Mercurial > flash_v2
annotate packages/io/serial/current/src/common/tty.c @ 1035:f81e485de35c
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| author | gthomas |
|---|---|
| date | Wed, 21 May 2003 16:31:22 +0000 |
| parents | 2842412ce230 |
| children | ecbb5d87bfe0 |
| rev | line source |
|---|---|
| 2 | 1 //========================================================================== |
| 2 // | |
| 3 // io/serial/common/tty.c | |
| 4 // | |
| 5 // TTY (terminal-like interface) I/O driver | |
| 6 // | |
| 7 //========================================================================== | |
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8 //####ECOSGPLCOPYRIGHTBEGIN#### |
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9 // ------------------------------------------- |
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10 // This file is part of eCos, the Embedded Configurable Operating System. |
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11 // Copyright (C) 1998, 1999, 2000, 2001, 2002 Red Hat, Inc. |
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12 // |
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13 // eCos is free software; you can redistribute it and/or modify it under |
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14 // the terms of the GNU General Public License as published by the Free |
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15 // Software Foundation; either version 2 or (at your option) any later version. |
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16 // |
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17 // eCos is distributed in the hope that it will be useful, but WITHOUT ANY |
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18 // WARRANTY; without even the implied warranty of MERCHANTABILITY or |
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19 // FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License |
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20 // for more details. |
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21 // |
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22 // You should have received a copy of the GNU General Public License along |
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23 // with eCos; if not, write to the Free Software Foundation, Inc., |
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24 // 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA. |
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25 // |
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26 // As a special exception, if other files instantiate templates or use macros |
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27 // or inline functions from this file, or you compile this file and link it |
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28 // with other works to produce a work based on this file, this file does not |
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29 // by itself cause the resulting work to be covered by the GNU General Public |
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30 // License. However the source code for this file must still be made available |
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31 // in accordance with section (3) of the GNU General Public License. |
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32 // |
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33 // This exception does not invalidate any other reasons why a work based on |
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34 // this file might be covered by the GNU General Public License. |
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35 // |
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36 // Alternative licenses for eCos may be arranged by contacting Red Hat, Inc. |
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37 // at http://sources.redhat.com/ecos/ecos-license/ |
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38 // ------------------------------------------- |
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39 //####ECOSGPLCOPYRIGHTEND#### |
| 2 | 40 //========================================================================== |
| 41 //#####DESCRIPTIONBEGIN#### | |
| 42 // | |
| 43 // Author(s): gthomas | |
| 44 // Contributors: gthomas | |
| 45 // Date: 1999-02-04 | |
| 46 // Purpose: Device driver for tty I/O, layered on top of serial I/O | |
| 47 // Description: | |
| 48 // | |
| 49 //####DESCRIPTIONEND#### | |
| 50 // | |
| 51 //========================================================================== | |
| 52 | |
| 53 #include <pkgconf/io.h> | |
| 54 #include <pkgconf/io_serial.h> | |
| 55 #ifdef CYGPKG_IO_SERIAL_TTY | |
| 56 #include <cyg/io/io.h> | |
| 57 #include <cyg/io/devtab.h> | |
| 58 #include <cyg/io/ttyio.h> | |
| 59 #include <cyg/infra/diag.h> | |
| 60 | |
| 61 static bool tty_init(struct cyg_devtab_entry *tab); | |
| 62 static Cyg_ErrNo tty_lookup(struct cyg_devtab_entry **tab, | |
| 63 struct cyg_devtab_entry *sub_tab, | |
| 64 const char *name); | |
| 65 static Cyg_ErrNo tty_write(cyg_io_handle_t handle, const void *buf, cyg_uint32 *len); | |
| 66 static Cyg_ErrNo tty_read(cyg_io_handle_t handle, void *buf, cyg_uint32 *len); | |
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67 static Cyg_ErrNo tty_select(cyg_io_handle_t handle, cyg_uint32 which, CYG_ADDRWORD info); |
| 2 | 68 static Cyg_ErrNo tty_get_config(cyg_io_handle_t handle, cyg_uint32 key, void *buf, cyg_uint32 *len); |
| 69 static Cyg_ErrNo tty_set_config(cyg_io_handle_t handle, cyg_uint32 key, const void *buf, cyg_uint32 *len); | |
| 70 | |
| 71 struct tty_private_info { | |
| 72 cyg_tty_info_t dev_info; | |
| 73 cyg_io_handle_t dev_handle; | |
| 74 }; | |
| 75 | |
| 76 static DEVIO_TABLE(tty_devio, | |
| 77 tty_write, | |
| 78 tty_read, | |
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79 tty_select, |
| 2 | 80 tty_get_config, |
| 81 tty_set_config | |
| 82 ); | |
| 83 | |
| 84 #ifdef CYGPKG_IO_SERIAL_TTY_TTYDIAG | |
| 85 static struct tty_private_info tty_private_info_diag; | |
| 86 DEVTAB_ENTRY(tty_io_diag, | |
| 87 // "/dev/console", | |
| 88 // CYGDAT_IO_SERIAL_TTY_CONSOLE, // Based on driver for this device | |
| 89 "/dev/ttydiag", | |
| 90 "/dev/haldiag", | |
| 91 &tty_devio, | |
| 92 tty_init, | |
| 93 tty_lookup, // Execute this when device is being looked up | |
| 94 &tty_private_info_diag); | |
| 95 #endif | |
| 96 | |
| 97 #ifdef CYGPKG_IO_SERIAL_TTY_TTY0 | |
| 98 static struct tty_private_info tty_private_info0; | |
| 99 DEVTAB_ENTRY(tty_io0, | |
| 100 "/dev/tty0", | |
| 101 CYGDAT_IO_SERIAL_TTY_TTY0_DEV, | |
| 102 &tty_devio, | |
| 103 tty_init, | |
| 104 tty_lookup, // Execute this when device is being looked up | |
| 105 &tty_private_info0); | |
| 106 #endif | |
| 107 | |
| 108 #ifdef CYGPKG_IO_SERIAL_TTY_TTY1 | |
| 109 static struct tty_private_info tty_private_info1; | |
| 110 DEVTAB_ENTRY(tty_io1, | |
| 111 "/dev/tty1", | |
| 112 CYGDAT_IO_SERIAL_TTY_TTY1_DEV, | |
| 113 &tty_devio, | |
| 114 tty_init, | |
| 115 tty_lookup, // Execute this when device is being looked up | |
| 116 &tty_private_info1); | |
| 117 #endif | |
| 118 | |
| 119 #ifdef CYGPKG_IO_SERIAL_TTY_TTY2 | |
| 120 static struct tty_private_info tty_private_info2; | |
| 121 DEVTAB_ENTRY(tty_io2, | |
| 122 "/dev/tty2", | |
| 123 CYGDAT_IO_SERIAL_TTY_TTY2_DEV, | |
| 124 &tty_devio, | |
| 125 tty_init, | |
| 126 tty_lookup, // Execute this when device is being looked up | |
| 127 &tty_private_info2); | |
| 128 #endif | |
| 129 | |
| 130 static bool | |
| 131 tty_init(struct cyg_devtab_entry *tab) | |
| 132 { | |
| 133 struct tty_private_info *priv = (struct tty_private_info *)tab->priv; | |
| 134 #ifdef CYGDBG_IO_INIT | |
| 135 diag_printf("Init tty channel: %x\n", tab); | |
| 136 #endif | |
| 137 priv->dev_info.tty_out_flags = CYG_TTY_OUT_FLAGS_DEFAULT; | |
| 138 priv->dev_info.tty_in_flags = CYG_TTY_IN_FLAGS_DEFAULT; | |
| 139 return true; | |
| 140 } | |
| 141 | |
| 142 static Cyg_ErrNo | |
| 143 tty_lookup(struct cyg_devtab_entry **tab, | |
| 144 struct cyg_devtab_entry *sub_tab, | |
| 145 const char *name) | |
| 146 { | |
| 147 cyg_io_handle_t chan = (cyg_io_handle_t)sub_tab; | |
| 148 struct tty_private_info *priv = (struct tty_private_info *)(*tab)->priv; | |
| 149 #if 0 | |
| 150 cyg_int32 len; | |
| 151 #endif | |
| 152 priv->dev_handle = chan; | |
| 153 #if 0 | |
| 154 len = sizeof(cyg_serial_info_t); | |
| 155 // Initialize configuration | |
| 156 cyg_io_get_config(chan, CYG_SERIAL_GET_CONFIG, | |
| 157 (void *)&priv->dev_info.serial_config, &len); | |
| 158 #endif | |
| 159 return ENOERR; | |
| 160 } | |
| 161 | |
| 162 #define BUFSIZE 64 | |
| 163 | |
| 164 static Cyg_ErrNo | |
| 165 tty_write(cyg_io_handle_t handle, const void *_buf, cyg_uint32 *len) | |
| 166 { | |
| 167 cyg_devtab_entry_t *t = (cyg_devtab_entry_t *)handle; | |
| 168 struct tty_private_info *priv = (struct tty_private_info *)t->priv; | |
| 169 cyg_io_handle_t chan = (cyg_io_handle_t)priv->dev_handle; | |
| 170 cyg_int32 size, bytes_successful, actually_written; | |
| 171 cyg_uint8 xbuf[BUFSIZE]; | |
| 172 cyg_uint8 c; | |
| 173 cyg_uint8 *buf = (cyg_uint8 *)_buf; | |
| 174 Cyg_ErrNo res = -EBADF; | |
| 175 // assert(chan) | |
| 176 size = 0; | |
| 177 bytes_successful = 0; | |
| 178 actually_written = 0; | |
| 179 while (bytes_successful++ < *len) { | |
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180 c = *buf++; |
| 2 | 181 if ((c == '\n') && |
| 182 (priv->dev_info.tty_out_flags & CYG_TTY_OUT_FLAGS_CRLF)) { | |
| 183 xbuf[size++] = '\r'; | |
| 184 } | |
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185 xbuf[size++] = c; |
| 2 | 186 // Always leave room for possible CR/LF expansion |
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187 if ((size >= (BUFSIZE-1)) || |
| 2 | 188 (bytes_successful == *len)) { |
| 189 res = cyg_io_write(chan, xbuf, &size); | |
| 190 if (res != ENOERR) { | |
| 191 *len = actually_written; | |
| 192 return res; | |
| 193 } | |
| 194 actually_written += size; | |
| 195 size = 0; | |
| 196 } | |
| 197 } | |
| 198 return res; | |
| 199 } | |
| 200 | |
| 201 static Cyg_ErrNo | |
| 202 tty_read(cyg_io_handle_t handle, void *_buf, cyg_uint32 *len) | |
| 203 { | |
| 204 cyg_devtab_entry_t *t = (cyg_devtab_entry_t *)handle; | |
| 205 struct tty_private_info *priv = (struct tty_private_info *)t->priv; | |
| 206 cyg_io_handle_t chan = (cyg_io_handle_t)priv->dev_handle; | |
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207 cyg_uint32 clen; |
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208 cyg_int32 size; |
| 2 | 209 Cyg_ErrNo res; |
| 210 cyg_uint8 c; | |
| 211 cyg_uint8 *buf = (cyg_uint8 *)_buf; | |
| 212 // assert(chan) | |
| 213 size = 0; | |
| 214 while (size < *len) { | |
| 215 clen = 1; | |
| 216 res = cyg_io_read(chan, &c, &clen); | |
| 217 if (res != ENOERR) { | |
| 218 *len = size; | |
| 219 return res; | |
| 220 } | |
| 221 buf[size++] = c; | |
| 222 if ((priv->dev_info.tty_in_flags & CYG_TTY_IN_FLAGS_BINARY) == 0) { | |
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223 switch (c) { |
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224 case '\b': /* drop through */ |
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225 case 0x7f: |
| 2 | 226 size -= 2; // erase one character + 'backspace' char |
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227 if (size < 0) { |
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228 size = 0; |
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229 } else if (priv->dev_info.tty_in_flags & CYG_TTY_IN_FLAGS_ECHO) { |
| 2 | 230 clen = 3; |
| 231 cyg_io_write(chan, "\b \b", &clen); | |
| 232 } | |
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233 break; |
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234 case '\r': |
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235 if (priv->dev_info.tty_in_flags & CYG_TTY_IN_FLAGS_CRLF) { |
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236 /* Don't do anything because a '\n' will come next */ |
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237 break; |
| 2 | 238 } |
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239 if (priv->dev_info.tty_in_flags & CYG_TTY_IN_FLAGS_CR) { |
| 2 | 240 c = '\n'; // Map CR -> LF |
| 241 } | |
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242 /* drop through */ |
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243 case '\n': |
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244 if (priv->dev_info.tty_in_flags & CYG_TTY_IN_FLAGS_ECHO) { |
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245 if (priv->dev_info.tty_out_flags & CYG_TTY_OUT_FLAGS_CRLF) { |
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246 clen = 2; |
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247 cyg_io_write(chan, "\r\n", &clen); |
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248 } else { |
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249 clen = 1; |
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250 cyg_io_write(chan, &c, &clen); |
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251 } |
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252 } |
| 2 | 253 buf[size-1] = c; |
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254 *len = size; |
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255 return ENOERR; |
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256 default: |
| 2 | 257 if (priv->dev_info.tty_in_flags & CYG_TTY_IN_FLAGS_ECHO) { |
| 258 clen = 1; | |
| 259 cyg_io_write(chan, &c, &clen); | |
| 260 } | |
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261 break; |
| 2 | 262 } |
| 263 } | |
| 264 } | |
| 265 *len = size; | |
| 266 return ENOERR; | |
| 267 } | |
| 268 | |
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269 static cyg_bool |
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270 tty_select(cyg_io_handle_t handle, cyg_uint32 which, CYG_ADDRWORD info) |
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271 { |
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272 cyg_devtab_entry_t *t = (cyg_devtab_entry_t *)handle; |
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273 struct tty_private_info *priv = (struct tty_private_info *)t->priv; |
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274 cyg_io_handle_t chan = (cyg_io_handle_t)priv->dev_handle; |
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275 |
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276 // Just pass it on to next driver level |
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277 return cyg_io_select( chan, which, info ); |
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278 } |
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279 |
| 2 | 280 static Cyg_ErrNo |
| 281 tty_get_config(cyg_io_handle_t handle, cyg_uint32 key, void *buf, cyg_uint32 *len) | |
| 282 { | |
| 283 cyg_devtab_entry_t *t = (cyg_devtab_entry_t *)handle; | |
| 284 struct tty_private_info *priv = (struct tty_private_info *)t->priv; | |
| 285 cyg_io_handle_t chan = (cyg_io_handle_t)priv->dev_handle; | |
| 286 Cyg_ErrNo res = ENOERR; | |
| 287 #if 0 | |
| 288 cyg_int32 current_len; | |
| 289 #endif | |
| 290 // assert(chan) | |
| 291 switch (key) { | |
| 292 case CYG_IO_GET_CONFIG_TTY_INFO: | |
| 293 if (*len < sizeof(cyg_tty_info_t)) { | |
| 294 return -EINVAL; | |
| 295 } | |
| 296 #if 0 | |
| 297 current_len = sizeof(cyg_serial_info_t); | |
| 298 res = cyg_io_get_config(chan, CYG_SERIAL_GET_CONFIG, | |
| 299 (void *)&priv->dev_info.serial_config, ¤t_len); | |
| 300 if (res != ENOERR) { | |
| 301 return res; | |
| 302 } | |
| 303 #endif | |
| 304 *(cyg_tty_info_t *)buf = priv->dev_info; | |
| 305 *len = sizeof(cyg_tty_info_t); | |
| 306 break; | |
| 307 default: // Assume this is a 'serial' driver control | |
| 308 res = cyg_io_get_config(chan, key, buf, len); | |
| 309 } | |
| 310 return res; | |
| 311 } | |
| 312 | |
| 313 static Cyg_ErrNo | |
| 314 tty_set_config(cyg_io_handle_t handle, cyg_uint32 key, const void *buf, cyg_uint32 *len) | |
| 315 { | |
| 316 cyg_devtab_entry_t *t = (cyg_devtab_entry_t *)handle; | |
| 317 struct tty_private_info *priv = (struct tty_private_info *)t->priv; | |
| 318 cyg_io_handle_t chan = (cyg_io_handle_t)priv->dev_handle; | |
| 319 #if 0 | |
| 320 cyg_int32 current_len; | |
| 321 #endif | |
| 322 Cyg_ErrNo res = ENOERR; | |
| 323 // assert(chan) | |
| 324 switch (key) { | |
| 325 case CYG_IO_SET_CONFIG_TTY_INFO: | |
| 326 if (*len != sizeof(cyg_tty_info_t)) { | |
| 327 return -EINVAL; | |
| 328 } | |
| 329 priv->dev_info = *(cyg_tty_info_t *)buf; | |
| 330 break; | |
| 331 default: // Pass on to serial driver | |
| 332 res = cyg_io_set_config(chan, key, buf, len); | |
| 333 } | |
| 334 return res; | |
| 335 } | |
| 336 #endif // CYGPKG_IO_SERIAL_TTY |