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 |
Markus Brunner | 3ea6bc3 | 2007-08-20 08:59:33 +0900 | [diff] [blame] | 7 | * Modified to support SH7720 SCIF. Markus Brunner, Mark Jonas (Jul 2007). |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 8 | * |
| 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 Damm | d89ddd1 | 2007-07-25 11:42:56 +0900 | [diff] [blame] | 16 | * Removed SH7300 support (Jul 2007). |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 17 | * |
| 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 Mundt | 0b3d4ef | 2007-03-14 13:22:37 +0900 | [diff] [blame] | 22 | #if defined(CONFIG_SERIAL_SH_SCI_CONSOLE) && defined(CONFIG_MAGIC_SYSRQ) |
| 23 | #define SUPPORT_SYSRQ |
| 24 | #endif |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 25 | |
| 26 | #undef DEBUG |
| 27 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 28 | #include <linux/module.h> |
| 29 | #include <linux/errno.h> |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 30 | #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 Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 38 | #include <linux/ioport.h> |
| 39 | #include <linux/mm.h> |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 40 | #include <linux/init.h> |
| 41 | #include <linux/delay.h> |
| 42 | #include <linux/console.h> |
Paul Mundt | e108b2c | 2006-09-27 16:32:13 +0900 | [diff] [blame] | 43 | #include <linux/platform_device.h> |
Paul Mundt | 96de1a8 | 2008-02-26 14:52:45 +0900 | [diff] [blame] | 44 | #include <linux/serial_sci.h> |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 45 | |
| 46 | #ifdef CONFIG_CPU_FREQ |
| 47 | #include <linux/notifier.h> |
| 48 | #include <linux/cpufreq.h> |
| 49 | #endif |
| 50 | |
Paul Mundt | b7a76e4 | 2006-02-01 03:06:06 -0800 | [diff] [blame] | 51 | #if defined(CONFIG_SUPERH) && !defined(CONFIG_SUPERH64) |
Paul Mundt | fa5da2f | 2007-03-08 17:27:37 +0900 | [diff] [blame] | 52 | #include <linux/ctype.h> |
Paul Mundt | b7a76e4 | 2006-02-01 03:06:06 -0800 | [diff] [blame] | 53 | #include <asm/clock.h> |
Paul Mundt | e108b2c | 2006-09-27 16:32:13 +0900 | [diff] [blame] | 54 | #include <asm/sh_bios.h> |
| 55 | #include <asm/kgdb.h> |
Paul Mundt | b7a76e4 | 2006-02-01 03:06:06 -0800 | [diff] [blame] | 56 | #endif |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 57 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 58 | #include "sh-sci.h" |
| 59 | |
Paul Mundt | e108b2c | 2006-09-27 16:32:13 +0900 | [diff] [blame] | 60 | struct sci_port { |
| 61 | struct uart_port port; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 62 | |
Paul Mundt | e108b2c | 2006-09-27 16:32:13 +0900 | [diff] [blame] | 63 | /* Port type */ |
| 64 | unsigned int type; |
| 65 | |
| 66 | /* Port IRQs: ERI, RXI, TXI, BRI (optional) */ |
Paul Mundt | 32351a2 | 2007-03-12 14:38:59 +0900 | [diff] [blame] | 67 | unsigned int irqs[SCIx_NR_IRQS]; |
Paul Mundt | e108b2c | 2006-09-27 16:32:13 +0900 | [diff] [blame] | 68 | |
| 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 pervushin | 1534a3b | 2007-04-24 13:41:12 +0900 | [diff] [blame] | 82 | |
Paul Mundt | 005a336 | 2007-04-26 11:45:32 +0900 | [diff] [blame] | 83 | #if defined(CONFIG_SUPERH) && !defined(CONFIG_SUPERH64) |
dmitry pervushin | 1534a3b | 2007-04-24 13:41:12 +0900 | [diff] [blame] | 84 | /* Port clock */ |
| 85 | struct clk *clk; |
Paul Mundt | 005a336 | 2007-04-26 11:45:32 +0900 | [diff] [blame] | 86 | #endif |
Paul Mundt | e108b2c | 2006-09-27 16:32:13 +0900 | [diff] [blame] | 87 | }; |
| 88 | |
| 89 | #ifdef CONFIG_SH_KGDB |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 90 | static struct sci_port *kgdb_sci_port; |
Paul Mundt | e108b2c | 2006-09-27 16:32:13 +0900 | [diff] [blame] | 91 | #endif |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 92 | |
| 93 | #ifdef CONFIG_SERIAL_SH_SCI_CONSOLE |
Paul Mundt | e108b2c | 2006-09-27 16:32:13 +0900 | [diff] [blame] | 94 | static struct sci_port *serial_console_port; |
| 95 | #endif |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 96 | |
| 97 | /* Function prototypes */ |
Russell King | b129a8c | 2005-08-31 10:12:14 +0100 | [diff] [blame] | 98 | static void sci_stop_tx(struct uart_port *port); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 99 | |
Paul Mundt | e108b2c | 2006-09-27 16:32:13 +0900 | [diff] [blame] | 100 | #define SCI_NPORTS CONFIG_SERIAL_SH_SCI_NR_UARTS |
| 101 | |
| 102 | static struct sci_port sci_ports[SCI_NPORTS]; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 103 | static struct uart_driver sci_uart_driver; |
| 104 | |
Paul Mundt | e108b2c | 2006-09-27 16:32:13 +0900 | [diff] [blame] | 105 | #if defined(CONFIG_SERIAL_SH_SCI_CONSOLE) && \ |
| 106 | defined(CONFIG_SH_STANDARD_BIOS) || defined(CONFIG_SH_KGDB) |
| 107 | static inline void handle_error(struct uart_port *port) |
| 108 | { |
| 109 | /* Clear error flags */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 110 | sci_out(port, SCxSR, SCxSR_ERROR_CLEAR(port)); |
| 111 | } |
| 112 | |
| 113 | static int get_char(struct uart_port *port) |
| 114 | { |
| 115 | unsigned long flags; |
| 116 | unsigned short status; |
| 117 | int c; |
| 118 | |
Paul Mundt | e108b2c | 2006-09-27 16:32:13 +0900 | [diff] [blame] | 119 | spin_lock_irqsave(&port->lock, flags); |
| 120 | do { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 121 | 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 Mundt | e108b2c | 2006-09-27 16:32:13 +0900 | [diff] [blame] | 130 | spin_unlock_irqrestore(&port->lock, flags); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 131 | |
| 132 | return c; |
| 133 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 134 | #endif /* CONFIG_SH_STANDARD_BIOS || CONFIG_SH_KGDB */ |
| 135 | |
Paul Mundt | e108b2c | 2006-09-27 16:32:13 +0900 | [diff] [blame] | 136 | #if defined(CONFIG_SERIAL_SH_SCI_CONSOLE) || defined(CONFIG_SH_KGDB) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 137 | static void put_char(struct uart_port *port, char c) |
| 138 | { |
| 139 | unsigned long flags; |
| 140 | unsigned short status; |
| 141 | |
Paul Mundt | e108b2c | 2006-09-27 16:32:13 +0900 | [diff] [blame] | 142 | spin_lock_irqsave(&port->lock, flags); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 143 | |
| 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 Mundt | e108b2c | 2006-09-27 16:32:13 +0900 | [diff] [blame] | 152 | spin_unlock_irqrestore(&port->lock, flags); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 153 | } |
Paul Mundt | e108b2c | 2006-09-27 16:32:13 +0900 | [diff] [blame] | 154 | #endif |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 155 | |
Paul Mundt | e108b2c | 2006-09-27 16:32:13 +0900 | [diff] [blame] | 156 | #ifdef CONFIG_SERIAL_SH_SCI_CONSOLE |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 157 | static 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 Mundt | b7a76e4 | 2006-02-01 03:06:06 -0800 | [diff] [blame] | 168 | /* This call only does a trap the first time it is |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 169 | * 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 Mundt | fa5da2f | 2007-03-08 17:27:37 +0900 | [diff] [blame] | 174 | usegdb |= (kgdb_in_gdb_mode && (sci_port == kgdb_sci_port)); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 175 | #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 Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 209 | #ifdef CONFIG_SH_KGDB |
Paul Mundt | e108b2c | 2006-09-27 16:32:13 +0900 | [diff] [blame] | 210 | static int kgdb_sci_getchar(void) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 211 | { |
| 212 | int c; |
| 213 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 214 | /* Keep trying to read a character, this could be neater */ |
Paul Mundt | fa5da2f | 2007-03-08 17:27:37 +0900 | [diff] [blame] | 215 | while ((c = get_char(&kgdb_sci_port->port)) < 0) |
Paul Mundt | e108b2c | 2006-09-27 16:32:13 +0900 | [diff] [blame] | 216 | cpu_relax(); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 217 | |
| 218 | return c; |
| 219 | } |
| 220 | |
Paul Mundt | e108b2c | 2006-09-27 16:32:13 +0900 | [diff] [blame] | 221 | static inline void kgdb_sci_putchar(int c) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 222 | { |
Paul Mundt | fa5da2f | 2007-03-08 17:27:37 +0900 | [diff] [blame] | 223 | put_char(&kgdb_sci_port->port, c); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 224 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 225 | #endif /* CONFIG_SH_KGDB */ |
| 226 | |
| 227 | #if defined(__H8300S__) |
| 228 | enum { sci_disable, sci_enable }; |
| 229 | |
Paul Mundt | e108b2c | 2006-09-27 16:32:13 +0900 | [diff] [blame] | 230 | static void h8300_sci_config(struct uart_port* port, unsigned int ctrl) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 231 | { |
| 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 Mundt | e108b2c | 2006-09-27 16:32:13 +0900 | [diff] [blame] | 242 | |
| 243 | static inline void h8300_sci_enable(struct uart_port *port) |
| 244 | { |
| 245 | h8300_sci_config(port, sci_enable); |
| 246 | } |
| 247 | |
| 248 | static inline void h8300_sci_disable(struct uart_port *port) |
| 249 | { |
| 250 | h8300_sci_config(port, sci_disable); |
| 251 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 252 | #endif |
| 253 | |
Paul Mundt | e108b2c | 2006-09-27 16:32:13 +0900 | [diff] [blame] | 254 | #if defined(SCI_ONLY) || defined(SCI_AND_SCIF) && \ |
| 255 | defined(__H8300H__) || defined(__H8300S__) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 256 | static 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 Mundt | e108b2c | 2006-09-27 16:32:13 +0900 | [diff] [blame] | 261 | 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 Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 268 | /* tx mark output*/ |
| 269 | H8300_SCI_DR(ch) |= h8300_sci_pins[ch].tx; |
| 270 | } |
Paul Mundt | e108b2c | 2006-09-27 16:32:13 +0900 | [diff] [blame] | 271 | #else |
| 272 | #define sci_init_pins_sci NULL |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 273 | #endif |
Paul Mundt | e108b2c | 2006-09-27 16:32:13 +0900 | [diff] [blame] | 274 | |
| 275 | #if defined(CONFIG_CPU_SUBTYPE_SH7707) || defined(CONFIG_CPU_SUBTYPE_SH7709) |
| 276 | static 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 Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 291 | #endif |
| 292 | |
| 293 | #if defined(SCIF_ONLY) || defined(SCI_AND_SCIF) |
Magnus Damm | d89ddd1 | 2007-07-25 11:42:56 +0900 | [diff] [blame] | 294 | #if defined(CONFIG_CPU_SUBTYPE_SH7710) || defined(CONFIG_CPU_SUBTYPE_SH7712) |
Nobuhiro Iwamatsu | 9465a54 | 2007-03-27 18:13:51 +0900 | [diff] [blame] | 295 | static 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 Shimoda | 31a49c4 | 2007-12-26 11:45:06 +0900 | [diff] [blame] | 305 | #elif defined(CONFIG_CPU_SUBTYPE_SH7720) || defined(CONFIG_CPU_SUBTYPE_SH7721) |
Markus Brunner | 3ea6bc3 | 2007-08-20 08:59:33 +0900 | [diff] [blame] | 306 | static 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 | } |
Paul Mundt | b7a76e4 | 2006-02-01 03:06:06 -0800 | [diff] [blame] | 336 | #elif defined(CONFIG_CPU_SH3) |
Paul Mundt | e108b2c | 2006-09-27 16:32:13 +0900 | [diff] [blame] | 337 | /* For SH7705, SH7706, SH7707, SH7709, SH7709A, SH7729 */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 338 | static void sci_init_pins_scif(struct uart_port *port, unsigned int cflag) |
| 339 | { |
| 340 | unsigned int fcr_val = 0; |
Paul Mundt | b7a76e4 | 2006-02-01 03:06:06 -0800 | [diff] [blame] | 341 | unsigned short data; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 342 | |
Paul Mundt | b7a76e4 | 2006-02-01 03:06:06 -0800 | [diff] [blame] | 343 | /* We need to set SCPCR to enable RTS/CTS */ |
| 344 | data = ctrl_inw(SCPCR); |
| 345 | /* Clear out SCP7MD1,0, SCP6MD1,0, SCP4MD1,0*/ |
| 346 | ctrl_outw(data & 0x0fcf, SCPCR); |
| 347 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 348 | if (cflag & CRTSCTS) |
| 349 | fcr_val |= SCFCR_MCE; |
| 350 | else { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 351 | /* We need to set SCPCR to enable RTS/CTS */ |
| 352 | data = ctrl_inw(SCPCR); |
| 353 | /* Clear out SCP7MD1,0, SCP4MD1,0, |
| 354 | Set SCP6MD1,0 = {01} (output) */ |
Paul Mundt | b7a76e4 | 2006-02-01 03:06:06 -0800 | [diff] [blame] | 355 | ctrl_outw((data & 0x0fcf) | 0x1000, SCPCR); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 356 | |
| 357 | data = ctrl_inb(SCPDR); |
| 358 | /* Set /RTS2 (bit6) = 0 */ |
Paul Mundt | b7a76e4 | 2006-02-01 03:06:06 -0800 | [diff] [blame] | 359 | ctrl_outb(data & 0xbf, SCPDR); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 360 | } |
Paul Mundt | b7a76e4 | 2006-02-01 03:06:06 -0800 | [diff] [blame] | 361 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 362 | sci_out(port, SCFCR, fcr_val); |
| 363 | } |
Paul Mundt | 41504c3 | 2006-12-11 20:28:03 +0900 | [diff] [blame] | 364 | #elif defined(CONFIG_CPU_SUBTYPE_SH7722) |
| 365 | static void sci_init_pins_scif(struct uart_port *port, unsigned int cflag) |
| 366 | { |
| 367 | unsigned int fcr_val = 0; |
| 368 | |
| 369 | if (cflag & CRTSCTS) { |
| 370 | fcr_val |= SCFCR_MCE; |
| 371 | |
| 372 | ctrl_outw(0x0000, PORT_PSCR); |
| 373 | } else { |
| 374 | unsigned short data; |
| 375 | |
| 376 | data = ctrl_inw(PORT_PSCR); |
| 377 | data &= 0x033f; |
| 378 | data |= 0x0400; |
| 379 | ctrl_outw(data, PORT_PSCR); |
| 380 | |
| 381 | ctrl_outw(ctrl_inw(SCSPTR0) & 0x17, SCSPTR0); |
| 382 | } |
| 383 | |
| 384 | sci_out(port, SCFCR, fcr_val); |
| 385 | } |
Paul Mundt | 178dd0c | 2008-04-09 17:56:18 +0900 | [diff] [blame] | 386 | #elif defined(CONFIG_CPU_SUBTYPE_SH7723) |
| 387 | static void sci_init_pins_scif(struct uart_port *port, unsigned int cflag) |
| 388 | { |
| 389 | /* Nothing to do here.. */ |
| 390 | sci_out(port, SCFCR, 0); |
| 391 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 392 | #else |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 393 | /* For SH7750 */ |
| 394 | static void sci_init_pins_scif(struct uart_port *port, unsigned int cflag) |
| 395 | { |
| 396 | unsigned int fcr_val = 0; |
| 397 | |
| 398 | if (cflag & CRTSCTS) { |
| 399 | fcr_val |= SCFCR_MCE; |
| 400 | } else { |
Magnus Damm | 9109a30 | 2008-02-08 17:31:24 +0900 | [diff] [blame] | 401 | #if defined(CONFIG_CPU_SUBTYPE_SH7343) || defined(CONFIG_CPU_SUBTYPE_SH7366) |
Paul Mundt | e108b2c | 2006-09-27 16:32:13 +0900 | [diff] [blame] | 402 | /* Nothing */ |
Yoshihiro Shimoda | 7d740a0 | 2008-01-07 14:40:07 +0900 | [diff] [blame] | 403 | #elif defined(CONFIG_CPU_SUBTYPE_SH7763) || \ |
| 404 | defined(CONFIG_CPU_SUBTYPE_SH7780) || \ |
Paul Mundt | 2b1bd1a | 2007-06-20 18:27:10 +0900 | [diff] [blame] | 405 | defined(CONFIG_CPU_SUBTYPE_SH7785) || \ |
| 406 | defined(CONFIG_CPU_SUBTYPE_SHX3) |
Paul Mundt | b7a76e4 | 2006-02-01 03:06:06 -0800 | [diff] [blame] | 407 | ctrl_outw(0x0080, SCSPTR0); /* Set RTS = 1 */ |
| 408 | #else |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 409 | ctrl_outw(0x0080, SCSPTR2); /* Set RTS = 1 */ |
Paul Mundt | b7a76e4 | 2006-02-01 03:06:06 -0800 | [diff] [blame] | 410 | #endif |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 411 | } |
| 412 | sci_out(port, SCFCR, fcr_val); |
| 413 | } |
Paul Mundt | e108b2c | 2006-09-27 16:32:13 +0900 | [diff] [blame] | 414 | #endif |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 415 | |
Paul Mundt | 32351a2 | 2007-03-12 14:38:59 +0900 | [diff] [blame] | 416 | #if defined(CONFIG_CPU_SUBTYPE_SH7760) || \ |
Yoshihiro Shimoda | 7d740a0 | 2008-01-07 14:40:07 +0900 | [diff] [blame] | 417 | defined(CONFIG_CPU_SUBTYPE_SH7763) || \ |
Paul Mundt | 32351a2 | 2007-03-12 14:38:59 +0900 | [diff] [blame] | 418 | defined(CONFIG_CPU_SUBTYPE_SH7780) || \ |
| 419 | defined(CONFIG_CPU_SUBTYPE_SH7785) |
Paul Mundt | e108b2c | 2006-09-27 16:32:13 +0900 | [diff] [blame] | 420 | static inline int scif_txroom(struct uart_port *port) |
| 421 | { |
Yutaro Ebihara | cae167d | 2008-03-11 13:58:50 +0900 | [diff] [blame] | 422 | return SCIF_TXROOM_MAX - (sci_in(port, SCTFDR) & 0xff); |
Paul Mundt | e108b2c | 2006-09-27 16:32:13 +0900 | [diff] [blame] | 423 | } |
| 424 | |
| 425 | static inline int scif_rxroom(struct uart_port *port) |
| 426 | { |
Yutaro Ebihara | cae167d | 2008-03-11 13:58:50 +0900 | [diff] [blame] | 427 | return sci_in(port, SCRFDR) & 0xff; |
Paul Mundt | e108b2c | 2006-09-27 16:32:13 +0900 | [diff] [blame] | 428 | } |
| 429 | #else |
| 430 | static inline int scif_txroom(struct uart_port *port) |
| 431 | { |
| 432 | return SCIF_TXROOM_MAX - (sci_in(port, SCFDR) >> 8); |
| 433 | } |
| 434 | |
| 435 | static inline int scif_rxroom(struct uart_port *port) |
| 436 | { |
| 437 | return sci_in(port, SCFDR) & SCIF_RFDC_MASK; |
| 438 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 439 | #endif |
| 440 | #endif /* SCIF_ONLY || SCI_AND_SCIF */ |
| 441 | |
Paul Mundt | e108b2c | 2006-09-27 16:32:13 +0900 | [diff] [blame] | 442 | static inline int sci_txroom(struct uart_port *port) |
| 443 | { |
| 444 | return ((sci_in(port, SCxSR) & SCI_TDRE) != 0); |
| 445 | } |
| 446 | |
| 447 | static inline int sci_rxroom(struct uart_port *port) |
| 448 | { |
| 449 | return ((sci_in(port, SCxSR) & SCxSR_RDxF(port)) != 0); |
| 450 | } |
| 451 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 452 | /* ********************************************************************** * |
| 453 | * the interrupt related routines * |
| 454 | * ********************************************************************** */ |
| 455 | |
| 456 | static void sci_transmit_chars(struct uart_port *port) |
| 457 | { |
| 458 | struct circ_buf *xmit = &port->info->xmit; |
| 459 | unsigned int stopped = uart_tx_stopped(port); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 460 | unsigned short status; |
| 461 | unsigned short ctrl; |
Paul Mundt | e108b2c | 2006-09-27 16:32:13 +0900 | [diff] [blame] | 462 | int count; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 463 | |
| 464 | status = sci_in(port, SCxSR); |
| 465 | if (!(status & SCxSR_TDxE(port))) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 466 | ctrl = sci_in(port, SCSCR); |
| 467 | if (uart_circ_empty(xmit)) { |
| 468 | ctrl &= ~SCI_CTRL_FLAGS_TIE; |
| 469 | } else { |
| 470 | ctrl |= SCI_CTRL_FLAGS_TIE; |
| 471 | } |
| 472 | sci_out(port, SCSCR, ctrl); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 473 | return; |
| 474 | } |
| 475 | |
Paul Mundt | e108b2c | 2006-09-27 16:32:13 +0900 | [diff] [blame] | 476 | #ifndef SCI_ONLY |
| 477 | if (port->type == PORT_SCIF) |
| 478 | count = scif_txroom(port); |
| 479 | else |
Paul Mundt | b7a76e4 | 2006-02-01 03:06:06 -0800 | [diff] [blame] | 480 | #endif |
Paul Mundt | e108b2c | 2006-09-27 16:32:13 +0900 | [diff] [blame] | 481 | count = sci_txroom(port); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 482 | |
| 483 | do { |
| 484 | unsigned char c; |
| 485 | |
| 486 | if (port->x_char) { |
| 487 | c = port->x_char; |
| 488 | port->x_char = 0; |
| 489 | } else if (!uart_circ_empty(xmit) && !stopped) { |
| 490 | c = xmit->buf[xmit->tail]; |
| 491 | xmit->tail = (xmit->tail + 1) & (UART_XMIT_SIZE - 1); |
| 492 | } else { |
| 493 | break; |
| 494 | } |
| 495 | |
| 496 | sci_out(port, SCxTDR, c); |
| 497 | |
| 498 | port->icount.tx++; |
| 499 | } while (--count > 0); |
| 500 | |
| 501 | sci_out(port, SCxSR, SCxSR_TDxE_CLEAR(port)); |
| 502 | |
| 503 | if (uart_circ_chars_pending(xmit) < WAKEUP_CHARS) |
| 504 | uart_write_wakeup(port); |
| 505 | if (uart_circ_empty(xmit)) { |
Russell King | b129a8c | 2005-08-31 10:12:14 +0100 | [diff] [blame] | 506 | sci_stop_tx(port); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 507 | } else { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 508 | ctrl = sci_in(port, SCSCR); |
| 509 | |
| 510 | #if !defined(SCI_ONLY) |
| 511 | if (port->type == PORT_SCIF) { |
| 512 | sci_in(port, SCxSR); /* Dummy read */ |
| 513 | sci_out(port, SCxSR, SCxSR_TDxE_CLEAR(port)); |
| 514 | } |
| 515 | #endif |
| 516 | |
| 517 | ctrl |= SCI_CTRL_FLAGS_TIE; |
| 518 | sci_out(port, SCSCR, ctrl); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 519 | } |
| 520 | } |
| 521 | |
| 522 | /* On SH3, SCIF may read end-of-break as a space->mark char */ |
| 523 | #define STEPFN(c) ({int __c=(c); (((__c-1)|(__c)) == -1); }) |
| 524 | |
David Howells | 7d12e78 | 2006-10-05 14:55:46 +0100 | [diff] [blame] | 525 | static inline void sci_receive_chars(struct uart_port *port) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 526 | { |
Paul Mundt | e108b2c | 2006-09-27 16:32:13 +0900 | [diff] [blame] | 527 | struct sci_port *sci_port = (struct sci_port *)port; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 528 | struct tty_struct *tty = port->info->tty; |
| 529 | int i, count, copied = 0; |
| 530 | unsigned short status; |
Alan Cox | 33f0f88 | 2006-01-09 20:54:13 -0800 | [diff] [blame] | 531 | unsigned char flag; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 532 | |
| 533 | status = sci_in(port, SCxSR); |
| 534 | if (!(status & SCxSR_RDxF(port))) |
| 535 | return; |
| 536 | |
| 537 | while (1) { |
| 538 | #if !defined(SCI_ONLY) |
Paul Mundt | e108b2c | 2006-09-27 16:32:13 +0900 | [diff] [blame] | 539 | if (port->type == PORT_SCIF) |
| 540 | count = scif_rxroom(port); |
| 541 | else |
Paul Mundt | b7a76e4 | 2006-02-01 03:06:06 -0800 | [diff] [blame] | 542 | #endif |
Paul Mundt | e108b2c | 2006-09-27 16:32:13 +0900 | [diff] [blame] | 543 | count = sci_rxroom(port); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 544 | |
| 545 | /* 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] | 546 | count = tty_buffer_request_room(tty, count); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 547 | |
| 548 | /* If for any reason we can't copy more data, we're done! */ |
| 549 | if (count == 0) |
| 550 | break; |
| 551 | |
| 552 | if (port->type == PORT_SCI) { |
| 553 | char c = sci_in(port, SCxRDR); |
David Howells | 7d12e78 | 2006-10-05 14:55:46 +0100 | [diff] [blame] | 554 | if (uart_handle_sysrq_char(port, c) || sci_port->break_flag) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 555 | count = 0; |
Paul Mundt | e108b2c | 2006-09-27 16:32:13 +0900 | [diff] [blame] | 556 | else { |
| 557 | tty_insert_flip_char(tty, c, TTY_NORMAL); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 558 | } |
| 559 | } else { |
| 560 | for (i=0; i<count; i++) { |
| 561 | char c = sci_in(port, SCxRDR); |
| 562 | status = sci_in(port, SCxSR); |
| 563 | #if defined(CONFIG_CPU_SH3) |
| 564 | /* Skip "chars" during break */ |
Paul Mundt | e108b2c | 2006-09-27 16:32:13 +0900 | [diff] [blame] | 565 | if (sci_port->break_flag) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 566 | if ((c == 0) && |
| 567 | (status & SCxSR_FER(port))) { |
| 568 | count--; i--; |
| 569 | continue; |
| 570 | } |
Paul Mundt | e108b2c | 2006-09-27 16:32:13 +0900 | [diff] [blame] | 571 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 572 | /* Nonzero => end-of-break */ |
| 573 | pr_debug("scif: debounce<%02x>\n", c); |
Paul Mundt | e108b2c | 2006-09-27 16:32:13 +0900 | [diff] [blame] | 574 | sci_port->break_flag = 0; |
| 575 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 576 | if (STEPFN(c)) { |
| 577 | count--; i--; |
| 578 | continue; |
| 579 | } |
| 580 | } |
| 581 | #endif /* CONFIG_CPU_SH3 */ |
David Howells | 7d12e78 | 2006-10-05 14:55:46 +0100 | [diff] [blame] | 582 | if (uart_handle_sysrq_char(port, c)) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 583 | count--; i--; |
| 584 | continue; |
| 585 | } |
| 586 | |
| 587 | /* Store data and status */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 588 | if (status&SCxSR_FER(port)) { |
Alan Cox | 33f0f88 | 2006-01-09 20:54:13 -0800 | [diff] [blame] | 589 | flag = TTY_FRAME; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 590 | pr_debug("sci: frame error\n"); |
| 591 | } else if (status&SCxSR_PER(port)) { |
Alan Cox | 33f0f88 | 2006-01-09 20:54:13 -0800 | [diff] [blame] | 592 | flag = TTY_PARITY; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 593 | pr_debug("sci: parity error\n"); |
Alan Cox | 33f0f88 | 2006-01-09 20:54:13 -0800 | [diff] [blame] | 594 | } else |
| 595 | flag = TTY_NORMAL; |
| 596 | tty_insert_flip_char(tty, c, flag); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 597 | } |
| 598 | } |
| 599 | |
| 600 | sci_in(port, SCxSR); /* dummy read */ |
| 601 | sci_out(port, SCxSR, SCxSR_RDxF_CLEAR(port)); |
| 602 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 603 | copied += count; |
| 604 | port->icount.rx += count; |
| 605 | } |
| 606 | |
| 607 | if (copied) { |
| 608 | /* Tell the rest of the system the news. New characters! */ |
| 609 | tty_flip_buffer_push(tty); |
| 610 | } else { |
| 611 | sci_in(port, SCxSR); /* dummy read */ |
| 612 | sci_out(port, SCxSR, SCxSR_RDxF_CLEAR(port)); |
| 613 | } |
| 614 | } |
| 615 | |
| 616 | #define SCI_BREAK_JIFFIES (HZ/20) |
| 617 | /* The sci generates interrupts during the break, |
| 618 | * 1 per millisecond or so during the break period, for 9600 baud. |
| 619 | * So dont bother disabling interrupts. |
| 620 | * But dont want more than 1 break event. |
| 621 | * Use a kernel timer to periodically poll the rx line until |
| 622 | * the break is finished. |
| 623 | */ |
| 624 | static void sci_schedule_break_timer(struct sci_port *port) |
| 625 | { |
| 626 | port->break_timer.expires = jiffies + SCI_BREAK_JIFFIES; |
| 627 | add_timer(&port->break_timer); |
| 628 | } |
| 629 | /* Ensure that two consecutive samples find the break over. */ |
| 630 | static void sci_break_timer(unsigned long data) |
| 631 | { |
Paul Mundt | e108b2c | 2006-09-27 16:32:13 +0900 | [diff] [blame] | 632 | struct sci_port *port = (struct sci_port *)data; |
| 633 | |
| 634 | if (sci_rxd_in(&port->port) == 0) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 635 | port->break_flag = 1; |
Paul Mundt | e108b2c | 2006-09-27 16:32:13 +0900 | [diff] [blame] | 636 | sci_schedule_break_timer(port); |
| 637 | } else if (port->break_flag == 1) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 638 | /* break is over. */ |
| 639 | port->break_flag = 2; |
Paul Mundt | e108b2c | 2006-09-27 16:32:13 +0900 | [diff] [blame] | 640 | sci_schedule_break_timer(port); |
| 641 | } else |
| 642 | port->break_flag = 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 643 | } |
| 644 | |
| 645 | static inline int sci_handle_errors(struct uart_port *port) |
| 646 | { |
| 647 | int copied = 0; |
| 648 | unsigned short status = sci_in(port, SCxSR); |
| 649 | struct tty_struct *tty = port->info->tty; |
| 650 | |
Paul Mundt | e108b2c | 2006-09-27 16:32:13 +0900 | [diff] [blame] | 651 | if (status & SCxSR_ORER(port)) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 652 | /* overrun error */ |
Paul Mundt | e108b2c | 2006-09-27 16:32:13 +0900 | [diff] [blame] | 653 | if (tty_insert_flip_char(tty, 0, TTY_OVERRUN)) |
Alan Cox | 33f0f88 | 2006-01-09 20:54:13 -0800 | [diff] [blame] | 654 | copied++; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 655 | pr_debug("sci: overrun error\n"); |
| 656 | } |
| 657 | |
Paul Mundt | e108b2c | 2006-09-27 16:32:13 +0900 | [diff] [blame] | 658 | if (status & SCxSR_FER(port)) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 659 | if (sci_rxd_in(port) == 0) { |
| 660 | /* Notify of BREAK */ |
Paul Mundt | e108b2c | 2006-09-27 16:32:13 +0900 | [diff] [blame] | 661 | struct sci_port *sci_port = (struct sci_port *)port; |
| 662 | |
| 663 | if (!sci_port->break_flag) { |
| 664 | sci_port->break_flag = 1; |
| 665 | sci_schedule_break_timer(sci_port); |
| 666 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 667 | /* Do sysrq handling. */ |
Paul Mundt | e108b2c | 2006-09-27 16:32:13 +0900 | [diff] [blame] | 668 | if (uart_handle_break(port)) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 669 | return 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 670 | pr_debug("sci: BREAK detected\n"); |
Paul Mundt | e108b2c | 2006-09-27 16:32:13 +0900 | [diff] [blame] | 671 | if (tty_insert_flip_char(tty, 0, TTY_BREAK)) |
Alan Cox | 33f0f88 | 2006-01-09 20:54:13 -0800 | [diff] [blame] | 672 | copied++; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 673 | } |
Paul Mundt | e108b2c | 2006-09-27 16:32:13 +0900 | [diff] [blame] | 674 | } else { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 675 | /* frame error */ |
Paul Mundt | e108b2c | 2006-09-27 16:32:13 +0900 | [diff] [blame] | 676 | if (tty_insert_flip_char(tty, 0, TTY_FRAME)) |
Alan Cox | 33f0f88 | 2006-01-09 20:54:13 -0800 | [diff] [blame] | 677 | copied++; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 678 | pr_debug("sci: frame error\n"); |
| 679 | } |
| 680 | } |
| 681 | |
Paul Mundt | e108b2c | 2006-09-27 16:32:13 +0900 | [diff] [blame] | 682 | if (status & SCxSR_PER(port)) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 683 | /* parity error */ |
Paul Mundt | e108b2c | 2006-09-27 16:32:13 +0900 | [diff] [blame] | 684 | if (tty_insert_flip_char(tty, 0, TTY_PARITY)) |
| 685 | copied++; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 686 | pr_debug("sci: parity error\n"); |
| 687 | } |
| 688 | |
Alan Cox | 33f0f88 | 2006-01-09 20:54:13 -0800 | [diff] [blame] | 689 | if (copied) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 690 | tty_flip_buffer_push(tty); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 691 | |
| 692 | return copied; |
| 693 | } |
| 694 | |
| 695 | static inline int sci_handle_breaks(struct uart_port *port) |
| 696 | { |
| 697 | int copied = 0; |
| 698 | unsigned short status = sci_in(port, SCxSR); |
| 699 | struct tty_struct *tty = port->info->tty; |
| 700 | struct sci_port *s = &sci_ports[port->line]; |
| 701 | |
Paul Mundt | 0b3d4ef | 2007-03-14 13:22:37 +0900 | [diff] [blame] | 702 | if (uart_handle_break(port)) |
| 703 | return 0; |
| 704 | |
Paul Mundt | b7a76e4 | 2006-02-01 03:06:06 -0800 | [diff] [blame] | 705 | if (!s->break_flag && status & SCxSR_BRK(port)) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 706 | #if defined(CONFIG_CPU_SH3) |
| 707 | /* Debounce break */ |
| 708 | s->break_flag = 1; |
| 709 | #endif |
| 710 | /* Notify of BREAK */ |
Paul Mundt | e108b2c | 2006-09-27 16:32:13 +0900 | [diff] [blame] | 711 | if (tty_insert_flip_char(tty, 0, TTY_BREAK)) |
Alan Cox | 33f0f88 | 2006-01-09 20:54:13 -0800 | [diff] [blame] | 712 | copied++; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 713 | pr_debug("sci: BREAK detected\n"); |
| 714 | } |
| 715 | |
| 716 | #if defined(SCIF_ORER) |
| 717 | /* XXX: Handle SCIF overrun error */ |
| 718 | if (port->type == PORT_SCIF && (sci_in(port, SCLSR) & SCIF_ORER) != 0) { |
| 719 | sci_out(port, SCLSR, 0); |
Paul Mundt | e108b2c | 2006-09-27 16:32:13 +0900 | [diff] [blame] | 720 | if (tty_insert_flip_char(tty, 0, TTY_OVERRUN)) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 721 | copied++; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 722 | pr_debug("sci: overrun error\n"); |
| 723 | } |
| 724 | } |
| 725 | #endif |
| 726 | |
Alan Cox | 33f0f88 | 2006-01-09 20:54:13 -0800 | [diff] [blame] | 727 | if (copied) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 728 | tty_flip_buffer_push(tty); |
Paul Mundt | e108b2c | 2006-09-27 16:32:13 +0900 | [diff] [blame] | 729 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 730 | return copied; |
| 731 | } |
| 732 | |
David Howells | 7d12e78 | 2006-10-05 14:55:46 +0100 | [diff] [blame] | 733 | static irqreturn_t sci_rx_interrupt(int irq, void *port) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 734 | { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 735 | /* I think sci_receive_chars has to be called irrespective |
| 736 | * of whether the I_IXOFF is set, otherwise, how is the interrupt |
| 737 | * to be disabled? |
| 738 | */ |
David Howells | 7d12e78 | 2006-10-05 14:55:46 +0100 | [diff] [blame] | 739 | sci_receive_chars(port); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 740 | |
| 741 | return IRQ_HANDLED; |
| 742 | } |
| 743 | |
David Howells | 7d12e78 | 2006-10-05 14:55:46 +0100 | [diff] [blame] | 744 | static irqreturn_t sci_tx_interrupt(int irq, void *ptr) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 745 | { |
| 746 | struct uart_port *port = ptr; |
| 747 | |
Paul Mundt | e108b2c | 2006-09-27 16:32:13 +0900 | [diff] [blame] | 748 | spin_lock_irq(&port->lock); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 749 | sci_transmit_chars(port); |
Paul Mundt | e108b2c | 2006-09-27 16:32:13 +0900 | [diff] [blame] | 750 | spin_unlock_irq(&port->lock); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 751 | |
| 752 | return IRQ_HANDLED; |
| 753 | } |
| 754 | |
David Howells | 7d12e78 | 2006-10-05 14:55:46 +0100 | [diff] [blame] | 755 | static irqreturn_t sci_er_interrupt(int irq, void *ptr) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 756 | { |
| 757 | struct uart_port *port = ptr; |
| 758 | |
| 759 | /* Handle errors */ |
| 760 | if (port->type == PORT_SCI) { |
| 761 | if (sci_handle_errors(port)) { |
| 762 | /* discard character in rx buffer */ |
| 763 | sci_in(port, SCxSR); |
| 764 | sci_out(port, SCxSR, SCxSR_RDxF_CLEAR(port)); |
| 765 | } |
| 766 | } else { |
| 767 | #if defined(SCIF_ORER) |
| 768 | if((sci_in(port, SCLSR) & SCIF_ORER) != 0) { |
| 769 | struct tty_struct *tty = port->info->tty; |
| 770 | |
| 771 | sci_out(port, SCLSR, 0); |
Alan Cox | 33f0f88 | 2006-01-09 20:54:13 -0800 | [diff] [blame] | 772 | tty_insert_flip_char(tty, 0, TTY_OVERRUN); |
| 773 | tty_flip_buffer_push(tty); |
| 774 | pr_debug("scif: overrun error\n"); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 775 | } |
| 776 | #endif |
David Howells | 7d12e78 | 2006-10-05 14:55:46 +0100 | [diff] [blame] | 777 | sci_rx_interrupt(irq, ptr); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 778 | } |
| 779 | |
| 780 | sci_out(port, SCxSR, SCxSR_ERROR_CLEAR(port)); |
| 781 | |
| 782 | /* Kick the transmission */ |
David Howells | 7d12e78 | 2006-10-05 14:55:46 +0100 | [diff] [blame] | 783 | sci_tx_interrupt(irq, ptr); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 784 | |
| 785 | return IRQ_HANDLED; |
| 786 | } |
| 787 | |
David Howells | 7d12e78 | 2006-10-05 14:55:46 +0100 | [diff] [blame] | 788 | static irqreturn_t sci_br_interrupt(int irq, void *ptr) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 789 | { |
| 790 | struct uart_port *port = ptr; |
| 791 | |
| 792 | /* Handle BREAKs */ |
| 793 | sci_handle_breaks(port); |
| 794 | sci_out(port, SCxSR, SCxSR_BREAK_CLEAR(port)); |
| 795 | |
| 796 | return IRQ_HANDLED; |
| 797 | } |
| 798 | |
David Howells | 7d12e78 | 2006-10-05 14:55:46 +0100 | [diff] [blame] | 799 | static irqreturn_t sci_mpxed_interrupt(int irq, void *ptr) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 800 | { |
| 801 | unsigned short ssr_status, scr_status; |
| 802 | struct uart_port *port = ptr; |
| 803 | |
| 804 | ssr_status = sci_in(port,SCxSR); |
| 805 | scr_status = sci_in(port,SCSCR); |
| 806 | |
| 807 | /* Tx Interrupt */ |
Paul Mundt | e108b2c | 2006-09-27 16:32:13 +0900 | [diff] [blame] | 808 | if ((ssr_status & 0x0020) && (scr_status & 0x0080)) |
David Howells | 7d12e78 | 2006-10-05 14:55:46 +0100 | [diff] [blame] | 809 | sci_tx_interrupt(irq, ptr); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 810 | /* Rx Interrupt */ |
Paul Mundt | e108b2c | 2006-09-27 16:32:13 +0900 | [diff] [blame] | 811 | if ((ssr_status & 0x0002) && (scr_status & 0x0040)) |
David Howells | 7d12e78 | 2006-10-05 14:55:46 +0100 | [diff] [blame] | 812 | sci_rx_interrupt(irq, ptr); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 813 | /* Error Interrupt */ |
Paul Mundt | e108b2c | 2006-09-27 16:32:13 +0900 | [diff] [blame] | 814 | if ((ssr_status & 0x0080) && (scr_status & 0x0400)) |
David Howells | 7d12e78 | 2006-10-05 14:55:46 +0100 | [diff] [blame] | 815 | sci_er_interrupt(irq, ptr); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 816 | /* Break Interrupt */ |
Paul Mundt | e108b2c | 2006-09-27 16:32:13 +0900 | [diff] [blame] | 817 | if ((ssr_status & 0x0010) && (scr_status & 0x0200)) |
David Howells | 7d12e78 | 2006-10-05 14:55:46 +0100 | [diff] [blame] | 818 | sci_br_interrupt(irq, ptr); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 819 | |
| 820 | return IRQ_HANDLED; |
| 821 | } |
| 822 | |
| 823 | #ifdef CONFIG_CPU_FREQ |
| 824 | /* |
| 825 | * Here we define a transistion notifier so that we can update all of our |
| 826 | * ports' baud rate when the peripheral clock changes. |
| 827 | */ |
Paul Mundt | e108b2c | 2006-09-27 16:32:13 +0900 | [diff] [blame] | 828 | static int sci_notifier(struct notifier_block *self, |
| 829 | unsigned long phase, void *p) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 830 | { |
| 831 | struct cpufreq_freqs *freqs = p; |
| 832 | int i; |
| 833 | |
| 834 | if ((phase == CPUFREQ_POSTCHANGE) || |
| 835 | (phase == CPUFREQ_RESUMECHANGE)){ |
| 836 | for (i = 0; i < SCI_NPORTS; i++) { |
| 837 | struct uart_port *port = &sci_ports[i].port; |
Paul Mundt | b7a76e4 | 2006-02-01 03:06:06 -0800 | [diff] [blame] | 838 | struct clk *clk; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 839 | |
| 840 | /* |
| 841 | * Update the uartclk per-port if frequency has |
| 842 | * changed, since it will no longer necessarily be |
| 843 | * consistent with the old frequency. |
| 844 | * |
| 845 | * Really we want to be able to do something like |
| 846 | * uart_change_speed() or something along those lines |
| 847 | * here to implicitly reset the per-port baud rate.. |
| 848 | * |
| 849 | * Clean this up later.. |
| 850 | */ |
Paul Mundt | 1d11856 | 2006-12-01 13:15:14 +0900 | [diff] [blame] | 851 | clk = clk_get(NULL, "module_clk"); |
Paul Mundt | b7a76e4 | 2006-02-01 03:06:06 -0800 | [diff] [blame] | 852 | port->uartclk = clk_get_rate(clk) * 16; |
| 853 | clk_put(clk); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 854 | } |
| 855 | |
Paul Mundt | e108b2c | 2006-09-27 16:32:13 +0900 | [diff] [blame] | 856 | printk(KERN_INFO "%s: got a postchange notification " |
| 857 | "for cpu %d (old %d, new %d)\n", |
Harvey Harrison | 71cc2c2 | 2008-04-30 00:55:10 -0700 | [diff] [blame] | 858 | __func__, freqs->cpu, freqs->old, freqs->new); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 859 | } |
| 860 | |
| 861 | return NOTIFY_OK; |
| 862 | } |
| 863 | |
| 864 | static struct notifier_block sci_nb = { &sci_notifier, NULL, 0 }; |
| 865 | #endif /* CONFIG_CPU_FREQ */ |
| 866 | |
| 867 | static int sci_request_irq(struct sci_port *port) |
| 868 | { |
| 869 | int i; |
David Howells | 7d12e78 | 2006-10-05 14:55:46 +0100 | [diff] [blame] | 870 | irqreturn_t (*handlers[4])(int irq, void *ptr) = { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 871 | sci_er_interrupt, sci_rx_interrupt, sci_tx_interrupt, |
| 872 | sci_br_interrupt, |
| 873 | }; |
| 874 | const char *desc[] = { "SCI Receive Error", "SCI Receive Data Full", |
| 875 | "SCI Transmit Data Empty", "SCI Break" }; |
| 876 | |
| 877 | if (port->irqs[0] == port->irqs[1]) { |
| 878 | if (!port->irqs[0]) { |
| 879 | printk(KERN_ERR "sci: Cannot allocate irq.(IRQ=0)\n"); |
| 880 | return -ENODEV; |
| 881 | } |
Paul Mundt | e108b2c | 2006-09-27 16:32:13 +0900 | [diff] [blame] | 882 | |
| 883 | if (request_irq(port->irqs[0], sci_mpxed_interrupt, |
Paul Mundt | 35f3c51 | 2006-10-06 15:31:16 +0900 | [diff] [blame] | 884 | IRQF_DISABLED, "sci", port)) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 885 | printk(KERN_ERR "sci: Cannot allocate irq.\n"); |
| 886 | return -ENODEV; |
| 887 | } |
| 888 | } else { |
| 889 | for (i = 0; i < ARRAY_SIZE(handlers); i++) { |
| 890 | if (!port->irqs[i]) |
| 891 | continue; |
Paul Mundt | e108b2c | 2006-09-27 16:32:13 +0900 | [diff] [blame] | 892 | if (request_irq(port->irqs[i], handlers[i], |
Paul Mundt | 35f3c51 | 2006-10-06 15:31:16 +0900 | [diff] [blame] | 893 | IRQF_DISABLED, desc[i], port)) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 894 | printk(KERN_ERR "sci: Cannot allocate irq.\n"); |
| 895 | return -ENODEV; |
| 896 | } |
| 897 | } |
| 898 | } |
| 899 | |
| 900 | return 0; |
| 901 | } |
| 902 | |
| 903 | static void sci_free_irq(struct sci_port *port) |
| 904 | { |
| 905 | int i; |
| 906 | |
| 907 | if (port->irqs[0] == port->irqs[1]) { |
| 908 | if (!port->irqs[0]) |
| 909 | printk("sci: sci_free_irq error\n"); |
| 910 | else |
| 911 | free_irq(port->irqs[0], port); |
| 912 | } else { |
| 913 | for (i = 0; i < ARRAY_SIZE(port->irqs); i++) { |
| 914 | if (!port->irqs[i]) |
| 915 | continue; |
| 916 | |
| 917 | free_irq(port->irqs[i], port); |
| 918 | } |
| 919 | } |
| 920 | } |
| 921 | |
| 922 | static unsigned int sci_tx_empty(struct uart_port *port) |
| 923 | { |
| 924 | /* Can't detect */ |
| 925 | return TIOCSER_TEMT; |
| 926 | } |
| 927 | |
| 928 | static void sci_set_mctrl(struct uart_port *port, unsigned int mctrl) |
| 929 | { |
| 930 | /* This routine is used for seting signals of: DTR, DCD, CTS/RTS */ |
| 931 | /* We use SCIF's hardware for CTS/RTS, so don't need any for that. */ |
| 932 | /* If you have signals for DTR and DCD, please implement here. */ |
| 933 | } |
| 934 | |
| 935 | static unsigned int sci_get_mctrl(struct uart_port *port) |
| 936 | { |
| 937 | /* This routine is used for geting signals of: DTR, DCD, DSR, RI, |
| 938 | and CTS/RTS */ |
| 939 | |
| 940 | return TIOCM_DTR | TIOCM_RTS | TIOCM_DSR; |
| 941 | } |
| 942 | |
Russell King | b129a8c | 2005-08-31 10:12:14 +0100 | [diff] [blame] | 943 | static void sci_start_tx(struct uart_port *port) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 944 | { |
Paul Mundt | e108b2c | 2006-09-27 16:32:13 +0900 | [diff] [blame] | 945 | unsigned short ctrl; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 946 | |
Paul Mundt | e108b2c | 2006-09-27 16:32:13 +0900 | [diff] [blame] | 947 | /* Set TIE (Transmit Interrupt Enable) bit in SCSCR */ |
| 948 | ctrl = sci_in(port, SCSCR); |
| 949 | ctrl |= SCI_CTRL_FLAGS_TIE; |
| 950 | sci_out(port, SCSCR, ctrl); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 951 | } |
| 952 | |
Russell King | b129a8c | 2005-08-31 10:12:14 +0100 | [diff] [blame] | 953 | static void sci_stop_tx(struct uart_port *port) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 954 | { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 955 | unsigned short ctrl; |
| 956 | |
| 957 | /* Clear TIE (Transmit Interrupt Enable) bit in SCSCR */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 958 | ctrl = sci_in(port, SCSCR); |
| 959 | ctrl &= ~SCI_CTRL_FLAGS_TIE; |
| 960 | sci_out(port, SCSCR, ctrl); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 961 | } |
| 962 | |
| 963 | static void sci_start_rx(struct uart_port *port, unsigned int tty_start) |
| 964 | { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 965 | unsigned short ctrl; |
| 966 | |
| 967 | /* Set RIE (Receive Interrupt Enable) bit in SCSCR */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 968 | ctrl = sci_in(port, SCSCR); |
| 969 | ctrl |= SCI_CTRL_FLAGS_RIE | SCI_CTRL_FLAGS_REIE; |
| 970 | sci_out(port, SCSCR, ctrl); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 971 | } |
| 972 | |
| 973 | static void sci_stop_rx(struct uart_port *port) |
| 974 | { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 975 | unsigned short ctrl; |
| 976 | |
| 977 | /* Clear RIE (Receive Interrupt Enable) bit in SCSCR */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 978 | ctrl = sci_in(port, SCSCR); |
| 979 | ctrl &= ~(SCI_CTRL_FLAGS_RIE | SCI_CTRL_FLAGS_REIE); |
| 980 | sci_out(port, SCSCR, ctrl); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 981 | } |
| 982 | |
| 983 | static void sci_enable_ms(struct uart_port *port) |
| 984 | { |
| 985 | /* Nothing here yet .. */ |
| 986 | } |
| 987 | |
| 988 | static void sci_break_ctl(struct uart_port *port, int break_state) |
| 989 | { |
| 990 | /* Nothing here yet .. */ |
| 991 | } |
| 992 | |
| 993 | static int sci_startup(struct uart_port *port) |
| 994 | { |
| 995 | struct sci_port *s = &sci_ports[port->line]; |
| 996 | |
Paul Mundt | e108b2c | 2006-09-27 16:32:13 +0900 | [diff] [blame] | 997 | if (s->enable) |
| 998 | s->enable(port); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 999 | |
Paul Mundt | 005a336 | 2007-04-26 11:45:32 +0900 | [diff] [blame] | 1000 | #if defined(CONFIG_SUPERH) && !defined(CONFIG_SUPERH64) |
dmitry pervushin | 1534a3b | 2007-04-24 13:41:12 +0900 | [diff] [blame] | 1001 | s->clk = clk_get(NULL, "module_clk"); |
Paul Mundt | 005a336 | 2007-04-26 11:45:32 +0900 | [diff] [blame] | 1002 | #endif |
dmitry pervushin | 1534a3b | 2007-04-24 13:41:12 +0900 | [diff] [blame] | 1003 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1004 | sci_request_irq(s); |
Yoshinori Sato | d656901 | 2005-10-14 15:59:12 -0700 | [diff] [blame] | 1005 | sci_start_tx(port); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1006 | sci_start_rx(port, 1); |
| 1007 | |
| 1008 | return 0; |
| 1009 | } |
| 1010 | |
| 1011 | static void sci_shutdown(struct uart_port *port) |
| 1012 | { |
| 1013 | struct sci_port *s = &sci_ports[port->line]; |
| 1014 | |
| 1015 | sci_stop_rx(port); |
Russell King | b129a8c | 2005-08-31 10:12:14 +0100 | [diff] [blame] | 1016 | sci_stop_tx(port); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1017 | sci_free_irq(s); |
| 1018 | |
Paul Mundt | e108b2c | 2006-09-27 16:32:13 +0900 | [diff] [blame] | 1019 | if (s->disable) |
| 1020 | s->disable(port); |
dmitry pervushin | 1534a3b | 2007-04-24 13:41:12 +0900 | [diff] [blame] | 1021 | |
Paul Mundt | 005a336 | 2007-04-26 11:45:32 +0900 | [diff] [blame] | 1022 | #if defined(CONFIG_SUPERH) && !defined(CONFIG_SUPERH64) |
dmitry pervushin | 1534a3b | 2007-04-24 13:41:12 +0900 | [diff] [blame] | 1023 | clk_put(s->clk); |
| 1024 | s->clk = NULL; |
Paul Mundt | 005a336 | 2007-04-26 11:45:32 +0900 | [diff] [blame] | 1025 | #endif |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1026 | } |
| 1027 | |
Alan Cox | 606d099 | 2006-12-08 02:38:45 -0800 | [diff] [blame] | 1028 | static void sci_set_termios(struct uart_port *port, struct ktermios *termios, |
| 1029 | struct ktermios *old) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1030 | { |
| 1031 | struct sci_port *s = &sci_ports[port->line]; |
| 1032 | unsigned int status, baud, smr_val; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1033 | int t; |
| 1034 | |
| 1035 | baud = uart_get_baud_rate(port, termios, old, 0, port->uartclk/16); |
| 1036 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1037 | switch (baud) { |
Paul Mundt | b7a76e4 | 2006-02-01 03:06:06 -0800 | [diff] [blame] | 1038 | case 0: |
| 1039 | t = -1; |
| 1040 | break; |
| 1041 | default: |
| 1042 | { |
| 1043 | #if defined(CONFIG_SUPERH) && !defined(CONFIG_SUPERH64) |
dmitry pervushin | 1534a3b | 2007-04-24 13:41:12 +0900 | [diff] [blame] | 1044 | t = SCBRR_VALUE(baud, clk_get_rate(s->clk)); |
Paul Mundt | b7a76e4 | 2006-02-01 03:06:06 -0800 | [diff] [blame] | 1045 | #else |
| 1046 | t = SCBRR_VALUE(baud); |
| 1047 | #endif |
Paul Mundt | b7a76e4 | 2006-02-01 03:06:06 -0800 | [diff] [blame] | 1048 | break; |
Paul Mundt | fa5da2f | 2007-03-08 17:27:37 +0900 | [diff] [blame] | 1049 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1050 | } |
| 1051 | |
Paul Mundt | e108b2c | 2006-09-27 16:32:13 +0900 | [diff] [blame] | 1052 | do { |
| 1053 | status = sci_in(port, SCxSR); |
| 1054 | } while (!(status & SCxSR_TEND(port))); |
| 1055 | |
| 1056 | sci_out(port, SCSCR, 0x00); /* TE=0, RE=0, CKE1=0 */ |
| 1057 | |
| 1058 | #if !defined(SCI_ONLY) |
| 1059 | if (port->type == PORT_SCIF) |
| 1060 | sci_out(port, SCFCR, SCFCR_RFRST | SCFCR_TFRST); |
| 1061 | #endif |
| 1062 | |
| 1063 | smr_val = sci_in(port, SCSMR) & 3; |
| 1064 | if ((termios->c_cflag & CSIZE) == CS7) |
| 1065 | smr_val |= 0x40; |
| 1066 | if (termios->c_cflag & PARENB) |
| 1067 | smr_val |= 0x20; |
| 1068 | if (termios->c_cflag & PARODD) |
| 1069 | smr_val |= 0x30; |
| 1070 | if (termios->c_cflag & CSTOPB) |
| 1071 | smr_val |= 0x08; |
| 1072 | |
| 1073 | uart_update_timeout(port, termios->c_cflag, baud); |
| 1074 | |
| 1075 | sci_out(port, SCSMR, smr_val); |
| 1076 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1077 | if (t > 0) { |
| 1078 | if(t >= 256) { |
| 1079 | sci_out(port, SCSMR, (sci_in(port, SCSMR) & ~3) | 1); |
| 1080 | t >>= 2; |
| 1081 | } else { |
| 1082 | sci_out(port, SCSMR, sci_in(port, SCSMR) & ~3); |
| 1083 | } |
| 1084 | sci_out(port, SCBRR, t); |
| 1085 | udelay((1000000+(baud-1)) / baud); /* Wait one bit interval */ |
| 1086 | } |
| 1087 | |
Paul Mundt | b7a76e4 | 2006-02-01 03:06:06 -0800 | [diff] [blame] | 1088 | if (likely(s->init_pins)) |
| 1089 | s->init_pins(port, termios->c_cflag); |
| 1090 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1091 | sci_out(port, SCSCR, SCSCR_INIT(port)); |
| 1092 | |
| 1093 | if ((termios->c_cflag & CREAD) != 0) |
| 1094 | sci_start_rx(port,0); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1095 | } |
| 1096 | |
| 1097 | static const char *sci_type(struct uart_port *port) |
| 1098 | { |
| 1099 | switch (port->type) { |
| 1100 | case PORT_SCI: return "sci"; |
| 1101 | case PORT_SCIF: return "scif"; |
| 1102 | case PORT_IRDA: return "irda"; |
| 1103 | } |
| 1104 | |
| 1105 | return 0; |
| 1106 | } |
| 1107 | |
| 1108 | static void sci_release_port(struct uart_port *port) |
| 1109 | { |
| 1110 | /* Nothing here yet .. */ |
| 1111 | } |
| 1112 | |
| 1113 | static int sci_request_port(struct uart_port *port) |
| 1114 | { |
| 1115 | /* Nothing here yet .. */ |
| 1116 | return 0; |
| 1117 | } |
| 1118 | |
| 1119 | static void sci_config_port(struct uart_port *port, int flags) |
| 1120 | { |
| 1121 | struct sci_port *s = &sci_ports[port->line]; |
| 1122 | |
| 1123 | port->type = s->type; |
| 1124 | |
Paul Mundt | e108b2c | 2006-09-27 16:32:13 +0900 | [diff] [blame] | 1125 | switch (port->type) { |
| 1126 | case PORT_SCI: |
| 1127 | s->init_pins = sci_init_pins_sci; |
| 1128 | break; |
| 1129 | case PORT_SCIF: |
| 1130 | s->init_pins = sci_init_pins_scif; |
| 1131 | break; |
| 1132 | case PORT_IRDA: |
| 1133 | s->init_pins = sci_init_pins_irda; |
| 1134 | break; |
| 1135 | } |
| 1136 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1137 | #if defined(CONFIG_CPU_SUBTYPE_SH5_101) || defined(CONFIG_CPU_SUBTYPE_SH5_103) |
| 1138 | if (port->mapbase == 0) |
| 1139 | port->mapbase = onchip_remap(SCIF_ADDR_SH5, 1024, "SCIF"); |
| 1140 | |
Paul Mundt | e108b2c | 2006-09-27 16:32:13 +0900 | [diff] [blame] | 1141 | port->membase = (void __iomem *)port->mapbase; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1142 | #endif |
| 1143 | } |
| 1144 | |
| 1145 | static int sci_verify_port(struct uart_port *port, struct serial_struct *ser) |
| 1146 | { |
| 1147 | struct sci_port *s = &sci_ports[port->line]; |
| 1148 | |
| 1149 | if (ser->irq != s->irqs[SCIx_TXI_IRQ] || ser->irq > NR_IRQS) |
| 1150 | return -EINVAL; |
| 1151 | if (ser->baud_base < 2400) |
| 1152 | /* No paper tape reader for Mitch.. */ |
| 1153 | return -EINVAL; |
| 1154 | |
| 1155 | return 0; |
| 1156 | } |
| 1157 | |
| 1158 | static struct uart_ops sci_uart_ops = { |
| 1159 | .tx_empty = sci_tx_empty, |
| 1160 | .set_mctrl = sci_set_mctrl, |
| 1161 | .get_mctrl = sci_get_mctrl, |
| 1162 | .start_tx = sci_start_tx, |
| 1163 | .stop_tx = sci_stop_tx, |
| 1164 | .stop_rx = sci_stop_rx, |
| 1165 | .enable_ms = sci_enable_ms, |
| 1166 | .break_ctl = sci_break_ctl, |
| 1167 | .startup = sci_startup, |
| 1168 | .shutdown = sci_shutdown, |
| 1169 | .set_termios = sci_set_termios, |
| 1170 | .type = sci_type, |
| 1171 | .release_port = sci_release_port, |
| 1172 | .request_port = sci_request_port, |
| 1173 | .config_port = sci_config_port, |
| 1174 | .verify_port = sci_verify_port, |
| 1175 | }; |
| 1176 | |
Paul Mundt | e108b2c | 2006-09-27 16:32:13 +0900 | [diff] [blame] | 1177 | static void __init sci_init_ports(void) |
| 1178 | { |
| 1179 | static int first = 1; |
| 1180 | int i; |
| 1181 | |
| 1182 | if (!first) |
| 1183 | return; |
| 1184 | |
| 1185 | first = 0; |
| 1186 | |
| 1187 | for (i = 0; i < SCI_NPORTS; i++) { |
| 1188 | sci_ports[i].port.ops = &sci_uart_ops; |
| 1189 | sci_ports[i].port.iotype = UPIO_MEM; |
| 1190 | sci_ports[i].port.line = i; |
| 1191 | sci_ports[i].port.fifosize = 1; |
| 1192 | |
| 1193 | #if defined(__H8300H__) || defined(__H8300S__) |
| 1194 | #ifdef __H8300S__ |
| 1195 | sci_ports[i].enable = h8300_sci_enable; |
| 1196 | sci_ports[i].disable = h8300_sci_disable; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1197 | #endif |
Paul Mundt | e108b2c | 2006-09-27 16:32:13 +0900 | [diff] [blame] | 1198 | sci_ports[i].port.uartclk = CONFIG_CPU_CLOCK; |
| 1199 | #elif defined(CONFIG_SUPERH64) |
| 1200 | sci_ports[i].port.uartclk = current_cpu_data.module_clock * 16; |
| 1201 | #else |
| 1202 | /* |
| 1203 | * XXX: We should use a proper SCI/SCIF clock |
| 1204 | */ |
| 1205 | { |
Paul Mundt | 1d11856 | 2006-12-01 13:15:14 +0900 | [diff] [blame] | 1206 | struct clk *clk = clk_get(NULL, "module_clk"); |
Paul Mundt | e108b2c | 2006-09-27 16:32:13 +0900 | [diff] [blame] | 1207 | sci_ports[i].port.uartclk = clk_get_rate(clk) * 16; |
| 1208 | clk_put(clk); |
| 1209 | } |
| 1210 | #endif |
| 1211 | |
| 1212 | sci_ports[i].break_timer.data = (unsigned long)&sci_ports[i]; |
| 1213 | sci_ports[i].break_timer.function = sci_break_timer; |
| 1214 | |
| 1215 | init_timer(&sci_ports[i].break_timer); |
| 1216 | } |
| 1217 | } |
| 1218 | |
| 1219 | int __init early_sci_setup(struct uart_port *port) |
| 1220 | { |
| 1221 | if (unlikely(port->line > SCI_NPORTS)) |
| 1222 | return -ENODEV; |
| 1223 | |
| 1224 | sci_init_ports(); |
| 1225 | |
| 1226 | sci_ports[port->line].port.membase = port->membase; |
| 1227 | sci_ports[port->line].port.mapbase = port->mapbase; |
| 1228 | sci_ports[port->line].port.type = port->type; |
| 1229 | |
| 1230 | return 0; |
| 1231 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1232 | |
| 1233 | #ifdef CONFIG_SERIAL_SH_SCI_CONSOLE |
| 1234 | /* |
| 1235 | * Print a string to the serial port trying not to disturb |
| 1236 | * any possible real use of the port... |
| 1237 | */ |
| 1238 | static void serial_console_write(struct console *co, const char *s, |
| 1239 | unsigned count) |
| 1240 | { |
| 1241 | put_string(serial_console_port, s, count); |
| 1242 | } |
| 1243 | |
| 1244 | static int __init serial_console_setup(struct console *co, char *options) |
| 1245 | { |
| 1246 | struct uart_port *port; |
| 1247 | int baud = 115200; |
| 1248 | int bits = 8; |
| 1249 | int parity = 'n'; |
| 1250 | int flow = 'n'; |
| 1251 | int ret; |
| 1252 | |
Paul Mundt | e108b2c | 2006-09-27 16:32:13 +0900 | [diff] [blame] | 1253 | /* |
| 1254 | * Check whether an invalid uart number has been specified, and |
| 1255 | * if so, search for the first available port that does have |
| 1256 | * console support. |
| 1257 | */ |
| 1258 | if (co->index >= SCI_NPORTS) |
| 1259 | co->index = 0; |
| 1260 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1261 | serial_console_port = &sci_ports[co->index]; |
| 1262 | port = &serial_console_port->port; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1263 | |
| 1264 | /* |
Paul Mundt | e108b2c | 2006-09-27 16:32:13 +0900 | [diff] [blame] | 1265 | * Also need to check port->type, we don't actually have any |
| 1266 | * UPIO_PORT ports, but uart_report_port() handily misreports |
| 1267 | * it anyways if we don't have a port available by the time this is |
| 1268 | * called. |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1269 | */ |
Paul Mundt | e108b2c | 2006-09-27 16:32:13 +0900 | [diff] [blame] | 1270 | if (!port->type) |
| 1271 | return -ENODEV; |
| 1272 | if (!port->membase || !port->mapbase) |
| 1273 | return -ENODEV; |
Paul Mundt | b7a76e4 | 2006-02-01 03:06:06 -0800 | [diff] [blame] | 1274 | |
Paul Mundt | e108b2c | 2006-09-27 16:32:13 +0900 | [diff] [blame] | 1275 | port->type = serial_console_port->type; |
| 1276 | |
Paul Mundt | 005a336 | 2007-04-26 11:45:32 +0900 | [diff] [blame] | 1277 | #if defined(CONFIG_SUPERH) && !defined(CONFIG_SUPERH64) |
| 1278 | if (!serial_console_port->clk) |
| 1279 | serial_console_port->clk = clk_get(NULL, "module_clk"); |
| 1280 | #endif |
| 1281 | |
Paul Mundt | e108b2c | 2006-09-27 16:32:13 +0900 | [diff] [blame] | 1282 | if (port->flags & UPF_IOREMAP) |
| 1283 | sci_config_port(port, 0); |
| 1284 | |
| 1285 | if (serial_console_port->enable) |
| 1286 | serial_console_port->enable(port); |
| 1287 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1288 | if (options) |
| 1289 | uart_parse_options(options, &baud, &parity, &bits, &flow); |
| 1290 | |
| 1291 | ret = uart_set_options(port, co, baud, parity, bits, flow); |
| 1292 | #if defined(__H8300H__) || defined(__H8300S__) |
| 1293 | /* disable rx interrupt */ |
| 1294 | if (ret == 0) |
| 1295 | sci_stop_rx(port); |
| 1296 | #endif |
| 1297 | return ret; |
| 1298 | } |
| 1299 | |
| 1300 | static struct console serial_console = { |
| 1301 | .name = "ttySC", |
| 1302 | .device = uart_console_device, |
| 1303 | .write = serial_console_write, |
| 1304 | .setup = serial_console_setup, |
Paul Mundt | fa5da2f | 2007-03-08 17:27:37 +0900 | [diff] [blame] | 1305 | .flags = CON_PRINTBUFFER, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1306 | .index = -1, |
| 1307 | .data = &sci_uart_driver, |
| 1308 | }; |
| 1309 | |
| 1310 | static int __init sci_console_init(void) |
| 1311 | { |
Paul Mundt | e108b2c | 2006-09-27 16:32:13 +0900 | [diff] [blame] | 1312 | sci_init_ports(); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1313 | register_console(&serial_console); |
| 1314 | return 0; |
| 1315 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1316 | console_initcall(sci_console_init); |
| 1317 | #endif /* CONFIG_SERIAL_SH_SCI_CONSOLE */ |
| 1318 | |
Paul Mundt | 68362e0 | 2007-09-11 15:27:29 +0900 | [diff] [blame] | 1319 | #ifdef CONFIG_SH_KGDB_CONSOLE |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1320 | /* |
| 1321 | * FIXME: Most of this can go away.. at the moment, we rely on |
| 1322 | * arch/sh/kernel/setup.c to do the command line parsing for kgdb, though |
| 1323 | * most of that can easily be done here instead. |
| 1324 | * |
| 1325 | * For the time being, just accept the values that were parsed earlier.. |
| 1326 | */ |
| 1327 | static void __init kgdb_console_get_options(struct uart_port *port, int *baud, |
| 1328 | int *parity, int *bits) |
| 1329 | { |
| 1330 | *baud = kgdb_baud; |
| 1331 | *parity = tolower(kgdb_parity); |
| 1332 | *bits = kgdb_bits - '0'; |
| 1333 | } |
| 1334 | |
| 1335 | /* |
| 1336 | * The naming here is somewhat misleading, since kgdb_console_setup() takes |
| 1337 | * care of the early-on initialization for kgdb, regardless of whether we |
| 1338 | * actually use kgdb as a console or not. |
| 1339 | * |
| 1340 | * On the plus side, this lets us kill off the old kgdb_sci_setup() nonsense. |
| 1341 | */ |
| 1342 | int __init kgdb_console_setup(struct console *co, char *options) |
| 1343 | { |
| 1344 | struct uart_port *port = &sci_ports[kgdb_portnum].port; |
| 1345 | int baud = 38400; |
| 1346 | int bits = 8; |
| 1347 | int parity = 'n'; |
| 1348 | int flow = 'n'; |
| 1349 | |
Paul Mundt | b7a76e4 | 2006-02-01 03:06:06 -0800 | [diff] [blame] | 1350 | if (co->index != kgdb_portnum) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1351 | co->index = kgdb_portnum; |
| 1352 | |
Paul Mundt | fa5da2f | 2007-03-08 17:27:37 +0900 | [diff] [blame] | 1353 | kgdb_sci_port = &sci_ports[co->index]; |
| 1354 | port = &kgdb_sci_port->port; |
| 1355 | |
| 1356 | /* |
| 1357 | * Also need to check port->type, we don't actually have any |
| 1358 | * UPIO_PORT ports, but uart_report_port() handily misreports |
| 1359 | * it anyways if we don't have a port available by the time this is |
| 1360 | * called. |
| 1361 | */ |
| 1362 | if (!port->type) |
| 1363 | return -ENODEV; |
| 1364 | if (!port->membase || !port->mapbase) |
| 1365 | return -ENODEV; |
| 1366 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1367 | if (options) |
| 1368 | uart_parse_options(options, &baud, &parity, &bits, &flow); |
| 1369 | else |
| 1370 | kgdb_console_get_options(port, &baud, &parity, &bits); |
| 1371 | |
| 1372 | kgdb_getchar = kgdb_sci_getchar; |
| 1373 | kgdb_putchar = kgdb_sci_putchar; |
| 1374 | |
| 1375 | return uart_set_options(port, co, baud, parity, bits, flow); |
| 1376 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1377 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1378 | static struct console kgdb_console = { |
Paul Mundt | fa5da2f | 2007-03-08 17:27:37 +0900 | [diff] [blame] | 1379 | .name = "ttySC", |
| 1380 | .device = uart_console_device, |
| 1381 | .write = kgdb_console_write, |
| 1382 | .setup = kgdb_console_setup, |
| 1383 | .flags = CON_PRINTBUFFER, |
| 1384 | .index = -1, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1385 | .data = &sci_uart_driver, |
| 1386 | }; |
| 1387 | |
| 1388 | /* Register the KGDB console so we get messages (d'oh!) */ |
| 1389 | static int __init kgdb_console_init(void) |
| 1390 | { |
Paul Mundt | e108b2c | 2006-09-27 16:32:13 +0900 | [diff] [blame] | 1391 | sci_init_ports(); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1392 | register_console(&kgdb_console); |
| 1393 | return 0; |
| 1394 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1395 | console_initcall(kgdb_console_init); |
| 1396 | #endif /* CONFIG_SH_KGDB_CONSOLE */ |
| 1397 | |
| 1398 | #if defined(CONFIG_SH_KGDB_CONSOLE) |
| 1399 | #define SCI_CONSOLE &kgdb_console |
| 1400 | #elif defined(CONFIG_SERIAL_SH_SCI_CONSOLE) |
| 1401 | #define SCI_CONSOLE &serial_console |
| 1402 | #else |
Paul Mundt | b7a76e4 | 2006-02-01 03:06:06 -0800 | [diff] [blame] | 1403 | #define SCI_CONSOLE 0 |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1404 | #endif |
| 1405 | |
| 1406 | static char banner[] __initdata = |
| 1407 | KERN_INFO "SuperH SCI(F) driver initialized\n"; |
| 1408 | |
| 1409 | static struct uart_driver sci_uart_driver = { |
| 1410 | .owner = THIS_MODULE, |
| 1411 | .driver_name = "sci", |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1412 | .dev_name = "ttySC", |
| 1413 | .major = SCI_MAJOR, |
| 1414 | .minor = SCI_MINOR_START, |
Paul Mundt | e108b2c | 2006-09-27 16:32:13 +0900 | [diff] [blame] | 1415 | .nr = SCI_NPORTS, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1416 | .cons = SCI_CONSOLE, |
| 1417 | }; |
| 1418 | |
Paul Mundt | e108b2c | 2006-09-27 16:32:13 +0900 | [diff] [blame] | 1419 | /* |
| 1420 | * Register a set of serial devices attached to a platform device. The |
| 1421 | * list is terminated with a zero flags entry, which means we expect |
| 1422 | * all entries to have at least UPF_BOOT_AUTOCONF set. Platforms that need |
| 1423 | * remapping (such as sh64) should also set UPF_IOREMAP. |
| 1424 | */ |
| 1425 | static int __devinit sci_probe(struct platform_device *dev) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1426 | { |
Paul Mundt | e108b2c | 2006-09-27 16:32:13 +0900 | [diff] [blame] | 1427 | struct plat_sci_port *p = dev->dev.platform_data; |
| 1428 | int i; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1429 | |
Paul Mundt | 32351a2 | 2007-03-12 14:38:59 +0900 | [diff] [blame] | 1430 | for (i = 0; p && p->flags != 0; p++, i++) { |
Paul Mundt | e108b2c | 2006-09-27 16:32:13 +0900 | [diff] [blame] | 1431 | struct sci_port *sciport = &sci_ports[i]; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1432 | |
Paul Mundt | 32351a2 | 2007-03-12 14:38:59 +0900 | [diff] [blame] | 1433 | /* Sanity check */ |
| 1434 | if (unlikely(i == SCI_NPORTS)) { |
| 1435 | dev_notice(&dev->dev, "Attempting to register port " |
| 1436 | "%d when only %d are available.\n", |
| 1437 | i+1, SCI_NPORTS); |
| 1438 | dev_notice(&dev->dev, "Consider bumping " |
| 1439 | "CONFIG_SERIAL_SH_SCI_NR_UARTS!\n"); |
| 1440 | break; |
| 1441 | } |
| 1442 | |
Paul Mundt | e108b2c | 2006-09-27 16:32:13 +0900 | [diff] [blame] | 1443 | sciport->port.mapbase = p->mapbase; |
Paul Mundt | b7a76e4 | 2006-02-01 03:06:06 -0800 | [diff] [blame] | 1444 | |
Paul Mundt | e108b2c | 2006-09-27 16:32:13 +0900 | [diff] [blame] | 1445 | /* |
| 1446 | * For the simple (and majority of) cases where we don't need |
| 1447 | * to do any remapping, just cast the cookie directly. |
| 1448 | */ |
| 1449 | if (p->mapbase && !p->membase && !(p->flags & UPF_IOREMAP)) |
| 1450 | p->membase = (void __iomem *)p->mapbase; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1451 | |
Paul Mundt | e108b2c | 2006-09-27 16:32:13 +0900 | [diff] [blame] | 1452 | sciport->port.membase = p->membase; |
| 1453 | |
| 1454 | sciport->port.irq = p->irqs[SCIx_TXI_IRQ]; |
| 1455 | sciport->port.flags = p->flags; |
| 1456 | sciport->port.dev = &dev->dev; |
| 1457 | |
| 1458 | sciport->type = sciport->port.type = p->type; |
| 1459 | |
| 1460 | memcpy(&sciport->irqs, &p->irqs, sizeof(p->irqs)); |
| 1461 | |
| 1462 | uart_add_one_port(&sci_uart_driver, &sciport->port); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1463 | } |
| 1464 | |
Paul Mundt | fa5da2f | 2007-03-08 17:27:37 +0900 | [diff] [blame] | 1465 | #if defined(CONFIG_SH_KGDB) && !defined(CONFIG_SH_KGDB_CONSOLE) |
| 1466 | kgdb_sci_port = &sci_ports[kgdb_portnum]; |
| 1467 | kgdb_getchar = kgdb_sci_getchar; |
| 1468 | kgdb_putchar = kgdb_sci_putchar; |
| 1469 | #endif |
| 1470 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1471 | #ifdef CONFIG_CPU_FREQ |
| 1472 | cpufreq_register_notifier(&sci_nb, CPUFREQ_TRANSITION_NOTIFIER); |
Paul Mundt | e289fd9 | 2007-08-08 18:09:13 +0900 | [diff] [blame] | 1473 | dev_info(&dev->dev, "CPU frequency notifier registered\n"); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1474 | #endif |
| 1475 | |
| 1476 | #ifdef CONFIG_SH_STANDARD_BIOS |
| 1477 | sh_bios_gdb_detach(); |
| 1478 | #endif |
| 1479 | |
Paul Mundt | e108b2c | 2006-09-27 16:32:13 +0900 | [diff] [blame] | 1480 | return 0; |
| 1481 | } |
| 1482 | |
| 1483 | static int __devexit sci_remove(struct platform_device *dev) |
| 1484 | { |
| 1485 | int i; |
| 1486 | |
| 1487 | for (i = 0; i < SCI_NPORTS; i++) |
| 1488 | uart_remove_one_port(&sci_uart_driver, &sci_ports[i].port); |
| 1489 | |
| 1490 | return 0; |
| 1491 | } |
| 1492 | |
| 1493 | static int sci_suspend(struct platform_device *dev, pm_message_t state) |
| 1494 | { |
| 1495 | int i; |
| 1496 | |
| 1497 | for (i = 0; i < SCI_NPORTS; i++) { |
| 1498 | struct sci_port *p = &sci_ports[i]; |
| 1499 | |
| 1500 | if (p->type != PORT_UNKNOWN && p->port.dev == &dev->dev) |
| 1501 | uart_suspend_port(&sci_uart_driver, &p->port); |
| 1502 | } |
| 1503 | |
| 1504 | return 0; |
| 1505 | } |
| 1506 | |
| 1507 | static int sci_resume(struct platform_device *dev) |
| 1508 | { |
| 1509 | int i; |
| 1510 | |
| 1511 | for (i = 0; i < SCI_NPORTS; i++) { |
| 1512 | struct sci_port *p = &sci_ports[i]; |
| 1513 | |
| 1514 | if (p->type != PORT_UNKNOWN && p->port.dev == &dev->dev) |
| 1515 | uart_resume_port(&sci_uart_driver, &p->port); |
| 1516 | } |
| 1517 | |
| 1518 | return 0; |
| 1519 | } |
| 1520 | |
| 1521 | static struct platform_driver sci_driver = { |
| 1522 | .probe = sci_probe, |
| 1523 | .remove = __devexit_p(sci_remove), |
| 1524 | .suspend = sci_suspend, |
| 1525 | .resume = sci_resume, |
| 1526 | .driver = { |
| 1527 | .name = "sh-sci", |
| 1528 | .owner = THIS_MODULE, |
| 1529 | }, |
| 1530 | }; |
| 1531 | |
| 1532 | static int __init sci_init(void) |
| 1533 | { |
| 1534 | int ret; |
| 1535 | |
| 1536 | printk(banner); |
| 1537 | |
| 1538 | sci_init_ports(); |
| 1539 | |
| 1540 | ret = uart_register_driver(&sci_uart_driver); |
| 1541 | if (likely(ret == 0)) { |
| 1542 | ret = platform_driver_register(&sci_driver); |
| 1543 | if (unlikely(ret)) |
| 1544 | uart_unregister_driver(&sci_uart_driver); |
| 1545 | } |
| 1546 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1547 | return ret; |
| 1548 | } |
| 1549 | |
| 1550 | static void __exit sci_exit(void) |
| 1551 | { |
Paul Mundt | e108b2c | 2006-09-27 16:32:13 +0900 | [diff] [blame] | 1552 | platform_driver_unregister(&sci_driver); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1553 | uart_unregister_driver(&sci_uart_driver); |
| 1554 | } |
| 1555 | |
| 1556 | module_init(sci_init); |
| 1557 | module_exit(sci_exit); |
| 1558 | |
Paul Mundt | e108b2c | 2006-09-27 16:32:13 +0900 | [diff] [blame] | 1559 | MODULE_LICENSE("GPL"); |
Kay Sievers | e169c13 | 2008-04-15 14:34:35 -0700 | [diff] [blame] | 1560 | MODULE_ALIAS("platform:sh-sci"); |