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 | #include <linux/notifier.h> |
| 46 | #include <linux/cpufreq.h> |
Paul Mundt | 85f094e | 2008-04-25 16:04:20 +0900 | [diff] [blame] | 47 | #include <linux/clk.h> |
Paul Mundt | fa5da2f | 2007-03-08 17:27:37 +0900 | [diff] [blame] | 48 | #include <linux/ctype.h> |
Paul Mundt | 85f094e | 2008-04-25 16:04:20 +0900 | [diff] [blame] | 49 | |
| 50 | #ifdef CONFIG_SUPERH |
Paul Mundt | b7a76e4 | 2006-02-01 03:06:06 -0800 | [diff] [blame] | 51 | #include <asm/clock.h> |
Paul Mundt | e108b2c | 2006-09-27 16:32:13 +0900 | [diff] [blame] | 52 | #include <asm/sh_bios.h> |
| 53 | #include <asm/kgdb.h> |
Paul Mundt | b7a76e4 | 2006-02-01 03:06:06 -0800 | [diff] [blame] | 54 | #endif |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 55 | |
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; |
dmitry pervushin | 1534a3b | 2007-04-24 13:41:12 +0900 | [diff] [blame] | 80 | |
Paul Mundt | 85f094e | 2008-04-25 16:04:20 +0900 | [diff] [blame] | 81 | #ifdef CONFIG_SUPERH |
dmitry pervushin | 1534a3b | 2007-04-24 13:41:12 +0900 | [diff] [blame] | 82 | /* Port clock */ |
| 83 | struct clk *clk; |
Paul Mundt | 005a336 | 2007-04-26 11:45:32 +0900 | [diff] [blame] | 84 | #endif |
Paul Mundt | e108b2c | 2006-09-27 16:32:13 +0900 | [diff] [blame] | 85 | }; |
| 86 | |
| 87 | #ifdef CONFIG_SH_KGDB |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 88 | static struct sci_port *kgdb_sci_port; |
Paul Mundt | e108b2c | 2006-09-27 16:32:13 +0900 | [diff] [blame] | 89 | #endif |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 90 | |
| 91 | #ifdef CONFIG_SERIAL_SH_SCI_CONSOLE |
Paul Mundt | e108b2c | 2006-09-27 16:32:13 +0900 | [diff] [blame] | 92 | static struct sci_port *serial_console_port; |
| 93 | #endif |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 94 | |
| 95 | /* Function prototypes */ |
Russell King | b129a8c | 2005-08-31 10:12:14 +0100 | [diff] [blame] | 96 | static void sci_stop_tx(struct uart_port *port); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 97 | |
Paul Mundt | e108b2c | 2006-09-27 16:32:13 +0900 | [diff] [blame] | 98 | #define SCI_NPORTS CONFIG_SERIAL_SH_SCI_NR_UARTS |
| 99 | |
| 100 | static struct sci_port sci_ports[SCI_NPORTS]; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 101 | static struct uart_driver sci_uart_driver; |
| 102 | |
Paul Mundt | e108b2c | 2006-09-27 16:32:13 +0900 | [diff] [blame] | 103 | #if defined(CONFIG_SERIAL_SH_SCI_CONSOLE) && \ |
| 104 | defined(CONFIG_SH_STANDARD_BIOS) || defined(CONFIG_SH_KGDB) |
| 105 | static inline void handle_error(struct uart_port *port) |
| 106 | { |
| 107 | /* Clear error flags */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 108 | sci_out(port, SCxSR, SCxSR_ERROR_CLEAR(port)); |
| 109 | } |
| 110 | |
| 111 | static int get_char(struct uart_port *port) |
| 112 | { |
| 113 | unsigned long flags; |
| 114 | unsigned short status; |
| 115 | int c; |
| 116 | |
Paul Mundt | e108b2c | 2006-09-27 16:32:13 +0900 | [diff] [blame] | 117 | spin_lock_irqsave(&port->lock, flags); |
| 118 | do { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 119 | status = sci_in(port, SCxSR); |
| 120 | if (status & SCxSR_ERRORS(port)) { |
| 121 | handle_error(port); |
| 122 | continue; |
| 123 | } |
| 124 | } while (!(status & SCxSR_RDxF(port))); |
| 125 | c = sci_in(port, SCxRDR); |
| 126 | sci_in(port, SCxSR); /* Dummy read */ |
| 127 | sci_out(port, SCxSR, SCxSR_RDxF_CLEAR(port)); |
Paul Mundt | e108b2c | 2006-09-27 16:32:13 +0900 | [diff] [blame] | 128 | spin_unlock_irqrestore(&port->lock, flags); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 129 | |
| 130 | return c; |
| 131 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 132 | #endif /* CONFIG_SH_STANDARD_BIOS || CONFIG_SH_KGDB */ |
| 133 | |
Paul Mundt | e108b2c | 2006-09-27 16:32:13 +0900 | [diff] [blame] | 134 | #if defined(CONFIG_SERIAL_SH_SCI_CONSOLE) || defined(CONFIG_SH_KGDB) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 135 | static void put_char(struct uart_port *port, char c) |
| 136 | { |
| 137 | unsigned long flags; |
| 138 | unsigned short status; |
| 139 | |
Paul Mundt | e108b2c | 2006-09-27 16:32:13 +0900 | [diff] [blame] | 140 | spin_lock_irqsave(&port->lock, flags); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 141 | |
| 142 | do { |
| 143 | status = sci_in(port, SCxSR); |
| 144 | } while (!(status & SCxSR_TDxE(port))); |
| 145 | |
| 146 | sci_out(port, SCxTDR, c); |
| 147 | sci_in(port, SCxSR); /* Dummy read */ |
| 148 | sci_out(port, SCxSR, SCxSR_TDxE_CLEAR(port)); |
| 149 | |
Paul Mundt | e108b2c | 2006-09-27 16:32:13 +0900 | [diff] [blame] | 150 | spin_unlock_irqrestore(&port->lock, flags); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 151 | } |
Paul Mundt | e108b2c | 2006-09-27 16:32:13 +0900 | [diff] [blame] | 152 | #endif |
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 | #ifdef CONFIG_SERIAL_SH_SCI_CONSOLE |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 155 | static void put_string(struct sci_port *sci_port, const char *buffer, int count) |
| 156 | { |
| 157 | struct uart_port *port = &sci_port->port; |
| 158 | const unsigned char *p = buffer; |
| 159 | int i; |
| 160 | |
| 161 | #if defined(CONFIG_SH_STANDARD_BIOS) || defined(CONFIG_SH_KGDB) |
| 162 | int checksum; |
| 163 | int usegdb=0; |
| 164 | |
| 165 | #ifdef CONFIG_SH_STANDARD_BIOS |
Paul Mundt | b7a76e4 | 2006-02-01 03:06:06 -0800 | [diff] [blame] | 166 | /* This call only does a trap the first time it is |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 167 | * called, and so is safe to do here unconditionally |
| 168 | */ |
| 169 | usegdb |= sh_bios_in_gdb_mode(); |
| 170 | #endif |
| 171 | #ifdef CONFIG_SH_KGDB |
Paul Mundt | fa5da2f | 2007-03-08 17:27:37 +0900 | [diff] [blame] | 172 | usegdb |= (kgdb_in_gdb_mode && (sci_port == kgdb_sci_port)); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 173 | #endif |
| 174 | |
| 175 | if (usegdb) { |
| 176 | /* $<packet info>#<checksum>. */ |
| 177 | do { |
| 178 | unsigned char c; |
| 179 | put_char(port, '$'); |
| 180 | put_char(port, 'O'); /* 'O'utput to console */ |
| 181 | checksum = 'O'; |
| 182 | |
| 183 | for (i=0; i<count; i++) { /* Don't use run length encoding */ |
| 184 | int h, l; |
| 185 | |
| 186 | c = *p++; |
Harvey Harrison | bfd3c7a | 2008-05-12 12:05:43 -0700 | [diff] [blame] | 187 | h = hex_asc_hi(c); |
| 188 | l = hex_asc_lo(c); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 189 | put_char(port, h); |
| 190 | put_char(port, l); |
| 191 | checksum += h + l; |
| 192 | } |
| 193 | put_char(port, '#'); |
Harvey Harrison | bfd3c7a | 2008-05-12 12:05:43 -0700 | [diff] [blame] | 194 | put_char(port, hex_asc_hi(checksum)); |
| 195 | put_char(port, hex_asc_lo(checksum)); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 196 | } while (get_char(port) != '+'); |
| 197 | } else |
| 198 | #endif /* CONFIG_SH_STANDARD_BIOS || CONFIG_SH_KGDB */ |
| 199 | for (i=0; i<count; i++) { |
| 200 | if (*p == 10) |
| 201 | put_char(port, '\r'); |
| 202 | put_char(port, *p++); |
| 203 | } |
| 204 | } |
| 205 | #endif /* CONFIG_SERIAL_SH_SCI_CONSOLE */ |
| 206 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 207 | #ifdef CONFIG_SH_KGDB |
Paul Mundt | e108b2c | 2006-09-27 16:32:13 +0900 | [diff] [blame] | 208 | static int kgdb_sci_getchar(void) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 209 | { |
| 210 | int c; |
| 211 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 212 | /* Keep trying to read a character, this could be neater */ |
Paul Mundt | fa5da2f | 2007-03-08 17:27:37 +0900 | [diff] [blame] | 213 | while ((c = get_char(&kgdb_sci_port->port)) < 0) |
Paul Mundt | e108b2c | 2006-09-27 16:32:13 +0900 | [diff] [blame] | 214 | cpu_relax(); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 215 | |
| 216 | return c; |
| 217 | } |
| 218 | |
Paul Mundt | e108b2c | 2006-09-27 16:32:13 +0900 | [diff] [blame] | 219 | static inline void kgdb_sci_putchar(int c) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 220 | { |
Paul Mundt | fa5da2f | 2007-03-08 17:27:37 +0900 | [diff] [blame] | 221 | put_char(&kgdb_sci_port->port, c); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 222 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 223 | #endif /* CONFIG_SH_KGDB */ |
| 224 | |
| 225 | #if defined(__H8300S__) |
| 226 | enum { sci_disable, sci_enable }; |
| 227 | |
Paul Mundt | e108b2c | 2006-09-27 16:32:13 +0900 | [diff] [blame] | 228 | static void h8300_sci_config(struct uart_port* port, unsigned int ctrl) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 229 | { |
| 230 | volatile unsigned char *mstpcrl=(volatile unsigned char *)MSTPCRL; |
| 231 | int ch = (port->mapbase - SMR0) >> 3; |
| 232 | unsigned char mask = 1 << (ch+1); |
| 233 | |
| 234 | if (ctrl == sci_disable) { |
| 235 | *mstpcrl |= mask; |
| 236 | } else { |
| 237 | *mstpcrl &= ~mask; |
| 238 | } |
| 239 | } |
Paul Mundt | e108b2c | 2006-09-27 16:32:13 +0900 | [diff] [blame] | 240 | |
| 241 | static inline void h8300_sci_enable(struct uart_port *port) |
| 242 | { |
| 243 | h8300_sci_config(port, sci_enable); |
| 244 | } |
| 245 | |
| 246 | static inline void h8300_sci_disable(struct uart_port *port) |
| 247 | { |
| 248 | h8300_sci_config(port, sci_disable); |
| 249 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 250 | #endif |
| 251 | |
Paul Mundt | e108b2c | 2006-09-27 16:32:13 +0900 | [diff] [blame] | 252 | #if defined(SCI_ONLY) || defined(SCI_AND_SCIF) && \ |
| 253 | defined(__H8300H__) || defined(__H8300S__) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 254 | static void sci_init_pins_sci(struct uart_port* port, unsigned int cflag) |
| 255 | { |
| 256 | int ch = (port->mapbase - SMR0) >> 3; |
| 257 | |
| 258 | /* set DDR regs */ |
Paul Mundt | e108b2c | 2006-09-27 16:32:13 +0900 | [diff] [blame] | 259 | H8300_GPIO_DDR(h8300_sci_pins[ch].port, |
| 260 | h8300_sci_pins[ch].rx, |
| 261 | H8300_GPIO_INPUT); |
| 262 | H8300_GPIO_DDR(h8300_sci_pins[ch].port, |
| 263 | h8300_sci_pins[ch].tx, |
| 264 | H8300_GPIO_OUTPUT); |
| 265 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 266 | /* tx mark output*/ |
| 267 | H8300_SCI_DR(ch) |= h8300_sci_pins[ch].tx; |
| 268 | } |
Paul Mundt | e108b2c | 2006-09-27 16:32:13 +0900 | [diff] [blame] | 269 | #else |
| 270 | #define sci_init_pins_sci NULL |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 271 | #endif |
Paul Mundt | e108b2c | 2006-09-27 16:32:13 +0900 | [diff] [blame] | 272 | |
| 273 | #if defined(CONFIG_CPU_SUBTYPE_SH7707) || defined(CONFIG_CPU_SUBTYPE_SH7709) |
| 274 | static void sci_init_pins_irda(struct uart_port *port, unsigned int cflag) |
| 275 | { |
| 276 | unsigned int fcr_val = 0; |
| 277 | |
| 278 | if (cflag & CRTSCTS) |
| 279 | fcr_val |= SCFCR_MCE; |
| 280 | |
| 281 | sci_out(port, SCFCR, fcr_val); |
| 282 | } |
| 283 | #else |
| 284 | #define sci_init_pins_irda NULL |
| 285 | #endif |
| 286 | |
| 287 | #ifdef SCI_ONLY |
| 288 | #define sci_init_pins_scif NULL |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 289 | #endif |
| 290 | |
| 291 | #if defined(SCIF_ONLY) || defined(SCI_AND_SCIF) |
Magnus Damm | d89ddd1 | 2007-07-25 11:42:56 +0900 | [diff] [blame] | 292 | #if defined(CONFIG_CPU_SUBTYPE_SH7710) || defined(CONFIG_CPU_SUBTYPE_SH7712) |
Nobuhiro Iwamatsu | 9465a54 | 2007-03-27 18:13:51 +0900 | [diff] [blame] | 293 | static void sci_init_pins_scif(struct uart_port* port, unsigned int cflag) |
| 294 | { |
| 295 | unsigned int fcr_val = 0; |
| 296 | |
| 297 | set_sh771x_scif_pfc(port); |
| 298 | if (cflag & CRTSCTS) { |
| 299 | fcr_val |= SCFCR_MCE; |
| 300 | } |
| 301 | sci_out(port, SCFCR, fcr_val); |
| 302 | } |
Yoshihiro Shimoda | 31a49c4 | 2007-12-26 11:45:06 +0900 | [diff] [blame] | 303 | #elif defined(CONFIG_CPU_SUBTYPE_SH7720) || defined(CONFIG_CPU_SUBTYPE_SH7721) |
Markus Brunner | 3ea6bc3 | 2007-08-20 08:59:33 +0900 | [diff] [blame] | 304 | static void sci_init_pins_scif(struct uart_port *port, unsigned int cflag) |
| 305 | { |
| 306 | unsigned int fcr_val = 0; |
| 307 | unsigned short data; |
| 308 | |
| 309 | if (cflag & CRTSCTS) { |
| 310 | /* enable RTS/CTS */ |
| 311 | if (port->mapbase == 0xa4430000) { /* SCIF0 */ |
| 312 | /* Clear PTCR bit 9-2; enable all scif pins but sck */ |
| 313 | data = ctrl_inw(PORT_PTCR); |
| 314 | ctrl_outw((data & 0xfc03), PORT_PTCR); |
| 315 | } else if (port->mapbase == 0xa4438000) { /* SCIF1 */ |
| 316 | /* Clear PVCR bit 9-2 */ |
| 317 | data = ctrl_inw(PORT_PVCR); |
| 318 | ctrl_outw((data & 0xfc03), PORT_PVCR); |
| 319 | } |
| 320 | fcr_val |= SCFCR_MCE; |
| 321 | } else { |
| 322 | if (port->mapbase == 0xa4430000) { /* SCIF0 */ |
| 323 | /* Clear PTCR bit 5-2; enable only tx and rx */ |
| 324 | data = ctrl_inw(PORT_PTCR); |
| 325 | ctrl_outw((data & 0xffc3), PORT_PTCR); |
| 326 | } else if (port->mapbase == 0xa4438000) { /* SCIF1 */ |
| 327 | /* Clear PVCR bit 5-2 */ |
| 328 | data = ctrl_inw(PORT_PVCR); |
| 329 | ctrl_outw((data & 0xffc3), PORT_PVCR); |
| 330 | } |
| 331 | } |
| 332 | sci_out(port, SCFCR, fcr_val); |
| 333 | } |
Paul Mundt | b7a76e4 | 2006-02-01 03:06:06 -0800 | [diff] [blame] | 334 | #elif defined(CONFIG_CPU_SH3) |
Paul Mundt | e108b2c | 2006-09-27 16:32:13 +0900 | [diff] [blame] | 335 | /* For SH7705, SH7706, SH7707, SH7709, SH7709A, SH7729 */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 336 | static void sci_init_pins_scif(struct uart_port *port, unsigned int cflag) |
| 337 | { |
| 338 | unsigned int fcr_val = 0; |
Paul Mundt | b7a76e4 | 2006-02-01 03:06:06 -0800 | [diff] [blame] | 339 | unsigned short data; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 340 | |
Paul Mundt | b7a76e4 | 2006-02-01 03:06:06 -0800 | [diff] [blame] | 341 | /* We need to set SCPCR to enable RTS/CTS */ |
| 342 | data = ctrl_inw(SCPCR); |
| 343 | /* Clear out SCP7MD1,0, SCP6MD1,0, SCP4MD1,0*/ |
| 344 | ctrl_outw(data & 0x0fcf, SCPCR); |
| 345 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 346 | if (cflag & CRTSCTS) |
| 347 | fcr_val |= SCFCR_MCE; |
| 348 | else { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 349 | /* We need to set SCPCR to enable RTS/CTS */ |
| 350 | data = ctrl_inw(SCPCR); |
| 351 | /* Clear out SCP7MD1,0, SCP4MD1,0, |
| 352 | Set SCP6MD1,0 = {01} (output) */ |
Paul Mundt | b7a76e4 | 2006-02-01 03:06:06 -0800 | [diff] [blame] | 353 | ctrl_outw((data & 0x0fcf) | 0x1000, SCPCR); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 354 | |
| 355 | data = ctrl_inb(SCPDR); |
| 356 | /* Set /RTS2 (bit6) = 0 */ |
Paul Mundt | b7a76e4 | 2006-02-01 03:06:06 -0800 | [diff] [blame] | 357 | ctrl_outb(data & 0xbf, SCPDR); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 358 | } |
Paul Mundt | b7a76e4 | 2006-02-01 03:06:06 -0800 | [diff] [blame] | 359 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 360 | sci_out(port, SCFCR, fcr_val); |
| 361 | } |
Paul Mundt | 41504c3 | 2006-12-11 20:28:03 +0900 | [diff] [blame] | 362 | #elif defined(CONFIG_CPU_SUBTYPE_SH7722) |
| 363 | static void sci_init_pins_scif(struct uart_port *port, unsigned int cflag) |
| 364 | { |
| 365 | unsigned int fcr_val = 0; |
Magnus Damm | 346b746 | 2008-04-23 21:25:29 +0900 | [diff] [blame] | 366 | unsigned short data; |
Paul Mundt | 41504c3 | 2006-12-11 20:28:03 +0900 | [diff] [blame] | 367 | |
Magnus Damm | 346b746 | 2008-04-23 21:25:29 +0900 | [diff] [blame] | 368 | if (port->mapbase == 0xffe00000) { |
| 369 | data = ctrl_inw(PSCR); |
| 370 | data &= ~0x03cf; |
| 371 | if (cflag & CRTSCTS) |
| 372 | fcr_val |= SCFCR_MCE; |
| 373 | else |
| 374 | data |= 0x0340; |
Paul Mundt | 41504c3 | 2006-12-11 20:28:03 +0900 | [diff] [blame] | 375 | |
Magnus Damm | 346b746 | 2008-04-23 21:25:29 +0900 | [diff] [blame] | 376 | ctrl_outw(data, PSCR); |
Paul Mundt | 41504c3 | 2006-12-11 20:28:03 +0900 | [diff] [blame] | 377 | } |
Magnus Damm | 346b746 | 2008-04-23 21:25:29 +0900 | [diff] [blame] | 378 | /* SCIF1 and SCIF2 should be setup by board code */ |
Paul Mundt | 41504c3 | 2006-12-11 20:28:03 +0900 | [diff] [blame] | 379 | |
| 380 | sci_out(port, SCFCR, fcr_val); |
| 381 | } |
Paul Mundt | 178dd0c | 2008-04-09 17:56:18 +0900 | [diff] [blame] | 382 | #elif defined(CONFIG_CPU_SUBTYPE_SH7723) |
| 383 | static void sci_init_pins_scif(struct uart_port *port, unsigned int cflag) |
| 384 | { |
| 385 | /* Nothing to do here.. */ |
| 386 | sci_out(port, SCFCR, 0); |
| 387 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 388 | #else |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 389 | /* For SH7750 */ |
| 390 | static void sci_init_pins_scif(struct uart_port *port, unsigned int cflag) |
| 391 | { |
| 392 | unsigned int fcr_val = 0; |
| 393 | |
| 394 | if (cflag & CRTSCTS) { |
| 395 | fcr_val |= SCFCR_MCE; |
| 396 | } else { |
Magnus Damm | 9109a30 | 2008-02-08 17:31:24 +0900 | [diff] [blame] | 397 | #if defined(CONFIG_CPU_SUBTYPE_SH7343) || defined(CONFIG_CPU_SUBTYPE_SH7366) |
Paul Mundt | e108b2c | 2006-09-27 16:32:13 +0900 | [diff] [blame] | 398 | /* Nothing */ |
Yoshihiro Shimoda | 7d740a0 | 2008-01-07 14:40:07 +0900 | [diff] [blame] | 399 | #elif defined(CONFIG_CPU_SUBTYPE_SH7763) || \ |
| 400 | defined(CONFIG_CPU_SUBTYPE_SH7780) || \ |
Paul Mundt | 2b1bd1a | 2007-06-20 18:27:10 +0900 | [diff] [blame] | 401 | defined(CONFIG_CPU_SUBTYPE_SH7785) || \ |
| 402 | defined(CONFIG_CPU_SUBTYPE_SHX3) |
Paul Mundt | b7a76e4 | 2006-02-01 03:06:06 -0800 | [diff] [blame] | 403 | ctrl_outw(0x0080, SCSPTR0); /* Set RTS = 1 */ |
| 404 | #else |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 405 | ctrl_outw(0x0080, SCSPTR2); /* Set RTS = 1 */ |
Paul Mundt | b7a76e4 | 2006-02-01 03:06:06 -0800 | [diff] [blame] | 406 | #endif |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 407 | } |
| 408 | sci_out(port, SCFCR, fcr_val); |
| 409 | } |
Paul Mundt | e108b2c | 2006-09-27 16:32:13 +0900 | [diff] [blame] | 410 | #endif |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 411 | |
Paul Mundt | 32351a2 | 2007-03-12 14:38:59 +0900 | [diff] [blame] | 412 | #if defined(CONFIG_CPU_SUBTYPE_SH7760) || \ |
Yoshihiro Shimoda | 7d740a0 | 2008-01-07 14:40:07 +0900 | [diff] [blame] | 413 | defined(CONFIG_CPU_SUBTYPE_SH7763) || \ |
Paul Mundt | 32351a2 | 2007-03-12 14:38:59 +0900 | [diff] [blame] | 414 | defined(CONFIG_CPU_SUBTYPE_SH7780) || \ |
| 415 | defined(CONFIG_CPU_SUBTYPE_SH7785) |
Paul Mundt | e108b2c | 2006-09-27 16:32:13 +0900 | [diff] [blame] | 416 | static inline int scif_txroom(struct uart_port *port) |
| 417 | { |
Yutaro Ebihara | cae167d | 2008-03-11 13:58:50 +0900 | [diff] [blame] | 418 | return SCIF_TXROOM_MAX - (sci_in(port, SCTFDR) & 0xff); |
Paul Mundt | e108b2c | 2006-09-27 16:32:13 +0900 | [diff] [blame] | 419 | } |
| 420 | |
| 421 | static inline int scif_rxroom(struct uart_port *port) |
| 422 | { |
Yutaro Ebihara | cae167d | 2008-03-11 13:58:50 +0900 | [diff] [blame] | 423 | return sci_in(port, SCRFDR) & 0xff; |
Paul Mundt | e108b2c | 2006-09-27 16:32:13 +0900 | [diff] [blame] | 424 | } |
| 425 | #else |
| 426 | static inline int scif_txroom(struct uart_port *port) |
| 427 | { |
| 428 | return SCIF_TXROOM_MAX - (sci_in(port, SCFDR) >> 8); |
| 429 | } |
| 430 | |
| 431 | static inline int scif_rxroom(struct uart_port *port) |
| 432 | { |
| 433 | return sci_in(port, SCFDR) & SCIF_RFDC_MASK; |
| 434 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 435 | #endif |
| 436 | #endif /* SCIF_ONLY || SCI_AND_SCIF */ |
| 437 | |
Paul Mundt | e108b2c | 2006-09-27 16:32:13 +0900 | [diff] [blame] | 438 | static inline int sci_txroom(struct uart_port *port) |
| 439 | { |
| 440 | return ((sci_in(port, SCxSR) & SCI_TDRE) != 0); |
| 441 | } |
| 442 | |
| 443 | static inline int sci_rxroom(struct uart_port *port) |
| 444 | { |
| 445 | return ((sci_in(port, SCxSR) & SCxSR_RDxF(port)) != 0); |
| 446 | } |
| 447 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 448 | /* ********************************************************************** * |
| 449 | * the interrupt related routines * |
| 450 | * ********************************************************************** */ |
| 451 | |
| 452 | static void sci_transmit_chars(struct uart_port *port) |
| 453 | { |
| 454 | struct circ_buf *xmit = &port->info->xmit; |
| 455 | unsigned int stopped = uart_tx_stopped(port); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 456 | unsigned short status; |
| 457 | unsigned short ctrl; |
Paul Mundt | e108b2c | 2006-09-27 16:32:13 +0900 | [diff] [blame] | 458 | int count; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 459 | |
| 460 | status = sci_in(port, SCxSR); |
| 461 | if (!(status & SCxSR_TDxE(port))) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 462 | ctrl = sci_in(port, SCSCR); |
| 463 | if (uart_circ_empty(xmit)) { |
| 464 | ctrl &= ~SCI_CTRL_FLAGS_TIE; |
| 465 | } else { |
| 466 | ctrl |= SCI_CTRL_FLAGS_TIE; |
| 467 | } |
| 468 | sci_out(port, SCSCR, ctrl); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 469 | return; |
| 470 | } |
| 471 | |
Paul Mundt | e108b2c | 2006-09-27 16:32:13 +0900 | [diff] [blame] | 472 | #ifndef SCI_ONLY |
| 473 | if (port->type == PORT_SCIF) |
| 474 | count = scif_txroom(port); |
| 475 | else |
Paul Mundt | b7a76e4 | 2006-02-01 03:06:06 -0800 | [diff] [blame] | 476 | #endif |
Paul Mundt | e108b2c | 2006-09-27 16:32:13 +0900 | [diff] [blame] | 477 | count = sci_txroom(port); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 478 | |
| 479 | do { |
| 480 | unsigned char c; |
| 481 | |
| 482 | if (port->x_char) { |
| 483 | c = port->x_char; |
| 484 | port->x_char = 0; |
| 485 | } else if (!uart_circ_empty(xmit) && !stopped) { |
| 486 | c = xmit->buf[xmit->tail]; |
| 487 | xmit->tail = (xmit->tail + 1) & (UART_XMIT_SIZE - 1); |
| 488 | } else { |
| 489 | break; |
| 490 | } |
| 491 | |
| 492 | sci_out(port, SCxTDR, c); |
| 493 | |
| 494 | port->icount.tx++; |
| 495 | } while (--count > 0); |
| 496 | |
| 497 | sci_out(port, SCxSR, SCxSR_TDxE_CLEAR(port)); |
| 498 | |
| 499 | if (uart_circ_chars_pending(xmit) < WAKEUP_CHARS) |
| 500 | uart_write_wakeup(port); |
| 501 | if (uart_circ_empty(xmit)) { |
Russell King | b129a8c | 2005-08-31 10:12:14 +0100 | [diff] [blame] | 502 | sci_stop_tx(port); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 503 | } else { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 504 | ctrl = sci_in(port, SCSCR); |
| 505 | |
| 506 | #if !defined(SCI_ONLY) |
| 507 | if (port->type == PORT_SCIF) { |
| 508 | sci_in(port, SCxSR); /* Dummy read */ |
| 509 | sci_out(port, SCxSR, SCxSR_TDxE_CLEAR(port)); |
| 510 | } |
| 511 | #endif |
| 512 | |
| 513 | ctrl |= SCI_CTRL_FLAGS_TIE; |
| 514 | sci_out(port, SCSCR, ctrl); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 515 | } |
| 516 | } |
| 517 | |
| 518 | /* On SH3, SCIF may read end-of-break as a space->mark char */ |
| 519 | #define STEPFN(c) ({int __c=(c); (((__c-1)|(__c)) == -1); }) |
| 520 | |
David Howells | 7d12e78 | 2006-10-05 14:55:46 +0100 | [diff] [blame] | 521 | static inline void sci_receive_chars(struct uart_port *port) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 522 | { |
Paul Mundt | e108b2c | 2006-09-27 16:32:13 +0900 | [diff] [blame] | 523 | struct sci_port *sci_port = (struct sci_port *)port; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 524 | struct tty_struct *tty = port->info->tty; |
| 525 | int i, count, copied = 0; |
| 526 | unsigned short status; |
Alan Cox | 33f0f88 | 2006-01-09 20:54:13 -0800 | [diff] [blame] | 527 | unsigned char flag; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 528 | |
| 529 | status = sci_in(port, SCxSR); |
| 530 | if (!(status & SCxSR_RDxF(port))) |
| 531 | return; |
| 532 | |
| 533 | while (1) { |
| 534 | #if !defined(SCI_ONLY) |
Paul Mundt | e108b2c | 2006-09-27 16:32:13 +0900 | [diff] [blame] | 535 | if (port->type == PORT_SCIF) |
| 536 | count = scif_rxroom(port); |
| 537 | else |
Paul Mundt | b7a76e4 | 2006-02-01 03:06:06 -0800 | [diff] [blame] | 538 | #endif |
Paul Mundt | e108b2c | 2006-09-27 16:32:13 +0900 | [diff] [blame] | 539 | count = sci_rxroom(port); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 540 | |
| 541 | /* 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] | 542 | count = tty_buffer_request_room(tty, count); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 543 | |
| 544 | /* If for any reason we can't copy more data, we're done! */ |
| 545 | if (count == 0) |
| 546 | break; |
| 547 | |
| 548 | if (port->type == PORT_SCI) { |
| 549 | char c = sci_in(port, SCxRDR); |
David Howells | 7d12e78 | 2006-10-05 14:55:46 +0100 | [diff] [blame] | 550 | if (uart_handle_sysrq_char(port, c) || sci_port->break_flag) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 551 | count = 0; |
Paul Mundt | e108b2c | 2006-09-27 16:32:13 +0900 | [diff] [blame] | 552 | else { |
| 553 | tty_insert_flip_char(tty, c, TTY_NORMAL); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 554 | } |
| 555 | } else { |
| 556 | for (i=0; i<count; i++) { |
| 557 | char c = sci_in(port, SCxRDR); |
| 558 | status = sci_in(port, SCxSR); |
| 559 | #if defined(CONFIG_CPU_SH3) |
| 560 | /* Skip "chars" during break */ |
Paul Mundt | e108b2c | 2006-09-27 16:32:13 +0900 | [diff] [blame] | 561 | if (sci_port->break_flag) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 562 | if ((c == 0) && |
| 563 | (status & SCxSR_FER(port))) { |
| 564 | count--; i--; |
| 565 | continue; |
| 566 | } |
Paul Mundt | e108b2c | 2006-09-27 16:32:13 +0900 | [diff] [blame] | 567 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 568 | /* Nonzero => end-of-break */ |
| 569 | pr_debug("scif: debounce<%02x>\n", c); |
Paul Mundt | e108b2c | 2006-09-27 16:32:13 +0900 | [diff] [blame] | 570 | sci_port->break_flag = 0; |
| 571 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 572 | if (STEPFN(c)) { |
| 573 | count--; i--; |
| 574 | continue; |
| 575 | } |
| 576 | } |
| 577 | #endif /* CONFIG_CPU_SH3 */ |
David Howells | 7d12e78 | 2006-10-05 14:55:46 +0100 | [diff] [blame] | 578 | if (uart_handle_sysrq_char(port, c)) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 579 | count--; i--; |
| 580 | continue; |
| 581 | } |
| 582 | |
| 583 | /* Store data and status */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 584 | if (status&SCxSR_FER(port)) { |
Alan Cox | 33f0f88 | 2006-01-09 20:54:13 -0800 | [diff] [blame] | 585 | flag = TTY_FRAME; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 586 | pr_debug("sci: frame error\n"); |
| 587 | } else if (status&SCxSR_PER(port)) { |
Alan Cox | 33f0f88 | 2006-01-09 20:54:13 -0800 | [diff] [blame] | 588 | flag = TTY_PARITY; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 589 | pr_debug("sci: parity error\n"); |
Alan Cox | 33f0f88 | 2006-01-09 20:54:13 -0800 | [diff] [blame] | 590 | } else |
| 591 | flag = TTY_NORMAL; |
| 592 | tty_insert_flip_char(tty, c, flag); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 593 | } |
| 594 | } |
| 595 | |
| 596 | sci_in(port, SCxSR); /* dummy read */ |
| 597 | sci_out(port, SCxSR, SCxSR_RDxF_CLEAR(port)); |
| 598 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 599 | copied += count; |
| 600 | port->icount.rx += count; |
| 601 | } |
| 602 | |
| 603 | if (copied) { |
| 604 | /* Tell the rest of the system the news. New characters! */ |
| 605 | tty_flip_buffer_push(tty); |
| 606 | } else { |
| 607 | sci_in(port, SCxSR); /* dummy read */ |
| 608 | sci_out(port, SCxSR, SCxSR_RDxF_CLEAR(port)); |
| 609 | } |
| 610 | } |
| 611 | |
| 612 | #define SCI_BREAK_JIFFIES (HZ/20) |
| 613 | /* The sci generates interrupts during the break, |
| 614 | * 1 per millisecond or so during the break period, for 9600 baud. |
| 615 | * So dont bother disabling interrupts. |
| 616 | * But dont want more than 1 break event. |
| 617 | * Use a kernel timer to periodically poll the rx line until |
| 618 | * the break is finished. |
| 619 | */ |
| 620 | static void sci_schedule_break_timer(struct sci_port *port) |
| 621 | { |
| 622 | port->break_timer.expires = jiffies + SCI_BREAK_JIFFIES; |
| 623 | add_timer(&port->break_timer); |
| 624 | } |
| 625 | /* Ensure that two consecutive samples find the break over. */ |
| 626 | static void sci_break_timer(unsigned long data) |
| 627 | { |
Paul Mundt | e108b2c | 2006-09-27 16:32:13 +0900 | [diff] [blame] | 628 | struct sci_port *port = (struct sci_port *)data; |
| 629 | |
| 630 | if (sci_rxd_in(&port->port) == 0) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 631 | port->break_flag = 1; |
Paul Mundt | e108b2c | 2006-09-27 16:32:13 +0900 | [diff] [blame] | 632 | sci_schedule_break_timer(port); |
| 633 | } else if (port->break_flag == 1) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 634 | /* break is over. */ |
| 635 | port->break_flag = 2; |
Paul Mundt | e108b2c | 2006-09-27 16:32:13 +0900 | [diff] [blame] | 636 | sci_schedule_break_timer(port); |
| 637 | } else |
| 638 | port->break_flag = 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 639 | } |
| 640 | |
| 641 | static inline int sci_handle_errors(struct uart_port *port) |
| 642 | { |
| 643 | int copied = 0; |
| 644 | unsigned short status = sci_in(port, SCxSR); |
| 645 | struct tty_struct *tty = port->info->tty; |
| 646 | |
Paul Mundt | e108b2c | 2006-09-27 16:32:13 +0900 | [diff] [blame] | 647 | if (status & SCxSR_ORER(port)) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 648 | /* overrun error */ |
Paul Mundt | e108b2c | 2006-09-27 16:32:13 +0900 | [diff] [blame] | 649 | if (tty_insert_flip_char(tty, 0, TTY_OVERRUN)) |
Alan Cox | 33f0f88 | 2006-01-09 20:54:13 -0800 | [diff] [blame] | 650 | copied++; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 651 | pr_debug("sci: overrun error\n"); |
| 652 | } |
| 653 | |
Paul Mundt | e108b2c | 2006-09-27 16:32:13 +0900 | [diff] [blame] | 654 | if (status & SCxSR_FER(port)) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 655 | if (sci_rxd_in(port) == 0) { |
| 656 | /* Notify of BREAK */ |
Paul Mundt | e108b2c | 2006-09-27 16:32:13 +0900 | [diff] [blame] | 657 | struct sci_port *sci_port = (struct sci_port *)port; |
| 658 | |
| 659 | if (!sci_port->break_flag) { |
| 660 | sci_port->break_flag = 1; |
| 661 | sci_schedule_break_timer(sci_port); |
| 662 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 663 | /* Do sysrq handling. */ |
Paul Mundt | e108b2c | 2006-09-27 16:32:13 +0900 | [diff] [blame] | 664 | if (uart_handle_break(port)) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 665 | return 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 666 | pr_debug("sci: BREAK detected\n"); |
Paul Mundt | e108b2c | 2006-09-27 16:32:13 +0900 | [diff] [blame] | 667 | if (tty_insert_flip_char(tty, 0, TTY_BREAK)) |
Alan Cox | 33f0f88 | 2006-01-09 20:54:13 -0800 | [diff] [blame] | 668 | copied++; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 669 | } |
Paul Mundt | e108b2c | 2006-09-27 16:32:13 +0900 | [diff] [blame] | 670 | } else { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 671 | /* frame error */ |
Paul Mundt | e108b2c | 2006-09-27 16:32:13 +0900 | [diff] [blame] | 672 | if (tty_insert_flip_char(tty, 0, TTY_FRAME)) |
Alan Cox | 33f0f88 | 2006-01-09 20:54:13 -0800 | [diff] [blame] | 673 | copied++; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 674 | pr_debug("sci: frame error\n"); |
| 675 | } |
| 676 | } |
| 677 | |
Paul Mundt | e108b2c | 2006-09-27 16:32:13 +0900 | [diff] [blame] | 678 | if (status & SCxSR_PER(port)) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 679 | /* parity error */ |
Paul Mundt | e108b2c | 2006-09-27 16:32:13 +0900 | [diff] [blame] | 680 | if (tty_insert_flip_char(tty, 0, TTY_PARITY)) |
| 681 | copied++; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 682 | pr_debug("sci: parity error\n"); |
| 683 | } |
| 684 | |
Alan Cox | 33f0f88 | 2006-01-09 20:54:13 -0800 | [diff] [blame] | 685 | if (copied) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 686 | tty_flip_buffer_push(tty); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 687 | |
| 688 | return copied; |
| 689 | } |
| 690 | |
| 691 | static inline int sci_handle_breaks(struct uart_port *port) |
| 692 | { |
| 693 | int copied = 0; |
| 694 | unsigned short status = sci_in(port, SCxSR); |
| 695 | struct tty_struct *tty = port->info->tty; |
| 696 | struct sci_port *s = &sci_ports[port->line]; |
| 697 | |
Paul Mundt | 0b3d4ef | 2007-03-14 13:22:37 +0900 | [diff] [blame] | 698 | if (uart_handle_break(port)) |
| 699 | return 0; |
| 700 | |
Paul Mundt | b7a76e4 | 2006-02-01 03:06:06 -0800 | [diff] [blame] | 701 | if (!s->break_flag && status & SCxSR_BRK(port)) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 702 | #if defined(CONFIG_CPU_SH3) |
| 703 | /* Debounce break */ |
| 704 | s->break_flag = 1; |
| 705 | #endif |
| 706 | /* Notify of BREAK */ |
Paul Mundt | e108b2c | 2006-09-27 16:32:13 +0900 | [diff] [blame] | 707 | if (tty_insert_flip_char(tty, 0, TTY_BREAK)) |
Alan Cox | 33f0f88 | 2006-01-09 20:54:13 -0800 | [diff] [blame] | 708 | copied++; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 709 | pr_debug("sci: BREAK detected\n"); |
| 710 | } |
| 711 | |
| 712 | #if defined(SCIF_ORER) |
| 713 | /* XXX: Handle SCIF overrun error */ |
| 714 | if (port->type == PORT_SCIF && (sci_in(port, SCLSR) & SCIF_ORER) != 0) { |
| 715 | sci_out(port, SCLSR, 0); |
Paul Mundt | e108b2c | 2006-09-27 16:32:13 +0900 | [diff] [blame] | 716 | if (tty_insert_flip_char(tty, 0, TTY_OVERRUN)) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 717 | copied++; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 718 | pr_debug("sci: overrun error\n"); |
| 719 | } |
| 720 | } |
| 721 | #endif |
| 722 | |
Alan Cox | 33f0f88 | 2006-01-09 20:54:13 -0800 | [diff] [blame] | 723 | if (copied) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 724 | tty_flip_buffer_push(tty); |
Paul Mundt | e108b2c | 2006-09-27 16:32:13 +0900 | [diff] [blame] | 725 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 726 | return copied; |
| 727 | } |
| 728 | |
David Howells | 7d12e78 | 2006-10-05 14:55:46 +0100 | [diff] [blame] | 729 | static irqreturn_t sci_rx_interrupt(int irq, void *port) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 730 | { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 731 | /* I think sci_receive_chars has to be called irrespective |
| 732 | * of whether the I_IXOFF is set, otherwise, how is the interrupt |
| 733 | * to be disabled? |
| 734 | */ |
David Howells | 7d12e78 | 2006-10-05 14:55:46 +0100 | [diff] [blame] | 735 | sci_receive_chars(port); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 736 | |
| 737 | return IRQ_HANDLED; |
| 738 | } |
| 739 | |
David Howells | 7d12e78 | 2006-10-05 14:55:46 +0100 | [diff] [blame] | 740 | static irqreturn_t sci_tx_interrupt(int irq, void *ptr) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 741 | { |
| 742 | struct uart_port *port = ptr; |
| 743 | |
Paul Mundt | e108b2c | 2006-09-27 16:32:13 +0900 | [diff] [blame] | 744 | spin_lock_irq(&port->lock); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 745 | sci_transmit_chars(port); |
Paul Mundt | e108b2c | 2006-09-27 16:32:13 +0900 | [diff] [blame] | 746 | spin_unlock_irq(&port->lock); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 747 | |
| 748 | return IRQ_HANDLED; |
| 749 | } |
| 750 | |
David Howells | 7d12e78 | 2006-10-05 14:55:46 +0100 | [diff] [blame] | 751 | static irqreturn_t sci_er_interrupt(int irq, void *ptr) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 752 | { |
| 753 | struct uart_port *port = ptr; |
| 754 | |
| 755 | /* Handle errors */ |
| 756 | if (port->type == PORT_SCI) { |
| 757 | if (sci_handle_errors(port)) { |
| 758 | /* discard character in rx buffer */ |
| 759 | sci_in(port, SCxSR); |
| 760 | sci_out(port, SCxSR, SCxSR_RDxF_CLEAR(port)); |
| 761 | } |
| 762 | } else { |
| 763 | #if defined(SCIF_ORER) |
| 764 | if((sci_in(port, SCLSR) & SCIF_ORER) != 0) { |
| 765 | struct tty_struct *tty = port->info->tty; |
| 766 | |
| 767 | sci_out(port, SCLSR, 0); |
Alan Cox | 33f0f88 | 2006-01-09 20:54:13 -0800 | [diff] [blame] | 768 | tty_insert_flip_char(tty, 0, TTY_OVERRUN); |
| 769 | tty_flip_buffer_push(tty); |
| 770 | pr_debug("scif: overrun error\n"); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 771 | } |
| 772 | #endif |
David Howells | 7d12e78 | 2006-10-05 14:55:46 +0100 | [diff] [blame] | 773 | sci_rx_interrupt(irq, ptr); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 774 | } |
| 775 | |
| 776 | sci_out(port, SCxSR, SCxSR_ERROR_CLEAR(port)); |
| 777 | |
| 778 | /* Kick the transmission */ |
David Howells | 7d12e78 | 2006-10-05 14:55:46 +0100 | [diff] [blame] | 779 | sci_tx_interrupt(irq, ptr); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 780 | |
| 781 | return IRQ_HANDLED; |
| 782 | } |
| 783 | |
David Howells | 7d12e78 | 2006-10-05 14:55:46 +0100 | [diff] [blame] | 784 | static irqreturn_t sci_br_interrupt(int irq, void *ptr) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 785 | { |
| 786 | struct uart_port *port = ptr; |
| 787 | |
| 788 | /* Handle BREAKs */ |
| 789 | sci_handle_breaks(port); |
| 790 | sci_out(port, SCxSR, SCxSR_BREAK_CLEAR(port)); |
| 791 | |
| 792 | return IRQ_HANDLED; |
| 793 | } |
| 794 | |
David Howells | 7d12e78 | 2006-10-05 14:55:46 +0100 | [diff] [blame] | 795 | static irqreturn_t sci_mpxed_interrupt(int irq, void *ptr) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 796 | { |
| 797 | unsigned short ssr_status, scr_status; |
| 798 | struct uart_port *port = ptr; |
| 799 | |
| 800 | ssr_status = sci_in(port,SCxSR); |
| 801 | scr_status = sci_in(port,SCSCR); |
| 802 | |
| 803 | /* Tx Interrupt */ |
Paul Mundt | e108b2c | 2006-09-27 16:32:13 +0900 | [diff] [blame] | 804 | if ((ssr_status & 0x0020) && (scr_status & 0x0080)) |
David Howells | 7d12e78 | 2006-10-05 14:55:46 +0100 | [diff] [blame] | 805 | sci_tx_interrupt(irq, ptr); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 806 | /* Rx Interrupt */ |
Paul Mundt | e108b2c | 2006-09-27 16:32:13 +0900 | [diff] [blame] | 807 | if ((ssr_status & 0x0002) && (scr_status & 0x0040)) |
David Howells | 7d12e78 | 2006-10-05 14:55:46 +0100 | [diff] [blame] | 808 | sci_rx_interrupt(irq, ptr); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 809 | /* Error Interrupt */ |
Paul Mundt | e108b2c | 2006-09-27 16:32:13 +0900 | [diff] [blame] | 810 | if ((ssr_status & 0x0080) && (scr_status & 0x0400)) |
David Howells | 7d12e78 | 2006-10-05 14:55:46 +0100 | [diff] [blame] | 811 | sci_er_interrupt(irq, ptr); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 812 | /* Break Interrupt */ |
Paul Mundt | e108b2c | 2006-09-27 16:32:13 +0900 | [diff] [blame] | 813 | if ((ssr_status & 0x0010) && (scr_status & 0x0200)) |
David Howells | 7d12e78 | 2006-10-05 14:55:46 +0100 | [diff] [blame] | 814 | sci_br_interrupt(irq, ptr); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 815 | |
| 816 | return IRQ_HANDLED; |
| 817 | } |
| 818 | |
| 819 | #ifdef CONFIG_CPU_FREQ |
| 820 | /* |
| 821 | * Here we define a transistion notifier so that we can update all of our |
| 822 | * ports' baud rate when the peripheral clock changes. |
| 823 | */ |
Paul Mundt | e108b2c | 2006-09-27 16:32:13 +0900 | [diff] [blame] | 824 | static int sci_notifier(struct notifier_block *self, |
| 825 | unsigned long phase, void *p) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 826 | { |
| 827 | struct cpufreq_freqs *freqs = p; |
| 828 | int i; |
| 829 | |
| 830 | if ((phase == CPUFREQ_POSTCHANGE) || |
| 831 | (phase == CPUFREQ_RESUMECHANGE)){ |
| 832 | for (i = 0; i < SCI_NPORTS; i++) { |
| 833 | struct uart_port *port = &sci_ports[i].port; |
Paul Mundt | b7a76e4 | 2006-02-01 03:06:06 -0800 | [diff] [blame] | 834 | struct clk *clk; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 835 | |
| 836 | /* |
| 837 | * Update the uartclk per-port if frequency has |
| 838 | * changed, since it will no longer necessarily be |
| 839 | * consistent with the old frequency. |
| 840 | * |
| 841 | * Really we want to be able to do something like |
| 842 | * uart_change_speed() or something along those lines |
| 843 | * here to implicitly reset the per-port baud rate.. |
| 844 | * |
| 845 | * Clean this up later.. |
| 846 | */ |
Paul Mundt | 1d11856 | 2006-12-01 13:15:14 +0900 | [diff] [blame] | 847 | clk = clk_get(NULL, "module_clk"); |
Paul Mundt | b7a76e4 | 2006-02-01 03:06:06 -0800 | [diff] [blame] | 848 | port->uartclk = clk_get_rate(clk) * 16; |
| 849 | clk_put(clk); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 850 | } |
| 851 | |
Paul Mundt | e108b2c | 2006-09-27 16:32:13 +0900 | [diff] [blame] | 852 | printk(KERN_INFO "%s: got a postchange notification " |
| 853 | "for cpu %d (old %d, new %d)\n", |
Harvey Harrison | 71cc2c2 | 2008-04-30 00:55:10 -0700 | [diff] [blame] | 854 | __func__, freqs->cpu, freqs->old, freqs->new); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 855 | } |
| 856 | |
| 857 | return NOTIFY_OK; |
| 858 | } |
| 859 | |
| 860 | static struct notifier_block sci_nb = { &sci_notifier, NULL, 0 }; |
| 861 | #endif /* CONFIG_CPU_FREQ */ |
| 862 | |
| 863 | static int sci_request_irq(struct sci_port *port) |
| 864 | { |
| 865 | int i; |
David Howells | 7d12e78 | 2006-10-05 14:55:46 +0100 | [diff] [blame] | 866 | irqreturn_t (*handlers[4])(int irq, void *ptr) = { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 867 | sci_er_interrupt, sci_rx_interrupt, sci_tx_interrupt, |
| 868 | sci_br_interrupt, |
| 869 | }; |
| 870 | const char *desc[] = { "SCI Receive Error", "SCI Receive Data Full", |
| 871 | "SCI Transmit Data Empty", "SCI Break" }; |
| 872 | |
| 873 | if (port->irqs[0] == port->irqs[1]) { |
| 874 | if (!port->irqs[0]) { |
| 875 | printk(KERN_ERR "sci: Cannot allocate irq.(IRQ=0)\n"); |
| 876 | return -ENODEV; |
| 877 | } |
Paul Mundt | e108b2c | 2006-09-27 16:32:13 +0900 | [diff] [blame] | 878 | |
| 879 | if (request_irq(port->irqs[0], sci_mpxed_interrupt, |
Paul Mundt | 35f3c51 | 2006-10-06 15:31:16 +0900 | [diff] [blame] | 880 | IRQF_DISABLED, "sci", port)) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 881 | printk(KERN_ERR "sci: Cannot allocate irq.\n"); |
| 882 | return -ENODEV; |
| 883 | } |
| 884 | } else { |
| 885 | for (i = 0; i < ARRAY_SIZE(handlers); i++) { |
| 886 | if (!port->irqs[i]) |
| 887 | continue; |
Paul Mundt | e108b2c | 2006-09-27 16:32:13 +0900 | [diff] [blame] | 888 | if (request_irq(port->irqs[i], handlers[i], |
Paul Mundt | 35f3c51 | 2006-10-06 15:31:16 +0900 | [diff] [blame] | 889 | IRQF_DISABLED, desc[i], port)) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 890 | printk(KERN_ERR "sci: Cannot allocate irq.\n"); |
| 891 | return -ENODEV; |
| 892 | } |
| 893 | } |
| 894 | } |
| 895 | |
| 896 | return 0; |
| 897 | } |
| 898 | |
| 899 | static void sci_free_irq(struct sci_port *port) |
| 900 | { |
| 901 | int i; |
| 902 | |
| 903 | if (port->irqs[0] == port->irqs[1]) { |
| 904 | if (!port->irqs[0]) |
| 905 | printk("sci: sci_free_irq error\n"); |
| 906 | else |
| 907 | free_irq(port->irqs[0], port); |
| 908 | } else { |
| 909 | for (i = 0; i < ARRAY_SIZE(port->irqs); i++) { |
| 910 | if (!port->irqs[i]) |
| 911 | continue; |
| 912 | |
| 913 | free_irq(port->irqs[i], port); |
| 914 | } |
| 915 | } |
| 916 | } |
| 917 | |
| 918 | static unsigned int sci_tx_empty(struct uart_port *port) |
| 919 | { |
| 920 | /* Can't detect */ |
| 921 | return TIOCSER_TEMT; |
| 922 | } |
| 923 | |
| 924 | static void sci_set_mctrl(struct uart_port *port, unsigned int mctrl) |
| 925 | { |
| 926 | /* This routine is used for seting signals of: DTR, DCD, CTS/RTS */ |
| 927 | /* We use SCIF's hardware for CTS/RTS, so don't need any for that. */ |
| 928 | /* If you have signals for DTR and DCD, please implement here. */ |
| 929 | } |
| 930 | |
| 931 | static unsigned int sci_get_mctrl(struct uart_port *port) |
| 932 | { |
| 933 | /* This routine is used for geting signals of: DTR, DCD, DSR, RI, |
| 934 | and CTS/RTS */ |
| 935 | |
| 936 | return TIOCM_DTR | TIOCM_RTS | TIOCM_DSR; |
| 937 | } |
| 938 | |
Russell King | b129a8c | 2005-08-31 10:12:14 +0100 | [diff] [blame] | 939 | static void sci_start_tx(struct uart_port *port) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 940 | { |
Paul Mundt | e108b2c | 2006-09-27 16:32:13 +0900 | [diff] [blame] | 941 | unsigned short ctrl; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 942 | |
Paul Mundt | e108b2c | 2006-09-27 16:32:13 +0900 | [diff] [blame] | 943 | /* Set TIE (Transmit Interrupt Enable) bit in SCSCR */ |
| 944 | ctrl = sci_in(port, SCSCR); |
| 945 | ctrl |= SCI_CTRL_FLAGS_TIE; |
| 946 | sci_out(port, SCSCR, ctrl); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 947 | } |
| 948 | |
Russell King | b129a8c | 2005-08-31 10:12:14 +0100 | [diff] [blame] | 949 | static void sci_stop_tx(struct uart_port *port) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 950 | { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 951 | unsigned short ctrl; |
| 952 | |
| 953 | /* Clear TIE (Transmit Interrupt Enable) bit in SCSCR */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 954 | ctrl = sci_in(port, SCSCR); |
| 955 | ctrl &= ~SCI_CTRL_FLAGS_TIE; |
| 956 | sci_out(port, SCSCR, ctrl); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 957 | } |
| 958 | |
| 959 | static void sci_start_rx(struct uart_port *port, unsigned int tty_start) |
| 960 | { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 961 | unsigned short ctrl; |
| 962 | |
| 963 | /* Set RIE (Receive Interrupt Enable) bit in SCSCR */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 964 | ctrl = sci_in(port, SCSCR); |
| 965 | ctrl |= SCI_CTRL_FLAGS_RIE | SCI_CTRL_FLAGS_REIE; |
| 966 | sci_out(port, SCSCR, ctrl); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 967 | } |
| 968 | |
| 969 | static void sci_stop_rx(struct uart_port *port) |
| 970 | { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 971 | unsigned short ctrl; |
| 972 | |
| 973 | /* Clear RIE (Receive Interrupt Enable) bit in SCSCR */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 974 | ctrl = sci_in(port, SCSCR); |
| 975 | ctrl &= ~(SCI_CTRL_FLAGS_RIE | SCI_CTRL_FLAGS_REIE); |
| 976 | sci_out(port, SCSCR, ctrl); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 977 | } |
| 978 | |
| 979 | static void sci_enable_ms(struct uart_port *port) |
| 980 | { |
| 981 | /* Nothing here yet .. */ |
| 982 | } |
| 983 | |
| 984 | static void sci_break_ctl(struct uart_port *port, int break_state) |
| 985 | { |
| 986 | /* Nothing here yet .. */ |
| 987 | } |
| 988 | |
| 989 | static int sci_startup(struct uart_port *port) |
| 990 | { |
| 991 | struct sci_port *s = &sci_ports[port->line]; |
| 992 | |
Paul Mundt | e108b2c | 2006-09-27 16:32:13 +0900 | [diff] [blame] | 993 | if (s->enable) |
| 994 | s->enable(port); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 995 | |
Paul Mundt | 005a336 | 2007-04-26 11:45:32 +0900 | [diff] [blame] | 996 | #if defined(CONFIG_SUPERH) && !defined(CONFIG_SUPERH64) |
dmitry pervushin | 1534a3b | 2007-04-24 13:41:12 +0900 | [diff] [blame] | 997 | s->clk = clk_get(NULL, "module_clk"); |
Paul Mundt | 005a336 | 2007-04-26 11:45:32 +0900 | [diff] [blame] | 998 | #endif |
dmitry pervushin | 1534a3b | 2007-04-24 13:41:12 +0900 | [diff] [blame] | 999 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1000 | sci_request_irq(s); |
Yoshinori Sato | d656901 | 2005-10-14 15:59:12 -0700 | [diff] [blame] | 1001 | sci_start_tx(port); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1002 | sci_start_rx(port, 1); |
| 1003 | |
| 1004 | return 0; |
| 1005 | } |
| 1006 | |
| 1007 | static void sci_shutdown(struct uart_port *port) |
| 1008 | { |
| 1009 | struct sci_port *s = &sci_ports[port->line]; |
| 1010 | |
| 1011 | sci_stop_rx(port); |
Russell King | b129a8c | 2005-08-31 10:12:14 +0100 | [diff] [blame] | 1012 | sci_stop_tx(port); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1013 | sci_free_irq(s); |
| 1014 | |
Paul Mundt | e108b2c | 2006-09-27 16:32:13 +0900 | [diff] [blame] | 1015 | if (s->disable) |
| 1016 | s->disable(port); |
dmitry pervushin | 1534a3b | 2007-04-24 13:41:12 +0900 | [diff] [blame] | 1017 | |
Paul Mundt | 005a336 | 2007-04-26 11:45:32 +0900 | [diff] [blame] | 1018 | #if defined(CONFIG_SUPERH) && !defined(CONFIG_SUPERH64) |
dmitry pervushin | 1534a3b | 2007-04-24 13:41:12 +0900 | [diff] [blame] | 1019 | clk_put(s->clk); |
| 1020 | s->clk = NULL; |
Paul Mundt | 005a336 | 2007-04-26 11:45:32 +0900 | [diff] [blame] | 1021 | #endif |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1022 | } |
| 1023 | |
Alan Cox | 606d099 | 2006-12-08 02:38:45 -0800 | [diff] [blame] | 1024 | static void sci_set_termios(struct uart_port *port, struct ktermios *termios, |
| 1025 | struct ktermios *old) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1026 | { |
| 1027 | struct sci_port *s = &sci_ports[port->line]; |
| 1028 | unsigned int status, baud, smr_val; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1029 | int t; |
| 1030 | |
| 1031 | baud = uart_get_baud_rate(port, termios, old, 0, port->uartclk/16); |
| 1032 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1033 | switch (baud) { |
Paul Mundt | b7a76e4 | 2006-02-01 03:06:06 -0800 | [diff] [blame] | 1034 | case 0: |
| 1035 | t = -1; |
| 1036 | break; |
| 1037 | default: |
| 1038 | { |
| 1039 | #if defined(CONFIG_SUPERH) && !defined(CONFIG_SUPERH64) |
dmitry pervushin | 1534a3b | 2007-04-24 13:41:12 +0900 | [diff] [blame] | 1040 | t = SCBRR_VALUE(baud, clk_get_rate(s->clk)); |
Paul Mundt | b7a76e4 | 2006-02-01 03:06:06 -0800 | [diff] [blame] | 1041 | #else |
| 1042 | t = SCBRR_VALUE(baud); |
| 1043 | #endif |
Paul Mundt | b7a76e4 | 2006-02-01 03:06:06 -0800 | [diff] [blame] | 1044 | break; |
Paul Mundt | fa5da2f | 2007-03-08 17:27:37 +0900 | [diff] [blame] | 1045 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1046 | } |
| 1047 | |
Paul Mundt | e108b2c | 2006-09-27 16:32:13 +0900 | [diff] [blame] | 1048 | do { |
| 1049 | status = sci_in(port, SCxSR); |
| 1050 | } while (!(status & SCxSR_TEND(port))); |
| 1051 | |
| 1052 | sci_out(port, SCSCR, 0x00); /* TE=0, RE=0, CKE1=0 */ |
| 1053 | |
| 1054 | #if !defined(SCI_ONLY) |
| 1055 | if (port->type == PORT_SCIF) |
| 1056 | sci_out(port, SCFCR, SCFCR_RFRST | SCFCR_TFRST); |
| 1057 | #endif |
| 1058 | |
| 1059 | smr_val = sci_in(port, SCSMR) & 3; |
| 1060 | if ((termios->c_cflag & CSIZE) == CS7) |
| 1061 | smr_val |= 0x40; |
| 1062 | if (termios->c_cflag & PARENB) |
| 1063 | smr_val |= 0x20; |
| 1064 | if (termios->c_cflag & PARODD) |
| 1065 | smr_val |= 0x30; |
| 1066 | if (termios->c_cflag & CSTOPB) |
| 1067 | smr_val |= 0x08; |
| 1068 | |
| 1069 | uart_update_timeout(port, termios->c_cflag, baud); |
| 1070 | |
| 1071 | sci_out(port, SCSMR, smr_val); |
| 1072 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1073 | if (t > 0) { |
| 1074 | if(t >= 256) { |
| 1075 | sci_out(port, SCSMR, (sci_in(port, SCSMR) & ~3) | 1); |
| 1076 | t >>= 2; |
| 1077 | } else { |
| 1078 | sci_out(port, SCSMR, sci_in(port, SCSMR) & ~3); |
| 1079 | } |
| 1080 | sci_out(port, SCBRR, t); |
| 1081 | udelay((1000000+(baud-1)) / baud); /* Wait one bit interval */ |
| 1082 | } |
| 1083 | |
Paul Mundt | b7a76e4 | 2006-02-01 03:06:06 -0800 | [diff] [blame] | 1084 | if (likely(s->init_pins)) |
| 1085 | s->init_pins(port, termios->c_cflag); |
| 1086 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1087 | sci_out(port, SCSCR, SCSCR_INIT(port)); |
| 1088 | |
| 1089 | if ((termios->c_cflag & CREAD) != 0) |
| 1090 | sci_start_rx(port,0); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1091 | } |
| 1092 | |
| 1093 | static const char *sci_type(struct uart_port *port) |
| 1094 | { |
| 1095 | switch (port->type) { |
| 1096 | case PORT_SCI: return "sci"; |
| 1097 | case PORT_SCIF: return "scif"; |
| 1098 | case PORT_IRDA: return "irda"; |
| 1099 | } |
| 1100 | |
| 1101 | return 0; |
| 1102 | } |
| 1103 | |
| 1104 | static void sci_release_port(struct uart_port *port) |
| 1105 | { |
| 1106 | /* Nothing here yet .. */ |
| 1107 | } |
| 1108 | |
| 1109 | static int sci_request_port(struct uart_port *port) |
| 1110 | { |
| 1111 | /* Nothing here yet .. */ |
| 1112 | return 0; |
| 1113 | } |
| 1114 | |
| 1115 | static void sci_config_port(struct uart_port *port, int flags) |
| 1116 | { |
| 1117 | struct sci_port *s = &sci_ports[port->line]; |
| 1118 | |
| 1119 | port->type = s->type; |
| 1120 | |
Paul Mundt | e108b2c | 2006-09-27 16:32:13 +0900 | [diff] [blame] | 1121 | switch (port->type) { |
| 1122 | case PORT_SCI: |
| 1123 | s->init_pins = sci_init_pins_sci; |
| 1124 | break; |
| 1125 | case PORT_SCIF: |
| 1126 | s->init_pins = sci_init_pins_scif; |
| 1127 | break; |
| 1128 | case PORT_IRDA: |
| 1129 | s->init_pins = sci_init_pins_irda; |
| 1130 | break; |
| 1131 | } |
| 1132 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1133 | #if defined(CONFIG_CPU_SUBTYPE_SH5_101) || defined(CONFIG_CPU_SUBTYPE_SH5_103) |
| 1134 | if (port->mapbase == 0) |
| 1135 | port->mapbase = onchip_remap(SCIF_ADDR_SH5, 1024, "SCIF"); |
| 1136 | |
Paul Mundt | e108b2c | 2006-09-27 16:32:13 +0900 | [diff] [blame] | 1137 | port->membase = (void __iomem *)port->mapbase; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1138 | #endif |
| 1139 | } |
| 1140 | |
| 1141 | static int sci_verify_port(struct uart_port *port, struct serial_struct *ser) |
| 1142 | { |
| 1143 | struct sci_port *s = &sci_ports[port->line]; |
| 1144 | |
| 1145 | if (ser->irq != s->irqs[SCIx_TXI_IRQ] || ser->irq > NR_IRQS) |
| 1146 | return -EINVAL; |
| 1147 | if (ser->baud_base < 2400) |
| 1148 | /* No paper tape reader for Mitch.. */ |
| 1149 | return -EINVAL; |
| 1150 | |
| 1151 | return 0; |
| 1152 | } |
| 1153 | |
| 1154 | static struct uart_ops sci_uart_ops = { |
| 1155 | .tx_empty = sci_tx_empty, |
| 1156 | .set_mctrl = sci_set_mctrl, |
| 1157 | .get_mctrl = sci_get_mctrl, |
| 1158 | .start_tx = sci_start_tx, |
| 1159 | .stop_tx = sci_stop_tx, |
| 1160 | .stop_rx = sci_stop_rx, |
| 1161 | .enable_ms = sci_enable_ms, |
| 1162 | .break_ctl = sci_break_ctl, |
| 1163 | .startup = sci_startup, |
| 1164 | .shutdown = sci_shutdown, |
| 1165 | .set_termios = sci_set_termios, |
| 1166 | .type = sci_type, |
| 1167 | .release_port = sci_release_port, |
| 1168 | .request_port = sci_request_port, |
| 1169 | .config_port = sci_config_port, |
| 1170 | .verify_port = sci_verify_port, |
| 1171 | }; |
| 1172 | |
Paul Mundt | e108b2c | 2006-09-27 16:32:13 +0900 | [diff] [blame] | 1173 | static void __init sci_init_ports(void) |
| 1174 | { |
| 1175 | static int first = 1; |
| 1176 | int i; |
| 1177 | |
| 1178 | if (!first) |
| 1179 | return; |
| 1180 | |
| 1181 | first = 0; |
| 1182 | |
| 1183 | for (i = 0; i < SCI_NPORTS; i++) { |
| 1184 | sci_ports[i].port.ops = &sci_uart_ops; |
| 1185 | sci_ports[i].port.iotype = UPIO_MEM; |
| 1186 | sci_ports[i].port.line = i; |
| 1187 | sci_ports[i].port.fifosize = 1; |
| 1188 | |
| 1189 | #if defined(__H8300H__) || defined(__H8300S__) |
| 1190 | #ifdef __H8300S__ |
| 1191 | sci_ports[i].enable = h8300_sci_enable; |
| 1192 | sci_ports[i].disable = h8300_sci_disable; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1193 | #endif |
Paul Mundt | e108b2c | 2006-09-27 16:32:13 +0900 | [diff] [blame] | 1194 | sci_ports[i].port.uartclk = CONFIG_CPU_CLOCK; |
| 1195 | #elif defined(CONFIG_SUPERH64) |
| 1196 | sci_ports[i].port.uartclk = current_cpu_data.module_clock * 16; |
| 1197 | #else |
| 1198 | /* |
| 1199 | * XXX: We should use a proper SCI/SCIF clock |
| 1200 | */ |
| 1201 | { |
Paul Mundt | 1d11856 | 2006-12-01 13:15:14 +0900 | [diff] [blame] | 1202 | struct clk *clk = clk_get(NULL, "module_clk"); |
Paul Mundt | e108b2c | 2006-09-27 16:32:13 +0900 | [diff] [blame] | 1203 | sci_ports[i].port.uartclk = clk_get_rate(clk) * 16; |
| 1204 | clk_put(clk); |
| 1205 | } |
| 1206 | #endif |
| 1207 | |
| 1208 | sci_ports[i].break_timer.data = (unsigned long)&sci_ports[i]; |
| 1209 | sci_ports[i].break_timer.function = sci_break_timer; |
| 1210 | |
| 1211 | init_timer(&sci_ports[i].break_timer); |
| 1212 | } |
| 1213 | } |
| 1214 | |
| 1215 | int __init early_sci_setup(struct uart_port *port) |
| 1216 | { |
| 1217 | if (unlikely(port->line > SCI_NPORTS)) |
| 1218 | return -ENODEV; |
| 1219 | |
| 1220 | sci_init_ports(); |
| 1221 | |
| 1222 | sci_ports[port->line].port.membase = port->membase; |
| 1223 | sci_ports[port->line].port.mapbase = port->mapbase; |
| 1224 | sci_ports[port->line].port.type = port->type; |
| 1225 | |
| 1226 | return 0; |
| 1227 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1228 | |
| 1229 | #ifdef CONFIG_SERIAL_SH_SCI_CONSOLE |
| 1230 | /* |
| 1231 | * Print a string to the serial port trying not to disturb |
| 1232 | * any possible real use of the port... |
| 1233 | */ |
| 1234 | static void serial_console_write(struct console *co, const char *s, |
| 1235 | unsigned count) |
| 1236 | { |
| 1237 | put_string(serial_console_port, s, count); |
| 1238 | } |
| 1239 | |
| 1240 | static int __init serial_console_setup(struct console *co, char *options) |
| 1241 | { |
| 1242 | struct uart_port *port; |
| 1243 | int baud = 115200; |
| 1244 | int bits = 8; |
| 1245 | int parity = 'n'; |
| 1246 | int flow = 'n'; |
| 1247 | int ret; |
| 1248 | |
Paul Mundt | e108b2c | 2006-09-27 16:32:13 +0900 | [diff] [blame] | 1249 | /* |
| 1250 | * Check whether an invalid uart number has been specified, and |
| 1251 | * if so, search for the first available port that does have |
| 1252 | * console support. |
| 1253 | */ |
| 1254 | if (co->index >= SCI_NPORTS) |
| 1255 | co->index = 0; |
| 1256 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1257 | serial_console_port = &sci_ports[co->index]; |
| 1258 | port = &serial_console_port->port; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1259 | |
| 1260 | /* |
Paul Mundt | e108b2c | 2006-09-27 16:32:13 +0900 | [diff] [blame] | 1261 | * Also need to check port->type, we don't actually have any |
| 1262 | * UPIO_PORT ports, but uart_report_port() handily misreports |
| 1263 | * it anyways if we don't have a port available by the time this is |
| 1264 | * called. |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1265 | */ |
Paul Mundt | e108b2c | 2006-09-27 16:32:13 +0900 | [diff] [blame] | 1266 | if (!port->type) |
| 1267 | return -ENODEV; |
| 1268 | if (!port->membase || !port->mapbase) |
| 1269 | return -ENODEV; |
Paul Mundt | b7a76e4 | 2006-02-01 03:06:06 -0800 | [diff] [blame] | 1270 | |
Paul Mundt | e108b2c | 2006-09-27 16:32:13 +0900 | [diff] [blame] | 1271 | port->type = serial_console_port->type; |
| 1272 | |
Paul Mundt | 005a336 | 2007-04-26 11:45:32 +0900 | [diff] [blame] | 1273 | #if defined(CONFIG_SUPERH) && !defined(CONFIG_SUPERH64) |
| 1274 | if (!serial_console_port->clk) |
| 1275 | serial_console_port->clk = clk_get(NULL, "module_clk"); |
| 1276 | #endif |
| 1277 | |
Paul Mundt | e108b2c | 2006-09-27 16:32:13 +0900 | [diff] [blame] | 1278 | if (port->flags & UPF_IOREMAP) |
| 1279 | sci_config_port(port, 0); |
| 1280 | |
| 1281 | if (serial_console_port->enable) |
| 1282 | serial_console_port->enable(port); |
| 1283 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1284 | if (options) |
| 1285 | uart_parse_options(options, &baud, &parity, &bits, &flow); |
| 1286 | |
| 1287 | ret = uart_set_options(port, co, baud, parity, bits, flow); |
| 1288 | #if defined(__H8300H__) || defined(__H8300S__) |
| 1289 | /* disable rx interrupt */ |
| 1290 | if (ret == 0) |
| 1291 | sci_stop_rx(port); |
| 1292 | #endif |
| 1293 | return ret; |
| 1294 | } |
| 1295 | |
| 1296 | static struct console serial_console = { |
| 1297 | .name = "ttySC", |
| 1298 | .device = uart_console_device, |
| 1299 | .write = serial_console_write, |
| 1300 | .setup = serial_console_setup, |
Paul Mundt | fa5da2f | 2007-03-08 17:27:37 +0900 | [diff] [blame] | 1301 | .flags = CON_PRINTBUFFER, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1302 | .index = -1, |
| 1303 | .data = &sci_uart_driver, |
| 1304 | }; |
| 1305 | |
| 1306 | static int __init sci_console_init(void) |
| 1307 | { |
Paul Mundt | e108b2c | 2006-09-27 16:32:13 +0900 | [diff] [blame] | 1308 | sci_init_ports(); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1309 | register_console(&serial_console); |
| 1310 | return 0; |
| 1311 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1312 | console_initcall(sci_console_init); |
| 1313 | #endif /* CONFIG_SERIAL_SH_SCI_CONSOLE */ |
| 1314 | |
Paul Mundt | 68362e0 | 2007-09-11 15:27:29 +0900 | [diff] [blame] | 1315 | #ifdef CONFIG_SH_KGDB_CONSOLE |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1316 | /* |
| 1317 | * FIXME: Most of this can go away.. at the moment, we rely on |
| 1318 | * arch/sh/kernel/setup.c to do the command line parsing for kgdb, though |
| 1319 | * most of that can easily be done here instead. |
| 1320 | * |
| 1321 | * For the time being, just accept the values that were parsed earlier.. |
| 1322 | */ |
| 1323 | static void __init kgdb_console_get_options(struct uart_port *port, int *baud, |
| 1324 | int *parity, int *bits) |
| 1325 | { |
| 1326 | *baud = kgdb_baud; |
| 1327 | *parity = tolower(kgdb_parity); |
| 1328 | *bits = kgdb_bits - '0'; |
| 1329 | } |
| 1330 | |
| 1331 | /* |
| 1332 | * The naming here is somewhat misleading, since kgdb_console_setup() takes |
| 1333 | * care of the early-on initialization for kgdb, regardless of whether we |
| 1334 | * actually use kgdb as a console or not. |
| 1335 | * |
| 1336 | * On the plus side, this lets us kill off the old kgdb_sci_setup() nonsense. |
| 1337 | */ |
| 1338 | int __init kgdb_console_setup(struct console *co, char *options) |
| 1339 | { |
| 1340 | struct uart_port *port = &sci_ports[kgdb_portnum].port; |
| 1341 | int baud = 38400; |
| 1342 | int bits = 8; |
| 1343 | int parity = 'n'; |
| 1344 | int flow = 'n'; |
| 1345 | |
Paul Mundt | b7a76e4 | 2006-02-01 03:06:06 -0800 | [diff] [blame] | 1346 | if (co->index != kgdb_portnum) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1347 | co->index = kgdb_portnum; |
| 1348 | |
Paul Mundt | fa5da2f | 2007-03-08 17:27:37 +0900 | [diff] [blame] | 1349 | kgdb_sci_port = &sci_ports[co->index]; |
| 1350 | port = &kgdb_sci_port->port; |
| 1351 | |
| 1352 | /* |
| 1353 | * Also need to check port->type, we don't actually have any |
| 1354 | * UPIO_PORT ports, but uart_report_port() handily misreports |
| 1355 | * it anyways if we don't have a port available by the time this is |
| 1356 | * called. |
| 1357 | */ |
| 1358 | if (!port->type) |
| 1359 | return -ENODEV; |
| 1360 | if (!port->membase || !port->mapbase) |
| 1361 | return -ENODEV; |
| 1362 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1363 | if (options) |
| 1364 | uart_parse_options(options, &baud, &parity, &bits, &flow); |
| 1365 | else |
| 1366 | kgdb_console_get_options(port, &baud, &parity, &bits); |
| 1367 | |
| 1368 | kgdb_getchar = kgdb_sci_getchar; |
| 1369 | kgdb_putchar = kgdb_sci_putchar; |
| 1370 | |
| 1371 | return uart_set_options(port, co, baud, parity, bits, flow); |
| 1372 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1373 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1374 | static struct console kgdb_console = { |
Paul Mundt | fa5da2f | 2007-03-08 17:27:37 +0900 | [diff] [blame] | 1375 | .name = "ttySC", |
| 1376 | .device = uart_console_device, |
| 1377 | .write = kgdb_console_write, |
| 1378 | .setup = kgdb_console_setup, |
| 1379 | .flags = CON_PRINTBUFFER, |
| 1380 | .index = -1, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1381 | .data = &sci_uart_driver, |
| 1382 | }; |
| 1383 | |
| 1384 | /* Register the KGDB console so we get messages (d'oh!) */ |
| 1385 | static int __init kgdb_console_init(void) |
| 1386 | { |
Paul Mundt | e108b2c | 2006-09-27 16:32:13 +0900 | [diff] [blame] | 1387 | sci_init_ports(); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1388 | register_console(&kgdb_console); |
| 1389 | return 0; |
| 1390 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1391 | console_initcall(kgdb_console_init); |
| 1392 | #endif /* CONFIG_SH_KGDB_CONSOLE */ |
| 1393 | |
| 1394 | #if defined(CONFIG_SH_KGDB_CONSOLE) |
| 1395 | #define SCI_CONSOLE &kgdb_console |
| 1396 | #elif defined(CONFIG_SERIAL_SH_SCI_CONSOLE) |
| 1397 | #define SCI_CONSOLE &serial_console |
| 1398 | #else |
Paul Mundt | b7a76e4 | 2006-02-01 03:06:06 -0800 | [diff] [blame] | 1399 | #define SCI_CONSOLE 0 |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1400 | #endif |
| 1401 | |
| 1402 | static char banner[] __initdata = |
| 1403 | KERN_INFO "SuperH SCI(F) driver initialized\n"; |
| 1404 | |
| 1405 | static struct uart_driver sci_uart_driver = { |
| 1406 | .owner = THIS_MODULE, |
| 1407 | .driver_name = "sci", |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1408 | .dev_name = "ttySC", |
| 1409 | .major = SCI_MAJOR, |
| 1410 | .minor = SCI_MINOR_START, |
Paul Mundt | e108b2c | 2006-09-27 16:32:13 +0900 | [diff] [blame] | 1411 | .nr = SCI_NPORTS, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1412 | .cons = SCI_CONSOLE, |
| 1413 | }; |
| 1414 | |
Paul Mundt | e108b2c | 2006-09-27 16:32:13 +0900 | [diff] [blame] | 1415 | /* |
| 1416 | * Register a set of serial devices attached to a platform device. The |
| 1417 | * list is terminated with a zero flags entry, which means we expect |
| 1418 | * all entries to have at least UPF_BOOT_AUTOCONF set. Platforms that need |
| 1419 | * remapping (such as sh64) should also set UPF_IOREMAP. |
| 1420 | */ |
| 1421 | static int __devinit sci_probe(struct platform_device *dev) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1422 | { |
Paul Mundt | e108b2c | 2006-09-27 16:32:13 +0900 | [diff] [blame] | 1423 | struct plat_sci_port *p = dev->dev.platform_data; |
| 1424 | int i; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1425 | |
Paul Mundt | 32351a2 | 2007-03-12 14:38:59 +0900 | [diff] [blame] | 1426 | for (i = 0; p && p->flags != 0; p++, i++) { |
Paul Mundt | e108b2c | 2006-09-27 16:32:13 +0900 | [diff] [blame] | 1427 | struct sci_port *sciport = &sci_ports[i]; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1428 | |
Paul Mundt | 32351a2 | 2007-03-12 14:38:59 +0900 | [diff] [blame] | 1429 | /* Sanity check */ |
| 1430 | if (unlikely(i == SCI_NPORTS)) { |
| 1431 | dev_notice(&dev->dev, "Attempting to register port " |
| 1432 | "%d when only %d are available.\n", |
| 1433 | i+1, SCI_NPORTS); |
| 1434 | dev_notice(&dev->dev, "Consider bumping " |
| 1435 | "CONFIG_SERIAL_SH_SCI_NR_UARTS!\n"); |
| 1436 | break; |
| 1437 | } |
| 1438 | |
Paul Mundt | e108b2c | 2006-09-27 16:32:13 +0900 | [diff] [blame] | 1439 | sciport->port.mapbase = p->mapbase; |
Paul Mundt | b7a76e4 | 2006-02-01 03:06:06 -0800 | [diff] [blame] | 1440 | |
Paul Mundt | e108b2c | 2006-09-27 16:32:13 +0900 | [diff] [blame] | 1441 | /* |
| 1442 | * For the simple (and majority of) cases where we don't need |
| 1443 | * to do any remapping, just cast the cookie directly. |
| 1444 | */ |
| 1445 | if (p->mapbase && !p->membase && !(p->flags & UPF_IOREMAP)) |
| 1446 | p->membase = (void __iomem *)p->mapbase; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1447 | |
Paul Mundt | e108b2c | 2006-09-27 16:32:13 +0900 | [diff] [blame] | 1448 | sciport->port.membase = p->membase; |
| 1449 | |
| 1450 | sciport->port.irq = p->irqs[SCIx_TXI_IRQ]; |
| 1451 | sciport->port.flags = p->flags; |
| 1452 | sciport->port.dev = &dev->dev; |
| 1453 | |
| 1454 | sciport->type = sciport->port.type = p->type; |
| 1455 | |
| 1456 | memcpy(&sciport->irqs, &p->irqs, sizeof(p->irqs)); |
| 1457 | |
| 1458 | uart_add_one_port(&sci_uart_driver, &sciport->port); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1459 | } |
| 1460 | |
Paul Mundt | fa5da2f | 2007-03-08 17:27:37 +0900 | [diff] [blame] | 1461 | #if defined(CONFIG_SH_KGDB) && !defined(CONFIG_SH_KGDB_CONSOLE) |
| 1462 | kgdb_sci_port = &sci_ports[kgdb_portnum]; |
| 1463 | kgdb_getchar = kgdb_sci_getchar; |
| 1464 | kgdb_putchar = kgdb_sci_putchar; |
| 1465 | #endif |
| 1466 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1467 | #ifdef CONFIG_CPU_FREQ |
| 1468 | cpufreq_register_notifier(&sci_nb, CPUFREQ_TRANSITION_NOTIFIER); |
Paul Mundt | e289fd9 | 2007-08-08 18:09:13 +0900 | [diff] [blame] | 1469 | dev_info(&dev->dev, "CPU frequency notifier registered\n"); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1470 | #endif |
| 1471 | |
| 1472 | #ifdef CONFIG_SH_STANDARD_BIOS |
| 1473 | sh_bios_gdb_detach(); |
| 1474 | #endif |
| 1475 | |
Paul Mundt | e108b2c | 2006-09-27 16:32:13 +0900 | [diff] [blame] | 1476 | return 0; |
| 1477 | } |
| 1478 | |
| 1479 | static int __devexit sci_remove(struct platform_device *dev) |
| 1480 | { |
| 1481 | int i; |
| 1482 | |
| 1483 | for (i = 0; i < SCI_NPORTS; i++) |
| 1484 | uart_remove_one_port(&sci_uart_driver, &sci_ports[i].port); |
| 1485 | |
| 1486 | return 0; |
| 1487 | } |
| 1488 | |
| 1489 | static int sci_suspend(struct platform_device *dev, pm_message_t state) |
| 1490 | { |
| 1491 | int i; |
| 1492 | |
| 1493 | for (i = 0; i < SCI_NPORTS; i++) { |
| 1494 | struct sci_port *p = &sci_ports[i]; |
| 1495 | |
| 1496 | if (p->type != PORT_UNKNOWN && p->port.dev == &dev->dev) |
| 1497 | uart_suspend_port(&sci_uart_driver, &p->port); |
| 1498 | } |
| 1499 | |
| 1500 | return 0; |
| 1501 | } |
| 1502 | |
| 1503 | static int sci_resume(struct platform_device *dev) |
| 1504 | { |
| 1505 | int i; |
| 1506 | |
| 1507 | for (i = 0; i < SCI_NPORTS; i++) { |
| 1508 | struct sci_port *p = &sci_ports[i]; |
| 1509 | |
| 1510 | if (p->type != PORT_UNKNOWN && p->port.dev == &dev->dev) |
| 1511 | uart_resume_port(&sci_uart_driver, &p->port); |
| 1512 | } |
| 1513 | |
| 1514 | return 0; |
| 1515 | } |
| 1516 | |
| 1517 | static struct platform_driver sci_driver = { |
| 1518 | .probe = sci_probe, |
| 1519 | .remove = __devexit_p(sci_remove), |
| 1520 | .suspend = sci_suspend, |
| 1521 | .resume = sci_resume, |
| 1522 | .driver = { |
| 1523 | .name = "sh-sci", |
| 1524 | .owner = THIS_MODULE, |
| 1525 | }, |
| 1526 | }; |
| 1527 | |
| 1528 | static int __init sci_init(void) |
| 1529 | { |
| 1530 | int ret; |
| 1531 | |
| 1532 | printk(banner); |
| 1533 | |
| 1534 | sci_init_ports(); |
| 1535 | |
| 1536 | ret = uart_register_driver(&sci_uart_driver); |
| 1537 | if (likely(ret == 0)) { |
| 1538 | ret = platform_driver_register(&sci_driver); |
| 1539 | if (unlikely(ret)) |
| 1540 | uart_unregister_driver(&sci_uart_driver); |
| 1541 | } |
| 1542 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1543 | return ret; |
| 1544 | } |
| 1545 | |
| 1546 | static void __exit sci_exit(void) |
| 1547 | { |
Paul Mundt | e108b2c | 2006-09-27 16:32:13 +0900 | [diff] [blame] | 1548 | platform_driver_unregister(&sci_driver); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1549 | uart_unregister_driver(&sci_uart_driver); |
| 1550 | } |
| 1551 | |
| 1552 | module_init(sci_init); |
| 1553 | module_exit(sci_exit); |
| 1554 | |
Paul Mundt | e108b2c | 2006-09-27 16:32:13 +0900 | [diff] [blame] | 1555 | MODULE_LICENSE("GPL"); |
Kay Sievers | e169c13 | 2008-04-15 14:34:35 -0700 | [diff] [blame] | 1556 | MODULE_ALIAS("platform:sh-sci"); |