blob: 9d244d1644e14031d9cf24280c7280449a9a15cc [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>
Paul Mundt96de1a82008-02-26 14:52:45 +090044#include <linux/serial_sci.h>
Linus Torvalds1da177e2005-04-16 15:20:36 -070045
46#ifdef CONFIG_CPU_FREQ
47#include <linux/notifier.h>
48#include <linux/cpufreq.h>
49#endif
50
Paul Mundtb7a76e42006-02-01 03:06:06 -080051#if defined(CONFIG_SUPERH) && !defined(CONFIG_SUPERH64)
Paul Mundtfa5da2f2007-03-08 17:27:37 +090052#include <linux/ctype.h>
Paul Mundtb7a76e42006-02-01 03:06:06 -080053#include <asm/clock.h>
Paul Mundte108b2c2006-09-27 16:32:13 +090054#include <asm/sh_bios.h>
55#include <asm/kgdb.h>
Paul Mundtb7a76e42006-02-01 03:06:06 -080056#endif
Linus Torvalds1da177e2005-04-16 15:20:36 -070057
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}
Yoshihiro Shimoda31a49c42007-12-26 11:45:06 +0900305#elif defined(CONFIG_CPU_SUBTYPE_SH7720) || defined(CONFIG_CPU_SUBTYPE_SH7721)
Markus Brunner3ea6bc32007-08-20 08:59:33 +0900306static 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 {
Magnus Damm9109a302008-02-08 17:31:24 +0900396#if defined(CONFIG_CPU_SUBTYPE_SH7343) || defined(CONFIG_CPU_SUBTYPE_SH7366)
Paul Mundte108b2c2006-09-27 16:32:13 +0900397 /* Nothing */
Yoshihiro Shimoda7d740a02008-01-07 14:40:07 +0900398#elif defined(CONFIG_CPU_SUBTYPE_SH7763) || \
399 defined(CONFIG_CPU_SUBTYPE_SH7780) || \
Paul Mundt2b1bd1a2007-06-20 18:27:10 +0900400 defined(CONFIG_CPU_SUBTYPE_SH7785) || \
401 defined(CONFIG_CPU_SUBTYPE_SHX3)
Paul Mundtb7a76e42006-02-01 03:06:06 -0800402 ctrl_outw(0x0080, SCSPTR0); /* Set RTS = 1 */
403#else
Linus Torvalds1da177e2005-04-16 15:20:36 -0700404 ctrl_outw(0x0080, SCSPTR2); /* Set RTS = 1 */
Paul Mundtb7a76e42006-02-01 03:06:06 -0800405#endif
Linus Torvalds1da177e2005-04-16 15:20:36 -0700406 }
407 sci_out(port, SCFCR, fcr_val);
408}
Paul Mundte108b2c2006-09-27 16:32:13 +0900409#endif
Linus Torvalds1da177e2005-04-16 15:20:36 -0700410
Paul Mundt32351a22007-03-12 14:38:59 +0900411#if defined(CONFIG_CPU_SUBTYPE_SH7760) || \
Yoshihiro Shimoda7d740a02008-01-07 14:40:07 +0900412 defined(CONFIG_CPU_SUBTYPE_SH7763) || \
Paul Mundt32351a22007-03-12 14:38:59 +0900413 defined(CONFIG_CPU_SUBTYPE_SH7780) || \
414 defined(CONFIG_CPU_SUBTYPE_SH7785)
Paul Mundte108b2c2006-09-27 16:32:13 +0900415static inline int scif_txroom(struct uart_port *port)
416{
Yutaro Ebiharacae167d2008-03-11 13:58:50 +0900417 return SCIF_TXROOM_MAX - (sci_in(port, SCTFDR) & 0xff);
Paul Mundte108b2c2006-09-27 16:32:13 +0900418}
419
420static inline int scif_rxroom(struct uart_port *port)
421{
Yutaro Ebiharacae167d2008-03-11 13:58:50 +0900422 return sci_in(port, SCRFDR) & 0xff;
Paul Mundte108b2c2006-09-27 16:32:13 +0900423}
424#else
425static inline int scif_txroom(struct uart_port *port)
426{
427 return SCIF_TXROOM_MAX - (sci_in(port, SCFDR) >> 8);
428}
429
430static inline int scif_rxroom(struct uart_port *port)
431{
432 return sci_in(port, SCFDR) & SCIF_RFDC_MASK;
433}
Linus Torvalds1da177e2005-04-16 15:20:36 -0700434#endif
435#endif /* SCIF_ONLY || SCI_AND_SCIF */
436
Paul Mundte108b2c2006-09-27 16:32:13 +0900437static inline int sci_txroom(struct uart_port *port)
438{
439 return ((sci_in(port, SCxSR) & SCI_TDRE) != 0);
440}
441
442static inline int sci_rxroom(struct uart_port *port)
443{
444 return ((sci_in(port, SCxSR) & SCxSR_RDxF(port)) != 0);
445}
446
Linus Torvalds1da177e2005-04-16 15:20:36 -0700447/* ********************************************************************** *
448 * the interrupt related routines *
449 * ********************************************************************** */
450
451static void sci_transmit_chars(struct uart_port *port)
452{
453 struct circ_buf *xmit = &port->info->xmit;
454 unsigned int stopped = uart_tx_stopped(port);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700455 unsigned short status;
456 unsigned short ctrl;
Paul Mundte108b2c2006-09-27 16:32:13 +0900457 int count;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700458
459 status = sci_in(port, SCxSR);
460 if (!(status & SCxSR_TDxE(port))) {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700461 ctrl = sci_in(port, SCSCR);
462 if (uart_circ_empty(xmit)) {
463 ctrl &= ~SCI_CTRL_FLAGS_TIE;
464 } else {
465 ctrl |= SCI_CTRL_FLAGS_TIE;
466 }
467 sci_out(port, SCSCR, ctrl);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700468 return;
469 }
470
Paul Mundte108b2c2006-09-27 16:32:13 +0900471#ifndef SCI_ONLY
472 if (port->type == PORT_SCIF)
473 count = scif_txroom(port);
474 else
Paul Mundtb7a76e42006-02-01 03:06:06 -0800475#endif
Paul Mundte108b2c2006-09-27 16:32:13 +0900476 count = sci_txroom(port);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700477
478 do {
479 unsigned char c;
480
481 if (port->x_char) {
482 c = port->x_char;
483 port->x_char = 0;
484 } else if (!uart_circ_empty(xmit) && !stopped) {
485 c = xmit->buf[xmit->tail];
486 xmit->tail = (xmit->tail + 1) & (UART_XMIT_SIZE - 1);
487 } else {
488 break;
489 }
490
491 sci_out(port, SCxTDR, c);
492
493 port->icount.tx++;
494 } while (--count > 0);
495
496 sci_out(port, SCxSR, SCxSR_TDxE_CLEAR(port));
497
498 if (uart_circ_chars_pending(xmit) < WAKEUP_CHARS)
499 uart_write_wakeup(port);
500 if (uart_circ_empty(xmit)) {
Russell Kingb129a8c2005-08-31 10:12:14 +0100501 sci_stop_tx(port);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700502 } else {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700503 ctrl = sci_in(port, SCSCR);
504
505#if !defined(SCI_ONLY)
506 if (port->type == PORT_SCIF) {
507 sci_in(port, SCxSR); /* Dummy read */
508 sci_out(port, SCxSR, SCxSR_TDxE_CLEAR(port));
509 }
510#endif
511
512 ctrl |= SCI_CTRL_FLAGS_TIE;
513 sci_out(port, SCSCR, ctrl);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700514 }
515}
516
517/* On SH3, SCIF may read end-of-break as a space->mark char */
518#define STEPFN(c) ({int __c=(c); (((__c-1)|(__c)) == -1); })
519
David Howells7d12e782006-10-05 14:55:46 +0100520static inline void sci_receive_chars(struct uart_port *port)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700521{
Paul Mundte108b2c2006-09-27 16:32:13 +0900522 struct sci_port *sci_port = (struct sci_port *)port;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700523 struct tty_struct *tty = port->info->tty;
524 int i, count, copied = 0;
525 unsigned short status;
Alan Cox33f0f882006-01-09 20:54:13 -0800526 unsigned char flag;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700527
528 status = sci_in(port, SCxSR);
529 if (!(status & SCxSR_RDxF(port)))
530 return;
531
532 while (1) {
533#if !defined(SCI_ONLY)
Paul Mundte108b2c2006-09-27 16:32:13 +0900534 if (port->type == PORT_SCIF)
535 count = scif_rxroom(port);
536 else
Paul Mundtb7a76e42006-02-01 03:06:06 -0800537#endif
Paul Mundte108b2c2006-09-27 16:32:13 +0900538 count = sci_rxroom(port);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700539
540 /* Don't copy more bytes than there is room for in the buffer */
Alan Cox33f0f882006-01-09 20:54:13 -0800541 count = tty_buffer_request_room(tty, count);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700542
543 /* If for any reason we can't copy more data, we're done! */
544 if (count == 0)
545 break;
546
547 if (port->type == PORT_SCI) {
548 char c = sci_in(port, SCxRDR);
David Howells7d12e782006-10-05 14:55:46 +0100549 if (uart_handle_sysrq_char(port, c) || sci_port->break_flag)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700550 count = 0;
Paul Mundte108b2c2006-09-27 16:32:13 +0900551 else {
552 tty_insert_flip_char(tty, c, TTY_NORMAL);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700553 }
554 } else {
555 for (i=0; i<count; i++) {
556 char c = sci_in(port, SCxRDR);
557 status = sci_in(port, SCxSR);
558#if defined(CONFIG_CPU_SH3)
559 /* Skip "chars" during break */
Paul Mundte108b2c2006-09-27 16:32:13 +0900560 if (sci_port->break_flag) {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700561 if ((c == 0) &&
562 (status & SCxSR_FER(port))) {
563 count--; i--;
564 continue;
565 }
Paul Mundte108b2c2006-09-27 16:32:13 +0900566
Linus Torvalds1da177e2005-04-16 15:20:36 -0700567 /* Nonzero => end-of-break */
568 pr_debug("scif: debounce<%02x>\n", c);
Paul Mundte108b2c2006-09-27 16:32:13 +0900569 sci_port->break_flag = 0;
570
Linus Torvalds1da177e2005-04-16 15:20:36 -0700571 if (STEPFN(c)) {
572 count--; i--;
573 continue;
574 }
575 }
576#endif /* CONFIG_CPU_SH3 */
David Howells7d12e782006-10-05 14:55:46 +0100577 if (uart_handle_sysrq_char(port, c)) {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700578 count--; i--;
579 continue;
580 }
581
582 /* Store data and status */
Linus Torvalds1da177e2005-04-16 15:20:36 -0700583 if (status&SCxSR_FER(port)) {
Alan Cox33f0f882006-01-09 20:54:13 -0800584 flag = TTY_FRAME;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700585 pr_debug("sci: frame error\n");
586 } else if (status&SCxSR_PER(port)) {
Alan Cox33f0f882006-01-09 20:54:13 -0800587 flag = TTY_PARITY;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700588 pr_debug("sci: parity error\n");
Alan Cox33f0f882006-01-09 20:54:13 -0800589 } else
590 flag = TTY_NORMAL;
591 tty_insert_flip_char(tty, c, flag);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700592 }
593 }
594
595 sci_in(port, SCxSR); /* dummy read */
596 sci_out(port, SCxSR, SCxSR_RDxF_CLEAR(port));
597
Linus Torvalds1da177e2005-04-16 15:20:36 -0700598 copied += count;
599 port->icount.rx += count;
600 }
601
602 if (copied) {
603 /* Tell the rest of the system the news. New characters! */
604 tty_flip_buffer_push(tty);
605 } else {
606 sci_in(port, SCxSR); /* dummy read */
607 sci_out(port, SCxSR, SCxSR_RDxF_CLEAR(port));
608 }
609}
610
611#define SCI_BREAK_JIFFIES (HZ/20)
612/* The sci generates interrupts during the break,
613 * 1 per millisecond or so during the break period, for 9600 baud.
614 * So dont bother disabling interrupts.
615 * But dont want more than 1 break event.
616 * Use a kernel timer to periodically poll the rx line until
617 * the break is finished.
618 */
619static void sci_schedule_break_timer(struct sci_port *port)
620{
621 port->break_timer.expires = jiffies + SCI_BREAK_JIFFIES;
622 add_timer(&port->break_timer);
623}
624/* Ensure that two consecutive samples find the break over. */
625static void sci_break_timer(unsigned long data)
626{
Paul Mundte108b2c2006-09-27 16:32:13 +0900627 struct sci_port *port = (struct sci_port *)data;
628
629 if (sci_rxd_in(&port->port) == 0) {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700630 port->break_flag = 1;
Paul Mundte108b2c2006-09-27 16:32:13 +0900631 sci_schedule_break_timer(port);
632 } else if (port->break_flag == 1) {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700633 /* break is over. */
634 port->break_flag = 2;
Paul Mundte108b2c2006-09-27 16:32:13 +0900635 sci_schedule_break_timer(port);
636 } else
637 port->break_flag = 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700638}
639
640static inline int sci_handle_errors(struct uart_port *port)
641{
642 int copied = 0;
643 unsigned short status = sci_in(port, SCxSR);
644 struct tty_struct *tty = port->info->tty;
645
Paul Mundte108b2c2006-09-27 16:32:13 +0900646 if (status & SCxSR_ORER(port)) {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700647 /* overrun error */
Paul Mundte108b2c2006-09-27 16:32:13 +0900648 if (tty_insert_flip_char(tty, 0, TTY_OVERRUN))
Alan Cox33f0f882006-01-09 20:54:13 -0800649 copied++;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700650 pr_debug("sci: overrun error\n");
651 }
652
Paul Mundte108b2c2006-09-27 16:32:13 +0900653 if (status & SCxSR_FER(port)) {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700654 if (sci_rxd_in(port) == 0) {
655 /* Notify of BREAK */
Paul Mundte108b2c2006-09-27 16:32:13 +0900656 struct sci_port *sci_port = (struct sci_port *)port;
657
658 if (!sci_port->break_flag) {
659 sci_port->break_flag = 1;
660 sci_schedule_break_timer(sci_port);
661
Linus Torvalds1da177e2005-04-16 15:20:36 -0700662 /* Do sysrq handling. */
Paul Mundte108b2c2006-09-27 16:32:13 +0900663 if (uart_handle_break(port))
Linus Torvalds1da177e2005-04-16 15:20:36 -0700664 return 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700665 pr_debug("sci: BREAK detected\n");
Paul Mundte108b2c2006-09-27 16:32:13 +0900666 if (tty_insert_flip_char(tty, 0, TTY_BREAK))
Alan Cox33f0f882006-01-09 20:54:13 -0800667 copied++;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700668 }
Paul Mundte108b2c2006-09-27 16:32:13 +0900669 } else {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700670 /* frame error */
Paul Mundte108b2c2006-09-27 16:32:13 +0900671 if (tty_insert_flip_char(tty, 0, TTY_FRAME))
Alan Cox33f0f882006-01-09 20:54:13 -0800672 copied++;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700673 pr_debug("sci: frame error\n");
674 }
675 }
676
Paul Mundte108b2c2006-09-27 16:32:13 +0900677 if (status & SCxSR_PER(port)) {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700678 /* parity error */
Paul Mundte108b2c2006-09-27 16:32:13 +0900679 if (tty_insert_flip_char(tty, 0, TTY_PARITY))
680 copied++;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700681 pr_debug("sci: parity error\n");
682 }
683
Alan Cox33f0f882006-01-09 20:54:13 -0800684 if (copied)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700685 tty_flip_buffer_push(tty);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700686
687 return copied;
688}
689
690static inline int sci_handle_breaks(struct uart_port *port)
691{
692 int copied = 0;
693 unsigned short status = sci_in(port, SCxSR);
694 struct tty_struct *tty = port->info->tty;
695 struct sci_port *s = &sci_ports[port->line];
696
Paul Mundt0b3d4ef2007-03-14 13:22:37 +0900697 if (uart_handle_break(port))
698 return 0;
699
Paul Mundtb7a76e42006-02-01 03:06:06 -0800700 if (!s->break_flag && status & SCxSR_BRK(port)) {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700701#if defined(CONFIG_CPU_SH3)
702 /* Debounce break */
703 s->break_flag = 1;
704#endif
705 /* Notify of BREAK */
Paul Mundte108b2c2006-09-27 16:32:13 +0900706 if (tty_insert_flip_char(tty, 0, TTY_BREAK))
Alan Cox33f0f882006-01-09 20:54:13 -0800707 copied++;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700708 pr_debug("sci: BREAK detected\n");
709 }
710
711#if defined(SCIF_ORER)
712 /* XXX: Handle SCIF overrun error */
713 if (port->type == PORT_SCIF && (sci_in(port, SCLSR) & SCIF_ORER) != 0) {
714 sci_out(port, SCLSR, 0);
Paul Mundte108b2c2006-09-27 16:32:13 +0900715 if (tty_insert_flip_char(tty, 0, TTY_OVERRUN)) {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700716 copied++;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700717 pr_debug("sci: overrun error\n");
718 }
719 }
720#endif
721
Alan Cox33f0f882006-01-09 20:54:13 -0800722 if (copied)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700723 tty_flip_buffer_push(tty);
Paul Mundte108b2c2006-09-27 16:32:13 +0900724
Linus Torvalds1da177e2005-04-16 15:20:36 -0700725 return copied;
726}
727
David Howells7d12e782006-10-05 14:55:46 +0100728static irqreturn_t sci_rx_interrupt(int irq, void *port)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700729{
Linus Torvalds1da177e2005-04-16 15:20:36 -0700730 /* I think sci_receive_chars has to be called irrespective
731 * of whether the I_IXOFF is set, otherwise, how is the interrupt
732 * to be disabled?
733 */
David Howells7d12e782006-10-05 14:55:46 +0100734 sci_receive_chars(port);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700735
736 return IRQ_HANDLED;
737}
738
David Howells7d12e782006-10-05 14:55:46 +0100739static irqreturn_t sci_tx_interrupt(int irq, void *ptr)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700740{
741 struct uart_port *port = ptr;
742
Paul Mundte108b2c2006-09-27 16:32:13 +0900743 spin_lock_irq(&port->lock);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700744 sci_transmit_chars(port);
Paul Mundte108b2c2006-09-27 16:32:13 +0900745 spin_unlock_irq(&port->lock);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700746
747 return IRQ_HANDLED;
748}
749
David Howells7d12e782006-10-05 14:55:46 +0100750static irqreturn_t sci_er_interrupt(int irq, void *ptr)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700751{
752 struct uart_port *port = ptr;
753
754 /* Handle errors */
755 if (port->type == PORT_SCI) {
756 if (sci_handle_errors(port)) {
757 /* discard character in rx buffer */
758 sci_in(port, SCxSR);
759 sci_out(port, SCxSR, SCxSR_RDxF_CLEAR(port));
760 }
761 } else {
762#if defined(SCIF_ORER)
763 if((sci_in(port, SCLSR) & SCIF_ORER) != 0) {
764 struct tty_struct *tty = port->info->tty;
765
766 sci_out(port, SCLSR, 0);
Alan Cox33f0f882006-01-09 20:54:13 -0800767 tty_insert_flip_char(tty, 0, TTY_OVERRUN);
768 tty_flip_buffer_push(tty);
769 pr_debug("scif: overrun error\n");
Linus Torvalds1da177e2005-04-16 15:20:36 -0700770 }
771#endif
David Howells7d12e782006-10-05 14:55:46 +0100772 sci_rx_interrupt(irq, ptr);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700773 }
774
775 sci_out(port, SCxSR, SCxSR_ERROR_CLEAR(port));
776
777 /* Kick the transmission */
David Howells7d12e782006-10-05 14:55:46 +0100778 sci_tx_interrupt(irq, ptr);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700779
780 return IRQ_HANDLED;
781}
782
David Howells7d12e782006-10-05 14:55:46 +0100783static irqreturn_t sci_br_interrupt(int irq, void *ptr)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700784{
785 struct uart_port *port = ptr;
786
787 /* Handle BREAKs */
788 sci_handle_breaks(port);
789 sci_out(port, SCxSR, SCxSR_BREAK_CLEAR(port));
790
791 return IRQ_HANDLED;
792}
793
David Howells7d12e782006-10-05 14:55:46 +0100794static irqreturn_t sci_mpxed_interrupt(int irq, void *ptr)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700795{
796 unsigned short ssr_status, scr_status;
797 struct uart_port *port = ptr;
798
799 ssr_status = sci_in(port,SCxSR);
800 scr_status = sci_in(port,SCSCR);
801
802 /* Tx Interrupt */
Paul Mundte108b2c2006-09-27 16:32:13 +0900803 if ((ssr_status & 0x0020) && (scr_status & 0x0080))
David Howells7d12e782006-10-05 14:55:46 +0100804 sci_tx_interrupt(irq, ptr);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700805 /* Rx Interrupt */
Paul Mundte108b2c2006-09-27 16:32:13 +0900806 if ((ssr_status & 0x0002) && (scr_status & 0x0040))
David Howells7d12e782006-10-05 14:55:46 +0100807 sci_rx_interrupt(irq, ptr);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700808 /* Error Interrupt */
Paul Mundte108b2c2006-09-27 16:32:13 +0900809 if ((ssr_status & 0x0080) && (scr_status & 0x0400))
David Howells7d12e782006-10-05 14:55:46 +0100810 sci_er_interrupt(irq, ptr);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700811 /* Break Interrupt */
Paul Mundte108b2c2006-09-27 16:32:13 +0900812 if ((ssr_status & 0x0010) && (scr_status & 0x0200))
David Howells7d12e782006-10-05 14:55:46 +0100813 sci_br_interrupt(irq, ptr);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700814
815 return IRQ_HANDLED;
816}
817
818#ifdef CONFIG_CPU_FREQ
819/*
820 * Here we define a transistion notifier so that we can update all of our
821 * ports' baud rate when the peripheral clock changes.
822 */
Paul Mundte108b2c2006-09-27 16:32:13 +0900823static int sci_notifier(struct notifier_block *self,
824 unsigned long phase, void *p)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700825{
826 struct cpufreq_freqs *freqs = p;
827 int i;
828
829 if ((phase == CPUFREQ_POSTCHANGE) ||
830 (phase == CPUFREQ_RESUMECHANGE)){
831 for (i = 0; i < SCI_NPORTS; i++) {
832 struct uart_port *port = &sci_ports[i].port;
Paul Mundtb7a76e42006-02-01 03:06:06 -0800833 struct clk *clk;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700834
835 /*
836 * Update the uartclk per-port if frequency has
837 * changed, since it will no longer necessarily be
838 * consistent with the old frequency.
839 *
840 * Really we want to be able to do something like
841 * uart_change_speed() or something along those lines
842 * here to implicitly reset the per-port baud rate..
843 *
844 * Clean this up later..
845 */
Paul Mundt1d118562006-12-01 13:15:14 +0900846 clk = clk_get(NULL, "module_clk");
Paul Mundtb7a76e42006-02-01 03:06:06 -0800847 port->uartclk = clk_get_rate(clk) * 16;
848 clk_put(clk);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700849 }
850
Paul Mundte108b2c2006-09-27 16:32:13 +0900851 printk(KERN_INFO "%s: got a postchange notification "
852 "for cpu %d (old %d, new %d)\n",
853 __FUNCTION__, freqs->cpu, freqs->old, freqs->new);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700854 }
855
856 return NOTIFY_OK;
857}
858
859static struct notifier_block sci_nb = { &sci_notifier, NULL, 0 };
860#endif /* CONFIG_CPU_FREQ */
861
862static int sci_request_irq(struct sci_port *port)
863{
864 int i;
David Howells7d12e782006-10-05 14:55:46 +0100865 irqreturn_t (*handlers[4])(int irq, void *ptr) = {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700866 sci_er_interrupt, sci_rx_interrupt, sci_tx_interrupt,
867 sci_br_interrupt,
868 };
869 const char *desc[] = { "SCI Receive Error", "SCI Receive Data Full",
870 "SCI Transmit Data Empty", "SCI Break" };
871
872 if (port->irqs[0] == port->irqs[1]) {
873 if (!port->irqs[0]) {
874 printk(KERN_ERR "sci: Cannot allocate irq.(IRQ=0)\n");
875 return -ENODEV;
876 }
Paul Mundte108b2c2006-09-27 16:32:13 +0900877
878 if (request_irq(port->irqs[0], sci_mpxed_interrupt,
Paul Mundt35f3c512006-10-06 15:31:16 +0900879 IRQF_DISABLED, "sci", port)) {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700880 printk(KERN_ERR "sci: Cannot allocate irq.\n");
881 return -ENODEV;
882 }
883 } else {
884 for (i = 0; i < ARRAY_SIZE(handlers); i++) {
885 if (!port->irqs[i])
886 continue;
Paul Mundte108b2c2006-09-27 16:32:13 +0900887 if (request_irq(port->irqs[i], handlers[i],
Paul Mundt35f3c512006-10-06 15:31:16 +0900888 IRQF_DISABLED, desc[i], port)) {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700889 printk(KERN_ERR "sci: Cannot allocate irq.\n");
890 return -ENODEV;
891 }
892 }
893 }
894
895 return 0;
896}
897
898static void sci_free_irq(struct sci_port *port)
899{
900 int i;
901
902 if (port->irqs[0] == port->irqs[1]) {
903 if (!port->irqs[0])
904 printk("sci: sci_free_irq error\n");
905 else
906 free_irq(port->irqs[0], port);
907 } else {
908 for (i = 0; i < ARRAY_SIZE(port->irqs); i++) {
909 if (!port->irqs[i])
910 continue;
911
912 free_irq(port->irqs[i], port);
913 }
914 }
915}
916
917static unsigned int sci_tx_empty(struct uart_port *port)
918{
919 /* Can't detect */
920 return TIOCSER_TEMT;
921}
922
923static void sci_set_mctrl(struct uart_port *port, unsigned int mctrl)
924{
925 /* This routine is used for seting signals of: DTR, DCD, CTS/RTS */
926 /* We use SCIF's hardware for CTS/RTS, so don't need any for that. */
927 /* If you have signals for DTR and DCD, please implement here. */
928}
929
930static unsigned int sci_get_mctrl(struct uart_port *port)
931{
932 /* This routine is used for geting signals of: DTR, DCD, DSR, RI,
933 and CTS/RTS */
934
935 return TIOCM_DTR | TIOCM_RTS | TIOCM_DSR;
936}
937
Russell Kingb129a8c2005-08-31 10:12:14 +0100938static void sci_start_tx(struct uart_port *port)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700939{
Paul Mundte108b2c2006-09-27 16:32:13 +0900940 unsigned short ctrl;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700941
Paul Mundte108b2c2006-09-27 16:32:13 +0900942 /* Set TIE (Transmit Interrupt Enable) bit in SCSCR */
943 ctrl = sci_in(port, SCSCR);
944 ctrl |= SCI_CTRL_FLAGS_TIE;
945 sci_out(port, SCSCR, ctrl);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700946}
947
Russell Kingb129a8c2005-08-31 10:12:14 +0100948static void sci_stop_tx(struct uart_port *port)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700949{
Linus Torvalds1da177e2005-04-16 15:20:36 -0700950 unsigned short ctrl;
951
952 /* Clear TIE (Transmit Interrupt Enable) bit in SCSCR */
Linus Torvalds1da177e2005-04-16 15:20:36 -0700953 ctrl = sci_in(port, SCSCR);
954 ctrl &= ~SCI_CTRL_FLAGS_TIE;
955 sci_out(port, SCSCR, ctrl);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700956}
957
958static void sci_start_rx(struct uart_port *port, unsigned int tty_start)
959{
Linus Torvalds1da177e2005-04-16 15:20:36 -0700960 unsigned short ctrl;
961
962 /* Set RIE (Receive Interrupt Enable) bit in SCSCR */
Linus Torvalds1da177e2005-04-16 15:20:36 -0700963 ctrl = sci_in(port, SCSCR);
964 ctrl |= SCI_CTRL_FLAGS_RIE | SCI_CTRL_FLAGS_REIE;
965 sci_out(port, SCSCR, ctrl);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700966}
967
968static void sci_stop_rx(struct uart_port *port)
969{
Linus Torvalds1da177e2005-04-16 15:20:36 -0700970 unsigned short ctrl;
971
972 /* Clear RIE (Receive Interrupt Enable) bit in SCSCR */
Linus Torvalds1da177e2005-04-16 15:20:36 -0700973 ctrl = sci_in(port, SCSCR);
974 ctrl &= ~(SCI_CTRL_FLAGS_RIE | SCI_CTRL_FLAGS_REIE);
975 sci_out(port, SCSCR, ctrl);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700976}
977
978static void sci_enable_ms(struct uart_port *port)
979{
980 /* Nothing here yet .. */
981}
982
983static void sci_break_ctl(struct uart_port *port, int break_state)
984{
985 /* Nothing here yet .. */
986}
987
988static int sci_startup(struct uart_port *port)
989{
990 struct sci_port *s = &sci_ports[port->line];
991
Paul Mundte108b2c2006-09-27 16:32:13 +0900992 if (s->enable)
993 s->enable(port);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700994
Paul Mundt005a3362007-04-26 11:45:32 +0900995#if defined(CONFIG_SUPERH) && !defined(CONFIG_SUPERH64)
dmitry pervushin1534a3b2007-04-24 13:41:12 +0900996 s->clk = clk_get(NULL, "module_clk");
Paul Mundt005a3362007-04-26 11:45:32 +0900997#endif
dmitry pervushin1534a3b2007-04-24 13:41:12 +0900998
Linus Torvalds1da177e2005-04-16 15:20:36 -0700999 sci_request_irq(s);
Yoshinori Satod6569012005-10-14 15:59:12 -07001000 sci_start_tx(port);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001001 sci_start_rx(port, 1);
1002
1003 return 0;
1004}
1005
1006static void sci_shutdown(struct uart_port *port)
1007{
1008 struct sci_port *s = &sci_ports[port->line];
1009
1010 sci_stop_rx(port);
Russell Kingb129a8c2005-08-31 10:12:14 +01001011 sci_stop_tx(port);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001012 sci_free_irq(s);
1013
Paul Mundte108b2c2006-09-27 16:32:13 +09001014 if (s->disable)
1015 s->disable(port);
dmitry pervushin1534a3b2007-04-24 13:41:12 +09001016
Paul Mundt005a3362007-04-26 11:45:32 +09001017#if defined(CONFIG_SUPERH) && !defined(CONFIG_SUPERH64)
dmitry pervushin1534a3b2007-04-24 13:41:12 +09001018 clk_put(s->clk);
1019 s->clk = NULL;
Paul Mundt005a3362007-04-26 11:45:32 +09001020#endif
Linus Torvalds1da177e2005-04-16 15:20:36 -07001021}
1022
Alan Cox606d0992006-12-08 02:38:45 -08001023static void sci_set_termios(struct uart_port *port, struct ktermios *termios,
1024 struct ktermios *old)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001025{
1026 struct sci_port *s = &sci_ports[port->line];
1027 unsigned int status, baud, smr_val;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001028 int t;
1029
1030 baud = uart_get_baud_rate(port, termios, old, 0, port->uartclk/16);
1031
Linus Torvalds1da177e2005-04-16 15:20:36 -07001032 switch (baud) {
Paul Mundtb7a76e42006-02-01 03:06:06 -08001033 case 0:
1034 t = -1;
1035 break;
1036 default:
1037 {
1038#if defined(CONFIG_SUPERH) && !defined(CONFIG_SUPERH64)
dmitry pervushin1534a3b2007-04-24 13:41:12 +09001039 t = SCBRR_VALUE(baud, clk_get_rate(s->clk));
Paul Mundtb7a76e42006-02-01 03:06:06 -08001040#else
1041 t = SCBRR_VALUE(baud);
1042#endif
Paul Mundtb7a76e42006-02-01 03:06:06 -08001043 break;
Paul Mundtfa5da2f2007-03-08 17:27:37 +09001044 }
Linus Torvalds1da177e2005-04-16 15:20:36 -07001045 }
1046
Paul Mundte108b2c2006-09-27 16:32:13 +09001047 do {
1048 status = sci_in(port, SCxSR);
1049 } while (!(status & SCxSR_TEND(port)));
1050
1051 sci_out(port, SCSCR, 0x00); /* TE=0, RE=0, CKE1=0 */
1052
1053#if !defined(SCI_ONLY)
1054 if (port->type == PORT_SCIF)
1055 sci_out(port, SCFCR, SCFCR_RFRST | SCFCR_TFRST);
1056#endif
1057
1058 smr_val = sci_in(port, SCSMR) & 3;
1059 if ((termios->c_cflag & CSIZE) == CS7)
1060 smr_val |= 0x40;
1061 if (termios->c_cflag & PARENB)
1062 smr_val |= 0x20;
1063 if (termios->c_cflag & PARODD)
1064 smr_val |= 0x30;
1065 if (termios->c_cflag & CSTOPB)
1066 smr_val |= 0x08;
1067
1068 uart_update_timeout(port, termios->c_cflag, baud);
1069
1070 sci_out(port, SCSMR, smr_val);
1071
Linus Torvalds1da177e2005-04-16 15:20:36 -07001072 if (t > 0) {
1073 if(t >= 256) {
1074 sci_out(port, SCSMR, (sci_in(port, SCSMR) & ~3) | 1);
1075 t >>= 2;
1076 } else {
1077 sci_out(port, SCSMR, sci_in(port, SCSMR) & ~3);
1078 }
1079 sci_out(port, SCBRR, t);
1080 udelay((1000000+(baud-1)) / baud); /* Wait one bit interval */
1081 }
1082
Paul Mundtb7a76e42006-02-01 03:06:06 -08001083 if (likely(s->init_pins))
1084 s->init_pins(port, termios->c_cflag);
1085
Linus Torvalds1da177e2005-04-16 15:20:36 -07001086 sci_out(port, SCSCR, SCSCR_INIT(port));
1087
1088 if ((termios->c_cflag & CREAD) != 0)
1089 sci_start_rx(port,0);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001090}
1091
1092static const char *sci_type(struct uart_port *port)
1093{
1094 switch (port->type) {
1095 case PORT_SCI: return "sci";
1096 case PORT_SCIF: return "scif";
1097 case PORT_IRDA: return "irda";
1098 }
1099
1100 return 0;
1101}
1102
1103static void sci_release_port(struct uart_port *port)
1104{
1105 /* Nothing here yet .. */
1106}
1107
1108static int sci_request_port(struct uart_port *port)
1109{
1110 /* Nothing here yet .. */
1111 return 0;
1112}
1113
1114static void sci_config_port(struct uart_port *port, int flags)
1115{
1116 struct sci_port *s = &sci_ports[port->line];
1117
1118 port->type = s->type;
1119
Paul Mundte108b2c2006-09-27 16:32:13 +09001120 switch (port->type) {
1121 case PORT_SCI:
1122 s->init_pins = sci_init_pins_sci;
1123 break;
1124 case PORT_SCIF:
1125 s->init_pins = sci_init_pins_scif;
1126 break;
1127 case PORT_IRDA:
1128 s->init_pins = sci_init_pins_irda;
1129 break;
1130 }
1131
Linus Torvalds1da177e2005-04-16 15:20:36 -07001132#if defined(CONFIG_CPU_SUBTYPE_SH5_101) || defined(CONFIG_CPU_SUBTYPE_SH5_103)
1133 if (port->mapbase == 0)
1134 port->mapbase = onchip_remap(SCIF_ADDR_SH5, 1024, "SCIF");
1135
Paul Mundte108b2c2006-09-27 16:32:13 +09001136 port->membase = (void __iomem *)port->mapbase;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001137#endif
1138}
1139
1140static int sci_verify_port(struct uart_port *port, struct serial_struct *ser)
1141{
1142 struct sci_port *s = &sci_ports[port->line];
1143
1144 if (ser->irq != s->irqs[SCIx_TXI_IRQ] || ser->irq > NR_IRQS)
1145 return -EINVAL;
1146 if (ser->baud_base < 2400)
1147 /* No paper tape reader for Mitch.. */
1148 return -EINVAL;
1149
1150 return 0;
1151}
1152
1153static struct uart_ops sci_uart_ops = {
1154 .tx_empty = sci_tx_empty,
1155 .set_mctrl = sci_set_mctrl,
1156 .get_mctrl = sci_get_mctrl,
1157 .start_tx = sci_start_tx,
1158 .stop_tx = sci_stop_tx,
1159 .stop_rx = sci_stop_rx,
1160 .enable_ms = sci_enable_ms,
1161 .break_ctl = sci_break_ctl,
1162 .startup = sci_startup,
1163 .shutdown = sci_shutdown,
1164 .set_termios = sci_set_termios,
1165 .type = sci_type,
1166 .release_port = sci_release_port,
1167 .request_port = sci_request_port,
1168 .config_port = sci_config_port,
1169 .verify_port = sci_verify_port,
1170};
1171
Paul Mundte108b2c2006-09-27 16:32:13 +09001172static void __init sci_init_ports(void)
1173{
1174 static int first = 1;
1175 int i;
1176
1177 if (!first)
1178 return;
1179
1180 first = 0;
1181
1182 for (i = 0; i < SCI_NPORTS; i++) {
1183 sci_ports[i].port.ops = &sci_uart_ops;
1184 sci_ports[i].port.iotype = UPIO_MEM;
1185 sci_ports[i].port.line = i;
1186 sci_ports[i].port.fifosize = 1;
1187
1188#if defined(__H8300H__) || defined(__H8300S__)
1189#ifdef __H8300S__
1190 sci_ports[i].enable = h8300_sci_enable;
1191 sci_ports[i].disable = h8300_sci_disable;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001192#endif
Paul Mundte108b2c2006-09-27 16:32:13 +09001193 sci_ports[i].port.uartclk = CONFIG_CPU_CLOCK;
1194#elif defined(CONFIG_SUPERH64)
1195 sci_ports[i].port.uartclk = current_cpu_data.module_clock * 16;
1196#else
1197 /*
1198 * XXX: We should use a proper SCI/SCIF clock
1199 */
1200 {
Paul Mundt1d118562006-12-01 13:15:14 +09001201 struct clk *clk = clk_get(NULL, "module_clk");
Paul Mundte108b2c2006-09-27 16:32:13 +09001202 sci_ports[i].port.uartclk = clk_get_rate(clk) * 16;
1203 clk_put(clk);
1204 }
1205#endif
1206
1207 sci_ports[i].break_timer.data = (unsigned long)&sci_ports[i];
1208 sci_ports[i].break_timer.function = sci_break_timer;
1209
1210 init_timer(&sci_ports[i].break_timer);
1211 }
1212}
1213
1214int __init early_sci_setup(struct uart_port *port)
1215{
1216 if (unlikely(port->line > SCI_NPORTS))
1217 return -ENODEV;
1218
1219 sci_init_ports();
1220
1221 sci_ports[port->line].port.membase = port->membase;
1222 sci_ports[port->line].port.mapbase = port->mapbase;
1223 sci_ports[port->line].port.type = port->type;
1224
1225 return 0;
1226}
Linus Torvalds1da177e2005-04-16 15:20:36 -07001227
1228#ifdef CONFIG_SERIAL_SH_SCI_CONSOLE
1229/*
1230 * Print a string to the serial port trying not to disturb
1231 * any possible real use of the port...
1232 */
1233static void serial_console_write(struct console *co, const char *s,
1234 unsigned count)
1235{
1236 put_string(serial_console_port, s, count);
1237}
1238
1239static int __init serial_console_setup(struct console *co, char *options)
1240{
1241 struct uart_port *port;
1242 int baud = 115200;
1243 int bits = 8;
1244 int parity = 'n';
1245 int flow = 'n';
1246 int ret;
1247
Paul Mundte108b2c2006-09-27 16:32:13 +09001248 /*
1249 * Check whether an invalid uart number has been specified, and
1250 * if so, search for the first available port that does have
1251 * console support.
1252 */
1253 if (co->index >= SCI_NPORTS)
1254 co->index = 0;
1255
Linus Torvalds1da177e2005-04-16 15:20:36 -07001256 serial_console_port = &sci_ports[co->index];
1257 port = &serial_console_port->port;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001258
1259 /*
Paul Mundte108b2c2006-09-27 16:32:13 +09001260 * Also need to check port->type, we don't actually have any
1261 * UPIO_PORT ports, but uart_report_port() handily misreports
1262 * it anyways if we don't have a port available by the time this is
1263 * called.
Linus Torvalds1da177e2005-04-16 15:20:36 -07001264 */
Paul Mundte108b2c2006-09-27 16:32:13 +09001265 if (!port->type)
1266 return -ENODEV;
1267 if (!port->membase || !port->mapbase)
1268 return -ENODEV;
Paul Mundtb7a76e42006-02-01 03:06:06 -08001269
Paul Mundte108b2c2006-09-27 16:32:13 +09001270 port->type = serial_console_port->type;
1271
Paul Mundt005a3362007-04-26 11:45:32 +09001272#if defined(CONFIG_SUPERH) && !defined(CONFIG_SUPERH64)
1273 if (!serial_console_port->clk)
1274 serial_console_port->clk = clk_get(NULL, "module_clk");
1275#endif
1276
Paul Mundte108b2c2006-09-27 16:32:13 +09001277 if (port->flags & UPF_IOREMAP)
1278 sci_config_port(port, 0);
1279
1280 if (serial_console_port->enable)
1281 serial_console_port->enable(port);
1282
Linus Torvalds1da177e2005-04-16 15:20:36 -07001283 if (options)
1284 uart_parse_options(options, &baud, &parity, &bits, &flow);
1285
1286 ret = uart_set_options(port, co, baud, parity, bits, flow);
1287#if defined(__H8300H__) || defined(__H8300S__)
1288 /* disable rx interrupt */
1289 if (ret == 0)
1290 sci_stop_rx(port);
1291#endif
1292 return ret;
1293}
1294
1295static struct console serial_console = {
1296 .name = "ttySC",
1297 .device = uart_console_device,
1298 .write = serial_console_write,
1299 .setup = serial_console_setup,
Paul Mundtfa5da2f2007-03-08 17:27:37 +09001300 .flags = CON_PRINTBUFFER,
Linus Torvalds1da177e2005-04-16 15:20:36 -07001301 .index = -1,
1302 .data = &sci_uart_driver,
1303};
1304
1305static int __init sci_console_init(void)
1306{
Paul Mundte108b2c2006-09-27 16:32:13 +09001307 sci_init_ports();
Linus Torvalds1da177e2005-04-16 15:20:36 -07001308 register_console(&serial_console);
1309 return 0;
1310}
Linus Torvalds1da177e2005-04-16 15:20:36 -07001311console_initcall(sci_console_init);
1312#endif /* CONFIG_SERIAL_SH_SCI_CONSOLE */
1313
Paul Mundt68362e02007-09-11 15:27:29 +09001314#ifdef CONFIG_SH_KGDB_CONSOLE
Linus Torvalds1da177e2005-04-16 15:20:36 -07001315/*
1316 * FIXME: Most of this can go away.. at the moment, we rely on
1317 * arch/sh/kernel/setup.c to do the command line parsing for kgdb, though
1318 * most of that can easily be done here instead.
1319 *
1320 * For the time being, just accept the values that were parsed earlier..
1321 */
1322static void __init kgdb_console_get_options(struct uart_port *port, int *baud,
1323 int *parity, int *bits)
1324{
1325 *baud = kgdb_baud;
1326 *parity = tolower(kgdb_parity);
1327 *bits = kgdb_bits - '0';
1328}
1329
1330/*
1331 * The naming here is somewhat misleading, since kgdb_console_setup() takes
1332 * care of the early-on initialization for kgdb, regardless of whether we
1333 * actually use kgdb as a console or not.
1334 *
1335 * On the plus side, this lets us kill off the old kgdb_sci_setup() nonsense.
1336 */
1337int __init kgdb_console_setup(struct console *co, char *options)
1338{
1339 struct uart_port *port = &sci_ports[kgdb_portnum].port;
1340 int baud = 38400;
1341 int bits = 8;
1342 int parity = 'n';
1343 int flow = 'n';
1344
Paul Mundtb7a76e42006-02-01 03:06:06 -08001345 if (co->index != kgdb_portnum)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001346 co->index = kgdb_portnum;
1347
Paul Mundtfa5da2f2007-03-08 17:27:37 +09001348 kgdb_sci_port = &sci_ports[co->index];
1349 port = &kgdb_sci_port->port;
1350
1351 /*
1352 * Also need to check port->type, we don't actually have any
1353 * UPIO_PORT ports, but uart_report_port() handily misreports
1354 * it anyways if we don't have a port available by the time this is
1355 * called.
1356 */
1357 if (!port->type)
1358 return -ENODEV;
1359 if (!port->membase || !port->mapbase)
1360 return -ENODEV;
1361
Linus Torvalds1da177e2005-04-16 15:20:36 -07001362 if (options)
1363 uart_parse_options(options, &baud, &parity, &bits, &flow);
1364 else
1365 kgdb_console_get_options(port, &baud, &parity, &bits);
1366
1367 kgdb_getchar = kgdb_sci_getchar;
1368 kgdb_putchar = kgdb_sci_putchar;
1369
1370 return uart_set_options(port, co, baud, parity, bits, flow);
1371}
Linus Torvalds1da177e2005-04-16 15:20:36 -07001372
Linus Torvalds1da177e2005-04-16 15:20:36 -07001373static struct console kgdb_console = {
Paul Mundtfa5da2f2007-03-08 17:27:37 +09001374 .name = "ttySC",
1375 .device = uart_console_device,
1376 .write = kgdb_console_write,
1377 .setup = kgdb_console_setup,
1378 .flags = CON_PRINTBUFFER,
1379 .index = -1,
Linus Torvalds1da177e2005-04-16 15:20:36 -07001380 .data = &sci_uart_driver,
1381};
1382
1383/* Register the KGDB console so we get messages (d'oh!) */
1384static int __init kgdb_console_init(void)
1385{
Paul Mundte108b2c2006-09-27 16:32:13 +09001386 sci_init_ports();
Linus Torvalds1da177e2005-04-16 15:20:36 -07001387 register_console(&kgdb_console);
1388 return 0;
1389}
Linus Torvalds1da177e2005-04-16 15:20:36 -07001390console_initcall(kgdb_console_init);
1391#endif /* CONFIG_SH_KGDB_CONSOLE */
1392
1393#if defined(CONFIG_SH_KGDB_CONSOLE)
1394#define SCI_CONSOLE &kgdb_console
1395#elif defined(CONFIG_SERIAL_SH_SCI_CONSOLE)
1396#define SCI_CONSOLE &serial_console
1397#else
Paul Mundtb7a76e42006-02-01 03:06:06 -08001398#define SCI_CONSOLE 0
Linus Torvalds1da177e2005-04-16 15:20:36 -07001399#endif
1400
1401static char banner[] __initdata =
1402 KERN_INFO "SuperH SCI(F) driver initialized\n";
1403
1404static struct uart_driver sci_uart_driver = {
1405 .owner = THIS_MODULE,
1406 .driver_name = "sci",
Linus Torvalds1da177e2005-04-16 15:20:36 -07001407 .dev_name = "ttySC",
1408 .major = SCI_MAJOR,
1409 .minor = SCI_MINOR_START,
Paul Mundte108b2c2006-09-27 16:32:13 +09001410 .nr = SCI_NPORTS,
Linus Torvalds1da177e2005-04-16 15:20:36 -07001411 .cons = SCI_CONSOLE,
1412};
1413
Paul Mundte108b2c2006-09-27 16:32:13 +09001414/*
1415 * Register a set of serial devices attached to a platform device. The
1416 * list is terminated with a zero flags entry, which means we expect
1417 * all entries to have at least UPF_BOOT_AUTOCONF set. Platforms that need
1418 * remapping (such as sh64) should also set UPF_IOREMAP.
1419 */
1420static int __devinit sci_probe(struct platform_device *dev)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001421{
Paul Mundte108b2c2006-09-27 16:32:13 +09001422 struct plat_sci_port *p = dev->dev.platform_data;
1423 int i;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001424
Paul Mundt32351a22007-03-12 14:38:59 +09001425 for (i = 0; p && p->flags != 0; p++, i++) {
Paul Mundte108b2c2006-09-27 16:32:13 +09001426 struct sci_port *sciport = &sci_ports[i];
Linus Torvalds1da177e2005-04-16 15:20:36 -07001427
Paul Mundt32351a22007-03-12 14:38:59 +09001428 /* Sanity check */
1429 if (unlikely(i == SCI_NPORTS)) {
1430 dev_notice(&dev->dev, "Attempting to register port "
1431 "%d when only %d are available.\n",
1432 i+1, SCI_NPORTS);
1433 dev_notice(&dev->dev, "Consider bumping "
1434 "CONFIG_SERIAL_SH_SCI_NR_UARTS!\n");
1435 break;
1436 }
1437
Paul Mundte108b2c2006-09-27 16:32:13 +09001438 sciport->port.mapbase = p->mapbase;
Paul Mundtb7a76e42006-02-01 03:06:06 -08001439
Paul Mundte108b2c2006-09-27 16:32:13 +09001440 /*
1441 * For the simple (and majority of) cases where we don't need
1442 * to do any remapping, just cast the cookie directly.
1443 */
1444 if (p->mapbase && !p->membase && !(p->flags & UPF_IOREMAP))
1445 p->membase = (void __iomem *)p->mapbase;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001446
Paul Mundte108b2c2006-09-27 16:32:13 +09001447 sciport->port.membase = p->membase;
1448
1449 sciport->port.irq = p->irqs[SCIx_TXI_IRQ];
1450 sciport->port.flags = p->flags;
1451 sciport->port.dev = &dev->dev;
1452
1453 sciport->type = sciport->port.type = p->type;
1454
1455 memcpy(&sciport->irqs, &p->irqs, sizeof(p->irqs));
1456
1457 uart_add_one_port(&sci_uart_driver, &sciport->port);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001458 }
1459
Paul Mundtfa5da2f2007-03-08 17:27:37 +09001460#if defined(CONFIG_SH_KGDB) && !defined(CONFIG_SH_KGDB_CONSOLE)
1461 kgdb_sci_port = &sci_ports[kgdb_portnum];
1462 kgdb_getchar = kgdb_sci_getchar;
1463 kgdb_putchar = kgdb_sci_putchar;
1464#endif
1465
Linus Torvalds1da177e2005-04-16 15:20:36 -07001466#ifdef CONFIG_CPU_FREQ
1467 cpufreq_register_notifier(&sci_nb, CPUFREQ_TRANSITION_NOTIFIER);
Paul Mundte289fd92007-08-08 18:09:13 +09001468 dev_info(&dev->dev, "CPU frequency notifier registered\n");
Linus Torvalds1da177e2005-04-16 15:20:36 -07001469#endif
1470
1471#ifdef CONFIG_SH_STANDARD_BIOS
1472 sh_bios_gdb_detach();
1473#endif
1474
Paul Mundte108b2c2006-09-27 16:32:13 +09001475 return 0;
1476}
1477
1478static int __devexit sci_remove(struct platform_device *dev)
1479{
1480 int i;
1481
1482 for (i = 0; i < SCI_NPORTS; i++)
1483 uart_remove_one_port(&sci_uart_driver, &sci_ports[i].port);
1484
1485 return 0;
1486}
1487
1488static int sci_suspend(struct platform_device *dev, pm_message_t state)
1489{
1490 int i;
1491
1492 for (i = 0; i < SCI_NPORTS; i++) {
1493 struct sci_port *p = &sci_ports[i];
1494
1495 if (p->type != PORT_UNKNOWN && p->port.dev == &dev->dev)
1496 uart_suspend_port(&sci_uart_driver, &p->port);
1497 }
1498
1499 return 0;
1500}
1501
1502static int sci_resume(struct platform_device *dev)
1503{
1504 int i;
1505
1506 for (i = 0; i < SCI_NPORTS; i++) {
1507 struct sci_port *p = &sci_ports[i];
1508
1509 if (p->type != PORT_UNKNOWN && p->port.dev == &dev->dev)
1510 uart_resume_port(&sci_uart_driver, &p->port);
1511 }
1512
1513 return 0;
1514}
1515
1516static struct platform_driver sci_driver = {
1517 .probe = sci_probe,
1518 .remove = __devexit_p(sci_remove),
1519 .suspend = sci_suspend,
1520 .resume = sci_resume,
1521 .driver = {
1522 .name = "sh-sci",
1523 .owner = THIS_MODULE,
1524 },
1525};
1526
1527static int __init sci_init(void)
1528{
1529 int ret;
1530
1531 printk(banner);
1532
1533 sci_init_ports();
1534
1535 ret = uart_register_driver(&sci_uart_driver);
1536 if (likely(ret == 0)) {
1537 ret = platform_driver_register(&sci_driver);
1538 if (unlikely(ret))
1539 uart_unregister_driver(&sci_uart_driver);
1540 }
1541
Linus Torvalds1da177e2005-04-16 15:20:36 -07001542 return ret;
1543}
1544
1545static void __exit sci_exit(void)
1546{
Paul Mundte108b2c2006-09-27 16:32:13 +09001547 platform_driver_unregister(&sci_driver);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001548 uart_unregister_driver(&sci_uart_driver);
1549}
1550
1551module_init(sci_init);
1552module_exit(sci_exit);
1553
Paul Mundte108b2c2006-09-27 16:32:13 +09001554MODULE_LICENSE("GPL");