blob: 73440e26834beb8d09cd6b07edb0dd1e8b73208a [file] [log] [blame]
Linus Torvalds1da177e2005-04-16 15:20:36 -07001/*
2 * drivers/serial/sh-sci.c
3 *
4 * SuperH on-chip serial module support. (SCI with no FIFO / with FIFO)
5 *
Paul Mundte108b2c2006-09-27 16:32:13 +09006 * Copyright (C) 2002 - 2006 Paul Mundt
Markus Brunner3ea6bc32007-08-20 08:59:33 +09007 * Modified to support SH7720 SCIF. Markus Brunner, Mark Jonas (Jul 2007).
Linus Torvalds1da177e2005-04-16 15:20:36 -07008 *
9 * based off of the old drivers/char/sh-sci.c by:
10 *
11 * Copyright (C) 1999, 2000 Niibe Yutaka
12 * Copyright (C) 2000 Sugioka Toshinobu
13 * Modified to support multiple serial ports. Stuart Menefy (May 2000).
14 * Modified to support SecureEdge. David McCullough (2002)
15 * Modified to support SH7300 SCIF. Takashi Kusuda (Jun 2003).
Magnus Dammd89ddd12007-07-25 11:42:56 +090016 * Removed SH7300 support (Jul 2007).
Linus Torvalds1da177e2005-04-16 15:20:36 -070017 *
18 * This file is subject to the terms and conditions of the GNU General Public
19 * License. See the file "COPYING" in the main directory of this archive
20 * for more details.
21 */
Paul Mundt0b3d4ef2007-03-14 13:22:37 +090022#if defined(CONFIG_SERIAL_SH_SCI_CONSOLE) && defined(CONFIG_MAGIC_SYSRQ)
23#define SUPPORT_SYSRQ
24#endif
Linus Torvalds1da177e2005-04-16 15:20:36 -070025
26#undef DEBUG
27
Linus Torvalds1da177e2005-04-16 15:20:36 -070028#include <linux/module.h>
29#include <linux/errno.h>
Linus Torvalds1da177e2005-04-16 15:20:36 -070030#include <linux/timer.h>
31#include <linux/interrupt.h>
32#include <linux/tty.h>
33#include <linux/tty_flip.h>
34#include <linux/serial.h>
35#include <linux/major.h>
36#include <linux/string.h>
37#include <linux/sysrq.h>
Linus Torvalds1da177e2005-04-16 15:20:36 -070038#include <linux/ioport.h>
39#include <linux/mm.h>
Linus Torvalds1da177e2005-04-16 15:20:36 -070040#include <linux/init.h>
41#include <linux/delay.h>
42#include <linux/console.h>
Paul Mundte108b2c2006-09-27 16:32:13 +090043#include <linux/platform_device.h>
Linus Torvalds1da177e2005-04-16 15:20:36 -070044
45#ifdef CONFIG_CPU_FREQ
46#include <linux/notifier.h>
47#include <linux/cpufreq.h>
48#endif
49
Paul Mundtb7a76e42006-02-01 03:06:06 -080050#if defined(CONFIG_SUPERH) && !defined(CONFIG_SUPERH64)
Paul Mundtfa5da2f2007-03-08 17:27:37 +090051#include <linux/ctype.h>
Paul Mundtb7a76e42006-02-01 03:06:06 -080052#include <asm/clock.h>
Paul Mundte108b2c2006-09-27 16:32:13 +090053#include <asm/sh_bios.h>
54#include <asm/kgdb.h>
Paul Mundtb7a76e42006-02-01 03:06:06 -080055#endif
Linus Torvalds1da177e2005-04-16 15:20:36 -070056
Paul Mundte108b2c2006-09-27 16:32:13 +090057#include <asm/sci.h>
Linus Torvalds1da177e2005-04-16 15:20:36 -070058#include "sh-sci.h"
59
Paul Mundte108b2c2006-09-27 16:32:13 +090060struct sci_port {
61 struct uart_port port;
Linus Torvalds1da177e2005-04-16 15:20:36 -070062
Paul Mundte108b2c2006-09-27 16:32:13 +090063 /* Port type */
64 unsigned int type;
65
66 /* Port IRQs: ERI, RXI, TXI, BRI (optional) */
Paul Mundt32351a22007-03-12 14:38:59 +090067 unsigned int irqs[SCIx_NR_IRQS];
Paul Mundte108b2c2006-09-27 16:32:13 +090068
69 /* Port pin configuration */
70 void (*init_pins)(struct uart_port *port,
71 unsigned int cflag);
72
73 /* Port enable callback */
74 void (*enable)(struct uart_port *port);
75
76 /* Port disable callback */
77 void (*disable)(struct uart_port *port);
78
79 /* Break timer */
80 struct timer_list break_timer;
81 int break_flag;
dmitry pervushin1534a3b2007-04-24 13:41:12 +090082
Paul Mundt005a3362007-04-26 11:45:32 +090083#if defined(CONFIG_SUPERH) && !defined(CONFIG_SUPERH64)
dmitry pervushin1534a3b2007-04-24 13:41:12 +090084 /* Port clock */
85 struct clk *clk;
Paul Mundt005a3362007-04-26 11:45:32 +090086#endif
Paul Mundte108b2c2006-09-27 16:32:13 +090087};
88
89#ifdef CONFIG_SH_KGDB
Linus Torvalds1da177e2005-04-16 15:20:36 -070090static struct sci_port *kgdb_sci_port;
Paul Mundte108b2c2006-09-27 16:32:13 +090091#endif
Linus Torvalds1da177e2005-04-16 15:20:36 -070092
93#ifdef CONFIG_SERIAL_SH_SCI_CONSOLE
Paul Mundte108b2c2006-09-27 16:32:13 +090094static struct sci_port *serial_console_port;
95#endif
Linus Torvalds1da177e2005-04-16 15:20:36 -070096
97/* Function prototypes */
Russell Kingb129a8c2005-08-31 10:12:14 +010098static void sci_stop_tx(struct uart_port *port);
Linus Torvalds1da177e2005-04-16 15:20:36 -070099
Paul Mundte108b2c2006-09-27 16:32:13 +0900100#define SCI_NPORTS CONFIG_SERIAL_SH_SCI_NR_UARTS
101
102static struct sci_port sci_ports[SCI_NPORTS];
Linus Torvalds1da177e2005-04-16 15:20:36 -0700103static struct uart_driver sci_uart_driver;
104
Paul Mundte108b2c2006-09-27 16:32:13 +0900105#if defined(CONFIG_SERIAL_SH_SCI_CONSOLE) && \
106 defined(CONFIG_SH_STANDARD_BIOS) || defined(CONFIG_SH_KGDB)
107static inline void handle_error(struct uart_port *port)
108{
109 /* Clear error flags */
Linus Torvalds1da177e2005-04-16 15:20:36 -0700110 sci_out(port, SCxSR, SCxSR_ERROR_CLEAR(port));
111}
112
113static int get_char(struct uart_port *port)
114{
115 unsigned long flags;
116 unsigned short status;
117 int c;
118
Paul Mundte108b2c2006-09-27 16:32:13 +0900119 spin_lock_irqsave(&port->lock, flags);
120 do {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700121 status = sci_in(port, SCxSR);
122 if (status & SCxSR_ERRORS(port)) {
123 handle_error(port);
124 continue;
125 }
126 } while (!(status & SCxSR_RDxF(port)));
127 c = sci_in(port, SCxRDR);
128 sci_in(port, SCxSR); /* Dummy read */
129 sci_out(port, SCxSR, SCxSR_RDxF_CLEAR(port));
Paul Mundte108b2c2006-09-27 16:32:13 +0900130 spin_unlock_irqrestore(&port->lock, flags);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700131
132 return c;
133}
Linus Torvalds1da177e2005-04-16 15:20:36 -0700134#endif /* CONFIG_SH_STANDARD_BIOS || CONFIG_SH_KGDB */
135
Paul Mundte108b2c2006-09-27 16:32:13 +0900136#if defined(CONFIG_SERIAL_SH_SCI_CONSOLE) || defined(CONFIG_SH_KGDB)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700137static void put_char(struct uart_port *port, char c)
138{
139 unsigned long flags;
140 unsigned short status;
141
Paul Mundte108b2c2006-09-27 16:32:13 +0900142 spin_lock_irqsave(&port->lock, flags);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700143
144 do {
145 status = sci_in(port, SCxSR);
146 } while (!(status & SCxSR_TDxE(port)));
147
148 sci_out(port, SCxTDR, c);
149 sci_in(port, SCxSR); /* Dummy read */
150 sci_out(port, SCxSR, SCxSR_TDxE_CLEAR(port));
151
Paul Mundte108b2c2006-09-27 16:32:13 +0900152 spin_unlock_irqrestore(&port->lock, flags);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700153}
Paul Mundte108b2c2006-09-27 16:32:13 +0900154#endif
Linus Torvalds1da177e2005-04-16 15:20:36 -0700155
Paul Mundte108b2c2006-09-27 16:32:13 +0900156#ifdef CONFIG_SERIAL_SH_SCI_CONSOLE
Linus Torvalds1da177e2005-04-16 15:20:36 -0700157static void put_string(struct sci_port *sci_port, const char *buffer, int count)
158{
159 struct uart_port *port = &sci_port->port;
160 const unsigned char *p = buffer;
161 int i;
162
163#if defined(CONFIG_SH_STANDARD_BIOS) || defined(CONFIG_SH_KGDB)
164 int checksum;
165 int usegdb=0;
166
167#ifdef CONFIG_SH_STANDARD_BIOS
Paul Mundtb7a76e42006-02-01 03:06:06 -0800168 /* This call only does a trap the first time it is
Linus Torvalds1da177e2005-04-16 15:20:36 -0700169 * called, and so is safe to do here unconditionally
170 */
171 usegdb |= sh_bios_in_gdb_mode();
172#endif
173#ifdef CONFIG_SH_KGDB
Paul Mundtfa5da2f2007-03-08 17:27:37 +0900174 usegdb |= (kgdb_in_gdb_mode && (sci_port == kgdb_sci_port));
Linus Torvalds1da177e2005-04-16 15:20:36 -0700175#endif
176
177 if (usegdb) {
178 /* $<packet info>#<checksum>. */
179 do {
180 unsigned char c;
181 put_char(port, '$');
182 put_char(port, 'O'); /* 'O'utput to console */
183 checksum = 'O';
184
185 for (i=0; i<count; i++) { /* Don't use run length encoding */
186 int h, l;
187
188 c = *p++;
189 h = highhex(c);
190 l = lowhex(c);
191 put_char(port, h);
192 put_char(port, l);
193 checksum += h + l;
194 }
195 put_char(port, '#');
196 put_char(port, highhex(checksum));
197 put_char(port, lowhex(checksum));
198 } while (get_char(port) != '+');
199 } else
200#endif /* CONFIG_SH_STANDARD_BIOS || CONFIG_SH_KGDB */
201 for (i=0; i<count; i++) {
202 if (*p == 10)
203 put_char(port, '\r');
204 put_char(port, *p++);
205 }
206}
207#endif /* CONFIG_SERIAL_SH_SCI_CONSOLE */
208
Linus Torvalds1da177e2005-04-16 15:20:36 -0700209#ifdef CONFIG_SH_KGDB
Paul Mundte108b2c2006-09-27 16:32:13 +0900210static int kgdb_sci_getchar(void)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700211{
212 int c;
213
Linus Torvalds1da177e2005-04-16 15:20:36 -0700214 /* Keep trying to read a character, this could be neater */
Paul Mundtfa5da2f2007-03-08 17:27:37 +0900215 while ((c = get_char(&kgdb_sci_port->port)) < 0)
Paul Mundte108b2c2006-09-27 16:32:13 +0900216 cpu_relax();
Linus Torvalds1da177e2005-04-16 15:20:36 -0700217
218 return c;
219}
220
Paul Mundte108b2c2006-09-27 16:32:13 +0900221static inline void kgdb_sci_putchar(int c)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700222{
Paul Mundtfa5da2f2007-03-08 17:27:37 +0900223 put_char(&kgdb_sci_port->port, c);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700224}
Linus Torvalds1da177e2005-04-16 15:20:36 -0700225#endif /* CONFIG_SH_KGDB */
226
227#if defined(__H8300S__)
228enum { sci_disable, sci_enable };
229
Paul Mundte108b2c2006-09-27 16:32:13 +0900230static void h8300_sci_config(struct uart_port* port, unsigned int ctrl)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700231{
232 volatile unsigned char *mstpcrl=(volatile unsigned char *)MSTPCRL;
233 int ch = (port->mapbase - SMR0) >> 3;
234 unsigned char mask = 1 << (ch+1);
235
236 if (ctrl == sci_disable) {
237 *mstpcrl |= mask;
238 } else {
239 *mstpcrl &= ~mask;
240 }
241}
Paul Mundte108b2c2006-09-27 16:32:13 +0900242
243static inline void h8300_sci_enable(struct uart_port *port)
244{
245 h8300_sci_config(port, sci_enable);
246}
247
248static inline void h8300_sci_disable(struct uart_port *port)
249{
250 h8300_sci_config(port, sci_disable);
251}
Linus Torvalds1da177e2005-04-16 15:20:36 -0700252#endif
253
Paul Mundte108b2c2006-09-27 16:32:13 +0900254#if defined(SCI_ONLY) || defined(SCI_AND_SCIF) && \
255 defined(__H8300H__) || defined(__H8300S__)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700256static void sci_init_pins_sci(struct uart_port* port, unsigned int cflag)
257{
258 int ch = (port->mapbase - SMR0) >> 3;
259
260 /* set DDR regs */
Paul Mundte108b2c2006-09-27 16:32:13 +0900261 H8300_GPIO_DDR(h8300_sci_pins[ch].port,
262 h8300_sci_pins[ch].rx,
263 H8300_GPIO_INPUT);
264 H8300_GPIO_DDR(h8300_sci_pins[ch].port,
265 h8300_sci_pins[ch].tx,
266 H8300_GPIO_OUTPUT);
267
Linus Torvalds1da177e2005-04-16 15:20:36 -0700268 /* tx mark output*/
269 H8300_SCI_DR(ch) |= h8300_sci_pins[ch].tx;
270}
Paul Mundte108b2c2006-09-27 16:32:13 +0900271#else
272#define sci_init_pins_sci NULL
Linus Torvalds1da177e2005-04-16 15:20:36 -0700273#endif
Paul Mundte108b2c2006-09-27 16:32:13 +0900274
275#if defined(CONFIG_CPU_SUBTYPE_SH7707) || defined(CONFIG_CPU_SUBTYPE_SH7709)
276static void sci_init_pins_irda(struct uart_port *port, unsigned int cflag)
277{
278 unsigned int fcr_val = 0;
279
280 if (cflag & CRTSCTS)
281 fcr_val |= SCFCR_MCE;
282
283 sci_out(port, SCFCR, fcr_val);
284}
285#else
286#define sci_init_pins_irda NULL
287#endif
288
289#ifdef SCI_ONLY
290#define sci_init_pins_scif NULL
Linus Torvalds1da177e2005-04-16 15:20:36 -0700291#endif
292
293#if defined(SCIF_ONLY) || defined(SCI_AND_SCIF)
Magnus Dammd89ddd12007-07-25 11:42:56 +0900294#if defined(CONFIG_CPU_SUBTYPE_SH7710) || defined(CONFIG_CPU_SUBTYPE_SH7712)
Nobuhiro Iwamatsu9465a542007-03-27 18:13:51 +0900295static void sci_init_pins_scif(struct uart_port* port, unsigned int cflag)
296{
297 unsigned int fcr_val = 0;
298
299 set_sh771x_scif_pfc(port);
300 if (cflag & CRTSCTS) {
301 fcr_val |= SCFCR_MCE;
302 }
303 sci_out(port, SCFCR, fcr_val);
304}
Markus Brunner3ea6bc32007-08-20 08:59:33 +0900305#elif defined(CONFIG_CPU_SUBTYPE_SH7720)
306static void sci_init_pins_scif(struct uart_port *port, unsigned int cflag)
307{
308 unsigned int fcr_val = 0;
309 unsigned short data;
310
311 if (cflag & CRTSCTS) {
312 /* enable RTS/CTS */
313 if (port->mapbase == 0xa4430000) { /* SCIF0 */
314 /* Clear PTCR bit 9-2; enable all scif pins but sck */
315 data = ctrl_inw(PORT_PTCR);
316 ctrl_outw((data & 0xfc03), PORT_PTCR);
317 } else if (port->mapbase == 0xa4438000) { /* SCIF1 */
318 /* Clear PVCR bit 9-2 */
319 data = ctrl_inw(PORT_PVCR);
320 ctrl_outw((data & 0xfc03), PORT_PVCR);
321 }
322 fcr_val |= SCFCR_MCE;
323 } else {
324 if (port->mapbase == 0xa4430000) { /* SCIF0 */
325 /* Clear PTCR bit 5-2; enable only tx and rx */
326 data = ctrl_inw(PORT_PTCR);
327 ctrl_outw((data & 0xffc3), PORT_PTCR);
328 } else if (port->mapbase == 0xa4438000) { /* SCIF1 */
329 /* Clear PVCR bit 5-2 */
330 data = ctrl_inw(PORT_PVCR);
331 ctrl_outw((data & 0xffc3), PORT_PVCR);
332 }
333 }
334 sci_out(port, SCFCR, fcr_val);
335}
336
Paul Mundtb7a76e42006-02-01 03:06:06 -0800337#elif defined(CONFIG_CPU_SH3)
Paul Mundte108b2c2006-09-27 16:32:13 +0900338/* For SH7705, SH7706, SH7707, SH7709, SH7709A, SH7729 */
Linus Torvalds1da177e2005-04-16 15:20:36 -0700339static void sci_init_pins_scif(struct uart_port *port, unsigned int cflag)
340{
341 unsigned int fcr_val = 0;
Paul Mundtb7a76e42006-02-01 03:06:06 -0800342 unsigned short data;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700343
Paul Mundtb7a76e42006-02-01 03:06:06 -0800344 /* We need to set SCPCR to enable RTS/CTS */
345 data = ctrl_inw(SCPCR);
346 /* Clear out SCP7MD1,0, SCP6MD1,0, SCP4MD1,0*/
347 ctrl_outw(data & 0x0fcf, SCPCR);
348
Linus Torvalds1da177e2005-04-16 15:20:36 -0700349 if (cflag & CRTSCTS)
350 fcr_val |= SCFCR_MCE;
351 else {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700352 /* We need to set SCPCR to enable RTS/CTS */
353 data = ctrl_inw(SCPCR);
354 /* Clear out SCP7MD1,0, SCP4MD1,0,
355 Set SCP6MD1,0 = {01} (output) */
Paul Mundtb7a76e42006-02-01 03:06:06 -0800356 ctrl_outw((data & 0x0fcf) | 0x1000, SCPCR);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700357
358 data = ctrl_inb(SCPDR);
359 /* Set /RTS2 (bit6) = 0 */
Paul Mundtb7a76e42006-02-01 03:06:06 -0800360 ctrl_outb(data & 0xbf, SCPDR);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700361 }
Paul Mundtb7a76e42006-02-01 03:06:06 -0800362
Linus Torvalds1da177e2005-04-16 15:20:36 -0700363 sci_out(port, SCFCR, fcr_val);
364}
Paul Mundt41504c32006-12-11 20:28:03 +0900365#elif defined(CONFIG_CPU_SUBTYPE_SH7722)
366static void sci_init_pins_scif(struct uart_port *port, unsigned int cflag)
367{
368 unsigned int fcr_val = 0;
369
370 if (cflag & CRTSCTS) {
371 fcr_val |= SCFCR_MCE;
372
373 ctrl_outw(0x0000, PORT_PSCR);
374 } else {
375 unsigned short data;
376
377 data = ctrl_inw(PORT_PSCR);
378 data &= 0x033f;
379 data |= 0x0400;
380 ctrl_outw(data, PORT_PSCR);
381
382 ctrl_outw(ctrl_inw(SCSPTR0) & 0x17, SCSPTR0);
383 }
384
385 sci_out(port, SCFCR, fcr_val);
386}
Linus Torvalds1da177e2005-04-16 15:20:36 -0700387#else
Linus Torvalds1da177e2005-04-16 15:20:36 -0700388/* For SH7750 */
389static void sci_init_pins_scif(struct uart_port *port, unsigned int cflag)
390{
391 unsigned int fcr_val = 0;
392
393 if (cflag & CRTSCTS) {
394 fcr_val |= SCFCR_MCE;
395 } else {
Paul Mundte108b2c2006-09-27 16:32:13 +0900396#ifdef CONFIG_CPU_SUBTYPE_SH7343
397 /* Nothing */
Paul Mundt2b1bd1a2007-06-20 18:27:10 +0900398#elif defined(CONFIG_CPU_SUBTYPE_SH7780) || \
399 defined(CONFIG_CPU_SUBTYPE_SH7785) || \
400 defined(CONFIG_CPU_SUBTYPE_SHX3)
Paul Mundtb7a76e42006-02-01 03:06:06 -0800401 ctrl_outw(0x0080, SCSPTR0); /* Set RTS = 1 */
402#else
Linus Torvalds1da177e2005-04-16 15:20:36 -0700403 ctrl_outw(0x0080, SCSPTR2); /* Set RTS = 1 */
Paul Mundtb7a76e42006-02-01 03:06:06 -0800404#endif
Linus Torvalds1da177e2005-04-16 15:20:36 -0700405 }
406 sci_out(port, SCFCR, fcr_val);
407}
Paul Mundte108b2c2006-09-27 16:32:13 +0900408#endif
Linus Torvalds1da177e2005-04-16 15:20:36 -0700409
Paul Mundt32351a22007-03-12 14:38:59 +0900410#if defined(CONFIG_CPU_SUBTYPE_SH7760) || \
411 defined(CONFIG_CPU_SUBTYPE_SH7780) || \
412 defined(CONFIG_CPU_SUBTYPE_SH7785)
Paul Mundte108b2c2006-09-27 16:32:13 +0900413static inline int scif_txroom(struct uart_port *port)
414{
415 return SCIF_TXROOM_MAX - (sci_in(port, SCTFDR) & 0x7f);
416}
417
418static inline int scif_rxroom(struct uart_port *port)
419{
420 return sci_in(port, SCRFDR) & 0x7f;
421}
422#else
423static inline int scif_txroom(struct uart_port *port)
424{
425 return SCIF_TXROOM_MAX - (sci_in(port, SCFDR) >> 8);
426}
427
428static inline int scif_rxroom(struct uart_port *port)
429{
430 return sci_in(port, SCFDR) & SCIF_RFDC_MASK;
431}
Linus Torvalds1da177e2005-04-16 15:20:36 -0700432#endif
433#endif /* SCIF_ONLY || SCI_AND_SCIF */
434
Paul Mundte108b2c2006-09-27 16:32:13 +0900435static inline int sci_txroom(struct uart_port *port)
436{
437 return ((sci_in(port, SCxSR) & SCI_TDRE) != 0);
438}
439
440static inline int sci_rxroom(struct uart_port *port)
441{
442 return ((sci_in(port, SCxSR) & SCxSR_RDxF(port)) != 0);
443}
444
Linus Torvalds1da177e2005-04-16 15:20:36 -0700445/* ********************************************************************** *
446 * the interrupt related routines *
447 * ********************************************************************** */
448
449static void sci_transmit_chars(struct uart_port *port)
450{
451 struct circ_buf *xmit = &port->info->xmit;
452 unsigned int stopped = uart_tx_stopped(port);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700453 unsigned short status;
454 unsigned short ctrl;
Paul Mundte108b2c2006-09-27 16:32:13 +0900455 int count;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700456
457 status = sci_in(port, SCxSR);
458 if (!(status & SCxSR_TDxE(port))) {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700459 ctrl = sci_in(port, SCSCR);
460 if (uart_circ_empty(xmit)) {
461 ctrl &= ~SCI_CTRL_FLAGS_TIE;
462 } else {
463 ctrl |= SCI_CTRL_FLAGS_TIE;
464 }
465 sci_out(port, SCSCR, ctrl);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700466 return;
467 }
468
Paul Mundte108b2c2006-09-27 16:32:13 +0900469#ifndef SCI_ONLY
470 if (port->type == PORT_SCIF)
471 count = scif_txroom(port);
472 else
Paul Mundtb7a76e42006-02-01 03:06:06 -0800473#endif
Paul Mundte108b2c2006-09-27 16:32:13 +0900474 count = sci_txroom(port);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700475
476 do {
477 unsigned char c;
478
479 if (port->x_char) {
480 c = port->x_char;
481 port->x_char = 0;
482 } else if (!uart_circ_empty(xmit) && !stopped) {
483 c = xmit->buf[xmit->tail];
484 xmit->tail = (xmit->tail + 1) & (UART_XMIT_SIZE - 1);
485 } else {
486 break;
487 }
488
489 sci_out(port, SCxTDR, c);
490
491 port->icount.tx++;
492 } while (--count > 0);
493
494 sci_out(port, SCxSR, SCxSR_TDxE_CLEAR(port));
495
496 if (uart_circ_chars_pending(xmit) < WAKEUP_CHARS)
497 uart_write_wakeup(port);
498 if (uart_circ_empty(xmit)) {
Russell Kingb129a8c2005-08-31 10:12:14 +0100499 sci_stop_tx(port);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700500 } else {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700501 ctrl = sci_in(port, SCSCR);
502
503#if !defined(SCI_ONLY)
504 if (port->type == PORT_SCIF) {
505 sci_in(port, SCxSR); /* Dummy read */
506 sci_out(port, SCxSR, SCxSR_TDxE_CLEAR(port));
507 }
508#endif
509
510 ctrl |= SCI_CTRL_FLAGS_TIE;
511 sci_out(port, SCSCR, ctrl);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700512 }
513}
514
515/* On SH3, SCIF may read end-of-break as a space->mark char */
516#define STEPFN(c) ({int __c=(c); (((__c-1)|(__c)) == -1); })
517
David Howells7d12e782006-10-05 14:55:46 +0100518static inline void sci_receive_chars(struct uart_port *port)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700519{
Paul Mundte108b2c2006-09-27 16:32:13 +0900520 struct sci_port *sci_port = (struct sci_port *)port;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700521 struct tty_struct *tty = port->info->tty;
522 int i, count, copied = 0;
523 unsigned short status;
Alan Cox33f0f882006-01-09 20:54:13 -0800524 unsigned char flag;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700525
526 status = sci_in(port, SCxSR);
527 if (!(status & SCxSR_RDxF(port)))
528 return;
529
530 while (1) {
531#if !defined(SCI_ONLY)
Paul Mundte108b2c2006-09-27 16:32:13 +0900532 if (port->type == PORT_SCIF)
533 count = scif_rxroom(port);
534 else
Paul Mundtb7a76e42006-02-01 03:06:06 -0800535#endif
Paul Mundte108b2c2006-09-27 16:32:13 +0900536 count = sci_rxroom(port);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700537
538 /* Don't copy more bytes than there is room for in the buffer */
Alan Cox33f0f882006-01-09 20:54:13 -0800539 count = tty_buffer_request_room(tty, count);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700540
541 /* If for any reason we can't copy more data, we're done! */
542 if (count == 0)
543 break;
544
545 if (port->type == PORT_SCI) {
546 char c = sci_in(port, SCxRDR);
David Howells7d12e782006-10-05 14:55:46 +0100547 if (uart_handle_sysrq_char(port, c) || sci_port->break_flag)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700548 count = 0;
Paul Mundte108b2c2006-09-27 16:32:13 +0900549 else {
550 tty_insert_flip_char(tty, c, TTY_NORMAL);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700551 }
552 } else {
553 for (i=0; i<count; i++) {
554 char c = sci_in(port, SCxRDR);
555 status = sci_in(port, SCxSR);
556#if defined(CONFIG_CPU_SH3)
557 /* Skip "chars" during break */
Paul Mundte108b2c2006-09-27 16:32:13 +0900558 if (sci_port->break_flag) {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700559 if ((c == 0) &&
560 (status & SCxSR_FER(port))) {
561 count--; i--;
562 continue;
563 }
Paul Mundte108b2c2006-09-27 16:32:13 +0900564
Linus Torvalds1da177e2005-04-16 15:20:36 -0700565 /* Nonzero => end-of-break */
566 pr_debug("scif: debounce<%02x>\n", c);
Paul Mundte108b2c2006-09-27 16:32:13 +0900567 sci_port->break_flag = 0;
568
Linus Torvalds1da177e2005-04-16 15:20:36 -0700569 if (STEPFN(c)) {
570 count--; i--;
571 continue;
572 }
573 }
574#endif /* CONFIG_CPU_SH3 */
David Howells7d12e782006-10-05 14:55:46 +0100575 if (uart_handle_sysrq_char(port, c)) {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700576 count--; i--;
577 continue;
578 }
579
580 /* Store data and status */
Linus Torvalds1da177e2005-04-16 15:20:36 -0700581 if (status&SCxSR_FER(port)) {
Alan Cox33f0f882006-01-09 20:54:13 -0800582 flag = TTY_FRAME;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700583 pr_debug("sci: frame error\n");
584 } else if (status&SCxSR_PER(port)) {
Alan Cox33f0f882006-01-09 20:54:13 -0800585 flag = TTY_PARITY;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700586 pr_debug("sci: parity error\n");
Alan Cox33f0f882006-01-09 20:54:13 -0800587 } else
588 flag = TTY_NORMAL;
589 tty_insert_flip_char(tty, c, flag);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700590 }
591 }
592
593 sci_in(port, SCxSR); /* dummy read */
594 sci_out(port, SCxSR, SCxSR_RDxF_CLEAR(port));
595
Linus Torvalds1da177e2005-04-16 15:20:36 -0700596 copied += count;
597 port->icount.rx += count;
598 }
599
600 if (copied) {
601 /* Tell the rest of the system the news. New characters! */
602 tty_flip_buffer_push(tty);
603 } else {
604 sci_in(port, SCxSR); /* dummy read */
605 sci_out(port, SCxSR, SCxSR_RDxF_CLEAR(port));
606 }
607}
608
609#define SCI_BREAK_JIFFIES (HZ/20)
610/* The sci generates interrupts during the break,
611 * 1 per millisecond or so during the break period, for 9600 baud.
612 * So dont bother disabling interrupts.
613 * But dont want more than 1 break event.
614 * Use a kernel timer to periodically poll the rx line until
615 * the break is finished.
616 */
617static void sci_schedule_break_timer(struct sci_port *port)
618{
619 port->break_timer.expires = jiffies + SCI_BREAK_JIFFIES;
620 add_timer(&port->break_timer);
621}
622/* Ensure that two consecutive samples find the break over. */
623static void sci_break_timer(unsigned long data)
624{
Paul Mundte108b2c2006-09-27 16:32:13 +0900625 struct sci_port *port = (struct sci_port *)data;
626
627 if (sci_rxd_in(&port->port) == 0) {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700628 port->break_flag = 1;
Paul Mundte108b2c2006-09-27 16:32:13 +0900629 sci_schedule_break_timer(port);
630 } else if (port->break_flag == 1) {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700631 /* break is over. */
632 port->break_flag = 2;
Paul Mundte108b2c2006-09-27 16:32:13 +0900633 sci_schedule_break_timer(port);
634 } else
635 port->break_flag = 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700636}
637
638static inline int sci_handle_errors(struct uart_port *port)
639{
640 int copied = 0;
641 unsigned short status = sci_in(port, SCxSR);
642 struct tty_struct *tty = port->info->tty;
643
Paul Mundte108b2c2006-09-27 16:32:13 +0900644 if (status & SCxSR_ORER(port)) {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700645 /* overrun error */
Paul Mundte108b2c2006-09-27 16:32:13 +0900646 if (tty_insert_flip_char(tty, 0, TTY_OVERRUN))
Alan Cox33f0f882006-01-09 20:54:13 -0800647 copied++;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700648 pr_debug("sci: overrun error\n");
649 }
650
Paul Mundte108b2c2006-09-27 16:32:13 +0900651 if (status & SCxSR_FER(port)) {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700652 if (sci_rxd_in(port) == 0) {
653 /* Notify of BREAK */
Paul Mundte108b2c2006-09-27 16:32:13 +0900654 struct sci_port *sci_port = (struct sci_port *)port;
655
656 if (!sci_port->break_flag) {
657 sci_port->break_flag = 1;
658 sci_schedule_break_timer(sci_port);
659
Linus Torvalds1da177e2005-04-16 15:20:36 -0700660 /* Do sysrq handling. */
Paul Mundte108b2c2006-09-27 16:32:13 +0900661 if (uart_handle_break(port))
Linus Torvalds1da177e2005-04-16 15:20:36 -0700662 return 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700663 pr_debug("sci: BREAK detected\n");
Paul Mundte108b2c2006-09-27 16:32:13 +0900664 if (tty_insert_flip_char(tty, 0, TTY_BREAK))
Alan Cox33f0f882006-01-09 20:54:13 -0800665 copied++;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700666 }
Paul Mundte108b2c2006-09-27 16:32:13 +0900667 } else {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700668 /* frame error */
Paul Mundte108b2c2006-09-27 16:32:13 +0900669 if (tty_insert_flip_char(tty, 0, TTY_FRAME))
Alan Cox33f0f882006-01-09 20:54:13 -0800670 copied++;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700671 pr_debug("sci: frame error\n");
672 }
673 }
674
Paul Mundte108b2c2006-09-27 16:32:13 +0900675 if (status & SCxSR_PER(port)) {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700676 /* parity error */
Paul Mundte108b2c2006-09-27 16:32:13 +0900677 if (tty_insert_flip_char(tty, 0, TTY_PARITY))
678 copied++;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700679 pr_debug("sci: parity error\n");
680 }
681
Alan Cox33f0f882006-01-09 20:54:13 -0800682 if (copied)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700683 tty_flip_buffer_push(tty);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700684
685 return copied;
686}
687
688static inline int sci_handle_breaks(struct uart_port *port)
689{
690 int copied = 0;
691 unsigned short status = sci_in(port, SCxSR);
692 struct tty_struct *tty = port->info->tty;
693 struct sci_port *s = &sci_ports[port->line];
694
Paul Mundt0b3d4ef2007-03-14 13:22:37 +0900695 if (uart_handle_break(port))
696 return 0;
697
Paul Mundtb7a76e42006-02-01 03:06:06 -0800698 if (!s->break_flag && status & SCxSR_BRK(port)) {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700699#if defined(CONFIG_CPU_SH3)
700 /* Debounce break */
701 s->break_flag = 1;
702#endif
703 /* Notify of BREAK */
Paul Mundte108b2c2006-09-27 16:32:13 +0900704 if (tty_insert_flip_char(tty, 0, TTY_BREAK))
Alan Cox33f0f882006-01-09 20:54:13 -0800705 copied++;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700706 pr_debug("sci: BREAK detected\n");
707 }
708
709#if defined(SCIF_ORER)
710 /* XXX: Handle SCIF overrun error */
711 if (port->type == PORT_SCIF && (sci_in(port, SCLSR) & SCIF_ORER) != 0) {
712 sci_out(port, SCLSR, 0);
Paul Mundte108b2c2006-09-27 16:32:13 +0900713 if (tty_insert_flip_char(tty, 0, TTY_OVERRUN)) {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700714 copied++;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700715 pr_debug("sci: overrun error\n");
716 }
717 }
718#endif
719
Alan Cox33f0f882006-01-09 20:54:13 -0800720 if (copied)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700721 tty_flip_buffer_push(tty);
Paul Mundte108b2c2006-09-27 16:32:13 +0900722
Linus Torvalds1da177e2005-04-16 15:20:36 -0700723 return copied;
724}
725
David Howells7d12e782006-10-05 14:55:46 +0100726static irqreturn_t sci_rx_interrupt(int irq, void *port)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700727{
Linus Torvalds1da177e2005-04-16 15:20:36 -0700728 /* I think sci_receive_chars has to be called irrespective
729 * of whether the I_IXOFF is set, otherwise, how is the interrupt
730 * to be disabled?
731 */
David Howells7d12e782006-10-05 14:55:46 +0100732 sci_receive_chars(port);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700733
734 return IRQ_HANDLED;
735}
736
David Howells7d12e782006-10-05 14:55:46 +0100737static irqreturn_t sci_tx_interrupt(int irq, void *ptr)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700738{
739 struct uart_port *port = ptr;
740
Paul Mundte108b2c2006-09-27 16:32:13 +0900741 spin_lock_irq(&port->lock);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700742 sci_transmit_chars(port);
Paul Mundte108b2c2006-09-27 16:32:13 +0900743 spin_unlock_irq(&port->lock);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700744
745 return IRQ_HANDLED;
746}
747
David Howells7d12e782006-10-05 14:55:46 +0100748static irqreturn_t sci_er_interrupt(int irq, void *ptr)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700749{
750 struct uart_port *port = ptr;
751
752 /* Handle errors */
753 if (port->type == PORT_SCI) {
754 if (sci_handle_errors(port)) {
755 /* discard character in rx buffer */
756 sci_in(port, SCxSR);
757 sci_out(port, SCxSR, SCxSR_RDxF_CLEAR(port));
758 }
759 } else {
760#if defined(SCIF_ORER)
761 if((sci_in(port, SCLSR) & SCIF_ORER) != 0) {
762 struct tty_struct *tty = port->info->tty;
763
764 sci_out(port, SCLSR, 0);
Alan Cox33f0f882006-01-09 20:54:13 -0800765 tty_insert_flip_char(tty, 0, TTY_OVERRUN);
766 tty_flip_buffer_push(tty);
767 pr_debug("scif: overrun error\n");
Linus Torvalds1da177e2005-04-16 15:20:36 -0700768 }
769#endif
David Howells7d12e782006-10-05 14:55:46 +0100770 sci_rx_interrupt(irq, ptr);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700771 }
772
773 sci_out(port, SCxSR, SCxSR_ERROR_CLEAR(port));
774
775 /* Kick the transmission */
David Howells7d12e782006-10-05 14:55:46 +0100776 sci_tx_interrupt(irq, ptr);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700777
778 return IRQ_HANDLED;
779}
780
David Howells7d12e782006-10-05 14:55:46 +0100781static irqreturn_t sci_br_interrupt(int irq, void *ptr)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700782{
783 struct uart_port *port = ptr;
784
785 /* Handle BREAKs */
786 sci_handle_breaks(port);
787 sci_out(port, SCxSR, SCxSR_BREAK_CLEAR(port));
788
789 return IRQ_HANDLED;
790}
791
David Howells7d12e782006-10-05 14:55:46 +0100792static irqreturn_t sci_mpxed_interrupt(int irq, void *ptr)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700793{
794 unsigned short ssr_status, scr_status;
795 struct uart_port *port = ptr;
796
797 ssr_status = sci_in(port,SCxSR);
798 scr_status = sci_in(port,SCSCR);
799
800 /* Tx Interrupt */
Paul Mundte108b2c2006-09-27 16:32:13 +0900801 if ((ssr_status & 0x0020) && (scr_status & 0x0080))
David Howells7d12e782006-10-05 14:55:46 +0100802 sci_tx_interrupt(irq, ptr);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700803 /* Rx Interrupt */
Paul Mundte108b2c2006-09-27 16:32:13 +0900804 if ((ssr_status & 0x0002) && (scr_status & 0x0040))
David Howells7d12e782006-10-05 14:55:46 +0100805 sci_rx_interrupt(irq, ptr);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700806 /* Error Interrupt */
Paul Mundte108b2c2006-09-27 16:32:13 +0900807 if ((ssr_status & 0x0080) && (scr_status & 0x0400))
David Howells7d12e782006-10-05 14:55:46 +0100808 sci_er_interrupt(irq, ptr);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700809 /* Break Interrupt */
Paul Mundte108b2c2006-09-27 16:32:13 +0900810 if ((ssr_status & 0x0010) && (scr_status & 0x0200))
David Howells7d12e782006-10-05 14:55:46 +0100811 sci_br_interrupt(irq, ptr);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700812
813 return IRQ_HANDLED;
814}
815
816#ifdef CONFIG_CPU_FREQ
817/*
818 * Here we define a transistion notifier so that we can update all of our
819 * ports' baud rate when the peripheral clock changes.
820 */
Paul Mundte108b2c2006-09-27 16:32:13 +0900821static int sci_notifier(struct notifier_block *self,
822 unsigned long phase, void *p)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700823{
824 struct cpufreq_freqs *freqs = p;
825 int i;
826
827 if ((phase == CPUFREQ_POSTCHANGE) ||
828 (phase == CPUFREQ_RESUMECHANGE)){
829 for (i = 0; i < SCI_NPORTS; i++) {
830 struct uart_port *port = &sci_ports[i].port;
Paul Mundtb7a76e42006-02-01 03:06:06 -0800831 struct clk *clk;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700832
833 /*
834 * Update the uartclk per-port if frequency has
835 * changed, since it will no longer necessarily be
836 * consistent with the old frequency.
837 *
838 * Really we want to be able to do something like
839 * uart_change_speed() or something along those lines
840 * here to implicitly reset the per-port baud rate..
841 *
842 * Clean this up later..
843 */
Paul Mundt1d118562006-12-01 13:15:14 +0900844 clk = clk_get(NULL, "module_clk");
Paul Mundtb7a76e42006-02-01 03:06:06 -0800845 port->uartclk = clk_get_rate(clk) * 16;
846 clk_put(clk);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700847 }
848
Paul Mundte108b2c2006-09-27 16:32:13 +0900849 printk(KERN_INFO "%s: got a postchange notification "
850 "for cpu %d (old %d, new %d)\n",
851 __FUNCTION__, freqs->cpu, freqs->old, freqs->new);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700852 }
853
854 return NOTIFY_OK;
855}
856
857static struct notifier_block sci_nb = { &sci_notifier, NULL, 0 };
858#endif /* CONFIG_CPU_FREQ */
859
860static int sci_request_irq(struct sci_port *port)
861{
862 int i;
David Howells7d12e782006-10-05 14:55:46 +0100863 irqreturn_t (*handlers[4])(int irq, void *ptr) = {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700864 sci_er_interrupt, sci_rx_interrupt, sci_tx_interrupt,
865 sci_br_interrupt,
866 };
867 const char *desc[] = { "SCI Receive Error", "SCI Receive Data Full",
868 "SCI Transmit Data Empty", "SCI Break" };
869
870 if (port->irqs[0] == port->irqs[1]) {
871 if (!port->irqs[0]) {
872 printk(KERN_ERR "sci: Cannot allocate irq.(IRQ=0)\n");
873 return -ENODEV;
874 }
Paul Mundte108b2c2006-09-27 16:32:13 +0900875
876 if (request_irq(port->irqs[0], sci_mpxed_interrupt,
Paul Mundt35f3c512006-10-06 15:31:16 +0900877 IRQF_DISABLED, "sci", port)) {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700878 printk(KERN_ERR "sci: Cannot allocate irq.\n");
879 return -ENODEV;
880 }
881 } else {
882 for (i = 0; i < ARRAY_SIZE(handlers); i++) {
883 if (!port->irqs[i])
884 continue;
Paul Mundte108b2c2006-09-27 16:32:13 +0900885 if (request_irq(port->irqs[i], handlers[i],
Paul Mundt35f3c512006-10-06 15:31:16 +0900886 IRQF_DISABLED, desc[i], port)) {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700887 printk(KERN_ERR "sci: Cannot allocate irq.\n");
888 return -ENODEV;
889 }
890 }
891 }
892
893 return 0;
894}
895
896static void sci_free_irq(struct sci_port *port)
897{
898 int i;
899
900 if (port->irqs[0] == port->irqs[1]) {
901 if (!port->irqs[0])
902 printk("sci: sci_free_irq error\n");
903 else
904 free_irq(port->irqs[0], port);
905 } else {
906 for (i = 0; i < ARRAY_SIZE(port->irqs); i++) {
907 if (!port->irqs[i])
908 continue;
909
910 free_irq(port->irqs[i], port);
911 }
912 }
913}
914
915static unsigned int sci_tx_empty(struct uart_port *port)
916{
917 /* Can't detect */
918 return TIOCSER_TEMT;
919}
920
921static void sci_set_mctrl(struct uart_port *port, unsigned int mctrl)
922{
923 /* This routine is used for seting signals of: DTR, DCD, CTS/RTS */
924 /* We use SCIF's hardware for CTS/RTS, so don't need any for that. */
925 /* If you have signals for DTR and DCD, please implement here. */
926}
927
928static unsigned int sci_get_mctrl(struct uart_port *port)
929{
930 /* This routine is used for geting signals of: DTR, DCD, DSR, RI,
931 and CTS/RTS */
932
933 return TIOCM_DTR | TIOCM_RTS | TIOCM_DSR;
934}
935
Russell Kingb129a8c2005-08-31 10:12:14 +0100936static void sci_start_tx(struct uart_port *port)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700937{
Paul Mundte108b2c2006-09-27 16:32:13 +0900938 unsigned short ctrl;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700939
Paul Mundte108b2c2006-09-27 16:32:13 +0900940 /* Set TIE (Transmit Interrupt Enable) bit in SCSCR */
941 ctrl = sci_in(port, SCSCR);
942 ctrl |= SCI_CTRL_FLAGS_TIE;
943 sci_out(port, SCSCR, ctrl);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700944}
945
Russell Kingb129a8c2005-08-31 10:12:14 +0100946static void sci_stop_tx(struct uart_port *port)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700947{
Linus Torvalds1da177e2005-04-16 15:20:36 -0700948 unsigned short ctrl;
949
950 /* Clear TIE (Transmit Interrupt Enable) bit in SCSCR */
Linus Torvalds1da177e2005-04-16 15:20:36 -0700951 ctrl = sci_in(port, SCSCR);
952 ctrl &= ~SCI_CTRL_FLAGS_TIE;
953 sci_out(port, SCSCR, ctrl);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700954}
955
956static void sci_start_rx(struct uart_port *port, unsigned int tty_start)
957{
Linus Torvalds1da177e2005-04-16 15:20:36 -0700958 unsigned short ctrl;
959
960 /* Set RIE (Receive Interrupt Enable) bit in SCSCR */
Linus Torvalds1da177e2005-04-16 15:20:36 -0700961 ctrl = sci_in(port, SCSCR);
962 ctrl |= SCI_CTRL_FLAGS_RIE | SCI_CTRL_FLAGS_REIE;
963 sci_out(port, SCSCR, ctrl);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700964}
965
966static void sci_stop_rx(struct uart_port *port)
967{
Linus Torvalds1da177e2005-04-16 15:20:36 -0700968 unsigned short ctrl;
969
970 /* Clear RIE (Receive Interrupt Enable) bit in SCSCR */
Linus Torvalds1da177e2005-04-16 15:20:36 -0700971 ctrl = sci_in(port, SCSCR);
972 ctrl &= ~(SCI_CTRL_FLAGS_RIE | SCI_CTRL_FLAGS_REIE);
973 sci_out(port, SCSCR, ctrl);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700974}
975
976static void sci_enable_ms(struct uart_port *port)
977{
978 /* Nothing here yet .. */
979}
980
981static void sci_break_ctl(struct uart_port *port, int break_state)
982{
983 /* Nothing here yet .. */
984}
985
986static int sci_startup(struct uart_port *port)
987{
988 struct sci_port *s = &sci_ports[port->line];
989
Paul Mundte108b2c2006-09-27 16:32:13 +0900990 if (s->enable)
991 s->enable(port);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700992
Paul Mundt005a3362007-04-26 11:45:32 +0900993#if defined(CONFIG_SUPERH) && !defined(CONFIG_SUPERH64)
dmitry pervushin1534a3b2007-04-24 13:41:12 +0900994 s->clk = clk_get(NULL, "module_clk");
Paul Mundt005a3362007-04-26 11:45:32 +0900995#endif
dmitry pervushin1534a3b2007-04-24 13:41:12 +0900996
Linus Torvalds1da177e2005-04-16 15:20:36 -0700997 sci_request_irq(s);
Yoshinori Satod6569012005-10-14 15:59:12 -0700998 sci_start_tx(port);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700999 sci_start_rx(port, 1);
1000
1001 return 0;
1002}
1003
1004static void sci_shutdown(struct uart_port *port)
1005{
1006 struct sci_port *s = &sci_ports[port->line];
1007
1008 sci_stop_rx(port);
Russell Kingb129a8c2005-08-31 10:12:14 +01001009 sci_stop_tx(port);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001010 sci_free_irq(s);
1011
Paul Mundte108b2c2006-09-27 16:32:13 +09001012 if (s->disable)
1013 s->disable(port);
dmitry pervushin1534a3b2007-04-24 13:41:12 +09001014
Paul Mundt005a3362007-04-26 11:45:32 +09001015#if defined(CONFIG_SUPERH) && !defined(CONFIG_SUPERH64)
dmitry pervushin1534a3b2007-04-24 13:41:12 +09001016 clk_put(s->clk);
1017 s->clk = NULL;
Paul Mundt005a3362007-04-26 11:45:32 +09001018#endif
Linus Torvalds1da177e2005-04-16 15:20:36 -07001019}
1020
Alan Cox606d0992006-12-08 02:38:45 -08001021static void sci_set_termios(struct uart_port *port, struct ktermios *termios,
1022 struct ktermios *old)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001023{
1024 struct sci_port *s = &sci_ports[port->line];
1025 unsigned int status, baud, smr_val;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001026 int t;
1027
1028 baud = uart_get_baud_rate(port, termios, old, 0, port->uartclk/16);
1029
Linus Torvalds1da177e2005-04-16 15:20:36 -07001030 switch (baud) {
Paul Mundtb7a76e42006-02-01 03:06:06 -08001031 case 0:
1032 t = -1;
1033 break;
1034 default:
1035 {
1036#if defined(CONFIG_SUPERH) && !defined(CONFIG_SUPERH64)
dmitry pervushin1534a3b2007-04-24 13:41:12 +09001037 t = SCBRR_VALUE(baud, clk_get_rate(s->clk));
Paul Mundtb7a76e42006-02-01 03:06:06 -08001038#else
1039 t = SCBRR_VALUE(baud);
1040#endif
Paul Mundtb7a76e42006-02-01 03:06:06 -08001041 break;
Paul Mundtfa5da2f2007-03-08 17:27:37 +09001042 }
Linus Torvalds1da177e2005-04-16 15:20:36 -07001043 }
1044
Paul Mundte108b2c2006-09-27 16:32:13 +09001045 do {
1046 status = sci_in(port, SCxSR);
1047 } while (!(status & SCxSR_TEND(port)));
1048
1049 sci_out(port, SCSCR, 0x00); /* TE=0, RE=0, CKE1=0 */
1050
1051#if !defined(SCI_ONLY)
1052 if (port->type == PORT_SCIF)
1053 sci_out(port, SCFCR, SCFCR_RFRST | SCFCR_TFRST);
1054#endif
1055
1056 smr_val = sci_in(port, SCSMR) & 3;
1057 if ((termios->c_cflag & CSIZE) == CS7)
1058 smr_val |= 0x40;
1059 if (termios->c_cflag & PARENB)
1060 smr_val |= 0x20;
1061 if (termios->c_cflag & PARODD)
1062 smr_val |= 0x30;
1063 if (termios->c_cflag & CSTOPB)
1064 smr_val |= 0x08;
1065
1066 uart_update_timeout(port, termios->c_cflag, baud);
1067
1068 sci_out(port, SCSMR, smr_val);
1069
Linus Torvalds1da177e2005-04-16 15:20:36 -07001070 if (t > 0) {
1071 if(t >= 256) {
1072 sci_out(port, SCSMR, (sci_in(port, SCSMR) & ~3) | 1);
1073 t >>= 2;
1074 } else {
1075 sci_out(port, SCSMR, sci_in(port, SCSMR) & ~3);
1076 }
1077 sci_out(port, SCBRR, t);
1078 udelay((1000000+(baud-1)) / baud); /* Wait one bit interval */
1079 }
1080
Paul Mundtb7a76e42006-02-01 03:06:06 -08001081 if (likely(s->init_pins))
1082 s->init_pins(port, termios->c_cflag);
1083
Linus Torvalds1da177e2005-04-16 15:20:36 -07001084 sci_out(port, SCSCR, SCSCR_INIT(port));
1085
1086 if ((termios->c_cflag & CREAD) != 0)
1087 sci_start_rx(port,0);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001088}
1089
1090static const char *sci_type(struct uart_port *port)
1091{
1092 switch (port->type) {
1093 case PORT_SCI: return "sci";
1094 case PORT_SCIF: return "scif";
1095 case PORT_IRDA: return "irda";
1096 }
1097
1098 return 0;
1099}
1100
1101static void sci_release_port(struct uart_port *port)
1102{
1103 /* Nothing here yet .. */
1104}
1105
1106static int sci_request_port(struct uart_port *port)
1107{
1108 /* Nothing here yet .. */
1109 return 0;
1110}
1111
1112static void sci_config_port(struct uart_port *port, int flags)
1113{
1114 struct sci_port *s = &sci_ports[port->line];
1115
1116 port->type = s->type;
1117
Paul Mundte108b2c2006-09-27 16:32:13 +09001118 switch (port->type) {
1119 case PORT_SCI:
1120 s->init_pins = sci_init_pins_sci;
1121 break;
1122 case PORT_SCIF:
1123 s->init_pins = sci_init_pins_scif;
1124 break;
1125 case PORT_IRDA:
1126 s->init_pins = sci_init_pins_irda;
1127 break;
1128 }
1129
Linus Torvalds1da177e2005-04-16 15:20:36 -07001130#if defined(CONFIG_CPU_SUBTYPE_SH5_101) || defined(CONFIG_CPU_SUBTYPE_SH5_103)
1131 if (port->mapbase == 0)
1132 port->mapbase = onchip_remap(SCIF_ADDR_SH5, 1024, "SCIF");
1133
Paul Mundte108b2c2006-09-27 16:32:13 +09001134 port->membase = (void __iomem *)port->mapbase;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001135#endif
1136}
1137
1138static int sci_verify_port(struct uart_port *port, struct serial_struct *ser)
1139{
1140 struct sci_port *s = &sci_ports[port->line];
1141
1142 if (ser->irq != s->irqs[SCIx_TXI_IRQ] || ser->irq > NR_IRQS)
1143 return -EINVAL;
1144 if (ser->baud_base < 2400)
1145 /* No paper tape reader for Mitch.. */
1146 return -EINVAL;
1147
1148 return 0;
1149}
1150
1151static struct uart_ops sci_uart_ops = {
1152 .tx_empty = sci_tx_empty,
1153 .set_mctrl = sci_set_mctrl,
1154 .get_mctrl = sci_get_mctrl,
1155 .start_tx = sci_start_tx,
1156 .stop_tx = sci_stop_tx,
1157 .stop_rx = sci_stop_rx,
1158 .enable_ms = sci_enable_ms,
1159 .break_ctl = sci_break_ctl,
1160 .startup = sci_startup,
1161 .shutdown = sci_shutdown,
1162 .set_termios = sci_set_termios,
1163 .type = sci_type,
1164 .release_port = sci_release_port,
1165 .request_port = sci_request_port,
1166 .config_port = sci_config_port,
1167 .verify_port = sci_verify_port,
1168};
1169
Paul Mundte108b2c2006-09-27 16:32:13 +09001170static void __init sci_init_ports(void)
1171{
1172 static int first = 1;
1173 int i;
1174
1175 if (!first)
1176 return;
1177
1178 first = 0;
1179
1180 for (i = 0; i < SCI_NPORTS; i++) {
1181 sci_ports[i].port.ops = &sci_uart_ops;
1182 sci_ports[i].port.iotype = UPIO_MEM;
1183 sci_ports[i].port.line = i;
1184 sci_ports[i].port.fifosize = 1;
1185
1186#if defined(__H8300H__) || defined(__H8300S__)
1187#ifdef __H8300S__
1188 sci_ports[i].enable = h8300_sci_enable;
1189 sci_ports[i].disable = h8300_sci_disable;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001190#endif
Paul Mundte108b2c2006-09-27 16:32:13 +09001191 sci_ports[i].port.uartclk = CONFIG_CPU_CLOCK;
1192#elif defined(CONFIG_SUPERH64)
1193 sci_ports[i].port.uartclk = current_cpu_data.module_clock * 16;
1194#else
1195 /*
1196 * XXX: We should use a proper SCI/SCIF clock
1197 */
1198 {
Paul Mundt1d118562006-12-01 13:15:14 +09001199 struct clk *clk = clk_get(NULL, "module_clk");
Paul Mundte108b2c2006-09-27 16:32:13 +09001200 sci_ports[i].port.uartclk = clk_get_rate(clk) * 16;
1201 clk_put(clk);
1202 }
1203#endif
1204
1205 sci_ports[i].break_timer.data = (unsigned long)&sci_ports[i];
1206 sci_ports[i].break_timer.function = sci_break_timer;
1207
1208 init_timer(&sci_ports[i].break_timer);
1209 }
1210}
1211
1212int __init early_sci_setup(struct uart_port *port)
1213{
1214 if (unlikely(port->line > SCI_NPORTS))
1215 return -ENODEV;
1216
1217 sci_init_ports();
1218
1219 sci_ports[port->line].port.membase = port->membase;
1220 sci_ports[port->line].port.mapbase = port->mapbase;
1221 sci_ports[port->line].port.type = port->type;
1222
1223 return 0;
1224}
Linus Torvalds1da177e2005-04-16 15:20:36 -07001225
1226#ifdef CONFIG_SERIAL_SH_SCI_CONSOLE
1227/*
1228 * Print a string to the serial port trying not to disturb
1229 * any possible real use of the port...
1230 */
1231static void serial_console_write(struct console *co, const char *s,
1232 unsigned count)
1233{
1234 put_string(serial_console_port, s, count);
1235}
1236
1237static int __init serial_console_setup(struct console *co, char *options)
1238{
1239 struct uart_port *port;
1240 int baud = 115200;
1241 int bits = 8;
1242 int parity = 'n';
1243 int flow = 'n';
1244 int ret;
1245
Paul Mundte108b2c2006-09-27 16:32:13 +09001246 /*
1247 * Check whether an invalid uart number has been specified, and
1248 * if so, search for the first available port that does have
1249 * console support.
1250 */
1251 if (co->index >= SCI_NPORTS)
1252 co->index = 0;
1253
Linus Torvalds1da177e2005-04-16 15:20:36 -07001254 serial_console_port = &sci_ports[co->index];
1255 port = &serial_console_port->port;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001256
1257 /*
Paul Mundte108b2c2006-09-27 16:32:13 +09001258 * Also need to check port->type, we don't actually have any
1259 * UPIO_PORT ports, but uart_report_port() handily misreports
1260 * it anyways if we don't have a port available by the time this is
1261 * called.
Linus Torvalds1da177e2005-04-16 15:20:36 -07001262 */
Paul Mundte108b2c2006-09-27 16:32:13 +09001263 if (!port->type)
1264 return -ENODEV;
1265 if (!port->membase || !port->mapbase)
1266 return -ENODEV;
Paul Mundtb7a76e42006-02-01 03:06:06 -08001267
Paul Mundte108b2c2006-09-27 16:32:13 +09001268 port->type = serial_console_port->type;
1269
Paul Mundt005a3362007-04-26 11:45:32 +09001270#if defined(CONFIG_SUPERH) && !defined(CONFIG_SUPERH64)
1271 if (!serial_console_port->clk)
1272 serial_console_port->clk = clk_get(NULL, "module_clk");
1273#endif
1274
Paul Mundte108b2c2006-09-27 16:32:13 +09001275 if (port->flags & UPF_IOREMAP)
1276 sci_config_port(port, 0);
1277
1278 if (serial_console_port->enable)
1279 serial_console_port->enable(port);
1280
Linus Torvalds1da177e2005-04-16 15:20:36 -07001281 if (options)
1282 uart_parse_options(options, &baud, &parity, &bits, &flow);
1283
1284 ret = uart_set_options(port, co, baud, parity, bits, flow);
1285#if defined(__H8300H__) || defined(__H8300S__)
1286 /* disable rx interrupt */
1287 if (ret == 0)
1288 sci_stop_rx(port);
1289#endif
1290 return ret;
1291}
1292
1293static struct console serial_console = {
1294 .name = "ttySC",
1295 .device = uart_console_device,
1296 .write = serial_console_write,
1297 .setup = serial_console_setup,
Paul Mundtfa5da2f2007-03-08 17:27:37 +09001298 .flags = CON_PRINTBUFFER,
Linus Torvalds1da177e2005-04-16 15:20:36 -07001299 .index = -1,
1300 .data = &sci_uart_driver,
1301};
1302
1303static int __init sci_console_init(void)
1304{
Paul Mundte108b2c2006-09-27 16:32:13 +09001305 sci_init_ports();
Linus Torvalds1da177e2005-04-16 15:20:36 -07001306 register_console(&serial_console);
1307 return 0;
1308}
Linus Torvalds1da177e2005-04-16 15:20:36 -07001309console_initcall(sci_console_init);
1310#endif /* CONFIG_SERIAL_SH_SCI_CONSOLE */
1311
Paul Mundt68362e02007-09-11 15:27:29 +09001312#ifdef CONFIG_SH_KGDB_CONSOLE
Linus Torvalds1da177e2005-04-16 15:20:36 -07001313/*
1314 * FIXME: Most of this can go away.. at the moment, we rely on
1315 * arch/sh/kernel/setup.c to do the command line parsing for kgdb, though
1316 * most of that can easily be done here instead.
1317 *
1318 * For the time being, just accept the values that were parsed earlier..
1319 */
1320static void __init kgdb_console_get_options(struct uart_port *port, int *baud,
1321 int *parity, int *bits)
1322{
1323 *baud = kgdb_baud;
1324 *parity = tolower(kgdb_parity);
1325 *bits = kgdb_bits - '0';
1326}
1327
1328/*
1329 * The naming here is somewhat misleading, since kgdb_console_setup() takes
1330 * care of the early-on initialization for kgdb, regardless of whether we
1331 * actually use kgdb as a console or not.
1332 *
1333 * On the plus side, this lets us kill off the old kgdb_sci_setup() nonsense.
1334 */
1335int __init kgdb_console_setup(struct console *co, char *options)
1336{
1337 struct uart_port *port = &sci_ports[kgdb_portnum].port;
1338 int baud = 38400;
1339 int bits = 8;
1340 int parity = 'n';
1341 int flow = 'n';
1342
Paul Mundtb7a76e42006-02-01 03:06:06 -08001343 if (co->index != kgdb_portnum)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001344 co->index = kgdb_portnum;
1345
Paul Mundtfa5da2f2007-03-08 17:27:37 +09001346 kgdb_sci_port = &sci_ports[co->index];
1347 port = &kgdb_sci_port->port;
1348
1349 /*
1350 * Also need to check port->type, we don't actually have any
1351 * UPIO_PORT ports, but uart_report_port() handily misreports
1352 * it anyways if we don't have a port available by the time this is
1353 * called.
1354 */
1355 if (!port->type)
1356 return -ENODEV;
1357 if (!port->membase || !port->mapbase)
1358 return -ENODEV;
1359
Linus Torvalds1da177e2005-04-16 15:20:36 -07001360 if (options)
1361 uart_parse_options(options, &baud, &parity, &bits, &flow);
1362 else
1363 kgdb_console_get_options(port, &baud, &parity, &bits);
1364
1365 kgdb_getchar = kgdb_sci_getchar;
1366 kgdb_putchar = kgdb_sci_putchar;
1367
1368 return uart_set_options(port, co, baud, parity, bits, flow);
1369}
Linus Torvalds1da177e2005-04-16 15:20:36 -07001370
Linus Torvalds1da177e2005-04-16 15:20:36 -07001371static struct console kgdb_console = {
Paul Mundtfa5da2f2007-03-08 17:27:37 +09001372 .name = "ttySC",
1373 .device = uart_console_device,
1374 .write = kgdb_console_write,
1375 .setup = kgdb_console_setup,
1376 .flags = CON_PRINTBUFFER,
1377 .index = -1,
Linus Torvalds1da177e2005-04-16 15:20:36 -07001378 .data = &sci_uart_driver,
1379};
1380
1381/* Register the KGDB console so we get messages (d'oh!) */
1382static int __init kgdb_console_init(void)
1383{
Paul Mundte108b2c2006-09-27 16:32:13 +09001384 sci_init_ports();
Linus Torvalds1da177e2005-04-16 15:20:36 -07001385 register_console(&kgdb_console);
1386 return 0;
1387}
Linus Torvalds1da177e2005-04-16 15:20:36 -07001388console_initcall(kgdb_console_init);
1389#endif /* CONFIG_SH_KGDB_CONSOLE */
1390
1391#if defined(CONFIG_SH_KGDB_CONSOLE)
1392#define SCI_CONSOLE &kgdb_console
1393#elif defined(CONFIG_SERIAL_SH_SCI_CONSOLE)
1394#define SCI_CONSOLE &serial_console
1395#else
Paul Mundtb7a76e42006-02-01 03:06:06 -08001396#define SCI_CONSOLE 0
Linus Torvalds1da177e2005-04-16 15:20:36 -07001397#endif
1398
1399static char banner[] __initdata =
1400 KERN_INFO "SuperH SCI(F) driver initialized\n";
1401
1402static struct uart_driver sci_uart_driver = {
1403 .owner = THIS_MODULE,
1404 .driver_name = "sci",
Linus Torvalds1da177e2005-04-16 15:20:36 -07001405 .dev_name = "ttySC",
1406 .major = SCI_MAJOR,
1407 .minor = SCI_MINOR_START,
Paul Mundte108b2c2006-09-27 16:32:13 +09001408 .nr = SCI_NPORTS,
Linus Torvalds1da177e2005-04-16 15:20:36 -07001409 .cons = SCI_CONSOLE,
1410};
1411
Paul Mundte108b2c2006-09-27 16:32:13 +09001412/*
1413 * Register a set of serial devices attached to a platform device. The
1414 * list is terminated with a zero flags entry, which means we expect
1415 * all entries to have at least UPF_BOOT_AUTOCONF set. Platforms that need
1416 * remapping (such as sh64) should also set UPF_IOREMAP.
1417 */
1418static int __devinit sci_probe(struct platform_device *dev)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001419{
Paul Mundte108b2c2006-09-27 16:32:13 +09001420 struct plat_sci_port *p = dev->dev.platform_data;
1421 int i;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001422
Paul Mundt32351a22007-03-12 14:38:59 +09001423 for (i = 0; p && p->flags != 0; p++, i++) {
Paul Mundte108b2c2006-09-27 16:32:13 +09001424 struct sci_port *sciport = &sci_ports[i];
Linus Torvalds1da177e2005-04-16 15:20:36 -07001425
Paul Mundt32351a22007-03-12 14:38:59 +09001426 /* Sanity check */
1427 if (unlikely(i == SCI_NPORTS)) {
1428 dev_notice(&dev->dev, "Attempting to register port "
1429 "%d when only %d are available.\n",
1430 i+1, SCI_NPORTS);
1431 dev_notice(&dev->dev, "Consider bumping "
1432 "CONFIG_SERIAL_SH_SCI_NR_UARTS!\n");
1433 break;
1434 }
1435
Paul Mundte108b2c2006-09-27 16:32:13 +09001436 sciport->port.mapbase = p->mapbase;
Paul Mundtb7a76e42006-02-01 03:06:06 -08001437
Paul Mundte108b2c2006-09-27 16:32:13 +09001438 /*
1439 * For the simple (and majority of) cases where we don't need
1440 * to do any remapping, just cast the cookie directly.
1441 */
1442 if (p->mapbase && !p->membase && !(p->flags & UPF_IOREMAP))
1443 p->membase = (void __iomem *)p->mapbase;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001444
Paul Mundte108b2c2006-09-27 16:32:13 +09001445 sciport->port.membase = p->membase;
1446
1447 sciport->port.irq = p->irqs[SCIx_TXI_IRQ];
1448 sciport->port.flags = p->flags;
1449 sciport->port.dev = &dev->dev;
1450
1451 sciport->type = sciport->port.type = p->type;
1452
1453 memcpy(&sciport->irqs, &p->irqs, sizeof(p->irqs));
1454
1455 uart_add_one_port(&sci_uart_driver, &sciport->port);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001456 }
1457
Paul Mundtfa5da2f2007-03-08 17:27:37 +09001458#if defined(CONFIG_SH_KGDB) && !defined(CONFIG_SH_KGDB_CONSOLE)
1459 kgdb_sci_port = &sci_ports[kgdb_portnum];
1460 kgdb_getchar = kgdb_sci_getchar;
1461 kgdb_putchar = kgdb_sci_putchar;
1462#endif
1463
Linus Torvalds1da177e2005-04-16 15:20:36 -07001464#ifdef CONFIG_CPU_FREQ
1465 cpufreq_register_notifier(&sci_nb, CPUFREQ_TRANSITION_NOTIFIER);
Paul Mundte289fd92007-08-08 18:09:13 +09001466 dev_info(&dev->dev, "CPU frequency notifier registered\n");
Linus Torvalds1da177e2005-04-16 15:20:36 -07001467#endif
1468
1469#ifdef CONFIG_SH_STANDARD_BIOS
1470 sh_bios_gdb_detach();
1471#endif
1472
Paul Mundte108b2c2006-09-27 16:32:13 +09001473 return 0;
1474}
1475
1476static int __devexit sci_remove(struct platform_device *dev)
1477{
1478 int i;
1479
1480 for (i = 0; i < SCI_NPORTS; i++)
1481 uart_remove_one_port(&sci_uart_driver, &sci_ports[i].port);
1482
1483 return 0;
1484}
1485
1486static int sci_suspend(struct platform_device *dev, pm_message_t state)
1487{
1488 int i;
1489
1490 for (i = 0; i < SCI_NPORTS; i++) {
1491 struct sci_port *p = &sci_ports[i];
1492
1493 if (p->type != PORT_UNKNOWN && p->port.dev == &dev->dev)
1494 uart_suspend_port(&sci_uart_driver, &p->port);
1495 }
1496
1497 return 0;
1498}
1499
1500static int sci_resume(struct platform_device *dev)
1501{
1502 int i;
1503
1504 for (i = 0; i < SCI_NPORTS; i++) {
1505 struct sci_port *p = &sci_ports[i];
1506
1507 if (p->type != PORT_UNKNOWN && p->port.dev == &dev->dev)
1508 uart_resume_port(&sci_uart_driver, &p->port);
1509 }
1510
1511 return 0;
1512}
1513
1514static struct platform_driver sci_driver = {
1515 .probe = sci_probe,
1516 .remove = __devexit_p(sci_remove),
1517 .suspend = sci_suspend,
1518 .resume = sci_resume,
1519 .driver = {
1520 .name = "sh-sci",
1521 .owner = THIS_MODULE,
1522 },
1523};
1524
1525static int __init sci_init(void)
1526{
1527 int ret;
1528
1529 printk(banner);
1530
1531 sci_init_ports();
1532
1533 ret = uart_register_driver(&sci_uart_driver);
1534 if (likely(ret == 0)) {
1535 ret = platform_driver_register(&sci_driver);
1536 if (unlikely(ret))
1537 uart_unregister_driver(&sci_uart_driver);
1538 }
1539
Linus Torvalds1da177e2005-04-16 15:20:36 -07001540 return ret;
1541}
1542
1543static void __exit sci_exit(void)
1544{
Paul Mundte108b2c2006-09-27 16:32:13 +09001545 platform_driver_unregister(&sci_driver);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001546 uart_unregister_driver(&sci_uart_driver);
1547}
1548
1549module_init(sci_init);
1550module_exit(sci_exit);
1551
Paul Mundte108b2c2006-09-27 16:32:13 +09001552MODULE_LICENSE("GPL");