvalds1da177e2005-04-16 15:20:36 -0700279#endif /* CONFIG_MAGIC_SYSRQ && CONFIG_SERIAL_CORE_CONSOLE */
280
281 /* A real serial line, record the character and status. */
282 if (drop)
283 goto next_char;
284
Alan Cox33f0f882006-01-09 20:54:13 -0800285 flag = TTY_NORMAL;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700286 uap->port.icount.rx++;
287
288 if (r1 & (PAR_ERR | Rx_OVR | CRC_ERR | BRK_ABRT)) {
289 error = 1;
290 if (r1 & BRK_ABRT) {
291 pmz_debug("pmz: got break !\n");
292 r1 &= ~(PAR_ERR | CRC_ERR);
293 uap->port.icount.brk++;
294 if (uart_handle_break(&uap->port))
295 goto next_char;
296 }
297 else if (r1 & PAR_ERR)
298 uap->port.icount.parity++;
299 else if (r1 & CRC_ERR)
300 uap->port.icount.frame++;
301 if (r1 & Rx_OVR)
302 uap->port.icount.overrun++;
303 r1 &= uap->port.read_status_mask;
304 if (r1 & BRK_ABRT)
Alan Cox33f0f882006-01-09 20:54:13 -0800305 flag = TTY_BREAK;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700306 else if (r1 & PAR_ERR)
Alan Cox33f0f882006-01-09 20:54:13 -0800307 flag = TTY_PARITY;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700308 else if (r1 & CRC_ERR)
Alan Cox33f0f882006-01-09 20:54:13 -0800309 flag = TTY_FRAME;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700310 }
311
312 if (uap->port.ignore_status_mask == 0xff ||
313 (r1 & uap->port.ignore_status_mask) == 0) {
Jiri Slaby92a19f92013-01-03 15:53:03 +0100314 tty_insert_flip_char(port, ch, flag);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700315 }
Alan Cox33f0f882006-01-09 20:54:13 -0800316 if (r1 & Rx_OVR)
Jiri Slaby92a19f92013-01-03 15:53:03 +0100317 tty_insert_flip_char(port, 0, TTY_OVERRUN);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700318 next_char:
319 /* We can get stuck in an infinite loop getting char 0 when the
320 * line is in a wrong HW state, we break that here.
321 * When that happens, I disable the receive side of the driver.
322 * Note that what I've been experiencing is a real irq loop where
323 * I'm getting flooded regardless of the actual port speed.
Lucas De Marchi25985ed2011-03-30 22:57:33 -0300324 * Something strange is going on with the HW
Linus Torvalds1da177e2005-04-16 15:20:36 -0700325 */
326 if ((++loops) > 1000)
327 goto flood;
328 ch = read_zsreg(uap, R0);
329 if (!(ch & Rx_CH_AV))
330 break;
331 }
332
Jiri Slaby2e124b42013-01-03 15:53:06 +0100333 return true;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700334 flood:
Finn Thain7cf82b12011-12-06 17:49:36 +0000335 pmz_interrupt_control(uap, 0);
Finn Thainec9cbe02009-11-17 20:04:44 +1100336 pmz_error("pmz: rx irq flood !\n");
Jiri Slaby2e124b42013-01-03 15:53:06 +0100337 return true;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700338}
339
David Howells7d12e782006-10-05 14:55:46 +0100340static void pmz_status_handle(struct uart_pmac_port *uap)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700341{
342 unsigned char status;
343
344 status = read_zsreg(uap, R0);
345 write_zsreg(uap, R0, RES_EXT_INT);
346 zssync(uap);
347
348 if (ZS_IS_OPEN(uap) && ZS_WANTS_MODEM_STATUS(uap)) {
349 if (status & SYNC_HUNT)
350 uap->port.icount.dsr++;
351
352 /* The Zilog just gives us an interrupt when DCD/CTS/etc. change.
353 * But it does not tell us which bit has changed, we have to keep
354 * track of this ourselves.
355 * The CTS input is inverted for some reason. -- paulus
356 */
357 if ((status ^ uap->prev_status) & DCD)
358 uart_handle_dcd_change(&uap->port,
359 (status & DCD));
360 if ((status ^ uap->prev_status) & CTS)
361 uart_handle_cts_change(&uap->port,
362 !(status & CTS));
363
Alan Coxbdc04e32009-09-19 13:13:31 -0700364 wake_up_interruptible(&uap->port.state->port.delta_msr_wait);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700365 }
366
367 if (status & BRK_ABRT)
368 uap->flags |= PMACZILOG_FLAG_BREAK;
369
370 uap->prev_status = status;
371}
372
373static void pmz_transmit_chars(struct uart_pmac_port *uap)
374{
375 struct circ_buf *xmit;
376
Linus Torvalds1da177e2005-04-16 15:20:36 -0700377 if (ZS_IS_CONS(uap)) {
378 unsigned char status = read_zsreg(uap, R0);
379
380 /* TX still busy? Just wait for the next TX done interrupt.
381 *
382 * It can occur because of how we do serial console writes. It would
383 * be nice to transmit console writes just like we normally would for
384 * a TTY line. (ie. buffered and TX interrupt driven). That is not
385 * easy because console writes cannot sleep. One solution might be
Lucas De Marchi25985ed2011-03-30 22:57:33 -0300386 * to poll on enough port->xmit space becoming free. -DaveM
Linus Torvalds1da177e2005-04-16 15:20:36 -0700387 */
388 if (!(status & Tx_BUF_EMP))
389 return;
390 }
391
392 uap->flags &= ~PMACZILOG_FLAG_TX_ACTIVE;
393
394 if (ZS_REGS_HELD(uap)) {
395 pmz_load_zsregs(uap, uap->curregs);
396 uap->flags &= ~PMACZILOG_FLAG_REGS_HELD;
397 }
398
399 if (ZS_TX_STOPPED(uap)) {
400 uap->flags &= ~PMACZILOG_FLAG_TX_STOPPED;
401 goto ack_tx_int;
402 }
403
Benjamin Herrenschmidt02ab8512010-01-10 17:51:42 +0000404 /* Under some circumstances, we see interrupts reported for
405 * a closed channel. The interrupt mask in R1 is clear, but
406 * R3 still signals the interrupts and we see them when taking
407 * an interrupt for the other channel (this could be a qemu
408 * bug but since the ESCC doc doesn't specify precsiely whether
409 * R3 interrup status bits are masked by R1 interrupt enable
410 * bits, better safe than sorry). --BenH.
411 */
412 if (!ZS_IS_OPEN(uap))
413 goto ack_tx_int;
414
Linus Torvalds1da177e2005-04-16 15:20:36 -0700415 if (uap->port.x_char) {
416 uap->flags |= PMACZILOG_FLAG_TX_ACTIVE;
417 write_zsdata(uap, uap->port.x_char);
418 zssync(uap);
419 uap->port.icount.tx++;
420 uap->port.x_char = 0;
421 return;
422 }
423
Alan Coxebd2c8f2009-09-19 13:13:28 -0700424 if (uap->port.state == NULL)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700425 goto ack_tx_int;
Alan Coxebd2c8f2009-09-19 13:13:28 -0700426 xmit = &uap->port.state->xmit;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700427 if (uart_circ_empty(xmit)) {
428 uart_write_wakeup(&uap->port);
429 goto ack_tx_int;
430 }
431 if (uart_tx_stopped(&uap->port))
432 goto ack_tx_int;
433
434 uap->flags |= PMACZILOG_FLAG_TX_ACTIVE;
435 write_zsdata(uap, xmit->buf[xmit->tail]);
436 zssync(uap);
437
438 xmit->tail = (xmit->tail + 1) & (UART_XMIT_SIZE - 1);
439 uap->port.icount.tx++;
440
441 if (uart_circ_chars_pending(xmit) < WAKEUP_CHARS)
442 uart_write_wakeup(&uap->port);
443
444 return;
445
446ack_tx_int:
447 write_zsreg(uap, R0, RES_Tx_P);
448 zssync(uap);
449}
450
451/* Hrm... we register that twice, fixme later.... */
David Howells7d12e782006-10-05 14:55:46 +0100452static irqreturn_t pmz_interrupt(int irq, void *dev_id)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700453{
454 struct uart_pmac_port *uap = dev_id;
455 struct uart_pmac_port *uap_a;
456 struct uart_pmac_port *uap_b;
457 int rc = IRQ_NONE;
Jiri Slaby2e124b42013-01-03 15:53:06 +0100458 bool push;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700459 u8 r3;
460
461 uap_a = pmz_get_port_A(uap);
462 uap_b = uap_a->mate;
Finn Thain1f7b5ff2009-11-04 00:40:23 +1100463
464 spin_lock(&uap_a->port.lock);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700465 r3 = read_zsreg(uap_a, R3);
466
467#ifdef DEBUG_HARD
468 pmz_debug("irq, r3: %x\n", r3);
469#endif
Finn Thain1f7b5ff2009-11-04 00:40:23 +1100470 /* Channel A */
Jiri Slaby2e124b42013-01-03 15:53:06 +0100471 push = false;
Finn Thain1f7b5ff2009-11-04 00:40:23 +1100472 if (r3 & (CHAEXT | CHATxIP | CHARxIP)) {
Benjamin Herrenschmidta79dd5a2011-12-15 11:13:03 +1100473 if (!ZS_IS_OPEN(uap_a)) {
Larry Finger810b4de2012-04-28 18:53:49 -0500474 pmz_debug("ChanA interrupt while not open !\n");
Benjamin Herrenschmidta79dd5a2011-12-15 11:13:03 +1100475 goto skip_a;
476 }
Linus Torvalds1da177e2005-04-16 15:20:36 -0700477 write_zsreg(uap_a, R0, RES_H_IUS);
478 zssync(uap_a);
Finn Thain1f7b5ff2009-11-04 00:40:23 +1100479 if (r3 & CHAEXT)
480 pmz_status_handle(uap_a);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700481 if (r3 & CHARxIP)
Jiri Slaby2e124b42013-01-03 15:53:06 +0100482 push = pmz_receive_chars(uap_a);
Finn Thain1f7b5ff2009-11-04 00:40:23 +1100483 if (r3 & CHATxIP)
484 pmz_transmit_chars(uap_a);
485 rc = IRQ_HANDLED;
486 }
Benjamin Herrenschmidta79dd5a2011-12-15 11:13:03 +1100487 skip_a:
Finn Thain1f7b5ff2009-11-04 00:40:23 +1100488 spin_unlock(&uap_a->port.lock);
Jiri Slaby2e124b42013-01-03 15:53:06 +0100489 if (push)
490 tty_flip_buffer_push(&uap->port.state->port);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700491
Benjamin Herrenschmidta79dd5a2011-12-15 11:13:03 +1100492 if (!uap_b)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700493 goto out;
494
Finn Thain1f7b5ff2009-11-04 00:40:23 +1100495 spin_lock(&uap_b->port.lock);
Jiri Slaby2e124b42013-01-03 15:53:06 +0100496 push = false;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700497 if (r3 & (CHBEXT | CHBTxIP | CHBRxIP)) {
Larry Finger810b4de2012-04-28 18:53:49 -0500498 if (!ZS_IS_OPEN(uap_b)) {
499 pmz_debug("ChanB interrupt while not open !\n");
Benjamin Herrenschmidta79dd5a2011-12-15 11:13:03 +1100500 goto skip_b;
501 }
Linus Torvalds1da177e2005-04-16 15:20:36 -0700502 write_zsreg(uap_b, R0, RES_H_IUS);
503 zssync(uap_b);
Finn Thain1f7b5ff2009-11-04 00:40:23 +1100504 if (r3 & CHBEXT)
505 pmz_status_handle(uap_b);
506 if (r3 & CHBRxIP)
Jiri Slaby2e124b42013-01-03 15:53:06 +0100507 push = pmz_receive_chars(uap_b);
Finn Thain1f7b5ff2009-11-04 00:40:23 +1100508 if (r3 & CHBTxIP)
509 pmz_transmit_chars(uap_b);
510 rc = IRQ_HANDLED;
511 }
Benjamin Herrenschmidta79dd5a2011-12-15 11:13:03 +1100512 skip_b:
Finn Thain1f7b5ff2009-11-04 00:40:23 +1100513 spin_unlock(&uap_b->port.lock);
Jiri Slaby2e124b42013-01-03 15:53:06 +0100514 if (push)
515 tty_flip_buffer_push(&uap->port.state->port);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700516
517 out:
Linus Torvalds1da177e2005-04-16 15:20:36 -0700518 return rc;
519}
520
521/*
522 * Peek the status register, lock not held by caller
523 */
524static inline u8 pmz_peek_status(struct uart_pmac_port *uap)
525{
526 unsigned long flags;
527 u8 status;
528
529 spin_lock_irqsave(&uap->port.lock, flags);
530 status = read_zsreg(uap, R0);
531 spin_unlock_irqrestore(&uap->port.lock, flags);
532
533 return status;
534}
535
536/*
537 * Check if transmitter is empty
538 * The port lock is not held.
539 */
540static unsigned int pmz_tx_empty(struct uart_port *port)
541{
Linus Torvalds1da177e2005-04-16 15:20:36 -0700542 unsigned char status;
543
Linus Torvalds1da177e2005-04-16 15:20:36 -0700544 status = pmz_peek_status(to_pmz(port));
545 if (status & Tx_BUF_EMP)
546 return TIOCSER_TEMT;
547 return 0;
548}
549
550/*
551 * Set Modem Control (RTS & DTR) bits
552 * The port lock is held and interrupts are disabled.
553 * Note: Shall we really filter out RTS on external ports or
554 * should that be dealt at higher level only ?
555 */
556static void pmz_set_mctrl(struct uart_port *port, unsigned int mctrl)
557{
558 struct uart_pmac_port *uap = to_pmz(port);
559 unsigned char set_bits, clear_bits;
560
561 /* Do nothing for irda for now... */
562 if (ZS_IS_IRDA(uap))
563 return;
564 /* We get called during boot with a port not up yet */
Benjamin Herrenschmidta79dd5a2011-12-15 11:13:03 +1100565 if (!(ZS_IS_OPEN(uap) || ZS_IS_CONS(uap)))
Linus Torvalds1da177e2005-04-16 15:20:36 -0700566 return;
567
568 set_bits = clear_bits = 0;
569
570 if (ZS_IS_INTMODEM(uap)) {
571 if (mctrl & TIOCM_RTS)
572 set_bits |= RTS;
573 else
574 clear_bits |= RTS;
575 }
576 if (mctrl & TIOCM_DTR)
577 set_bits |= DTR;
578 else
579 clear_bits |= DTR;
580
581 /* NOTE: Not subject to 'transmitter active' rule. */
582 uap->curregs[R5] |= set_bits;
583 uap->curregs[R5] &= ~clear_bits;
Benjamin Herrenschmidta79dd5a2011-12-15 11:13:03 +1100584
Linus Torvalds1da177e2005-04-16 15:20:36 -0700585 write_zsreg(uap, R5, uap->curregs[R5]);
586 pmz_debug("pmz_set_mctrl: set bits: %x, clear bits: %x -> %x\n",
587 set_bits, clear_bits, uap->curregs[R5]);
588 zssync(uap);
589}
590
591/*
592 * Get Modem Control bits (only the input ones, the core will
593 * or that with a cached value of the control ones)
Russell Kingc5f46442005-06-29 09:42:38 +0100594 * The port lock is held and interrupts are disabled.
Linus Torvalds1da177e2005-04-16 15:20:36 -0700595 */
596static unsigned int pmz_get_mctrl(struct uart_port *port)
597{
598 struct uart_pmac_port *uap = to_pmz(port);
599 unsigned char status;
600 unsigned int ret;
601
Russell Kingc5f46442005-06-29 09:42:38 +0100602 status = read_zsreg(uap, R0);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700603
604 ret = 0;
605 if (status & DCD)
606 ret |= TIOCM_CAR;
607 if (status & SYNC_HUNT)
608 ret |= TIOCM_DSR;
609 if (!(status & CTS))
610 ret |= TIOCM_CTS;
611
612 return ret;
613}
614
615/*
616 * Stop TX side. Dealt like sunzilog at next Tx interrupt,
Russell Kingb129a8c2005-08-31 10:12:14 +0100617 * though for DMA, we will have to do a bit more.
Linus Torvalds1da177e2005-04-16 15:20:36 -0700618 * The port lock is held and interrupts are disabled.
619 */
Russell Kingb129a8c2005-08-31 10:12:14 +0100620static void pmz_stop_tx(struct uart_port *port)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700621{
622 to_pmz(port)->flags |= PMACZILOG_FLAG_TX_STOPPED;
623}
624
625/*
626 * Kick the Tx side.
627 * The port lock is held and interrupts are disabled.
628 */
Russell Kingb129a8c2005-08-31 10:12:14 +0100629static void pmz_start_tx(struct uart_port *port)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700630{
631 struct uart_pmac_port *uap = to_pmz(port);
632 unsigned char status;
633
634 pmz_debug("pmz: start_tx()\n");
635
636 uap->flags |= PMACZILOG_FLAG_TX_ACTIVE;
637 uap->flags &= ~PMACZILOG_FLAG_TX_STOPPED;
638
Linus Torvalds1da177e2005-04-16 15:20:36 -0700639 status = read_zsreg(uap, R0);
640
641 /* TX busy? Just wait for the TX done interrupt. */
642 if (!(status & Tx_BUF_EMP))
643 return;
644
645 /* Send the first character to jump-start the TX done
646 * IRQ sending engine.
647 */
648 if (port->x_char) {
649 write_zsdata(uap, port->x_char);
650 zssync(uap);
651 port->icount.tx++;
652 port->x_char = 0;
653 } else {
Alan Coxebd2c8f2009-09-19 13:13:28 -0700654 struct circ_buf *xmit = &port->state->xmit;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700655
656 write_zsdata(uap, xmit->buf[xmit->tail]);
657 zssync(uap);
658 xmit->tail = (xmit->tail + 1) & (UART_XMIT_SIZE - 1);
659 port->icount.tx++;
660
661 if (uart_circ_chars_pending(xmit) < WAKEUP_CHARS)
662 uart_write_wakeup(&uap->port);
663 }
664 pmz_debug("pmz: start_tx() done.\n");
665}
666
667/*
668 * Stop Rx side, basically disable emitting of
669 * Rx interrupts on the port. We don't disable the rx
670 * side of the chip proper though
671 * The port lock is held.
672 */
673static void pmz_stop_rx(struct uart_port *port)
674{
675 struct uart_pmac_port *uap = to_pmz(port);
676
Linus Torvalds1da177e2005-04-16 15:20:36 -0700677 pmz_debug("pmz: stop_rx()()\n");
678
679 /* Disable all RX interrupts. */
680 uap->curregs[R1] &= ~RxINT_MASK;
681 pmz_maybe_update_regs(uap);
682
683 pmz_debug("pmz: stop_rx() done.\n");
684}
685
686/*
687 * Enable modem status change interrupts
688 * The port lock is held.
689 */
690static void pmz_enable_ms(struct uart_port *port)
691{
692 struct uart_pmac_port *uap = to_pmz(port);
693 unsigned char new_reg;
694
Benjamin Herrenschmidta79dd5a2011-12-15 11:13:03 +1100695 if (ZS_IS_IRDA(uap))
Linus Torvalds1da177e2005-04-16 15:20:36 -0700696 return;
697 new_reg = uap->curregs[R15] | (DCDIE | SYNCIE | CTSIE);
698 if (new_reg != uap->curregs[R15]) {
699 uap->curregs[R15] = new_reg;
700
Finn Thain1f7b5ff2009-11-04 00:40:23 +1100701 /* NOTE: Not subject to 'transmitter active' rule. */
Linus Torvalds1da177e2005-04-16 15:20:36 -0700702 write_zsreg(uap, R15, uap->curregs[R15]);
703 }
704}
705
706/*
707 * Control break state emission
708 * The port lock is not held.
709 */
710static void pmz_break_ctl(struct uart_port *port, int break_state)
711{
712 struct uart_pmac_port *uap = to_pmz(port);
713 unsigned char set_bits, clear_bits, new_reg;
714 unsigned long flags;
715
Linus Torvalds1da177e2005-04-16 15:20:36 -0700716 set_bits = clear_bits = 0;
717
718 if (break_state)
719 set_bits |= SND_BRK;
720 else
721 clear_bits |= SND_BRK;
722
723 spin_lock_irqsave(&port->lock, flags);
724
725 new_reg = (uap->curregs[R5] | set_bits) & ~clear_bits;
726 if (new_reg != uap->curregs[R5]) {
727 uap->curregs[R5] = new_reg;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700728 write_zsreg(uap, R5, uap->curregs[R5]);
729 }
730
731 spin_unlock_irqrestore(&port->lock, flags);
732}
733
Finn Thainec9cbe02009-11-17 20:04:44 +1100734#ifdef CONFIG_PPC_PMAC
735
Linus Torvalds1da177e2005-04-16 15:20:36 -0700736/*
737 * Turn power on or off to the SCC and associated stuff
738 * (port drivers, modem, IR port, etc.)
739 * Returns the number of milliseconds we should wait before
740 * trying to use the port.
741 */
742static int pmz_set_scc_power(struct uart_pmac_port *uap, int state)
743{
744 int delay = 0;
745 int rc;
746
747 if (state) {
748 rc = pmac_call_feature(
749 PMAC_FTR_SCC_ENABLE, uap->node, uap->port_type, 1);
750 pmz_debug("port power on result: %d\n", rc);
751 if (ZS_IS_INTMODEM(uap)) {
752 rc = pmac_call_feature(
753 PMAC_FTR_MODEM_ENABLE, uap->node, 0, 1);
754 delay = 2500; /* wait for 2.5s before using */
755 pmz_debug("modem power result: %d\n", rc);
756 }
757 } else {
758 /* TODO: Make that depend on a timer, don't power down
759 * immediately
760 */
761 if (ZS_IS_INTMODEM(uap)) {
762 rc = pmac_call_feature(
763 PMAC_FTR_MODEM_ENABLE, uap->node, 0, 0);
764 pmz_debug("port power off result: %d\n", rc);
765 }
766 pmac_call_feature(PMAC_FTR_SCC_ENABLE, uap->node, uap->port_type, 0);
767 }
768 return delay;
769}
770
Finn Thainec9cbe02009-11-17 20:04:44 +1100771#else
772
773static int pmz_set_scc_power(struct uart_pmac_port *uap, int state)
774{
775 return 0;
776}
777
778#endif /* !CONFIG_PPC_PMAC */
779
Linus Torvalds1da177e2005-04-16 15:20:36 -0700780/*
Lucas De Marchi25985ed2011-03-30 22:57:33 -0300781 * FixZeroBug....Works around a bug in the SCC receiving channel.
Linus Torvalds1da177e2005-04-16 15:20:36 -0700782 * Inspired from Darwin code, 15 Sept. 2000 -DanM
783 *
784 * The following sequence prevents a problem that is seen with O'Hare ASICs
785 * (most versions -- also with some Heathrow and Hydra ASICs) where a zero
786 * at the input to the receiver becomes 'stuck' and locks up the receiver.
787 * This problem can occur as a result of a zero bit at the receiver input
788 * coincident with any of the following events:
789 *
790 * The SCC is initialized (hardware or software).
791 * A framing error is detected.
792 * The clocking option changes from synchronous or X1 asynchronous
793 * clocking to X16, X32, or X64 asynchronous clocking.
794 * The decoding mode is changed among NRZ, NRZI, FM0, or FM1.
795 *
796 * This workaround attempts to recover from the lockup condition by placing
797 * the SCC in synchronous loopback mode with a fast clock before programming
798 * any of the asynchronous modes.
799 */
800static void pmz_fix_zero_bug_scc(struct uart_pmac_port *uap)
801{
802 write_zsreg(uap, 9, ZS_IS_CHANNEL_A(uap) ? CHRA : CHRB);
803 zssync(uap);
804 udelay(10);
805 write_zsreg(uap, 9, (ZS_IS_CHANNEL_A(uap) ? CHRA : CHRB) | NV);
806 zssync(uap);
807
808 write_zsreg(uap, 4, X1CLK | MONSYNC);
809 write_zsreg(uap, 3, Rx8);
810 write_zsreg(uap, 5, Tx8 | RTS);
811 write_zsreg(uap, 9, NV); /* Didn't we already do this? */
812 write_zsreg(uap, 11, RCBR | TCBR);
813 write_zsreg(uap, 12, 0);
814 write_zsreg(uap, 13, 0);
815 write_zsreg(uap, 14, (LOOPBAK | BRSRC));
816 write_zsreg(uap, 14, (LOOPBAK | BRSRC | BRENAB));
817 write_zsreg(uap, 3, Rx8 | RxENABLE);
818 write_zsreg(uap, 0, RES_EXT_INT);
819 write_zsreg(uap, 0, RES_EXT_INT);
820 write_zsreg(uap, 0, RES_EXT_INT); /* to kill some time */
821
822 /* The channel should be OK now, but it is probably receiving
823 * loopback garbage.
824 * Switch to asynchronous mode, disable the receiver,
825 * and discard everything in the receive buffer.
826 */
827 write_zsreg(uap, 9, NV);
828 write_zsreg(uap, 4, X16CLK | SB_MASK);
829 write_zsreg(uap, 3, Rx8);
830
831 while (read_zsreg(uap, 0) & Rx_CH_AV) {
832 (void)read_zsreg(uap, 8);
833 write_zsreg(uap, 0, RES_EXT_INT);
834 write_zsreg(uap, 0, ERR_RES);
835 }
836}
837
838/*
839 * Real startup routine, powers up the hardware and sets up
840 * the SCC. Returns a delay in ms where you need to wait before
841 * actually using the port, this is typically the internal modem
842 * powerup delay. This routine expect the lock to be taken.
843 */
844static int __pmz_startup(struct uart_pmac_port *uap)
845{
846 int pwr_delay = 0;
847
848 memset(&uap->curregs, 0, sizeof(uap->curregs));
849
850 /* Power up the SCC & underlying hardware (modem/irda) */
851 pwr_delay = pmz_set_scc_power(uap, 1);
852
853 /* Nice buggy HW ... */
854 pmz_fix_zero_bug_scc(uap);
855
856 /* Reset the channel */
857 uap->curregs[R9] = 0;
858 write_zsreg(uap, 9, ZS_IS_CHANNEL_A(uap) ? CHRA : CHRB);
859 zssync(uap);
860 udelay(10);
861 write_zsreg(uap, 9, 0);
862 zssync(uap);
863
864 /* Clear the interrupt registers */
865 write_zsreg(uap, R1, 0);
866 write_zsreg(uap, R0, ERR_RES);
867 write_zsreg(uap, R0, ERR_RES);
868 write_zsreg(uap, R0, RES_H_IUS);
869 write_zsreg(uap, R0, RES_H_IUS);
870
871 /* Setup some valid baud rate */
872 uap->curregs[R4] = X16CLK | SB1;
873 uap->curregs[R3] = Rx8;
874 uap->curregs[R5] = Tx8 | RTS;
875 if (!ZS_IS_IRDA(uap))
876 uap->curregs[R5] |= DTR;
877 uap->curregs[R12] = 0;
878 uap->curregs[R13] = 0;
879 uap->curregs[R14] = BRENAB;
880
881 /* Clear handshaking, enable BREAK interrupts */
882 uap->curregs[R15] = BRKIE;
883
884 /* Master interrupt enable */
885 uap->curregs[R9] |= NV | MIE;
886
887 pmz_load_zsregs(uap, uap->curregs);
888
889 /* Enable receiver and transmitter. */
890 write_zsreg(uap, R3, uap->curregs[R3] |= RxENABLE);
891 write_zsreg(uap, R5, uap->curregs[R5] |= TxENABLE);
892
893 /* Remember status for DCD/CTS changes */
894 uap->prev_status = read_zsreg(uap, R0);
895
Linus Torvalds1da177e2005-04-16 15:20:36 -0700896 return pwr_delay;
897}
898
899static void pmz_irda_reset(struct uart_pmac_port *uap)
900{
Benjamin Herrenschmidta79dd5a2011-12-15 11:13:03 +1100901 unsigned long flags;
902
903 spin_lock_irqsave(&uap->port.lock, flags);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700904 uap->curregs[R5] |= DTR;
905 write_zsreg(uap, R5, uap->curregs[R5]);
906 zssync(uap);
Benjamin Herrenschmidta79dd5a2011-12-15 11:13:03 +1100907 spin_unlock_irqrestore(&uap->port.lock, flags);
908 msleep(110);
909
910 spin_lock_irqsave(&uap->port.lock, flags);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700911 uap->curregs[R5] &= ~DTR;
912 write_zsreg(uap, R5, uap->curregs[R5]);
913 zssync(uap);
Benjamin Herrenschmidta79dd5a2011-12-15 11:13:03 +1100914 spin_unlock_irqrestore(&uap->port.lock, flags);
915 msleep(10);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700916}
917
918/*
919 * This is the "normal" startup routine, using the above one
920 * wrapped with the lock and doing a schedule delay
921 */
922static int pmz_startup(struct uart_port *port)
923{
924 struct uart_pmac_port *uap = to_pmz(port);
925 unsigned long flags;
926 int pwr_delay = 0;
927
928 pmz_debug("pmz: startup()\n");
929
Linus Torvalds1da177e2005-04-16 15:20:36 -0700930 uap->flags |= PMACZILOG_FLAG_IS_OPEN;
931
932 /* A console is never powered down. Else, power up and
933 * initialize the chip
934 */
935 if (!ZS_IS_CONS(uap)) {
936 spin_lock_irqsave(&port->lock, flags);
937 pwr_delay = __pmz_startup(uap);
938 spin_unlock_irqrestore(&port->lock, flags);
939 }
Benjamin Herrenschmidta79dd5a2011-12-15 11:13:03 +1100940 sprintf(uap->irq_name, PMACZILOG_NAME"%d", uap->port.line);
Finn Thainec9cbe02009-11-17 20:04:44 +1100941 if (request_irq(uap->port.irq, pmz_interrupt, IRQF_SHARED,
Benjamin Herrenschmidta79dd5a2011-12-15 11:13:03 +1100942 uap->irq_name, uap)) {
Finn Thainec9cbe02009-11-17 20:04:44 +1100943 pmz_error("Unable to register zs interrupt handler.\n");
Linus Torvalds1da177e2005-04-16 15:20:36 -0700944 pmz_set_scc_power(uap, 0);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700945 return -ENXIO;
946 }
947
Linus Torvalds1da177e2005-04-16 15:20:36 -0700948 /* Right now, we deal with delay by blocking here, I'll be
949 * smarter later on
950 */
951 if (pwr_delay != 0) {
952 pmz_debug("pmz: delaying %d ms\n", pwr_delay);
953 msleep(pwr_delay);
954 }
955
956 /* IrDA reset is done now */
957 if (ZS_IS_IRDA(uap))
958 pmz_irda_reset(uap);
959
Finn Thain7cf82b12011-12-06 17:49:36 +0000960 /* Enable interrupt requests for the channel */
Linus Torvalds1da177e2005-04-16 15:20:36 -0700961 spin_lock_irqsave(&port->lock, flags);
Finn Thain7cf82b12011-12-06 17:49:36 +0000962 pmz_interrupt_control(uap, 1);
Finn Thain1f7b5ff2009-11-04 00:40:23 +1100963 spin_unlock_irqrestore(&port->lock, flags);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700964
965 pmz_debug("pmz: startup() done.\n");
966
967 return 0;
968}
969
970static void pmz_shutdown(struct uart_port *port)
971{
972 struct uart_pmac_port *uap = to_pmz(port);
973 unsigned long flags;
974
975 pmz_debug("pmz: shutdown()\n");
976
Finn Thain7cf82b12011-12-06 17:49:36 +0000977 spin_lock_irqsave(&port->lock, flags);
978
Benjamin Herrenschmidta79dd5a2011-12-15 11:13:03 +1100979 /* Disable interrupt requests for the channel */
980 pmz_interrupt_control(uap, 0);
Finn Thain7cf82b12011-12-06 17:49:36 +0000981
Benjamin Herrenschmidta79dd5a2011-12-15 11:13:03 +1100982 if (!ZS_IS_CONS(uap)) {
983 /* Disable receiver and transmitter */
984 uap->curregs[R3] &= ~RxENABLE;
985 uap->curregs[R5] &= ~TxENABLE;
Finn Thain7cf82b12011-12-06 17:49:36 +0000986
Benjamin Herrenschmidta79dd5a2011-12-15 11:13:03 +1100987 /* Disable break assertion */
988 uap->curregs[R5] &= ~SND_BRK;
989 pmz_maybe_update_regs(uap);
Finn Thain7cf82b12011-12-06 17:49:36 +0000990 }
991
992 spin_unlock_irqrestore(&port->lock, flags);
993
Linus Torvalds1da177e2005-04-16 15:20:36 -0700994 /* Release interrupt handler */
Finn Thain1f7b5ff2009-11-04 00:40:23 +1100995 free_irq(uap->port.irq, uap);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700996
997 spin_lock_irqsave(&port->lock, flags);
998
999 uap->flags &= ~PMACZILOG_FLAG_IS_OPEN;
1000
Benjamin Herrenschmidta79dd5a2011-12-15 11:13:03 +11001001 if (!ZS_IS_CONS(uap))
Finn Thain7cf82b12011-12-06 17:49:36 +00001002 pmz_set_scc_power(uap, 0); /* Shut the chip down */
Linus Torvalds1da177e2005-04-16 15:20:36 -07001003
1004 spin_unlock_irqrestore(&port->lock, flags);
1005
Linus Torvalds1da177e2005-04-16 15:20:36 -07001006 pmz_debug("pmz: shutdown() done.\n");
1007}
1008
1009/* Shared by TTY driver and serial console setup. The port lock is held
1010 * and local interrupts are disabled.
1011 */
1012static void pmz_convert_to_zs(struct uart_pmac_port *uap, unsigned int cflag,
1013 unsigned int iflag, unsigned long baud)
1014{
1015 int brg;
1016
Linus Torvalds1da177e2005-04-16 15:20:36 -07001017 /* Switch to external clocking for IrDA high clock rates. That
1018 * code could be re-used for Midi interfaces with different
1019 * multipliers
1020 */
1021 if (baud >= 115200 && ZS_IS_IRDA(uap)) {
1022 uap->curregs[R4] = X1CLK;
1023 uap->curregs[R11] = RCTRxCP | TCTRxCP;
1024 uap->curregs[R14] = 0; /* BRG off */
1025 uap->curregs[R12] = 0;
1026 uap->curregs[R13] = 0;
1027 uap->flags |= PMACZILOG_FLAG_IS_EXTCLK;
1028 } else {
1029 switch (baud) {
1030 case ZS_CLOCK/16: /* 230400 */
1031 uap->curregs[R4] = X16CLK;
1032 uap->curregs[R11] = 0;
1033 uap->curregs[R14] = 0;
1034 break;
1035 case ZS_CLOCK/32: /* 115200 */
1036 uap->curregs[R4] = X32CLK;
1037 uap->curregs[R11] = 0;
1038 uap->curregs[R14] = 0;
1039 break;
1040 default:
1041 uap->curregs[R4] = X16CLK;
1042 uap->curregs[R11] = TCBR | RCBR;
1043 brg = BPS_TO_BRG(baud, ZS_CLOCK / 16);
1044 uap->curregs[R12] = (brg & 255);
1045 uap->curregs[R13] = ((brg >> 8) & 255);
1046 uap->curregs[R14] = BRENAB;
1047 }
1048 uap->flags &= ~PMACZILOG_FLAG_IS_EXTCLK;
1049 }
1050
1051 /* Character size, stop bits, and parity. */
1052 uap->curregs[3] &= ~RxN_MASK;
1053 uap->curregs[5] &= ~TxN_MASK;
1054
1055 switch (cflag & CSIZE) {
1056 case CS5:
1057 uap->curregs[3] |= Rx5;
1058 uap->curregs[5] |= Tx5;
1059 uap->parity_mask = 0x1f;
1060 break;
1061 case CS6:
1062 uap->curregs[3] |= Rx6;
1063 uap->curregs[5] |= Tx6;
1064 uap->parity_mask = 0x3f;
1065 break;
1066 case CS7:
1067 uap->curregs[3] |= Rx7;
1068 uap->curregs[5] |= Tx7;
1069 uap->parity_mask = 0x7f;
1070 break;
1071 case CS8:
1072 default:
1073 uap->curregs[3] |= Rx8;
1074 uap->curregs[5] |= Tx8;
1075 uap->parity_mask = 0xff;
1076 break;
Joe Perchesfc8114722013-10-08 16:14:21 -07001077 }
Linus Torvalds1da177e2005-04-16 15:20:36 -07001078 uap->curregs[4] &= ~(SB_MASK);
1079 if (cflag & CSTOPB)
1080 uap->curregs[4] |= SB2;
1081 else
1082 uap->curregs[4] |= SB1;
1083 if (cflag & PARENB)
1084 uap->curregs[4] |= PAR_ENAB;
1085 else
1086 uap->curregs[4] &= ~PAR_ENAB;
1087 if (!(cflag & PARODD))
1088 uap->curregs[4] |= PAR_EVEN;
1089 else
1090 uap->curregs[4] &= ~PAR_EVEN;
1091
1092 uap->port.read_status_mask = Rx_OVR;
1093 if (iflag & INPCK)
1094 uap->port.read_status_mask |= CRC_ERR | PAR_ERR;
1095 if (iflag & (BRKINT | PARMRK))
1096 uap->port.read_status_mask |= BRK_ABRT;
1097
1098 uap->port.ignore_status_mask = 0;
1099 if (iflag & IGNPAR)
1100 uap->port.ignore_status_mask |= CRC_ERR | PAR_ERR;
1101 if (iflag & IGNBRK) {
1102 uap->port.ignore_status_mask |= BRK_ABRT;
1103 if (iflag & IGNPAR)
1104 uap->port.ignore_status_mask |= Rx_OVR;
1105 }
1106
1107 if ((cflag & CREAD) == 0)
1108 uap->port.ignore_status_mask = 0xff;
1109}
1110
1111
1112/*
1113 * Set the irda codec on the imac to the specified baud rate.
1114 */
1115static void pmz_irda_setup(struct uart_pmac_port *uap, unsigned long *baud)
1116{
1117 u8 cmdbyte;
1118 int t, version;
1119
1120 switch (*baud) {
1121 /* SIR modes */
1122 case 2400:
1123 cmdbyte = 0x53;
1124 break;
1125 case 4800:
1126 cmdbyte = 0x52;
1127 break;
1128 case 9600:
1129 cmdbyte = 0x51;
1130 break;
1131 case 19200:
1132 cmdbyte = 0x50;
1133 break;
1134 case 38400:
1135 cmdbyte = 0x4f;
1136 break;
1137 case 57600:
1138 cmdbyte = 0x4e;
1139 break;
1140 case 115200:
1141 cmdbyte = 0x4d;
1142 break;
1143 /* The FIR modes aren't really supported at this point, how
1144 * do we select the speed ? via the FCR on KeyLargo ?
1145 */
1146 case 1152000:
1147 cmdbyte = 0;
1148 break;
1149 case 4000000:
1150 cmdbyte = 0;
1151 break;
1152 default: /* 9600 */
1153 cmdbyte = 0x51;
1154 *baud = 9600;
1155 break;
1156 }
1157
1158 /* Wait for transmitter to drain */
1159 t = 10000;
1160 while ((read_zsreg(uap, R0) & Tx_BUF_EMP) == 0
1161 || (read_zsreg(uap, R1) & ALL_SNT) == 0) {
1162 if (--t <= 0) {
Finn Thainec9cbe02009-11-17 20:04:44 +11001163 pmz_error("transmitter didn't drain\n");
Linus Torvalds1da177e2005-04-16 15:20:36 -07001164 return;
1165 }
1166 udelay(10);
1167 }
1168
1169 /* Drain the receiver too */
1170 t = 100;
1171 (void)read_zsdata(uap);
1172 (void)read_zsdata(uap);
1173 (void)read_zsdata(uap);
1174 mdelay(10);
1175 while (read_zsreg(uap, R0) & Rx_CH_AV) {
1176 read_zsdata(uap);
1177 mdelay(10);
1178 if (--t <= 0) {
Finn Thainec9cbe02009-11-17 20:04:44 +11001179 pmz_error("receiver didn't drain\n");
Linus Torvalds1da177e2005-04-16 15:20:36 -07001180 return;
1181 }
1182 }
1183
1184 /* Switch to command mode */
1185 uap->curregs[R5] |= DTR;
1186 write_zsreg(uap, R5, uap->curregs[R5]);
1187 zssync(uap);
Finn Thain1f7b5ff2009-11-04 00:40:23 +11001188 mdelay(1);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001189
1190 /* Switch SCC to 19200 */
1191 pmz_convert_to_zs(uap, CS8, 0, 19200);
1192 pmz_load_zsregs(uap, uap->curregs);
Finn Thain1f7b5ff2009-11-04 00:40:23 +11001193 mdelay(1);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001194
1195 /* Write get_version command byte */
1196 write_zsdata(uap, 1);
1197 t = 5000;
1198 while ((read_zsreg(uap, R0) & Rx_CH_AV) == 0) {
1199 if (--t <= 0) {
Finn Thainec9cbe02009-11-17 20:04:44 +11001200 pmz_error("irda_setup timed out on get_version byte\n");
Linus Torvalds1da177e2005-04-16 15:20:36 -07001201 goto out;
1202 }
1203 udelay(10);
1204 }
1205 version = read_zsdata(uap);
1206
1207 if (version < 4) {
Finn Thainec9cbe02009-11-17 20:04:44 +11001208 pmz_info("IrDA: dongle version %d not supported\n", version);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001209 goto out;
1210 }
1211
1212 /* Send speed mode */
1213 write_zsdata(uap, cmdbyte);
1214 t = 5000;
1215 while ((read_zsreg(uap, R0) & Rx_CH_AV) == 0) {
1216 if (--t <= 0) {
Finn Thainec9cbe02009-11-17 20:04:44 +11001217 pmz_error("irda_setup timed out on speed mode byte\n");
Linus Torvalds1da177e2005-04-16 15:20:36 -07001218 goto out;
1219 }
1220 udelay(10);
1221 }
1222 t = read_zsdata(uap);
1223 if (t != cmdbyte)
Finn Thainec9cbe02009-11-17 20:04:44 +11001224 pmz_error("irda_setup speed mode byte = %x (%x)\n", t, cmdbyte);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001225
Finn Thainec9cbe02009-11-17 20:04:44 +11001226 pmz_info("IrDA setup for %ld bps, dongle version: %d\n",
Linus Torvalds1da177e2005-04-16 15:20:36 -07001227 *baud, version);
1228
1229 (void)read_zsdata(uap);
1230 (void)read_zsdata(uap);
1231 (void)read_zsdata(uap);
1232
1233 out:
1234 /* Switch back to data mode */
1235 uap->curregs[R5] &= ~DTR;
1236 write_zsreg(uap, R5, uap->curregs[R5]);
1237 zssync(uap);
1238
1239 (void)read_zsdata(uap);
1240 (void)read_zsdata(uap);
1241 (void)read_zsdata(uap);
1242}
1243
1244
Alan Cox606d0992006-12-08 02:38:45 -08001245static void __pmz_set_termios(struct uart_port *port, struct ktermios *termios,
1246 struct ktermios *old)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001247{
1248 struct uart_pmac_port *uap = to_pmz(port);
1249 unsigned long baud;
1250
1251 pmz_debug("pmz: set_termios()\n");
1252
Alan Cox606d0992006-12-08 02:38:45 -08001253 memcpy(&uap->termios_cache, termios, sizeof(struct ktermios));
Linus Torvalds1da177e2005-04-16 15:20:36 -07001254
1255 /* XXX Check which revs of machines actually allow 1 and 4Mb speeds
1256 * on the IR dongle. Note that the IRTTY driver currently doesn't know
1257 * about the FIR mode and high speed modes. So these are unused. For
1258 * implementing proper support for these, we should probably add some
1259 * DMA as well, at least on the Rx side, which isn't a simple thing
1260 * at this point.
1261 */
1262 if (ZS_IS_IRDA(uap)) {
1263 /* Calc baud rate */
1264 baud = uart_get_baud_rate(port, termios, old, 1200, 4000000);
1265 pmz_debug("pmz: switch IRDA to %ld bauds\n", baud);
1266 /* Cet the irda codec to the right rate */
1267 pmz_irda_setup(uap, &baud);
1268 /* Set final baud rate */
1269 pmz_convert_to_zs(uap, termios->c_cflag, termios->c_iflag, baud);
1270 pmz_load_zsregs(uap, uap->curregs);
1271 zssync(uap);
1272 } else {
1273 baud = uart_get_baud_rate(port, termios, old, 1200, 230400);
1274 pmz_convert_to_zs(uap, termios->c_cflag, termios->c_iflag, baud);
1275 /* Make sure modem status interrupts are correctly configured */
1276 if (UART_ENABLE_MS(&uap->port, termios->c_cflag)) {
1277 uap->curregs[R15] |= DCDIE | SYNCIE | CTSIE;
1278 uap->flags |= PMACZILOG_FLAG_MODEM_STATUS;
1279 } else {
1280 uap->curregs[R15] &= ~(DCDIE | SYNCIE | CTSIE);
1281 uap->flags &= ~PMACZILOG_FLAG_MODEM_STATUS;
1282 }
1283
1284 /* Load registers to the chip */
1285 pmz_maybe_update_regs(uap);
1286 }
1287 uart_update_timeout(port, termios->c_cflag, baud);
1288
1289 pmz_debug("pmz: set_termios() done.\n");
1290}
1291
1292/* The port lock is not held. */
Alan Cox606d0992006-12-08 02:38:45 -08001293static void pmz_set_termios(struct uart_port *port, struct ktermios *termios,
1294 struct ktermios *old)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001295{
1296 struct uart_pmac_port *uap = to_pmz(port);
1297 unsigned long flags;
1298
1299 spin_lock_irqsave(&port->lock, flags);
1300
1301 /* Disable IRQs on the port */
Finn Thain7cf82b12011-12-06 17:49:36 +00001302 pmz_interrupt_control(uap, 0);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001303
1304 /* Setup new port configuration */
1305 __pmz_set_termios(port, termios, old);
1306
1307 /* Re-enable IRQs on the port */
Finn Thain7cf82b12011-12-06 17:49:36 +00001308 if (ZS_IS_OPEN(uap))
1309 pmz_interrupt_control(uap, 1);
1310
Linus Torvalds1da177e2005-04-16 15:20:36 -07001311 spin_unlock_irqrestore(&port->lock, flags);
1312}
1313
1314static const char *pmz_type(struct uart_port *port)
1315{
1316 struct uart_pmac_port *uap = to_pmz(port);
1317
1318 if (ZS_IS_IRDA(uap))
1319 return "Z85c30 ESCC - Infrared port";
1320 else if (ZS_IS_INTMODEM(uap))
1321 return "Z85c30 ESCC - Internal modem";
1322 return "Z85c30 ESCC - Serial port";
1323}
1324
1325/* We do not request/release mappings of the registers here, this
1326 * happens at early serial probe time.
1327 */
1328static void pmz_release_port(struct uart_port *port)
1329{
1330}
1331
1332static int pmz_request_port(struct uart_port *port)
1333{
1334 return 0;
1335}
1336
1337/* These do not need to do anything interesting either. */
1338static void pmz_config_port(struct uart_port *port, int flags)
1339{
1340}
1341
1342/* We do not support letting the user mess with the divisor, IRQ, etc. */
1343static int pmz_verify_port(struct uart_port *port, struct serial_struct *ser)
1344{
1345 return -EINVAL;
1346}
1347
Chris J Arges8c653182008-11-04 12:19:06 +00001348#ifdef CONFIG_CONSOLE_POLL
1349
1350static int pmz_poll_get_char(struct uart_port *port)
1351{
1352 struct uart_pmac_port *uap = (struct uart_pmac_port *)port;
Jason Wessel38f8eef2012-08-12 07:16:43 -05001353 int tries = 2;
Chris J Arges8c653182008-11-04 12:19:06 +00001354
Jason Wessel38f8eef2012-08-12 07:16:43 -05001355 while (tries) {
1356 if ((read_zsreg(uap, R0) & Rx_CH_AV) != 0)
1357 return read_zsdata(uap);
1358 if (tries--)
1359 udelay(5);
1360 }
1361
1362 return NO_POLL_CHAR;
Chris J Arges8c653182008-11-04 12:19:06 +00001363}
1364
1365static void pmz_poll_put_char(struct uart_port *port, unsigned char c)
1366{
1367 struct uart_pmac_port *uap = (struct uart_pmac_port *)port;
1368
1369 /* Wait for the transmit buffer to empty. */
1370 while ((read_zsreg(uap, R0) & Tx_BUF_EMP) == 0)
1371 udelay(5);
1372 write_zsdata(uap, c);
1373}
1374
Finn Thainec9cbe02009-11-17 20:04:44 +11001375#endif /* CONFIG_CONSOLE_POLL */
Chris J Arges8c653182008-11-04 12:19:06 +00001376
Linus Torvalds1da177e2005-04-16 15:20:36 -07001377static struct uart_ops pmz_pops = {
1378 .tx_empty = pmz_tx_empty,
1379 .set_mctrl = pmz_set_mctrl,
1380 .get_mctrl = pmz_get_mctrl,
1381 .stop_tx = pmz_stop_tx,
1382 .start_tx = pmz_start_tx,
1383 .stop_rx = pmz_stop_rx,
1384 .enable_ms = pmz_enable_ms,
1385 .break_ctl = pmz_break_ctl,
1386 .startup = pmz_startup,
1387 .shutdown = pmz_shutdown,
1388 .set_termios = pmz_set_termios,
1389 .type = pmz_type,
1390 .release_port = pmz_release_port,
1391 .request_port = pmz_request_port,
1392 .config_port = pmz_config_port,
1393 .verify_port = pmz_verify_port,
Chris J Arges8c653182008-11-04 12:19:06 +00001394#ifdef CONFIG_CONSOLE_POLL
1395 .poll_get_char = pmz_poll_get_char,
1396 .poll_put_char = pmz_poll_put_char,
1397#endif
Linus Torvalds1da177e2005-04-16 15:20:36 -07001398};
1399
Finn Thainec9cbe02009-11-17 20:04:44 +11001400#ifdef CONFIG_PPC_PMAC
1401
Linus Torvalds1da177e2005-04-16 15:20:36 -07001402/*
1403 * Setup one port structure after probing, HW is down at this point,
1404 * Unlike sunzilog, we don't need to pre-init the spinlock as we don't
1405 * register our console before uart_add_one_port() is called
1406 */
1407static int __init pmz_init_port(struct uart_pmac_port *uap)
1408{
1409 struct device_node *np = uap->node;
Jeremy Kerr018a3d12006-07-12 15:40:29 +10001410 const char *conn;
1411 const struct slot_names_prop {
Linus Torvalds1da177e2005-04-16 15:20:36 -07001412 int count;
1413 char name[1];
1414 } *slots;
1415 int len;
Benjamin Herrenschmidtcc5d0182005-12-13 18:01:21 +11001416 struct resource r_ports, r_rxdma, r_txdma;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001417
1418 /*
1419 * Request & map chip registers
1420 */
Benjamin Herrenschmidtcc5d0182005-12-13 18:01:21 +11001421 if (of_address_to_resource(np, 0, &r_ports))
1422 return -ENODEV;
1423 uap->port.mapbase = r_ports.start;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001424 uap->port.membase = ioremap(uap->port.mapbase, 0x1000);
Finn Thain1f7b5ff2009-11-04 00:40:23 +11001425
Linus Torvalds1da177e2005-04-16 15:20:36 -07001426 uap->control_reg = uap->port.membase;
1427 uap->data_reg = uap->control_reg + 0x10;
1428
1429 /*
1430 * Request & map DBDMA registers
1431 */
1432#ifdef HAS_DBDMA
Benjamin Herrenschmidtcc5d0182005-12-13 18:01:21 +11001433 if (of_address_to_resource(np, 1, &r_txdma) == 0 &&
1434 of_address_to_resource(np, 2, &r_rxdma) == 0)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001435 uap->flags |= PMACZILOG_FLAG_HAS_DMA;
Benjamin Herrenschmidtcc5d0182005-12-13 18:01:21 +11001436#else
1437 memset(&r_txdma, 0, sizeof(struct resource));
1438 memset(&r_rxdma, 0, sizeof(struct resource));
Linus Torvalds1da177e2005-04-16 15:20:36 -07001439#endif
1440 if (ZS_HAS_DMA(uap)) {
Benjamin Herrenschmidtcc5d0182005-12-13 18:01:21 +11001441 uap->tx_dma_regs = ioremap(r_txdma.start, 0x100);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001442 if (uap->tx_dma_regs == NULL) {
1443 uap->flags &= ~PMACZILOG_FLAG_HAS_DMA;
1444 goto no_dma;
1445 }
Benjamin Herrenschmidtcc5d0182005-12-13 18:01:21 +11001446 uap->rx_dma_regs = ioremap(r_rxdma.start, 0x100);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001447 if (uap->rx_dma_regs == NULL) {
1448 iounmap(uap->tx_dma_regs);
1449 uap->tx_dma_regs = NULL;
1450 uap->flags &= ~PMACZILOG_FLAG_HAS_DMA;
1451 goto no_dma;
1452 }
Benjamin Herrenschmidt0ebfff12006-07-03 21:36:01 +10001453 uap->tx_dma_irq = irq_of_parse_and_map(np, 1);
1454 uap->rx_dma_irq = irq_of_parse_and_map(np, 2);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001455 }
1456no_dma:
1457
1458 /*
1459 * Detect port type
1460 */
Stephen Rothwell55b61fe2007-05-03 17:26:52 +10001461 if (of_device_is_compatible(np, "cobalt"))
Linus Torvalds1da177e2005-04-16 15:20:36 -07001462 uap->flags |= PMACZILOG_FLAG_IS_INTMODEM;
Stephen Rothwell40cd3a42007-05-01 13:54:02 +10001463 conn = of_get_property(np, "AAPL,connector", &len);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001464 if (conn && (strcmp(conn, "infrared") == 0))
1465 uap->flags |= PMACZILOG_FLAG_IS_IRDA;
1466 uap->port_type = PMAC_SCC_ASYNC;
1467 /* 1999 Powerbook G3 has slot-names property instead */
Stephen Rothwell40cd3a42007-05-01 13:54:02 +10001468 slots = of_get_property(np, "slot-names", &len);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001469 if (slots && slots->count > 0) {
1470 if (strcmp(slots->name, "IrDA") == 0)
1471 uap->flags |= PMACZILOG_FLAG_IS_IRDA;
1472 else if (strcmp(slots->name, "Modem") == 0)
1473 uap->flags |= PMACZILOG_FLAG_IS_INTMODEM;
1474 }
1475 if (ZS_IS_IRDA(uap))
1476 uap->port_type = PMAC_SCC_IRDA;
1477 if (ZS_IS_INTMODEM(uap)) {
Stephen Rothwell30686ba2007-04-24 13:53:04 +10001478 struct device_node* i2c_modem =
1479 of_find_node_by_name(NULL, "i2c-modem");
Linus Torvalds1da177e2005-04-16 15:20:36 -07001480 if (i2c_modem) {
Jeremy Kerr018a3d12006-07-12 15:40:29 +10001481 const char* mid =
Stephen Rothwell40cd3a42007-05-01 13:54:02 +10001482 of_get_property(i2c_modem, "modem-id", NULL);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001483 if (mid) switch(*mid) {
1484 case 0x04 :
1485 case 0x05 :
1486 case 0x07 :
1487 case 0x08 :
1488 case 0x0b :
1489 case 0x0c :
1490 uap->port_type = PMAC_SCC_I2S1;
1491 }
1492 printk(KERN_INFO "pmac_zilog: i2c-modem detected, id: %d\n",
1493 mid ? (*mid) : 0);
Stephen Rothwell30686ba2007-04-24 13:53:04 +10001494 of_node_put(i2c_modem);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001495 } else {
1496 printk(KERN_INFO "pmac_zilog: serial modem detected\n");
1497 }
1498 }
1499
1500 /*
1501 * Init remaining bits of "port" structure
1502 */
Russell King9b4a1612006-02-05 10:48:10 +00001503 uap->port.iotype = UPIO_MEM;
Benjamin Herrenschmidt0ebfff12006-07-03 21:36:01 +10001504 uap->port.irq = irq_of_parse_and_map(np, 0);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001505 uap->port.uartclk = ZS_CLOCK;
1506 uap->port.fifosize = 1;
1507 uap->port.ops = &pmz_pops;
1508 uap->port.type = PORT_PMAC_ZILOG;
1509 uap->port.flags = 0;
1510
Benjamin Herrenschmidtf08b7e92009-03-30 17:34:04 +00001511 /*
1512 * Fixup for the port on Gatwick for which the device-tree has
1513 * missing interrupts. Normally, the macio_dev would contain
1514 * fixed up interrupt info, but we use the device-tree directly
1515 * here due to early probing so we need the fixup too.
1516 */
Alan Coxd4e33fa2012-01-26 17:44:09 +00001517 if (uap->port.irq == 0 &&
Benjamin Herrenschmidtf08b7e92009-03-30 17:34:04 +00001518 np->parent && np->parent->parent &&
1519 of_device_is_compatible(np->parent->parent, "gatwick")) {
1520 /* IRQs on gatwick are offset by 64 */
1521 uap->port.irq = irq_create_mapping(NULL, 64 + 15);
1522 uap->tx_dma_irq = irq_create_mapping(NULL, 64 + 4);
1523 uap->rx_dma_irq = irq_create_mapping(NULL, 64 + 5);
1524 }
1525
Linus Torvalds1da177e2005-04-16 15:20:36 -07001526 /* Setup some valid baud rate information in the register
1527 * shadows so we don't write crap there before baud rate is
1528 * first initialized.
1529 */
1530 pmz_convert_to_zs(uap, CS8, 0, 9600);
1531
1532 return 0;
1533}
1534
1535/*
1536 * Get rid of a port on module removal
1537 */
1538static void pmz_dispose_port(struct uart_pmac_port *uap)
1539{
1540 struct device_node *np;
1541
1542 np = uap->node;
1543 iounmap(uap->rx_dma_regs);
1544 iounmap(uap->tx_dma_regs);
1545 iounmap(uap->control_reg);
1546 uap->node = NULL;
1547 of_node_put(np);
1548 memset(uap, 0, sizeof(struct uart_pmac_port));
1549}
1550
1551/*
Finn Thain1f7b5ff2009-11-04 00:40:23 +11001552 * Called upon match with an escc node in the device-tree.
Linus Torvalds1da177e2005-04-16 15:20:36 -07001553 */
Jeff Mahoney5e655772005-07-06 15:44:41 -04001554static int pmz_attach(struct macio_dev *mdev, const struct of_device_id *match)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001555{
Benjamin Herrenschmidta79dd5a2011-12-15 11:13:03 +11001556 struct uart_pmac_port *uap;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001557 int i;
1558
1559 /* Iterate the pmz_ports array to find a matching entry
1560 */
1561 for (i = 0; i < MAX_ZS_PORTS; i++)
Benjamin Herrenschmidta79dd5a2011-12-15 11:13:03 +11001562 if (pmz_ports[i].node == mdev->ofdev.dev.of_node)
1563 break;
1564 if (i >= MAX_ZS_PORTS)
1565 return -ENODEV;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001566
Benjamin Herrenschmidta79dd5a2011-12-15 11:13:03 +11001567
1568 uap = &pmz_ports[i];
1569 uap->dev = mdev;
1570 uap->port.dev = &mdev->ofdev.dev;
1571 dev_set_drvdata(&mdev->ofdev.dev, uap);
1572
1573 /* We still activate the port even when failing to request resources
1574 * to work around bugs in ancient Apple device-trees
1575 */
1576 if (macio_request_resources(uap->dev, "pmac_zilog"))
1577 printk(KERN_WARNING "%s: Failed to request resource"
1578 ", port still active\n",
1579 uap->node->name);
1580 else
1581 uap->flags |= PMACZILOG_FLAG_RSRC_REQUESTED;
1582
1583 return uart_add_one_port(&pmz_uart_reg, &uap->port);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001584}
1585
1586/*
1587 * That one should not be called, macio isn't really a hotswap device,
1588 * we don't expect one of those serial ports to go away...
1589 */
1590static int pmz_detach(struct macio_dev *mdev)
1591{
1592 struct uart_pmac_port *uap = dev_get_drvdata(&mdev->ofdev.dev);
1593
1594 if (!uap)
1595 return -ENODEV;
1596
Benjamin Herrenschmidta79dd5a2011-12-15 11:13:03 +11001597 uart_remove_one_port(&pmz_uart_reg, &uap->port);
1598
Linus Torvalds1da177e2005-04-16 15:20:36 -07001599 if (uap->flags & PMACZILOG_FLAG_RSRC_REQUESTED) {
1600 macio_release_resources(uap->dev);
1601 uap->flags &= ~PMACZILOG_FLAG_RSRC_REQUESTED;
1602 }
1603 dev_set_drvdata(&mdev->ofdev.dev, NULL);
1604 uap->dev = NULL;
Benjamin Herrenschmidta79dd5a2011-12-15 11:13:03 +11001605 uap->port.dev = NULL;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001606
1607 return 0;
1608}
1609
1610
Pavel Machek0370aff2005-04-16 15:25:35 -07001611static int pmz_suspend(struct macio_dev *mdev, pm_message_t pm_state)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001612{
1613 struct uart_pmac_port *uap = dev_get_drvdata(&mdev->ofdev.dev);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001614
1615 if (uap == NULL) {
1616 printk("HRM... pmz_suspend with NULL uap\n");
1617 return 0;
1618 }
1619
Benjamin Herrenschmidta79dd5a2011-12-15 11:13:03 +11001620 uart_suspend_port(&pmz_uart_reg, &uap->port);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001621
1622 return 0;
1623}
1624
1625
1626static int pmz_resume(struct macio_dev *mdev)
1627{
1628 struct uart_pmac_port *uap = dev_get_drvdata(&mdev->ofdev.dev);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001629
1630 if (uap == NULL)
1631 return 0;
1632
Benjamin Herrenschmidta79dd5a2011-12-15 11:13:03 +11001633 uart_resume_port(&pmz_uart_reg, &uap->port);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001634
1635 return 0;
1636}
1637
1638/*
1639 * Probe all ports in the system and build the ports array, we register
Benjamin Herrenschmidta79dd5a2011-12-15 11:13:03 +11001640 * with the serial layer later, so we get a proper struct device which
1641 * allows the tty to attach properly. This is later than it used to be
1642 * but the tty layer really wants it that way.
Linus Torvalds1da177e2005-04-16 15:20:36 -07001643 */
1644static int __init pmz_probe(void)
1645{
1646 struct device_node *node_p, *node_a, *node_b, *np;
1647 int count = 0;
1648 int rc;
1649
1650 /*
1651 * Find all escc chips in the system
1652 */
1653 node_p = of_find_node_by_name(NULL, "escc");
1654 while (node_p) {
1655 /*
1656 * First get channel A/B node pointers
1657 *
1658 * TODO: Add routines with proper locking to do that...
1659 */
1660 node_a = node_b = NULL;
1661 for (np = NULL; (np = of_get_next_child(node_p, np)) != NULL;) {
1662 if (strncmp(np->name, "ch-a", 4) == 0)
1663 node_a = of_node_get(np);
1664 else if (strncmp(np->name, "ch-b", 4) == 0)
1665 node_b = of_node_get(np);
1666 }
1667 if (!node_a && !node_b) {
1668 of_node_put(node_a);
1669 of_node_put(node_b);
1670 printk(KERN_ERR "pmac_zilog: missing node %c for escc %s\n",
1671 (!node_a) ? 'a' : 'b', node_p->full_name);
1672 goto next;
1673 }
1674
1675 /*
1676 * Fill basic fields in the port structures
1677 */
Benjamin Herrenschmidta79dd5a2011-12-15 11:13:03 +11001678 if (node_b != NULL) {
1679 pmz_ports[count].mate = &pmz_ports[count+1];
1680 pmz_ports[count+1].mate = &pmz_ports[count];
1681 }
Linus Torvalds1da177e2005-04-16 15:20:36 -07001682 pmz_ports[count].flags = PMACZILOG_FLAG_IS_CHANNEL_A;
1683 pmz_ports[count].node = node_a;
1684 pmz_ports[count+1].node = node_b;
1685 pmz_ports[count].port.line = count;
Finn Thain1f7b5ff2009-11-04 00:40:23 +11001686 pmz_ports[count+1].port.line = count+1;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001687
1688 /*
1689 * Setup the ports for real
1690 */
1691 rc = pmz_init_port(&pmz_ports[count]);
1692 if (rc == 0 && node_b != NULL)
1693 rc = pmz_init_port(&pmz_ports[count+1]);
1694 if (rc != 0) {
1695 of_node_put(node_a);
1696 of_node_put(node_b);
1697 memset(&pmz_ports[count], 0, sizeof(struct uart_pmac_port));
1698 memset(&pmz_ports[count+1], 0, sizeof(struct uart_pmac_port));
1699 goto next;
1700 }
1701 count += 2;
1702next:
1703 node_p = of_find_node_by_name(node_p, "escc");
1704 }
1705 pmz_ports_count = count;
1706
1707 return 0;
1708}
1709
Finn Thainec9cbe02009-11-17 20:04:44 +11001710#else
1711
1712extern struct platform_device scc_a_pdev, scc_b_pdev;
1713
1714static int __init pmz_init_port(struct uart_pmac_port *uap)
1715{
1716 struct resource *r_ports;
1717 int irq;
1718
Benjamin Herrenschmidta79dd5a2011-12-15 11:13:03 +11001719 r_ports = platform_get_resource(uap->pdev, IORESOURCE_MEM, 0);
1720 irq = platform_get_irq(uap->pdev, 0);
Finn Thainec9cbe02009-11-17 20:04:44 +11001721 if (!r_ports || !irq)
1722 return -ENODEV;
1723
1724 uap->port.mapbase = r_ports->start;
1725 uap->port.membase = (unsigned char __iomem *) r_ports->start;
1726 uap->port.iotype = UPIO_MEM;
1727 uap->port.irq = irq;
1728 uap->port.uartclk = ZS_CLOCK;
1729 uap->port.fifosize = 1;
1730 uap->port.ops = &pmz_pops;
1731 uap->port.type = PORT_PMAC_ZILOG;
1732 uap->port.flags = 0;
1733
1734 uap->control_reg = uap->port.membase;
1735 uap->data_reg = uap->control_reg + 4;
1736 uap->port_type = 0;
1737
1738 pmz_convert_to_zs(uap, CS8, 0, 9600);
1739
1740 return 0;
1741}
1742
1743static int __init pmz_probe(void)
1744{
1745 int err;
1746
1747 pmz_ports_count = 0;
1748
Finn Thainec9cbe02009-11-17 20:04:44 +11001749 pmz_ports[0].port.line = 0;
1750 pmz_ports[0].flags = PMACZILOG_FLAG_IS_CHANNEL_A;
Benjamin Herrenschmidta79dd5a2011-12-15 11:13:03 +11001751 pmz_ports[0].pdev = &scc_a_pdev;
Finn Thainec9cbe02009-11-17 20:04:44 +11001752 err = pmz_init_port(&pmz_ports[0]);
1753 if (err)
1754 return err;
1755 pmz_ports_count++;
1756
Benjamin Herrenschmidta79dd5a2011-12-15 11:13:03 +11001757 pmz_ports[0].mate = &pmz_ports[1];
Finn Thainec9cbe02009-11-17 20:04:44 +11001758 pmz_ports[1].mate = &pmz_ports[0];
1759 pmz_ports[1].port.line = 1;
1760 pmz_ports[1].flags = 0;
Benjamin Herrenschmidta79dd5a2011-12-15 11:13:03 +11001761 pmz_ports[1].pdev = &scc_b_pdev;
Finn Thainec9cbe02009-11-17 20:04:44 +11001762 err = pmz_init_port(&pmz_ports[1]);
1763 if (err)
1764 return err;
1765 pmz_ports_count++;
1766
1767 return 0;
1768}
1769
1770static void pmz_dispose_port(struct uart_pmac_port *uap)
1771{
1772 memset(uap, 0, sizeof(struct uart_pmac_port));
1773}
1774
1775static int __init pmz_attach(struct platform_device *pdev)
1776{
Benjamin Herrenschmidta79dd5a2011-12-15 11:13:03 +11001777 struct uart_pmac_port *uap;
Finn Thainec9cbe02009-11-17 20:04:44 +11001778 int i;
1779
Benjamin Herrenschmidta79dd5a2011-12-15 11:13:03 +11001780 /* Iterate the pmz_ports array to find a matching entry */
Finn Thainec9cbe02009-11-17 20:04:44 +11001781 for (i = 0; i < pmz_ports_count; i++)
Benjamin Herrenschmidta79dd5a2011-12-15 11:13:03 +11001782 if (pmz_ports[i].pdev == pdev)
1783 break;
1784 if (i >= pmz_ports_count)
1785 return -ENODEV;
1786
1787 uap = &pmz_ports[i];
1788 uap->port.dev = &pdev->dev;
1789 platform_set_drvdata(pdev, uap);
1790
1791 return uart_add_one_port(&pmz_uart_reg, &uap->port);
Finn Thainec9cbe02009-11-17 20:04:44 +11001792}
1793
1794static int __exit pmz_detach(struct platform_device *pdev)
1795{
Benjamin Herrenschmidta79dd5a2011-12-15 11:13:03 +11001796 struct uart_pmac_port *uap = platform_get_drvdata(pdev);
1797
1798 if (!uap)
1799 return -ENODEV;
1800
1801 uart_remove_one_port(&pmz_uart_reg, &uap->port);
1802
Benjamin Herrenschmidta79dd5a2011-12-15 11:13:03 +11001803 uap->port.dev = NULL;
1804
Finn Thainec9cbe02009-11-17 20:04:44 +11001805 return 0;
1806}
1807
1808#endif /* !CONFIG_PPC_PMAC */
1809
Linus Torvalds1da177e2005-04-16 15:20:36 -07001810#ifdef CONFIG_SERIAL_PMACZILOG_CONSOLE
1811
1812static void pmz_console_write(struct console *con, const char *s, unsigned int count);
1813static int __init pmz_console_setup(struct console *co, char *options);
1814
1815static struct console pmz_console = {
David Woodhousee4533b22007-04-05 00:19:43 +10001816 .name = PMACZILOG_NAME,
Linus Torvalds1da177e2005-04-16 15:20:36 -07001817 .write = pmz_console_write,
1818 .device = uart_console_device,
1819 .setup = pmz_console_setup,
1820 .flags = CON_PRINTBUFFER,
1821 .index = -1,
1822 .data = &pmz_uart_reg,
1823};
1824
1825#define PMACZILOG_CONSOLE &pmz_console
1826#else /* CONFIG_SERIAL_PMACZILOG_CONSOLE */
1827#define PMACZILOG_CONSOLE (NULL)
1828#endif /* CONFIG_SERIAL_PMACZILOG_CONSOLE */
1829
1830/*
1831 * Register the driver, console driver and ports with the serial
1832 * core
1833 */
1834static int __init pmz_register(void)
1835{
Linus Torvalds1da177e2005-04-16 15:20:36 -07001836 pmz_uart_reg.nr = pmz_ports_count;
1837 pmz_uart_reg.cons = PMACZILOG_CONSOLE;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001838
1839 /*
1840 * Register this driver with the serial core
1841 */
Benjamin Herrenschmidta79dd5a2011-12-15 11:13:03 +11001842 return uart_register_driver(&pmz_uart_reg);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001843}
1844
Finn Thainec9cbe02009-11-17 20:04:44 +11001845#ifdef CONFIG_PPC_PMAC
1846
Jeff Mahoney5e655772005-07-06 15:44:41 -04001847static struct of_device_id pmz_match[] =
Linus Torvalds1da177e2005-04-16 15:20:36 -07001848{
1849 {
Finn Thain1f7b5ff2009-11-04 00:40:23 +11001850 .name = "ch-a",
Linus Torvalds1da177e2005-04-16 15:20:36 -07001851 },
1852 {
Finn Thain1f7b5ff2009-11-04 00:40:23 +11001853 .name = "ch-b",
Linus Torvalds1da177e2005-04-16 15:20:36 -07001854 },
1855 {},
1856};
Jeff Mahoney5e655772005-07-06 15:44:41 -04001857MODULE_DEVICE_TABLE (of, pmz_match);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001858
Finn Thain1f7b5ff2009-11-04 00:40:23 +11001859static struct macio_driver pmz_driver = {
Benjamin Herrenschmidtc2cdf6a2010-06-02 17:09:18 +10001860 .driver = {
1861 .name = "pmac_zilog",
1862 .owner = THIS_MODULE,
1863 .of_match_table = pmz_match,
1864 },
Linus Torvalds1da177e2005-04-16 15:20:36 -07001865 .probe = pmz_attach,
1866 .remove = pmz_detach,
1867 .suspend = pmz_suspend,
Finn Thain1f7b5ff2009-11-04 00:40:23 +11001868 .resume = pmz_resume,
Linus Torvalds1da177e2005-04-16 15:20:36 -07001869};
1870
Finn Thainec9cbe02009-11-17 20:04:44 +11001871#else
1872
1873static struct platform_driver pmz_driver = {
1874 .remove = __exit_p(pmz_detach),
1875 .driver = {
1876 .name = "scc",
1877 .owner = THIS_MODULE,
1878 },
1879};
1880
1881#endif /* !CONFIG_PPC_PMAC */
1882
Linus Torvalds1da177e2005-04-16 15:20:36 -07001883static int __init init_pmz(void)
1884{
1885 int rc, i;
1886 printk(KERN_INFO "%s\n", version);
1887
1888 /*
1889 * First, we need to do a direct OF-based probe pass. We
1890 * do that because we want serial console up before the
1891 * macio stuffs calls us back, and since that makes it
1892 * easier to pass the proper number of channels to
1893 * uart_register_driver()
1894 */
1895 if (pmz_ports_count == 0)
1896 pmz_probe();
1897
1898 /*
1899 * Bail early if no port found
1900 */
1901 if (pmz_ports_count == 0)
1902 return -ENODEV;
1903
1904 /*
1905 * Now we register with the serial layer
1906 */
1907 rc = pmz_register();
1908 if (rc) {
1909 printk(KERN_ERR
1910 "pmac_zilog: Error registering serial device, disabling pmac_zilog.\n"
1911 "pmac_zilog: Did another serial driver already claim the minors?\n");
1912 /* effectively "pmz_unprobe()" */
1913 for (i=0; i < pmz_ports_count; i++)
1914 pmz_dispose_port(&pmz_ports[i]);
1915 return rc;
1916 }
Finn Thain1f7b5ff2009-11-04 00:40:23 +11001917
Linus Torvalds1da177e2005-04-16 15:20:36 -07001918 /*
1919 * Then we register the macio driver itself
1920 */
Finn Thainec9cbe02009-11-17 20:04:44 +11001921#ifdef CONFIG_PPC_PMAC
Linus Torvalds1da177e2005-04-16 15:20:36 -07001922 return macio_register_driver(&pmz_driver);
Finn Thainec9cbe02009-11-17 20:04:44 +11001923#else
1924 return platform_driver_probe(&pmz_driver, pmz_attach);
1925#endif
Linus Torvalds1da177e2005-04-16 15:20:36 -07001926}
1927
1928static void __exit exit_pmz(void)
1929{
1930 int i;
1931
Finn Thainec9cbe02009-11-17 20:04:44 +11001932#ifdef CONFIG_PPC_PMAC
Linus Torvalds1da177e2005-04-16 15:20:36 -07001933 /* Get rid of macio-driver (detach from macio) */
1934 macio_unregister_driver(&pmz_driver);
Finn Thainec9cbe02009-11-17 20:04:44 +11001935#else
1936 platform_driver_unregister(&pmz_driver);
1937#endif
Linus Torvalds1da177e2005-04-16 15:20:36 -07001938
1939 for (i = 0; i < pmz_ports_count; i++) {
1940 struct uart_pmac_port *uport = &pmz_ports[i];
Benjamin Herrenschmidta79dd5a2011-12-15 11:13:03 +11001941#ifdef CONFIG_PPC_PMAC
1942 if (uport->node != NULL)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001943 pmz_dispose_port(uport);
Benjamin Herrenschmidta79dd5a2011-12-15 11:13:03 +11001944#else
1945 if (uport->pdev != NULL)
1946 pmz_dispose_port(uport);
1947#endif
Linus Torvalds1da177e2005-04-16 15:20:36 -07001948 }
1949 /* Unregister UART driver */
1950 uart_unregister_driver(&pmz_uart_reg);
1951}
1952
1953#ifdef CONFIG_SERIAL_PMACZILOG_CONSOLE
1954
Russell Kingd3587882006-03-20 20:00:09 +00001955static void pmz_console_putchar(struct uart_port *port, int ch)
1956{
1957 struct uart_pmac_port *uap = (struct uart_pmac_port *)port;
1958
1959 /* Wait for the transmit buffer to empty. */
1960 while ((read_zsreg(uap, R0) & Tx_BUF_EMP) == 0)
1961 udelay(5);
1962 write_zsdata(uap, ch);
1963}
1964
Linus Torvalds1da177e2005-04-16 15:20:36 -07001965/*
1966 * Print a string to the serial port trying not to disturb
1967 * any possible real use of the port...
1968 */
1969static void pmz_console_write(struct console *con, const char *s, unsigned int count)
1970{
1971 struct uart_pmac_port *uap = &pmz_ports[con->index];
1972 unsigned long flags;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001973
Linus Torvalds1da177e2005-04-16 15:20:36 -07001974 spin_lock_irqsave(&uap->port.lock, flags);
1975
1976 /* Turn of interrupts and enable the transmitter. */
1977 write_zsreg(uap, R1, uap->curregs[1] & ~TxINT_ENAB);
1978 write_zsreg(uap, R5, uap->curregs[5] | TxENABLE | RTS | DTR);
1979
Russell Kingd3587882006-03-20 20:00:09 +00001980 uart_console_write(&uap->port, s, count, pmz_console_putchar);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001981
1982 /* Restore the values in the registers. */
1983 write_zsreg(uap, R1, uap->curregs[1]);
1984 /* Don't disable the transmitter. */
1985
1986 spin_unlock_irqrestore(&uap->port.lock, flags);
1987}
1988
1989/*
1990 * Setup the serial console
1991 */
1992static int __init pmz_console_setup(struct console *co, char *options)
1993{
1994 struct uart_pmac_port *uap;
1995 struct uart_port *port;
1996 int baud = 38400;
1997 int bits = 8;
1998 int parity = 'n';
1999 int flow = 'n';
2000 unsigned long pwr_delay;
2001
2002 /*
2003 * XServe's default to 57600 bps
2004 */
Grant Likely71a157e2010-02-01 21:34:14 -07002005 if (of_machine_is_compatible("RackMac1,1")
2006 || of_machine_is_compatible("RackMac1,2")
2007 || of_machine_is_compatible("MacRISC4"))
Finn Thain1f7b5ff2009-11-04 00:40:23 +11002008 baud = 57600;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002009
2010 /*
2011 * Check whether an invalid uart number has been specified, and
2012 * if so, search for the first available port that does have
2013 * console support.
2014 */
2015 if (co->index >= pmz_ports_count)
2016 co->index = 0;
2017 uap = &pmz_ports[co->index];
Benjamin Herrenschmidta79dd5a2011-12-15 11:13:03 +11002018#ifdef CONFIG_PPC_PMAC
Linus Torvalds1da177e2005-04-16 15:20:36 -07002019 if (uap->node == NULL)
2020 return -ENODEV;
Benjamin Herrenschmidta79dd5a2011-12-15 11:13:03 +11002021#else
2022 if (uap->pdev == NULL)
2023 return -ENODEV;
2024#endif
Linus Torvalds1da177e2005-04-16 15:20:36 -07002025 port = &uap->port;
2026
2027 /*
2028 * Mark port as beeing a console
2029 */
2030 uap->flags |= PMACZILOG_FLAG_IS_CONS;
2031
2032 /*
2033 * Temporary fix for uart layer who didn't setup the spinlock yet
2034 */
2035 spin_lock_init(&port->lock);
2036
2037 /*
2038 * Enable the hardware
2039 */
2040 pwr_delay = __pmz_startup(uap);
2041 if (pwr_delay)
2042 mdelay(pwr_delay);
2043
2044 if (options)
2045 uart_parse_options(options, &baud, &parity, &bits, &flow);
2046
2047 return uart_set_options(port, co, baud, parity, bits, flow);
2048}
2049
2050static int __init pmz_console_init(void)
2051{
2052 /* Probe ports */
2053 pmz_probe();
2054
Geert Uytterhoevendc1dc2f2013-11-22 16:47:26 +01002055 if (pmz_ports_count == 0)
2056 return -ENODEV;
2057
Linus Torvalds1da177e2005-04-16 15:20:36 -07002058 /* TODO: Autoprobe console based on OF */
2059 /* pmz_console.index = i; */
2060 register_console(&pmz_console);
2061
2062 return 0;
2063
2064}
2065console_initcall(pmz_console_init);
2066#endif /* CONFIG_SERIAL_PMACZILOG_CONSOLE */
2067
2068module_init(init_pmz);
2069module_exit(exit_pmz);