Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1 | /* |
| 2 | * drivers/serial/sh-sci.c |
| 3 | * |
| 4 | * SuperH on-chip serial module support. (SCI with no FIFO / with FIFO) |
| 5 | * |
Paul Mundt | e108b2c | 2006-09-27 16:32:13 +0900 | [diff] [blame] | 6 | * Copyright (C) 2002 - 2006 Paul Mundt |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 7 | * |
| 8 | * based off of the old drivers/char/sh-sci.c by: |
| 9 | * |
| 10 | * Copyright (C) 1999, 2000 Niibe Yutaka |
| 11 | * Copyright (C) 2000 Sugioka Toshinobu |
| 12 | * Modified to support multiple serial ports. Stuart Menefy (May 2000). |
| 13 | * Modified to support SecureEdge. David McCullough (2002) |
| 14 | * Modified to support SH7300 SCIF. Takashi Kusuda (Jun 2003). |
| 15 | * |
| 16 | * This file is subject to the terms and conditions of the GNU General Public |
| 17 | * License. See the file "COPYING" in the main directory of this archive |
| 18 | * for more details. |
| 19 | */ |
Paul Mundt | 0b3d4ef | 2007-03-14 13:22:37 +0900 | [diff] [blame] | 20 | #if defined(CONFIG_SERIAL_SH_SCI_CONSOLE) && defined(CONFIG_MAGIC_SYSRQ) |
| 21 | #define SUPPORT_SYSRQ |
| 22 | #endif |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 23 | |
| 24 | #undef DEBUG |
| 25 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 26 | #include <linux/module.h> |
| 27 | #include <linux/errno.h> |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 28 | #include <linux/timer.h> |
| 29 | #include <linux/interrupt.h> |
| 30 | #include <linux/tty.h> |
| 31 | #include <linux/tty_flip.h> |
| 32 | #include <linux/serial.h> |
| 33 | #include <linux/major.h> |
| 34 | #include <linux/string.h> |
| 35 | #include <linux/sysrq.h> |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 36 | #include <linux/ioport.h> |
| 37 | #include <linux/mm.h> |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 38 | #include <linux/init.h> |
| 39 | #include <linux/delay.h> |
| 40 | #include <linux/console.h> |
Paul Mundt | e108b2c | 2006-09-27 16:32:13 +0900 | [diff] [blame] | 41 | #include <linux/platform_device.h> |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 42 | |
| 43 | #ifdef CONFIG_CPU_FREQ |
| 44 | #include <linux/notifier.h> |
| 45 | #include <linux/cpufreq.h> |
| 46 | #endif |
| 47 | |
Paul Mundt | b7a76e4 | 2006-02-01 03:06:06 -0800 | [diff] [blame] | 48 | #if defined(CONFIG_SUPERH) && !defined(CONFIG_SUPERH64) |
Paul Mundt | fa5da2f | 2007-03-08 17:27:37 +0900 | [diff] [blame] | 49 | #include <linux/ctype.h> |
Paul Mundt | b7a76e4 | 2006-02-01 03:06:06 -0800 | [diff] [blame] | 50 | #include <asm/clock.h> |
Paul Mundt | e108b2c | 2006-09-27 16:32:13 +0900 | [diff] [blame] | 51 | #include <asm/sh_bios.h> |
| 52 | #include <asm/kgdb.h> |
Paul Mundt | b7a76e4 | 2006-02-01 03:06:06 -0800 | [diff] [blame] | 53 | #endif |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 54 | |
Paul Mundt | e108b2c | 2006-09-27 16:32:13 +0900 | [diff] [blame] | 55 | #include <asm/sci.h> |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 56 | #include "sh-sci.h" |
| 57 | |
Paul Mundt | e108b2c | 2006-09-27 16:32:13 +0900 | [diff] [blame] | 58 | struct sci_port { |
| 59 | struct uart_port port; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 60 | |
Paul Mundt | e108b2c | 2006-09-27 16:32:13 +0900 | [diff] [blame] | 61 | /* Port type */ |
| 62 | unsigned int type; |
| 63 | |
| 64 | /* Port IRQs: ERI, RXI, TXI, BRI (optional) */ |
Paul Mundt | 32351a2 | 2007-03-12 14:38:59 +0900 | [diff] [blame^] | 65 | unsigned int irqs[SCIx_NR_IRQS]; |
Paul Mundt | e108b2c | 2006-09-27 16:32:13 +0900 | [diff] [blame] | 66 | |
| 67 | /* Port pin configuration */ |
| 68 | void (*init_pins)(struct uart_port *port, |
| 69 | unsigned int cflag); |
| 70 | |
| 71 | /* Port enable callback */ |
| 72 | void (*enable)(struct uart_port *port); |
| 73 | |
| 74 | /* Port disable callback */ |
| 75 | void (*disable)(struct uart_port *port); |
| 76 | |
| 77 | /* Break timer */ |
| 78 | struct timer_list break_timer; |
| 79 | int break_flag; |
| 80 | }; |
| 81 | |
| 82 | #ifdef CONFIG_SH_KGDB |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 83 | static struct sci_port *kgdb_sci_port; |
Paul Mundt | e108b2c | 2006-09-27 16:32:13 +0900 | [diff] [blame] | 84 | #endif |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 85 | |
| 86 | #ifdef CONFIG_SERIAL_SH_SCI_CONSOLE |
Paul Mundt | e108b2c | 2006-09-27 16:32:13 +0900 | [diff] [blame] | 87 | static struct sci_port *serial_console_port; |
| 88 | #endif |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 89 | |
| 90 | /* Function prototypes */ |
Russell King | b129a8c | 2005-08-31 10:12:14 +0100 | [diff] [blame] | 91 | static void sci_stop_tx(struct uart_port *port); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 92 | |
Paul Mundt | e108b2c | 2006-09-27 16:32:13 +0900 | [diff] [blame] | 93 | #define SCI_NPORTS CONFIG_SERIAL_SH_SCI_NR_UARTS |
| 94 | |
| 95 | static struct sci_port sci_ports[SCI_NPORTS]; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 96 | static struct uart_driver sci_uart_driver; |
| 97 | |
Paul Mundt | e108b2c | 2006-09-27 16:32:13 +0900 | [diff] [blame] | 98 | #if defined(CONFIG_SERIAL_SH_SCI_CONSOLE) && \ |
| 99 | defined(CONFIG_SH_STANDARD_BIOS) || defined(CONFIG_SH_KGDB) |
| 100 | static inline void handle_error(struct uart_port *port) |
| 101 | { |
| 102 | /* Clear error flags */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 103 | sci_out(port, SCxSR, SCxSR_ERROR_CLEAR(port)); |
| 104 | } |
| 105 | |
| 106 | static int get_char(struct uart_port *port) |
| 107 | { |
| 108 | unsigned long flags; |
| 109 | unsigned short status; |
| 110 | int c; |
| 111 | |
Paul Mundt | e108b2c | 2006-09-27 16:32:13 +0900 | [diff] [blame] | 112 | spin_lock_irqsave(&port->lock, flags); |
| 113 | do { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 114 | status = sci_in(port, SCxSR); |
| 115 | if (status & SCxSR_ERRORS(port)) { |
| 116 | handle_error(port); |
| 117 | continue; |
| 118 | } |
| 119 | } while (!(status & SCxSR_RDxF(port))); |
| 120 | c = sci_in(port, SCxRDR); |
| 121 | sci_in(port, SCxSR); /* Dummy read */ |
| 122 | sci_out(port, SCxSR, SCxSR_RDxF_CLEAR(port)); |
Paul Mundt | e108b2c | 2006-09-27 16:32:13 +0900 | [diff] [blame] | 123 | spin_unlock_irqrestore(&port->lock, flags); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 124 | |
| 125 | return c; |
| 126 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 127 | #endif /* CONFIG_SH_STANDARD_BIOS || CONFIG_SH_KGDB */ |
| 128 | |
Paul Mundt | e108b2c | 2006-09-27 16:32:13 +0900 | [diff] [blame] | 129 | #if defined(CONFIG_SERIAL_SH_SCI_CONSOLE) || defined(CONFIG_SH_KGDB) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 130 | static void put_char(struct uart_port *port, char c) |
| 131 | { |
| 132 | unsigned long flags; |
| 133 | unsigned short status; |
| 134 | |
Paul Mundt | e108b2c | 2006-09-27 16:32:13 +0900 | [diff] [blame] | 135 | spin_lock_irqsave(&port->lock, flags); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 136 | |
| 137 | do { |
| 138 | status = sci_in(port, SCxSR); |
| 139 | } while (!(status & SCxSR_TDxE(port))); |
| 140 | |
| 141 | sci_out(port, SCxTDR, c); |
| 142 | sci_in(port, SCxSR); /* Dummy read */ |
| 143 | sci_out(port, SCxSR, SCxSR_TDxE_CLEAR(port)); |
| 144 | |
Paul Mundt | e108b2c | 2006-09-27 16:32:13 +0900 | [diff] [blame] | 145 | spin_unlock_irqrestore(&port->lock, flags); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 146 | } |
Paul Mundt | e108b2c | 2006-09-27 16:32:13 +0900 | [diff] [blame] | 147 | #endif |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 148 | |
Paul Mundt | e108b2c | 2006-09-27 16:32:13 +0900 | [diff] [blame] | 149 | #ifdef CONFIG_SERIAL_SH_SCI_CONSOLE |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 150 | static void put_string(struct sci_port *sci_port, const char *buffer, int count) |
| 151 | { |
| 152 | struct uart_port *port = &sci_port->port; |
| 153 | const unsigned char *p = buffer; |
| 154 | int i; |
| 155 | |
| 156 | #if defined(CONFIG_SH_STANDARD_BIOS) || defined(CONFIG_SH_KGDB) |
| 157 | int checksum; |
| 158 | int usegdb=0; |
| 159 | |
| 160 | #ifdef CONFIG_SH_STANDARD_BIOS |
Paul Mundt | b7a76e4 | 2006-02-01 03:06:06 -0800 | [diff] [blame] | 161 | /* This call only does a trap the first time it is |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 162 | * called, and so is safe to do here unconditionally |
| 163 | */ |
| 164 | usegdb |= sh_bios_in_gdb_mode(); |
| 165 | #endif |
| 166 | #ifdef CONFIG_SH_KGDB |
Paul Mundt | fa5da2f | 2007-03-08 17:27:37 +0900 | [diff] [blame] | 167 | usegdb |= (kgdb_in_gdb_mode && (sci_port == kgdb_sci_port)); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 168 | #endif |
| 169 | |
| 170 | if (usegdb) { |
| 171 | /* $<packet info>#<checksum>. */ |
| 172 | do { |
| 173 | unsigned char c; |
| 174 | put_char(port, '$'); |
| 175 | put_char(port, 'O'); /* 'O'utput to console */ |
| 176 | checksum = 'O'; |
| 177 | |
| 178 | for (i=0; i<count; i++) { /* Don't use run length encoding */ |
| 179 | int h, l; |
| 180 | |
| 181 | c = *p++; |
| 182 | h = highhex(c); |
| 183 | l = lowhex(c); |
| 184 | put_char(port, h); |
| 185 | put_char(port, l); |
| 186 | checksum += h + l; |
| 187 | } |
| 188 | put_char(port, '#'); |
| 189 | put_char(port, highhex(checksum)); |
| 190 | put_char(port, lowhex(checksum)); |
| 191 | } while (get_char(port) != '+'); |
| 192 | } else |
| 193 | #endif /* CONFIG_SH_STANDARD_BIOS || CONFIG_SH_KGDB */ |
| 194 | for (i=0; i<count; i++) { |
| 195 | if (*p == 10) |
| 196 | put_char(port, '\r'); |
| 197 | put_char(port, *p++); |
| 198 | } |
| 199 | } |
| 200 | #endif /* CONFIG_SERIAL_SH_SCI_CONSOLE */ |
| 201 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 202 | #ifdef CONFIG_SH_KGDB |
Paul Mundt | e108b2c | 2006-09-27 16:32:13 +0900 | [diff] [blame] | 203 | static int kgdb_sci_getchar(void) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 204 | { |
| 205 | int c; |
| 206 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 207 | /* Keep trying to read a character, this could be neater */ |
Paul Mundt | fa5da2f | 2007-03-08 17:27:37 +0900 | [diff] [blame] | 208 | while ((c = get_char(&kgdb_sci_port->port)) < 0) |
Paul Mundt | e108b2c | 2006-09-27 16:32:13 +0900 | [diff] [blame] | 209 | cpu_relax(); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 210 | |
| 211 | return c; |
| 212 | } |
| 213 | |
Paul Mundt | e108b2c | 2006-09-27 16:32:13 +0900 | [diff] [blame] | 214 | static inline void kgdb_sci_putchar(int c) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 215 | { |
Paul Mundt | fa5da2f | 2007-03-08 17:27:37 +0900 | [diff] [blame] | 216 | put_char(&kgdb_sci_port->port, c); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 217 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 218 | #endif /* CONFIG_SH_KGDB */ |
| 219 | |
| 220 | #if defined(__H8300S__) |
| 221 | enum { sci_disable, sci_enable }; |
| 222 | |
Paul Mundt | e108b2c | 2006-09-27 16:32:13 +0900 | [diff] [blame] | 223 | static void h8300_sci_config(struct uart_port* port, unsigned int ctrl) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 224 | { |
| 225 | volatile unsigned char *mstpcrl=(volatile unsigned char *)MSTPCRL; |
| 226 | int ch = (port->mapbase - SMR0) >> 3; |
| 227 | unsigned char mask = 1 << (ch+1); |
| 228 | |
| 229 | if (ctrl == sci_disable) { |
| 230 | *mstpcrl |= mask; |
| 231 | } else { |
| 232 | *mstpcrl &= ~mask; |
| 233 | } |
| 234 | } |
Paul Mundt | e108b2c | 2006-09-27 16:32:13 +0900 | [diff] [blame] | 235 | |
| 236 | static inline void h8300_sci_enable(struct uart_port *port) |
| 237 | { |
| 238 | h8300_sci_config(port, sci_enable); |
| 239 | } |
| 240 | |
| 241 | static inline void h8300_sci_disable(struct uart_port *port) |
| 242 | { |
| 243 | h8300_sci_config(port, sci_disable); |
| 244 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 245 | #endif |
| 246 | |
Paul Mundt | e108b2c | 2006-09-27 16:32:13 +0900 | [diff] [blame] | 247 | #if defined(SCI_ONLY) || defined(SCI_AND_SCIF) && \ |
| 248 | defined(__H8300H__) || defined(__H8300S__) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 249 | static void sci_init_pins_sci(struct uart_port* port, unsigned int cflag) |
| 250 | { |
| 251 | int ch = (port->mapbase - SMR0) >> 3; |
| 252 | |
| 253 | /* set DDR regs */ |
Paul Mundt | e108b2c | 2006-09-27 16:32:13 +0900 | [diff] [blame] | 254 | H8300_GPIO_DDR(h8300_sci_pins[ch].port, |
| 255 | h8300_sci_pins[ch].rx, |
| 256 | H8300_GPIO_INPUT); |
| 257 | H8300_GPIO_DDR(h8300_sci_pins[ch].port, |
| 258 | h8300_sci_pins[ch].tx, |
| 259 | H8300_GPIO_OUTPUT); |
| 260 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 261 | /* tx mark output*/ |
| 262 | H8300_SCI_DR(ch) |= h8300_sci_pins[ch].tx; |
| 263 | } |
Paul Mundt | e108b2c | 2006-09-27 16:32:13 +0900 | [diff] [blame] | 264 | #else |
| 265 | #define sci_init_pins_sci NULL |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 266 | #endif |
Paul Mundt | e108b2c | 2006-09-27 16:32:13 +0900 | [diff] [blame] | 267 | |
| 268 | #if defined(CONFIG_CPU_SUBTYPE_SH7707) || defined(CONFIG_CPU_SUBTYPE_SH7709) |
| 269 | static void sci_init_pins_irda(struct uart_port *port, unsigned int cflag) |
| 270 | { |
| 271 | unsigned int fcr_val = 0; |
| 272 | |
| 273 | if (cflag & CRTSCTS) |
| 274 | fcr_val |= SCFCR_MCE; |
| 275 | |
| 276 | sci_out(port, SCFCR, fcr_val); |
| 277 | } |
| 278 | #else |
| 279 | #define sci_init_pins_irda NULL |
| 280 | #endif |
| 281 | |
| 282 | #ifdef SCI_ONLY |
| 283 | #define sci_init_pins_scif NULL |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 284 | #endif |
| 285 | |
| 286 | #if defined(SCIF_ONLY) || defined(SCI_AND_SCIF) |
Paul Mundt | e108b2c | 2006-09-27 16:32:13 +0900 | [diff] [blame] | 287 | #if defined(CONFIG_CPU_SUBTYPE_SH7300) || defined(CONFIG_CPU_SUBTYPE_SH7710) |
Paul Mundt | b7a76e4 | 2006-02-01 03:06:06 -0800 | [diff] [blame] | 288 | /* SH7300 doesn't use RTS/CTS */ |
| 289 | static void sci_init_pins_scif(struct uart_port *port, unsigned int cflag) |
| 290 | { |
| 291 | sci_out(port, SCFCR, 0); |
| 292 | } |
| 293 | #elif defined(CONFIG_CPU_SH3) |
Paul Mundt | e108b2c | 2006-09-27 16:32:13 +0900 | [diff] [blame] | 294 | /* For SH7705, SH7706, SH7707, SH7709, SH7709A, SH7729 */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 295 | static void sci_init_pins_scif(struct uart_port *port, unsigned int cflag) |
| 296 | { |
| 297 | unsigned int fcr_val = 0; |
Paul Mundt | b7a76e4 | 2006-02-01 03:06:06 -0800 | [diff] [blame] | 298 | unsigned short data; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 299 | |
Paul Mundt | b7a76e4 | 2006-02-01 03:06:06 -0800 | [diff] [blame] | 300 | /* We need to set SCPCR to enable RTS/CTS */ |
| 301 | data = ctrl_inw(SCPCR); |
| 302 | /* Clear out SCP7MD1,0, SCP6MD1,0, SCP4MD1,0*/ |
| 303 | ctrl_outw(data & 0x0fcf, SCPCR); |
| 304 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 305 | if (cflag & CRTSCTS) |
| 306 | fcr_val |= SCFCR_MCE; |
| 307 | else { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 308 | /* We need to set SCPCR to enable RTS/CTS */ |
| 309 | data = ctrl_inw(SCPCR); |
| 310 | /* Clear out SCP7MD1,0, SCP4MD1,0, |
| 311 | Set SCP6MD1,0 = {01} (output) */ |
Paul Mundt | b7a76e4 | 2006-02-01 03:06:06 -0800 | [diff] [blame] | 312 | ctrl_outw((data & 0x0fcf) | 0x1000, SCPCR); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 313 | |
| 314 | data = ctrl_inb(SCPDR); |
| 315 | /* Set /RTS2 (bit6) = 0 */ |
Paul Mundt | b7a76e4 | 2006-02-01 03:06:06 -0800 | [diff] [blame] | 316 | ctrl_outb(data & 0xbf, SCPDR); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 317 | } |
Paul Mundt | b7a76e4 | 2006-02-01 03:06:06 -0800 | [diff] [blame] | 318 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 319 | sci_out(port, SCFCR, fcr_val); |
| 320 | } |
Paul Mundt | 41504c3 | 2006-12-11 20:28:03 +0900 | [diff] [blame] | 321 | #elif defined(CONFIG_CPU_SUBTYPE_SH7722) |
| 322 | static void sci_init_pins_scif(struct uart_port *port, unsigned int cflag) |
| 323 | { |
| 324 | unsigned int fcr_val = 0; |
| 325 | |
| 326 | if (cflag & CRTSCTS) { |
| 327 | fcr_val |= SCFCR_MCE; |
| 328 | |
| 329 | ctrl_outw(0x0000, PORT_PSCR); |
| 330 | } else { |
| 331 | unsigned short data; |
| 332 | |
| 333 | data = ctrl_inw(PORT_PSCR); |
| 334 | data &= 0x033f; |
| 335 | data |= 0x0400; |
| 336 | ctrl_outw(data, PORT_PSCR); |
| 337 | |
| 338 | ctrl_outw(ctrl_inw(SCSPTR0) & 0x17, SCSPTR0); |
| 339 | } |
| 340 | |
| 341 | sci_out(port, SCFCR, fcr_val); |
| 342 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 343 | #else |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 344 | /* For SH7750 */ |
| 345 | static void sci_init_pins_scif(struct uart_port *port, unsigned int cflag) |
| 346 | { |
| 347 | unsigned int fcr_val = 0; |
| 348 | |
| 349 | if (cflag & CRTSCTS) { |
| 350 | fcr_val |= SCFCR_MCE; |
| 351 | } else { |
Paul Mundt | e108b2c | 2006-09-27 16:32:13 +0900 | [diff] [blame] | 352 | #ifdef CONFIG_CPU_SUBTYPE_SH7343 |
| 353 | /* Nothing */ |
Paul Mundt | 32351a2 | 2007-03-12 14:38:59 +0900 | [diff] [blame^] | 354 | #elif defined(CONFIG_CPU_SUBTYPE_SH7780) || defined(CONFIG_CPU_SUBTYPE_SH7785) |
Paul Mundt | b7a76e4 | 2006-02-01 03:06:06 -0800 | [diff] [blame] | 355 | ctrl_outw(0x0080, SCSPTR0); /* Set RTS = 1 */ |
| 356 | #else |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 357 | ctrl_outw(0x0080, SCSPTR2); /* Set RTS = 1 */ |
Paul Mundt | b7a76e4 | 2006-02-01 03:06:06 -0800 | [diff] [blame] | 358 | #endif |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 359 | } |
| 360 | sci_out(port, SCFCR, fcr_val); |
| 361 | } |
Paul Mundt | e108b2c | 2006-09-27 16:32:13 +0900 | [diff] [blame] | 362 | #endif |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 363 | |
Paul Mundt | 32351a2 | 2007-03-12 14:38:59 +0900 | [diff] [blame^] | 364 | #if defined(CONFIG_CPU_SUBTYPE_SH7760) || \ |
| 365 | defined(CONFIG_CPU_SUBTYPE_SH7780) || \ |
| 366 | defined(CONFIG_CPU_SUBTYPE_SH7785) |
Paul Mundt | e108b2c | 2006-09-27 16:32:13 +0900 | [diff] [blame] | 367 | static inline int scif_txroom(struct uart_port *port) |
| 368 | { |
| 369 | return SCIF_TXROOM_MAX - (sci_in(port, SCTFDR) & 0x7f); |
| 370 | } |
| 371 | |
| 372 | static inline int scif_rxroom(struct uart_port *port) |
| 373 | { |
| 374 | return sci_in(port, SCRFDR) & 0x7f; |
| 375 | } |
| 376 | #else |
| 377 | static inline int scif_txroom(struct uart_port *port) |
| 378 | { |
| 379 | return SCIF_TXROOM_MAX - (sci_in(port, SCFDR) >> 8); |
| 380 | } |
| 381 | |
| 382 | static inline int scif_rxroom(struct uart_port *port) |
| 383 | { |
| 384 | return sci_in(port, SCFDR) & SCIF_RFDC_MASK; |
| 385 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 386 | #endif |
| 387 | #endif /* SCIF_ONLY || SCI_AND_SCIF */ |
| 388 | |
Paul Mundt | e108b2c | 2006-09-27 16:32:13 +0900 | [diff] [blame] | 389 | static inline int sci_txroom(struct uart_port *port) |
| 390 | { |
| 391 | return ((sci_in(port, SCxSR) & SCI_TDRE) != 0); |
| 392 | } |
| 393 | |
| 394 | static inline int sci_rxroom(struct uart_port *port) |
| 395 | { |
| 396 | return ((sci_in(port, SCxSR) & SCxSR_RDxF(port)) != 0); |
| 397 | } |
| 398 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 399 | /* ********************************************************************** * |
| 400 | * the interrupt related routines * |
| 401 | * ********************************************************************** */ |
| 402 | |
| 403 | static void sci_transmit_chars(struct uart_port *port) |
| 404 | { |
| 405 | struct circ_buf *xmit = &port->info->xmit; |
| 406 | unsigned int stopped = uart_tx_stopped(port); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 407 | unsigned short status; |
| 408 | unsigned short ctrl; |
Paul Mundt | e108b2c | 2006-09-27 16:32:13 +0900 | [diff] [blame] | 409 | int count; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 410 | |
| 411 | status = sci_in(port, SCxSR); |
| 412 | if (!(status & SCxSR_TDxE(port))) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 413 | ctrl = sci_in(port, SCSCR); |
| 414 | if (uart_circ_empty(xmit)) { |
| 415 | ctrl &= ~SCI_CTRL_FLAGS_TIE; |
| 416 | } else { |
| 417 | ctrl |= SCI_CTRL_FLAGS_TIE; |
| 418 | } |
| 419 | sci_out(port, SCSCR, ctrl); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 420 | return; |
| 421 | } |
| 422 | |
Paul Mundt | e108b2c | 2006-09-27 16:32:13 +0900 | [diff] [blame] | 423 | #ifndef SCI_ONLY |
| 424 | if (port->type == PORT_SCIF) |
| 425 | count = scif_txroom(port); |
| 426 | else |
Paul Mundt | b7a76e4 | 2006-02-01 03:06:06 -0800 | [diff] [blame] | 427 | #endif |
Paul Mundt | e108b2c | 2006-09-27 16:32:13 +0900 | [diff] [blame] | 428 | count = sci_txroom(port); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 429 | |
| 430 | do { |
| 431 | unsigned char c; |
| 432 | |
| 433 | if (port->x_char) { |
| 434 | c = port->x_char; |
| 435 | port->x_char = 0; |
| 436 | } else if (!uart_circ_empty(xmit) && !stopped) { |
| 437 | c = xmit->buf[xmit->tail]; |
| 438 | xmit->tail = (xmit->tail + 1) & (UART_XMIT_SIZE - 1); |
| 439 | } else { |
| 440 | break; |
| 441 | } |
| 442 | |
| 443 | sci_out(port, SCxTDR, c); |
| 444 | |
| 445 | port->icount.tx++; |
| 446 | } while (--count > 0); |
| 447 | |
| 448 | sci_out(port, SCxSR, SCxSR_TDxE_CLEAR(port)); |
| 449 | |
| 450 | if (uart_circ_chars_pending(xmit) < WAKEUP_CHARS) |
| 451 | uart_write_wakeup(port); |
| 452 | if (uart_circ_empty(xmit)) { |
Russell King | b129a8c | 2005-08-31 10:12:14 +0100 | [diff] [blame] | 453 | sci_stop_tx(port); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 454 | } else { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 455 | ctrl = sci_in(port, SCSCR); |
| 456 | |
| 457 | #if !defined(SCI_ONLY) |
| 458 | if (port->type == PORT_SCIF) { |
| 459 | sci_in(port, SCxSR); /* Dummy read */ |
| 460 | sci_out(port, SCxSR, SCxSR_TDxE_CLEAR(port)); |
| 461 | } |
| 462 | #endif |
| 463 | |
| 464 | ctrl |= SCI_CTRL_FLAGS_TIE; |
| 465 | sci_out(port, SCSCR, ctrl); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 466 | } |
| 467 | } |
| 468 | |
| 469 | /* On SH3, SCIF may read end-of-break as a space->mark char */ |
| 470 | #define STEPFN(c) ({int __c=(c); (((__c-1)|(__c)) == -1); }) |
| 471 | |
David Howells | 7d12e78 | 2006-10-05 14:55:46 +0100 | [diff] [blame] | 472 | static inline void sci_receive_chars(struct uart_port *port) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 473 | { |
Paul Mundt | e108b2c | 2006-09-27 16:32:13 +0900 | [diff] [blame] | 474 | struct sci_port *sci_port = (struct sci_port *)port; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 475 | struct tty_struct *tty = port->info->tty; |
| 476 | int i, count, copied = 0; |
| 477 | unsigned short status; |
Alan Cox | 33f0f88 | 2006-01-09 20:54:13 -0800 | [diff] [blame] | 478 | unsigned char flag; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 479 | |
| 480 | status = sci_in(port, SCxSR); |
| 481 | if (!(status & SCxSR_RDxF(port))) |
| 482 | return; |
| 483 | |
| 484 | while (1) { |
| 485 | #if !defined(SCI_ONLY) |
Paul Mundt | e108b2c | 2006-09-27 16:32:13 +0900 | [diff] [blame] | 486 | if (port->type == PORT_SCIF) |
| 487 | count = scif_rxroom(port); |
| 488 | else |
Paul Mundt | b7a76e4 | 2006-02-01 03:06:06 -0800 | [diff] [blame] | 489 | #endif |
Paul Mundt | e108b2c | 2006-09-27 16:32:13 +0900 | [diff] [blame] | 490 | count = sci_rxroom(port); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 491 | |
| 492 | /* Don't copy more bytes than there is room for in the buffer */ |
Alan Cox | 33f0f88 | 2006-01-09 20:54:13 -0800 | [diff] [blame] | 493 | count = tty_buffer_request_room(tty, count); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 494 | |
| 495 | /* If for any reason we can't copy more data, we're done! */ |
| 496 | if (count == 0) |
| 497 | break; |
| 498 | |
| 499 | if (port->type == PORT_SCI) { |
| 500 | char c = sci_in(port, SCxRDR); |
David Howells | 7d12e78 | 2006-10-05 14:55:46 +0100 | [diff] [blame] | 501 | if (uart_handle_sysrq_char(port, c) || sci_port->break_flag) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 502 | count = 0; |
Paul Mundt | e108b2c | 2006-09-27 16:32:13 +0900 | [diff] [blame] | 503 | else { |
| 504 | tty_insert_flip_char(tty, c, TTY_NORMAL); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 505 | } |
| 506 | } else { |
| 507 | for (i=0; i<count; i++) { |
| 508 | char c = sci_in(port, SCxRDR); |
| 509 | status = sci_in(port, SCxSR); |
| 510 | #if defined(CONFIG_CPU_SH3) |
| 511 | /* Skip "chars" during break */ |
Paul Mundt | e108b2c | 2006-09-27 16:32:13 +0900 | [diff] [blame] | 512 | if (sci_port->break_flag) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 513 | if ((c == 0) && |
| 514 | (status & SCxSR_FER(port))) { |
| 515 | count--; i--; |
| 516 | continue; |
| 517 | } |
Paul Mundt | e108b2c | 2006-09-27 16:32:13 +0900 | [diff] [blame] | 518 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 519 | /* Nonzero => end-of-break */ |
| 520 | pr_debug("scif: debounce<%02x>\n", c); |
Paul Mundt | e108b2c | 2006-09-27 16:32:13 +0900 | [diff] [blame] | 521 | sci_port->break_flag = 0; |
| 522 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 523 | if (STEPFN(c)) { |
| 524 | count--; i--; |
| 525 | continue; |
| 526 | } |
| 527 | } |
| 528 | #endif /* CONFIG_CPU_SH3 */ |
David Howells | 7d12e78 | 2006-10-05 14:55:46 +0100 | [diff] [blame] | 529 | if (uart_handle_sysrq_char(port, c)) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 530 | count--; i--; |
| 531 | continue; |
| 532 | } |
| 533 | |
| 534 | /* Store data and status */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 535 | if (status&SCxSR_FER(port)) { |
Alan Cox | 33f0f88 | 2006-01-09 20:54:13 -0800 | [diff] [blame] | 536 | flag = TTY_FRAME; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 537 | pr_debug("sci: frame error\n"); |
| 538 | } else if (status&SCxSR_PER(port)) { |
Alan Cox | 33f0f88 | 2006-01-09 20:54:13 -0800 | [diff] [blame] | 539 | flag = TTY_PARITY; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 540 | pr_debug("sci: parity error\n"); |
Alan Cox | 33f0f88 | 2006-01-09 20:54:13 -0800 | [diff] [blame] | 541 | } else |
| 542 | flag = TTY_NORMAL; |
| 543 | tty_insert_flip_char(tty, c, flag); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 544 | } |
| 545 | } |
| 546 | |
| 547 | sci_in(port, SCxSR); /* dummy read */ |
| 548 | sci_out(port, SCxSR, SCxSR_RDxF_CLEAR(port)); |
| 549 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 550 | copied += count; |
| 551 | port->icount.rx += count; |
| 552 | } |
| 553 | |
| 554 | if (copied) { |
| 555 | /* Tell the rest of the system the news. New characters! */ |
| 556 | tty_flip_buffer_push(tty); |
| 557 | } else { |
| 558 | sci_in(port, SCxSR); /* dummy read */ |
| 559 | sci_out(port, SCxSR, SCxSR_RDxF_CLEAR(port)); |
| 560 | } |
| 561 | } |
| 562 | |
| 563 | #define SCI_BREAK_JIFFIES (HZ/20) |
| 564 | /* The sci generates interrupts during the break, |
| 565 | * 1 per millisecond or so during the break period, for 9600 baud. |
| 566 | * So dont bother disabling interrupts. |
| 567 | * But dont want more than 1 break event. |
| 568 | * Use a kernel timer to periodically poll the rx line until |
| 569 | * the break is finished. |
| 570 | */ |
| 571 | static void sci_schedule_break_timer(struct sci_port *port) |
| 572 | { |
| 573 | port->break_timer.expires = jiffies + SCI_BREAK_JIFFIES; |
| 574 | add_timer(&port->break_timer); |
| 575 | } |
| 576 | /* Ensure that two consecutive samples find the break over. */ |
| 577 | static void sci_break_timer(unsigned long data) |
| 578 | { |
Paul Mundt | e108b2c | 2006-09-27 16:32:13 +0900 | [diff] [blame] | 579 | struct sci_port *port = (struct sci_port *)data; |
| 580 | |
| 581 | if (sci_rxd_in(&port->port) == 0) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 582 | port->break_flag = 1; |
Paul Mundt | e108b2c | 2006-09-27 16:32:13 +0900 | [diff] [blame] | 583 | sci_schedule_break_timer(port); |
| 584 | } else if (port->break_flag == 1) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 585 | /* break is over. */ |
| 586 | port->break_flag = 2; |
Paul Mundt | e108b2c | 2006-09-27 16:32:13 +0900 | [diff] [blame] | 587 | sci_schedule_break_timer(port); |
| 588 | } else |
| 589 | port->break_flag = 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 590 | } |
| 591 | |
| 592 | static inline int sci_handle_errors(struct uart_port *port) |
| 593 | { |
| 594 | int copied = 0; |
| 595 | unsigned short status = sci_in(port, SCxSR); |
| 596 | struct tty_struct *tty = port->info->tty; |
| 597 | |
Paul Mundt | e108b2c | 2006-09-27 16:32:13 +0900 | [diff] [blame] | 598 | if (status & SCxSR_ORER(port)) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 599 | /* overrun error */ |
Paul Mundt | e108b2c | 2006-09-27 16:32:13 +0900 | [diff] [blame] | 600 | if (tty_insert_flip_char(tty, 0, TTY_OVERRUN)) |
Alan Cox | 33f0f88 | 2006-01-09 20:54:13 -0800 | [diff] [blame] | 601 | copied++; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 602 | pr_debug("sci: overrun error\n"); |
| 603 | } |
| 604 | |
Paul Mundt | e108b2c | 2006-09-27 16:32:13 +0900 | [diff] [blame] | 605 | if (status & SCxSR_FER(port)) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 606 | if (sci_rxd_in(port) == 0) { |
| 607 | /* Notify of BREAK */ |
Paul Mundt | e108b2c | 2006-09-27 16:32:13 +0900 | [diff] [blame] | 608 | struct sci_port *sci_port = (struct sci_port *)port; |
| 609 | |
| 610 | if (!sci_port->break_flag) { |
| 611 | sci_port->break_flag = 1; |
| 612 | sci_schedule_break_timer(sci_port); |
| 613 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 614 | /* Do sysrq handling. */ |
Paul Mundt | e108b2c | 2006-09-27 16:32:13 +0900 | [diff] [blame] | 615 | if (uart_handle_break(port)) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 616 | return 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 617 | pr_debug("sci: BREAK detected\n"); |
Paul Mundt | e108b2c | 2006-09-27 16:32:13 +0900 | [diff] [blame] | 618 | if (tty_insert_flip_char(tty, 0, TTY_BREAK)) |
Alan Cox | 33f0f88 | 2006-01-09 20:54:13 -0800 | [diff] [blame] | 619 | copied++; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 620 | } |
Paul Mundt | e108b2c | 2006-09-27 16:32:13 +0900 | [diff] [blame] | 621 | } else { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 622 | /* frame error */ |
Paul Mundt | e108b2c | 2006-09-27 16:32:13 +0900 | [diff] [blame] | 623 | if (tty_insert_flip_char(tty, 0, TTY_FRAME)) |
Alan Cox | 33f0f88 | 2006-01-09 20:54:13 -0800 | [diff] [blame] | 624 | copied++; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 625 | pr_debug("sci: frame error\n"); |
| 626 | } |
| 627 | } |
| 628 | |
Paul Mundt | e108b2c | 2006-09-27 16:32:13 +0900 | [diff] [blame] | 629 | if (status & SCxSR_PER(port)) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 630 | /* parity error */ |
Paul Mundt | e108b2c | 2006-09-27 16:32:13 +0900 | [diff] [blame] | 631 | if (tty_insert_flip_char(tty, 0, TTY_PARITY)) |
| 632 | copied++; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 633 | pr_debug("sci: parity error\n"); |
| 634 | } |
| 635 | |
Alan Cox | 33f0f88 | 2006-01-09 20:54:13 -0800 | [diff] [blame] | 636 | if (copied) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 637 | tty_flip_buffer_push(tty); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 638 | |
| 639 | return copied; |
| 640 | } |
| 641 | |
| 642 | static inline int sci_handle_breaks(struct uart_port *port) |
| 643 | { |
| 644 | int copied = 0; |
| 645 | unsigned short status = sci_in(port, SCxSR); |
| 646 | struct tty_struct *tty = port->info->tty; |
| 647 | struct sci_port *s = &sci_ports[port->line]; |
| 648 | |
Paul Mundt | 0b3d4ef | 2007-03-14 13:22:37 +0900 | [diff] [blame] | 649 | if (uart_handle_break(port)) |
| 650 | return 0; |
| 651 | |
Paul Mundt | b7a76e4 | 2006-02-01 03:06:06 -0800 | [diff] [blame] | 652 | if (!s->break_flag && status & SCxSR_BRK(port)) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 653 | #if defined(CONFIG_CPU_SH3) |
| 654 | /* Debounce break */ |
| 655 | s->break_flag = 1; |
| 656 | #endif |
| 657 | /* Notify of BREAK */ |
Paul Mundt | e108b2c | 2006-09-27 16:32:13 +0900 | [diff] [blame] | 658 | if (tty_insert_flip_char(tty, 0, TTY_BREAK)) |
Alan Cox | 33f0f88 | 2006-01-09 20:54:13 -0800 | [diff] [blame] | 659 | copied++; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 660 | pr_debug("sci: BREAK detected\n"); |
| 661 | } |
| 662 | |
| 663 | #if defined(SCIF_ORER) |
| 664 | /* XXX: Handle SCIF overrun error */ |
| 665 | if (port->type == PORT_SCIF && (sci_in(port, SCLSR) & SCIF_ORER) != 0) { |
| 666 | sci_out(port, SCLSR, 0); |
Paul Mundt | e108b2c | 2006-09-27 16:32:13 +0900 | [diff] [blame] | 667 | if (tty_insert_flip_char(tty, 0, TTY_OVERRUN)) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 668 | copied++; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 669 | pr_debug("sci: overrun error\n"); |
| 670 | } |
| 671 | } |
| 672 | #endif |
| 673 | |
Alan Cox | 33f0f88 | 2006-01-09 20:54:13 -0800 | [diff] [blame] | 674 | if (copied) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 675 | tty_flip_buffer_push(tty); |
Paul Mundt | e108b2c | 2006-09-27 16:32:13 +0900 | [diff] [blame] | 676 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 677 | return copied; |
| 678 | } |
| 679 | |
David Howells | 7d12e78 | 2006-10-05 14:55:46 +0100 | [diff] [blame] | 680 | static irqreturn_t sci_rx_interrupt(int irq, void *port) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 681 | { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 682 | /* I think sci_receive_chars has to be called irrespective |
| 683 | * of whether the I_IXOFF is set, otherwise, how is the interrupt |
| 684 | * to be disabled? |
| 685 | */ |
David Howells | 7d12e78 | 2006-10-05 14:55:46 +0100 | [diff] [blame] | 686 | sci_receive_chars(port); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 687 | |
| 688 | return IRQ_HANDLED; |
| 689 | } |
| 690 | |
David Howells | 7d12e78 | 2006-10-05 14:55:46 +0100 | [diff] [blame] | 691 | static irqreturn_t sci_tx_interrupt(int irq, void *ptr) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 692 | { |
| 693 | struct uart_port *port = ptr; |
| 694 | |
Paul Mundt | e108b2c | 2006-09-27 16:32:13 +0900 | [diff] [blame] | 695 | spin_lock_irq(&port->lock); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 696 | sci_transmit_chars(port); |
Paul Mundt | e108b2c | 2006-09-27 16:32:13 +0900 | [diff] [blame] | 697 | spin_unlock_irq(&port->lock); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 698 | |
| 699 | return IRQ_HANDLED; |
| 700 | } |
| 701 | |
David Howells | 7d12e78 | 2006-10-05 14:55:46 +0100 | [diff] [blame] | 702 | static irqreturn_t sci_er_interrupt(int irq, void *ptr) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 703 | { |
| 704 | struct uart_port *port = ptr; |
| 705 | |
| 706 | /* Handle errors */ |
| 707 | if (port->type == PORT_SCI) { |
| 708 | if (sci_handle_errors(port)) { |
| 709 | /* discard character in rx buffer */ |
| 710 | sci_in(port, SCxSR); |
| 711 | sci_out(port, SCxSR, SCxSR_RDxF_CLEAR(port)); |
| 712 | } |
| 713 | } else { |
| 714 | #if defined(SCIF_ORER) |
| 715 | if((sci_in(port, SCLSR) & SCIF_ORER) != 0) { |
| 716 | struct tty_struct *tty = port->info->tty; |
| 717 | |
| 718 | sci_out(port, SCLSR, 0); |
Alan Cox | 33f0f88 | 2006-01-09 20:54:13 -0800 | [diff] [blame] | 719 | tty_insert_flip_char(tty, 0, TTY_OVERRUN); |
| 720 | tty_flip_buffer_push(tty); |
| 721 | pr_debug("scif: overrun error\n"); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 722 | } |
| 723 | #endif |
David Howells | 7d12e78 | 2006-10-05 14:55:46 +0100 | [diff] [blame] | 724 | sci_rx_interrupt(irq, ptr); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 725 | } |
| 726 | |
| 727 | sci_out(port, SCxSR, SCxSR_ERROR_CLEAR(port)); |
| 728 | |
| 729 | /* Kick the transmission */ |
David Howells | 7d12e78 | 2006-10-05 14:55:46 +0100 | [diff] [blame] | 730 | sci_tx_interrupt(irq, ptr); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 731 | |
| 732 | return IRQ_HANDLED; |
| 733 | } |
| 734 | |
David Howells | 7d12e78 | 2006-10-05 14:55:46 +0100 | [diff] [blame] | 735 | static irqreturn_t sci_br_interrupt(int irq, void *ptr) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 736 | { |
| 737 | struct uart_port *port = ptr; |
| 738 | |
| 739 | /* Handle BREAKs */ |
| 740 | sci_handle_breaks(port); |
Paul Mundt | e108b2c | 2006-09-27 16:32:13 +0900 | [diff] [blame] | 741 | |
| 742 | #ifdef CONFIG_SH_KGDB |
| 743 | /* Break into the debugger if a break is detected */ |
Paul Mundt | fa5da2f | 2007-03-08 17:27:37 +0900 | [diff] [blame] | 744 | breakpoint(); |
Paul Mundt | e108b2c | 2006-09-27 16:32:13 +0900 | [diff] [blame] | 745 | #endif |
| 746 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 747 | sci_out(port, SCxSR, SCxSR_BREAK_CLEAR(port)); |
| 748 | |
| 749 | return IRQ_HANDLED; |
| 750 | } |
| 751 | |
David Howells | 7d12e78 | 2006-10-05 14:55:46 +0100 | [diff] [blame] | 752 | static irqreturn_t sci_mpxed_interrupt(int irq, void *ptr) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 753 | { |
| 754 | unsigned short ssr_status, scr_status; |
| 755 | struct uart_port *port = ptr; |
| 756 | |
| 757 | ssr_status = sci_in(port,SCxSR); |
| 758 | scr_status = sci_in(port,SCSCR); |
| 759 | |
| 760 | /* Tx Interrupt */ |
Paul Mundt | e108b2c | 2006-09-27 16:32:13 +0900 | [diff] [blame] | 761 | if ((ssr_status & 0x0020) && (scr_status & 0x0080)) |
David Howells | 7d12e78 | 2006-10-05 14:55:46 +0100 | [diff] [blame] | 762 | sci_tx_interrupt(irq, ptr); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 763 | /* Rx Interrupt */ |
Paul Mundt | e108b2c | 2006-09-27 16:32:13 +0900 | [diff] [blame] | 764 | if ((ssr_status & 0x0002) && (scr_status & 0x0040)) |
David Howells | 7d12e78 | 2006-10-05 14:55:46 +0100 | [diff] [blame] | 765 | sci_rx_interrupt(irq, ptr); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 766 | /* Error Interrupt */ |
Paul Mundt | e108b2c | 2006-09-27 16:32:13 +0900 | [diff] [blame] | 767 | if ((ssr_status & 0x0080) && (scr_status & 0x0400)) |
David Howells | 7d12e78 | 2006-10-05 14:55:46 +0100 | [diff] [blame] | 768 | sci_er_interrupt(irq, ptr); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 769 | /* Break Interrupt */ |
Paul Mundt | e108b2c | 2006-09-27 16:32:13 +0900 | [diff] [blame] | 770 | if ((ssr_status & 0x0010) && (scr_status & 0x0200)) |
David Howells | 7d12e78 | 2006-10-05 14:55:46 +0100 | [diff] [blame] | 771 | sci_br_interrupt(irq, ptr); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 772 | |
| 773 | return IRQ_HANDLED; |
| 774 | } |
| 775 | |
| 776 | #ifdef CONFIG_CPU_FREQ |
| 777 | /* |
| 778 | * Here we define a transistion notifier so that we can update all of our |
| 779 | * ports' baud rate when the peripheral clock changes. |
| 780 | */ |
Paul Mundt | e108b2c | 2006-09-27 16:32:13 +0900 | [diff] [blame] | 781 | static int sci_notifier(struct notifier_block *self, |
| 782 | unsigned long phase, void *p) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 783 | { |
| 784 | struct cpufreq_freqs *freqs = p; |
| 785 | int i; |
| 786 | |
| 787 | if ((phase == CPUFREQ_POSTCHANGE) || |
| 788 | (phase == CPUFREQ_RESUMECHANGE)){ |
| 789 | for (i = 0; i < SCI_NPORTS; i++) { |
| 790 | struct uart_port *port = &sci_ports[i].port; |
Paul Mundt | b7a76e4 | 2006-02-01 03:06:06 -0800 | [diff] [blame] | 791 | struct clk *clk; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 792 | |
| 793 | /* |
| 794 | * Update the uartclk per-port if frequency has |
| 795 | * changed, since it will no longer necessarily be |
| 796 | * consistent with the old frequency. |
| 797 | * |
| 798 | * Really we want to be able to do something like |
| 799 | * uart_change_speed() or something along those lines |
| 800 | * here to implicitly reset the per-port baud rate.. |
| 801 | * |
| 802 | * Clean this up later.. |
| 803 | */ |
Paul Mundt | 1d11856 | 2006-12-01 13:15:14 +0900 | [diff] [blame] | 804 | clk = clk_get(NULL, "module_clk"); |
Paul Mundt | b7a76e4 | 2006-02-01 03:06:06 -0800 | [diff] [blame] | 805 | port->uartclk = clk_get_rate(clk) * 16; |
| 806 | clk_put(clk); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 807 | } |
| 808 | |
Paul Mundt | e108b2c | 2006-09-27 16:32:13 +0900 | [diff] [blame] | 809 | printk(KERN_INFO "%s: got a postchange notification " |
| 810 | "for cpu %d (old %d, new %d)\n", |
| 811 | __FUNCTION__, freqs->cpu, freqs->old, freqs->new); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 812 | } |
| 813 | |
| 814 | return NOTIFY_OK; |
| 815 | } |
| 816 | |
| 817 | static struct notifier_block sci_nb = { &sci_notifier, NULL, 0 }; |
| 818 | #endif /* CONFIG_CPU_FREQ */ |
| 819 | |
| 820 | static int sci_request_irq(struct sci_port *port) |
| 821 | { |
| 822 | int i; |
David Howells | 7d12e78 | 2006-10-05 14:55:46 +0100 | [diff] [blame] | 823 | irqreturn_t (*handlers[4])(int irq, void *ptr) = { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 824 | sci_er_interrupt, sci_rx_interrupt, sci_tx_interrupt, |
| 825 | sci_br_interrupt, |
| 826 | }; |
| 827 | const char *desc[] = { "SCI Receive Error", "SCI Receive Data Full", |
| 828 | "SCI Transmit Data Empty", "SCI Break" }; |
| 829 | |
| 830 | if (port->irqs[0] == port->irqs[1]) { |
| 831 | if (!port->irqs[0]) { |
| 832 | printk(KERN_ERR "sci: Cannot allocate irq.(IRQ=0)\n"); |
| 833 | return -ENODEV; |
| 834 | } |
Paul Mundt | e108b2c | 2006-09-27 16:32:13 +0900 | [diff] [blame] | 835 | |
| 836 | if (request_irq(port->irqs[0], sci_mpxed_interrupt, |
Paul Mundt | 35f3c51 | 2006-10-06 15:31:16 +0900 | [diff] [blame] | 837 | IRQF_DISABLED, "sci", port)) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 838 | printk(KERN_ERR "sci: Cannot allocate irq.\n"); |
| 839 | return -ENODEV; |
| 840 | } |
| 841 | } else { |
| 842 | for (i = 0; i < ARRAY_SIZE(handlers); i++) { |
| 843 | if (!port->irqs[i]) |
| 844 | continue; |
Paul Mundt | e108b2c | 2006-09-27 16:32:13 +0900 | [diff] [blame] | 845 | if (request_irq(port->irqs[i], handlers[i], |
Paul Mundt | 35f3c51 | 2006-10-06 15:31:16 +0900 | [diff] [blame] | 846 | IRQF_DISABLED, desc[i], port)) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 847 | printk(KERN_ERR "sci: Cannot allocate irq.\n"); |
| 848 | return -ENODEV; |
| 849 | } |
| 850 | } |
| 851 | } |
| 852 | |
| 853 | return 0; |
| 854 | } |
| 855 | |
| 856 | static void sci_free_irq(struct sci_port *port) |
| 857 | { |
| 858 | int i; |
| 859 | |
| 860 | if (port->irqs[0] == port->irqs[1]) { |
| 861 | if (!port->irqs[0]) |
| 862 | printk("sci: sci_free_irq error\n"); |
| 863 | else |
| 864 | free_irq(port->irqs[0], port); |
| 865 | } else { |
| 866 | for (i = 0; i < ARRAY_SIZE(port->irqs); i++) { |
| 867 | if (!port->irqs[i]) |
| 868 | continue; |
| 869 | |
| 870 | free_irq(port->irqs[i], port); |
| 871 | } |
| 872 | } |
| 873 | } |
| 874 | |
| 875 | static unsigned int sci_tx_empty(struct uart_port *port) |
| 876 | { |
| 877 | /* Can't detect */ |
| 878 | return TIOCSER_TEMT; |
| 879 | } |
| 880 | |
| 881 | static void sci_set_mctrl(struct uart_port *port, unsigned int mctrl) |
| 882 | { |
| 883 | /* This routine is used for seting signals of: DTR, DCD, CTS/RTS */ |
| 884 | /* We use SCIF's hardware for CTS/RTS, so don't need any for that. */ |
| 885 | /* If you have signals for DTR and DCD, please implement here. */ |
| 886 | } |
| 887 | |
| 888 | static unsigned int sci_get_mctrl(struct uart_port *port) |
| 889 | { |
| 890 | /* This routine is used for geting signals of: DTR, DCD, DSR, RI, |
| 891 | and CTS/RTS */ |
| 892 | |
| 893 | return TIOCM_DTR | TIOCM_RTS | TIOCM_DSR; |
| 894 | } |
| 895 | |
Russell King | b129a8c | 2005-08-31 10:12:14 +0100 | [diff] [blame] | 896 | static void sci_start_tx(struct uart_port *port) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 897 | { |
Paul Mundt | e108b2c | 2006-09-27 16:32:13 +0900 | [diff] [blame] | 898 | unsigned short ctrl; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 899 | |
Paul Mundt | e108b2c | 2006-09-27 16:32:13 +0900 | [diff] [blame] | 900 | /* Set TIE (Transmit Interrupt Enable) bit in SCSCR */ |
| 901 | ctrl = sci_in(port, SCSCR); |
| 902 | ctrl |= SCI_CTRL_FLAGS_TIE; |
| 903 | sci_out(port, SCSCR, ctrl); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 904 | } |
| 905 | |
Russell King | b129a8c | 2005-08-31 10:12:14 +0100 | [diff] [blame] | 906 | static void sci_stop_tx(struct uart_port *port) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 907 | { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 908 | unsigned short ctrl; |
| 909 | |
| 910 | /* Clear TIE (Transmit Interrupt Enable) bit in SCSCR */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 911 | ctrl = sci_in(port, SCSCR); |
| 912 | ctrl &= ~SCI_CTRL_FLAGS_TIE; |
| 913 | sci_out(port, SCSCR, ctrl); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 914 | } |
| 915 | |
| 916 | static void sci_start_rx(struct uart_port *port, unsigned int tty_start) |
| 917 | { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 918 | unsigned short ctrl; |
| 919 | |
| 920 | /* Set RIE (Receive Interrupt Enable) bit in SCSCR */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 921 | ctrl = sci_in(port, SCSCR); |
| 922 | ctrl |= SCI_CTRL_FLAGS_RIE | SCI_CTRL_FLAGS_REIE; |
| 923 | sci_out(port, SCSCR, ctrl); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 924 | } |
| 925 | |
| 926 | static void sci_stop_rx(struct uart_port *port) |
| 927 | { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 928 | unsigned short ctrl; |
| 929 | |
| 930 | /* Clear RIE (Receive Interrupt Enable) bit in SCSCR */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 931 | ctrl = sci_in(port, SCSCR); |
| 932 | ctrl &= ~(SCI_CTRL_FLAGS_RIE | SCI_CTRL_FLAGS_REIE); |
| 933 | sci_out(port, SCSCR, ctrl); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 934 | } |
| 935 | |
| 936 | static void sci_enable_ms(struct uart_port *port) |
| 937 | { |
| 938 | /* Nothing here yet .. */ |
| 939 | } |
| 940 | |
| 941 | static void sci_break_ctl(struct uart_port *port, int break_state) |
| 942 | { |
| 943 | /* Nothing here yet .. */ |
| 944 | } |
| 945 | |
| 946 | static int sci_startup(struct uart_port *port) |
| 947 | { |
| 948 | struct sci_port *s = &sci_ports[port->line]; |
| 949 | |
Paul Mundt | e108b2c | 2006-09-27 16:32:13 +0900 | [diff] [blame] | 950 | if (s->enable) |
| 951 | s->enable(port); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 952 | |
| 953 | sci_request_irq(s); |
Yoshinori Sato | d656901 | 2005-10-14 15:59:12 -0700 | [diff] [blame] | 954 | sci_start_tx(port); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 955 | sci_start_rx(port, 1); |
| 956 | |
| 957 | return 0; |
| 958 | } |
| 959 | |
| 960 | static void sci_shutdown(struct uart_port *port) |
| 961 | { |
| 962 | struct sci_port *s = &sci_ports[port->line]; |
| 963 | |
| 964 | sci_stop_rx(port); |
Russell King | b129a8c | 2005-08-31 10:12:14 +0100 | [diff] [blame] | 965 | sci_stop_tx(port); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 966 | sci_free_irq(s); |
| 967 | |
Paul Mundt | e108b2c | 2006-09-27 16:32:13 +0900 | [diff] [blame] | 968 | if (s->disable) |
| 969 | s->disable(port); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 970 | } |
| 971 | |
Alan Cox | 606d099 | 2006-12-08 02:38:45 -0800 | [diff] [blame] | 972 | static void sci_set_termios(struct uart_port *port, struct ktermios *termios, |
| 973 | struct ktermios *old) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 974 | { |
| 975 | struct sci_port *s = &sci_ports[port->line]; |
| 976 | unsigned int status, baud, smr_val; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 977 | int t; |
| 978 | |
| 979 | baud = uart_get_baud_rate(port, termios, old, 0, port->uartclk/16); |
| 980 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 981 | switch (baud) { |
Paul Mundt | b7a76e4 | 2006-02-01 03:06:06 -0800 | [diff] [blame] | 982 | case 0: |
| 983 | t = -1; |
| 984 | break; |
| 985 | default: |
| 986 | { |
| 987 | #if defined(CONFIG_SUPERH) && !defined(CONFIG_SUPERH64) |
Paul Mundt | 1d11856 | 2006-12-01 13:15:14 +0900 | [diff] [blame] | 988 | struct clk *clk = clk_get(NULL, "module_clk"); |
Paul Mundt | b7a76e4 | 2006-02-01 03:06:06 -0800 | [diff] [blame] | 989 | t = SCBRR_VALUE(baud, clk_get_rate(clk)); |
| 990 | clk_put(clk); |
| 991 | #else |
| 992 | t = SCBRR_VALUE(baud); |
| 993 | #endif |
Paul Mundt | b7a76e4 | 2006-02-01 03:06:06 -0800 | [diff] [blame] | 994 | break; |
Paul Mundt | fa5da2f | 2007-03-08 17:27:37 +0900 | [diff] [blame] | 995 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 996 | } |
| 997 | |
Paul Mundt | e108b2c | 2006-09-27 16:32:13 +0900 | [diff] [blame] | 998 | do { |
| 999 | status = sci_in(port, SCxSR); |
| 1000 | } while (!(status & SCxSR_TEND(port))); |
| 1001 | |
| 1002 | sci_out(port, SCSCR, 0x00); /* TE=0, RE=0, CKE1=0 */ |
| 1003 | |
| 1004 | #if !defined(SCI_ONLY) |
| 1005 | if (port->type == PORT_SCIF) |
| 1006 | sci_out(port, SCFCR, SCFCR_RFRST | SCFCR_TFRST); |
| 1007 | #endif |
| 1008 | |
| 1009 | smr_val = sci_in(port, SCSMR) & 3; |
| 1010 | if ((termios->c_cflag & CSIZE) == CS7) |
| 1011 | smr_val |= 0x40; |
| 1012 | if (termios->c_cflag & PARENB) |
| 1013 | smr_val |= 0x20; |
| 1014 | if (termios->c_cflag & PARODD) |
| 1015 | smr_val |= 0x30; |
| 1016 | if (termios->c_cflag & CSTOPB) |
| 1017 | smr_val |= 0x08; |
| 1018 | |
| 1019 | uart_update_timeout(port, termios->c_cflag, baud); |
| 1020 | |
| 1021 | sci_out(port, SCSMR, smr_val); |
| 1022 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1023 | if (t > 0) { |
| 1024 | if(t >= 256) { |
| 1025 | sci_out(port, SCSMR, (sci_in(port, SCSMR) & ~3) | 1); |
| 1026 | t >>= 2; |
| 1027 | } else { |
| 1028 | sci_out(port, SCSMR, sci_in(port, SCSMR) & ~3); |
| 1029 | } |
| 1030 | sci_out(port, SCBRR, t); |
| 1031 | udelay((1000000+(baud-1)) / baud); /* Wait one bit interval */ |
| 1032 | } |
| 1033 | |
Paul Mundt | b7a76e4 | 2006-02-01 03:06:06 -0800 | [diff] [blame] | 1034 | if (likely(s->init_pins)) |
| 1035 | s->init_pins(port, termios->c_cflag); |
| 1036 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1037 | sci_out(port, SCSCR, SCSCR_INIT(port)); |
| 1038 | |
| 1039 | if ((termios->c_cflag & CREAD) != 0) |
| 1040 | sci_start_rx(port,0); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1041 | } |
| 1042 | |
| 1043 | static const char *sci_type(struct uart_port *port) |
| 1044 | { |
| 1045 | switch (port->type) { |
| 1046 | case PORT_SCI: return "sci"; |
| 1047 | case PORT_SCIF: return "scif"; |
| 1048 | case PORT_IRDA: return "irda"; |
| 1049 | } |
| 1050 | |
| 1051 | return 0; |
| 1052 | } |
| 1053 | |
| 1054 | static void sci_release_port(struct uart_port *port) |
| 1055 | { |
| 1056 | /* Nothing here yet .. */ |
| 1057 | } |
| 1058 | |
| 1059 | static int sci_request_port(struct uart_port *port) |
| 1060 | { |
| 1061 | /* Nothing here yet .. */ |
| 1062 | return 0; |
| 1063 | } |
| 1064 | |
| 1065 | static void sci_config_port(struct uart_port *port, int flags) |
| 1066 | { |
| 1067 | struct sci_port *s = &sci_ports[port->line]; |
| 1068 | |
| 1069 | port->type = s->type; |
| 1070 | |
Paul Mundt | e108b2c | 2006-09-27 16:32:13 +0900 | [diff] [blame] | 1071 | switch (port->type) { |
| 1072 | case PORT_SCI: |
| 1073 | s->init_pins = sci_init_pins_sci; |
| 1074 | break; |
| 1075 | case PORT_SCIF: |
| 1076 | s->init_pins = sci_init_pins_scif; |
| 1077 | break; |
| 1078 | case PORT_IRDA: |
| 1079 | s->init_pins = sci_init_pins_irda; |
| 1080 | break; |
| 1081 | } |
| 1082 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1083 | #if defined(CONFIG_CPU_SUBTYPE_SH5_101) || defined(CONFIG_CPU_SUBTYPE_SH5_103) |
| 1084 | if (port->mapbase == 0) |
| 1085 | port->mapbase = onchip_remap(SCIF_ADDR_SH5, 1024, "SCIF"); |
| 1086 | |
Paul Mundt | e108b2c | 2006-09-27 16:32:13 +0900 | [diff] [blame] | 1087 | port->membase = (void __iomem *)port->mapbase; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1088 | #endif |
| 1089 | } |
| 1090 | |
| 1091 | static int sci_verify_port(struct uart_port *port, struct serial_struct *ser) |
| 1092 | { |
| 1093 | struct sci_port *s = &sci_ports[port->line]; |
| 1094 | |
| 1095 | if (ser->irq != s->irqs[SCIx_TXI_IRQ] || ser->irq > NR_IRQS) |
| 1096 | return -EINVAL; |
| 1097 | if (ser->baud_base < 2400) |
| 1098 | /* No paper tape reader for Mitch.. */ |
| 1099 | return -EINVAL; |
| 1100 | |
| 1101 | return 0; |
| 1102 | } |
| 1103 | |
| 1104 | static struct uart_ops sci_uart_ops = { |
| 1105 | .tx_empty = sci_tx_empty, |
| 1106 | .set_mctrl = sci_set_mctrl, |
| 1107 | .get_mctrl = sci_get_mctrl, |
| 1108 | .start_tx = sci_start_tx, |
| 1109 | .stop_tx = sci_stop_tx, |
| 1110 | .stop_rx = sci_stop_rx, |
| 1111 | .enable_ms = sci_enable_ms, |
| 1112 | .break_ctl = sci_break_ctl, |
| 1113 | .startup = sci_startup, |
| 1114 | .shutdown = sci_shutdown, |
| 1115 | .set_termios = sci_set_termios, |
| 1116 | .type = sci_type, |
| 1117 | .release_port = sci_release_port, |
| 1118 | .request_port = sci_request_port, |
| 1119 | .config_port = sci_config_port, |
| 1120 | .verify_port = sci_verify_port, |
| 1121 | }; |
| 1122 | |
Paul Mundt | e108b2c | 2006-09-27 16:32:13 +0900 | [diff] [blame] | 1123 | static void __init sci_init_ports(void) |
| 1124 | { |
| 1125 | static int first = 1; |
| 1126 | int i; |
| 1127 | |
| 1128 | if (!first) |
| 1129 | return; |
| 1130 | |
| 1131 | first = 0; |
| 1132 | |
| 1133 | for (i = 0; i < SCI_NPORTS; i++) { |
| 1134 | sci_ports[i].port.ops = &sci_uart_ops; |
| 1135 | sci_ports[i].port.iotype = UPIO_MEM; |
| 1136 | sci_ports[i].port.line = i; |
| 1137 | sci_ports[i].port.fifosize = 1; |
| 1138 | |
| 1139 | #if defined(__H8300H__) || defined(__H8300S__) |
| 1140 | #ifdef __H8300S__ |
| 1141 | sci_ports[i].enable = h8300_sci_enable; |
| 1142 | sci_ports[i].disable = h8300_sci_disable; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1143 | #endif |
Paul Mundt | e108b2c | 2006-09-27 16:32:13 +0900 | [diff] [blame] | 1144 | sci_ports[i].port.uartclk = CONFIG_CPU_CLOCK; |
| 1145 | #elif defined(CONFIG_SUPERH64) |
| 1146 | sci_ports[i].port.uartclk = current_cpu_data.module_clock * 16; |
| 1147 | #else |
| 1148 | /* |
| 1149 | * XXX: We should use a proper SCI/SCIF clock |
| 1150 | */ |
| 1151 | { |
Paul Mundt | 1d11856 | 2006-12-01 13:15:14 +0900 | [diff] [blame] | 1152 | struct clk *clk = clk_get(NULL, "module_clk"); |
Paul Mundt | e108b2c | 2006-09-27 16:32:13 +0900 | [diff] [blame] | 1153 | sci_ports[i].port.uartclk = clk_get_rate(clk) * 16; |
| 1154 | clk_put(clk); |
| 1155 | } |
| 1156 | #endif |
| 1157 | |
| 1158 | sci_ports[i].break_timer.data = (unsigned long)&sci_ports[i]; |
| 1159 | sci_ports[i].break_timer.function = sci_break_timer; |
| 1160 | |
| 1161 | init_timer(&sci_ports[i].break_timer); |
| 1162 | } |
| 1163 | } |
| 1164 | |
| 1165 | int __init early_sci_setup(struct uart_port *port) |
| 1166 | { |
| 1167 | if (unlikely(port->line > SCI_NPORTS)) |
| 1168 | return -ENODEV; |
| 1169 | |
| 1170 | sci_init_ports(); |
| 1171 | |
| 1172 | sci_ports[port->line].port.membase = port->membase; |
| 1173 | sci_ports[port->line].port.mapbase = port->mapbase; |
| 1174 | sci_ports[port->line].port.type = port->type; |
| 1175 | |
| 1176 | return 0; |
| 1177 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1178 | |
| 1179 | #ifdef CONFIG_SERIAL_SH_SCI_CONSOLE |
| 1180 | /* |
| 1181 | * Print a string to the serial port trying not to disturb |
| 1182 | * any possible real use of the port... |
| 1183 | */ |
| 1184 | static void serial_console_write(struct console *co, const char *s, |
| 1185 | unsigned count) |
| 1186 | { |
| 1187 | put_string(serial_console_port, s, count); |
| 1188 | } |
| 1189 | |
| 1190 | static int __init serial_console_setup(struct console *co, char *options) |
| 1191 | { |
| 1192 | struct uart_port *port; |
| 1193 | int baud = 115200; |
| 1194 | int bits = 8; |
| 1195 | int parity = 'n'; |
| 1196 | int flow = 'n'; |
| 1197 | int ret; |
| 1198 | |
Paul Mundt | e108b2c | 2006-09-27 16:32:13 +0900 | [diff] [blame] | 1199 | /* |
| 1200 | * Check whether an invalid uart number has been specified, and |
| 1201 | * if so, search for the first available port that does have |
| 1202 | * console support. |
| 1203 | */ |
| 1204 | if (co->index >= SCI_NPORTS) |
| 1205 | co->index = 0; |
| 1206 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1207 | serial_console_port = &sci_ports[co->index]; |
| 1208 | port = &serial_console_port->port; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1209 | |
| 1210 | /* |
Paul Mundt | e108b2c | 2006-09-27 16:32:13 +0900 | [diff] [blame] | 1211 | * Also need to check port->type, we don't actually have any |
| 1212 | * UPIO_PORT ports, but uart_report_port() handily misreports |
| 1213 | * it anyways if we don't have a port available by the time this is |
| 1214 | * called. |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1215 | */ |
Paul Mundt | e108b2c | 2006-09-27 16:32:13 +0900 | [diff] [blame] | 1216 | if (!port->type) |
| 1217 | return -ENODEV; |
| 1218 | if (!port->membase || !port->mapbase) |
| 1219 | return -ENODEV; |
Paul Mundt | b7a76e4 | 2006-02-01 03:06:06 -0800 | [diff] [blame] | 1220 | |
Paul Mundt | e108b2c | 2006-09-27 16:32:13 +0900 | [diff] [blame] | 1221 | port->type = serial_console_port->type; |
| 1222 | |
| 1223 | if (port->flags & UPF_IOREMAP) |
| 1224 | sci_config_port(port, 0); |
| 1225 | |
| 1226 | if (serial_console_port->enable) |
| 1227 | serial_console_port->enable(port); |
| 1228 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1229 | if (options) |
| 1230 | uart_parse_options(options, &baud, &parity, &bits, &flow); |
| 1231 | |
| 1232 | ret = uart_set_options(port, co, baud, parity, bits, flow); |
| 1233 | #if defined(__H8300H__) || defined(__H8300S__) |
| 1234 | /* disable rx interrupt */ |
| 1235 | if (ret == 0) |
| 1236 | sci_stop_rx(port); |
| 1237 | #endif |
| 1238 | return ret; |
| 1239 | } |
| 1240 | |
| 1241 | static struct console serial_console = { |
| 1242 | .name = "ttySC", |
| 1243 | .device = uart_console_device, |
| 1244 | .write = serial_console_write, |
| 1245 | .setup = serial_console_setup, |
Paul Mundt | fa5da2f | 2007-03-08 17:27:37 +0900 | [diff] [blame] | 1246 | .flags = CON_PRINTBUFFER, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1247 | .index = -1, |
| 1248 | .data = &sci_uart_driver, |
| 1249 | }; |
| 1250 | |
| 1251 | static int __init sci_console_init(void) |
| 1252 | { |
Paul Mundt | e108b2c | 2006-09-27 16:32:13 +0900 | [diff] [blame] | 1253 | sci_init_ports(); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1254 | register_console(&serial_console); |
| 1255 | return 0; |
| 1256 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1257 | console_initcall(sci_console_init); |
| 1258 | #endif /* CONFIG_SERIAL_SH_SCI_CONSOLE */ |
| 1259 | |
| 1260 | #ifdef CONFIG_SH_KGDB |
| 1261 | /* |
| 1262 | * FIXME: Most of this can go away.. at the moment, we rely on |
| 1263 | * arch/sh/kernel/setup.c to do the command line parsing for kgdb, though |
| 1264 | * most of that can easily be done here instead. |
| 1265 | * |
| 1266 | * For the time being, just accept the values that were parsed earlier.. |
| 1267 | */ |
| 1268 | static void __init kgdb_console_get_options(struct uart_port *port, int *baud, |
| 1269 | int *parity, int *bits) |
| 1270 | { |
| 1271 | *baud = kgdb_baud; |
| 1272 | *parity = tolower(kgdb_parity); |
| 1273 | *bits = kgdb_bits - '0'; |
| 1274 | } |
| 1275 | |
| 1276 | /* |
| 1277 | * The naming here is somewhat misleading, since kgdb_console_setup() takes |
| 1278 | * care of the early-on initialization for kgdb, regardless of whether we |
| 1279 | * actually use kgdb as a console or not. |
| 1280 | * |
| 1281 | * On the plus side, this lets us kill off the old kgdb_sci_setup() nonsense. |
| 1282 | */ |
| 1283 | int __init kgdb_console_setup(struct console *co, char *options) |
| 1284 | { |
| 1285 | struct uart_port *port = &sci_ports[kgdb_portnum].port; |
| 1286 | int baud = 38400; |
| 1287 | int bits = 8; |
| 1288 | int parity = 'n'; |
| 1289 | int flow = 'n'; |
| 1290 | |
Paul Mundt | b7a76e4 | 2006-02-01 03:06:06 -0800 | [diff] [blame] | 1291 | if (co->index != kgdb_portnum) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1292 | co->index = kgdb_portnum; |
| 1293 | |
Paul Mundt | fa5da2f | 2007-03-08 17:27:37 +0900 | [diff] [blame] | 1294 | kgdb_sci_port = &sci_ports[co->index]; |
| 1295 | port = &kgdb_sci_port->port; |
| 1296 | |
| 1297 | /* |
| 1298 | * Also need to check port->type, we don't actually have any |
| 1299 | * UPIO_PORT ports, but uart_report_port() handily misreports |
| 1300 | * it anyways if we don't have a port available by the time this is |
| 1301 | * called. |
| 1302 | */ |
| 1303 | if (!port->type) |
| 1304 | return -ENODEV; |
| 1305 | if (!port->membase || !port->mapbase) |
| 1306 | return -ENODEV; |
| 1307 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1308 | if (options) |
| 1309 | uart_parse_options(options, &baud, &parity, &bits, &flow); |
| 1310 | else |
| 1311 | kgdb_console_get_options(port, &baud, &parity, &bits); |
| 1312 | |
| 1313 | kgdb_getchar = kgdb_sci_getchar; |
| 1314 | kgdb_putchar = kgdb_sci_putchar; |
| 1315 | |
| 1316 | return uart_set_options(port, co, baud, parity, bits, flow); |
| 1317 | } |
| 1318 | #endif /* CONFIG_SH_KGDB */ |
| 1319 | |
| 1320 | #ifdef CONFIG_SH_KGDB_CONSOLE |
| 1321 | static struct console kgdb_console = { |
Paul Mundt | fa5da2f | 2007-03-08 17:27:37 +0900 | [diff] [blame] | 1322 | .name = "ttySC", |
| 1323 | .device = uart_console_device, |
| 1324 | .write = kgdb_console_write, |
| 1325 | .setup = kgdb_console_setup, |
| 1326 | .flags = CON_PRINTBUFFER, |
| 1327 | .index = -1, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1328 | .data = &sci_uart_driver, |
| 1329 | }; |
| 1330 | |
| 1331 | /* Register the KGDB console so we get messages (d'oh!) */ |
| 1332 | static int __init kgdb_console_init(void) |
| 1333 | { |
Paul Mundt | e108b2c | 2006-09-27 16:32:13 +0900 | [diff] [blame] | 1334 | sci_init_ports(); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1335 | register_console(&kgdb_console); |
| 1336 | return 0; |
| 1337 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1338 | console_initcall(kgdb_console_init); |
| 1339 | #endif /* CONFIG_SH_KGDB_CONSOLE */ |
| 1340 | |
| 1341 | #if defined(CONFIG_SH_KGDB_CONSOLE) |
| 1342 | #define SCI_CONSOLE &kgdb_console |
| 1343 | #elif defined(CONFIG_SERIAL_SH_SCI_CONSOLE) |
| 1344 | #define SCI_CONSOLE &serial_console |
| 1345 | #else |
Paul Mundt | b7a76e4 | 2006-02-01 03:06:06 -0800 | [diff] [blame] | 1346 | #define SCI_CONSOLE 0 |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1347 | #endif |
| 1348 | |
| 1349 | static char banner[] __initdata = |
| 1350 | KERN_INFO "SuperH SCI(F) driver initialized\n"; |
| 1351 | |
| 1352 | static struct uart_driver sci_uart_driver = { |
| 1353 | .owner = THIS_MODULE, |
| 1354 | .driver_name = "sci", |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1355 | .dev_name = "ttySC", |
| 1356 | .major = SCI_MAJOR, |
| 1357 | .minor = SCI_MINOR_START, |
Paul Mundt | e108b2c | 2006-09-27 16:32:13 +0900 | [diff] [blame] | 1358 | .nr = SCI_NPORTS, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1359 | .cons = SCI_CONSOLE, |
| 1360 | }; |
| 1361 | |
Paul Mundt | e108b2c | 2006-09-27 16:32:13 +0900 | [diff] [blame] | 1362 | /* |
| 1363 | * Register a set of serial devices attached to a platform device. The |
| 1364 | * list is terminated with a zero flags entry, which means we expect |
| 1365 | * all entries to have at least UPF_BOOT_AUTOCONF set. Platforms that need |
| 1366 | * remapping (such as sh64) should also set UPF_IOREMAP. |
| 1367 | */ |
| 1368 | static int __devinit sci_probe(struct platform_device *dev) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1369 | { |
Paul Mundt | e108b2c | 2006-09-27 16:32:13 +0900 | [diff] [blame] | 1370 | struct plat_sci_port *p = dev->dev.platform_data; |
| 1371 | int i; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1372 | |
Paul Mundt | 32351a2 | 2007-03-12 14:38:59 +0900 | [diff] [blame^] | 1373 | for (i = 0; p && p->flags != 0; p++, i++) { |
Paul Mundt | e108b2c | 2006-09-27 16:32:13 +0900 | [diff] [blame] | 1374 | struct sci_port *sciport = &sci_ports[i]; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1375 | |
Paul Mundt | 32351a2 | 2007-03-12 14:38:59 +0900 | [diff] [blame^] | 1376 | /* Sanity check */ |
| 1377 | if (unlikely(i == SCI_NPORTS)) { |
| 1378 | dev_notice(&dev->dev, "Attempting to register port " |
| 1379 | "%d when only %d are available.\n", |
| 1380 | i+1, SCI_NPORTS); |
| 1381 | dev_notice(&dev->dev, "Consider bumping " |
| 1382 | "CONFIG_SERIAL_SH_SCI_NR_UARTS!\n"); |
| 1383 | break; |
| 1384 | } |
| 1385 | |
Paul Mundt | e108b2c | 2006-09-27 16:32:13 +0900 | [diff] [blame] | 1386 | sciport->port.mapbase = p->mapbase; |
Paul Mundt | b7a76e4 | 2006-02-01 03:06:06 -0800 | [diff] [blame] | 1387 | |
Paul Mundt | e108b2c | 2006-09-27 16:32:13 +0900 | [diff] [blame] | 1388 | /* |
| 1389 | * For the simple (and majority of) cases where we don't need |
| 1390 | * to do any remapping, just cast the cookie directly. |
| 1391 | */ |
| 1392 | if (p->mapbase && !p->membase && !(p->flags & UPF_IOREMAP)) |
| 1393 | p->membase = (void __iomem *)p->mapbase; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1394 | |
Paul Mundt | e108b2c | 2006-09-27 16:32:13 +0900 | [diff] [blame] | 1395 | sciport->port.membase = p->membase; |
| 1396 | |
| 1397 | sciport->port.irq = p->irqs[SCIx_TXI_IRQ]; |
| 1398 | sciport->port.flags = p->flags; |
| 1399 | sciport->port.dev = &dev->dev; |
| 1400 | |
| 1401 | sciport->type = sciport->port.type = p->type; |
| 1402 | |
| 1403 | memcpy(&sciport->irqs, &p->irqs, sizeof(p->irqs)); |
| 1404 | |
| 1405 | uart_add_one_port(&sci_uart_driver, &sciport->port); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1406 | } |
| 1407 | |
Paul Mundt | fa5da2f | 2007-03-08 17:27:37 +0900 | [diff] [blame] | 1408 | #if defined(CONFIG_SH_KGDB) && !defined(CONFIG_SH_KGDB_CONSOLE) |
| 1409 | kgdb_sci_port = &sci_ports[kgdb_portnum]; |
| 1410 | kgdb_getchar = kgdb_sci_getchar; |
| 1411 | kgdb_putchar = kgdb_sci_putchar; |
| 1412 | #endif |
| 1413 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1414 | #ifdef CONFIG_CPU_FREQ |
| 1415 | cpufreq_register_notifier(&sci_nb, CPUFREQ_TRANSITION_NOTIFIER); |
Paul Mundt | e108b2c | 2006-09-27 16:32:13 +0900 | [diff] [blame] | 1416 | dev_info(&dev->dev, "sci: CPU frequency notifier registered\n"); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1417 | #endif |
| 1418 | |
| 1419 | #ifdef CONFIG_SH_STANDARD_BIOS |
| 1420 | sh_bios_gdb_detach(); |
| 1421 | #endif |
| 1422 | |
Paul Mundt | e108b2c | 2006-09-27 16:32:13 +0900 | [diff] [blame] | 1423 | return 0; |
| 1424 | } |
| 1425 | |
| 1426 | static int __devexit sci_remove(struct platform_device *dev) |
| 1427 | { |
| 1428 | int i; |
| 1429 | |
| 1430 | for (i = 0; i < SCI_NPORTS; i++) |
| 1431 | uart_remove_one_port(&sci_uart_driver, &sci_ports[i].port); |
| 1432 | |
| 1433 | return 0; |
| 1434 | } |
| 1435 | |
| 1436 | static int sci_suspend(struct platform_device *dev, pm_message_t state) |
| 1437 | { |
| 1438 | int i; |
| 1439 | |
| 1440 | for (i = 0; i < SCI_NPORTS; i++) { |
| 1441 | struct sci_port *p = &sci_ports[i]; |
| 1442 | |
| 1443 | if (p->type != PORT_UNKNOWN && p->port.dev == &dev->dev) |
| 1444 | uart_suspend_port(&sci_uart_driver, &p->port); |
| 1445 | } |
| 1446 | |
| 1447 | return 0; |
| 1448 | } |
| 1449 | |
| 1450 | static int sci_resume(struct platform_device *dev) |
| 1451 | { |
| 1452 | int i; |
| 1453 | |
| 1454 | for (i = 0; i < SCI_NPORTS; i++) { |
| 1455 | struct sci_port *p = &sci_ports[i]; |
| 1456 | |
| 1457 | if (p->type != PORT_UNKNOWN && p->port.dev == &dev->dev) |
| 1458 | uart_resume_port(&sci_uart_driver, &p->port); |
| 1459 | } |
| 1460 | |
| 1461 | return 0; |
| 1462 | } |
| 1463 | |
| 1464 | static struct platform_driver sci_driver = { |
| 1465 | .probe = sci_probe, |
| 1466 | .remove = __devexit_p(sci_remove), |
| 1467 | .suspend = sci_suspend, |
| 1468 | .resume = sci_resume, |
| 1469 | .driver = { |
| 1470 | .name = "sh-sci", |
| 1471 | .owner = THIS_MODULE, |
| 1472 | }, |
| 1473 | }; |
| 1474 | |
| 1475 | static int __init sci_init(void) |
| 1476 | { |
| 1477 | int ret; |
| 1478 | |
| 1479 | printk(banner); |
| 1480 | |
| 1481 | sci_init_ports(); |
| 1482 | |
| 1483 | ret = uart_register_driver(&sci_uart_driver); |
| 1484 | if (likely(ret == 0)) { |
| 1485 | ret = platform_driver_register(&sci_driver); |
| 1486 | if (unlikely(ret)) |
| 1487 | uart_unregister_driver(&sci_uart_driver); |
| 1488 | } |
| 1489 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1490 | return ret; |
| 1491 | } |
| 1492 | |
| 1493 | static void __exit sci_exit(void) |
| 1494 | { |
Paul Mundt | e108b2c | 2006-09-27 16:32:13 +0900 | [diff] [blame] | 1495 | platform_driver_unregister(&sci_driver); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1496 | uart_unregister_driver(&sci_uart_driver); |
| 1497 | } |
| 1498 | |
| 1499 | module_init(sci_init); |
| 1500 | module_exit(sci_exit); |
| 1501 | |
Paul Mundt | e108b2c | 2006-09-27 16:32:13 +0900 | [diff] [blame] | 1502 | MODULE_LICENSE("GPL"); |