David Kiliani | 3fedd14 | 2008-11-01 00:39:12 +0100 | [diff] [blame] | 1 | /** |
| 2 | * @file me8255.c |
| 3 | * |
| 4 | * @brief 8255 subdevice instance. |
| 5 | * @note Copyright (C) 2007 Meilhaus Electronic GmbH (support@meilhaus.de) |
| 6 | * @author Guenter Gebhardt |
| 7 | */ |
| 8 | |
| 9 | /* |
| 10 | * Copyright (C) 2007 Meilhaus Electronic GmbH (support@meilhaus.de) |
| 11 | * |
| 12 | * This file is free software; you can redistribute it and/or modify |
| 13 | * it under the terms of the GNU General Public License as published by |
| 14 | * the Free Software Foundation; either version 2 of the License, or |
| 15 | * (at your option) any later version. |
| 16 | * |
| 17 | * This program is distributed in the hope that it will be useful, |
| 18 | * but WITHOUT ANY WARRANTY; without even the implied warranty of |
| 19 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
| 20 | * GNU General Public License for more details. |
| 21 | * |
| 22 | * You should have received a copy of the GNU General Public License |
| 23 | * along with this program; if not, write to the Free Software |
| 24 | * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. |
| 25 | */ |
| 26 | |
| 27 | #ifndef __KERNEL__ |
| 28 | # define __KERNEL__ |
| 29 | #endif |
| 30 | |
| 31 | /* |
| 32 | * Includes |
| 33 | */ |
| 34 | #include <linux/module.h> |
| 35 | |
| 36 | #include <linux/slab.h> |
| 37 | #include <linux/spinlock.h> |
| 38 | #include <asm/io.h> |
| 39 | #include <linux/types.h> |
| 40 | |
| 41 | #include "medefines.h" |
| 42 | #include "meinternal.h" |
| 43 | #include "meerror.h" |
| 44 | #include "medebug.h" |
| 45 | |
| 46 | #include "me8255_reg.h" |
| 47 | #include "me8255.h" |
| 48 | |
| 49 | /* |
| 50 | * Defines |
| 51 | */ |
| 52 | |
| 53 | /* |
| 54 | * Functions |
| 55 | */ |
| 56 | |
| 57 | static uint8_t get_mode_from_mirror(uint32_t mirror) |
| 58 | { |
| 59 | PDEBUG("executed.\n"); |
| 60 | |
| 61 | if (mirror & ME8255_PORT_0_OUTPUT) { |
| 62 | if (mirror & ME8255_PORT_1_OUTPUT) { |
| 63 | if (mirror & ME8255_PORT_2_OUTPUT) { |
| 64 | return ME8255_MODE_OOO; |
| 65 | } else { |
| 66 | return ME8255_MODE_IOO; |
| 67 | } |
| 68 | } else { |
| 69 | if (mirror & ME8255_PORT_2_OUTPUT) { |
| 70 | return ME8255_MODE_OIO; |
| 71 | } else { |
| 72 | return ME8255_MODE_IIO; |
| 73 | } |
| 74 | } |
| 75 | } else { |
| 76 | if (mirror & ME8255_PORT_1_OUTPUT) { |
| 77 | if (mirror & ME8255_PORT_2_OUTPUT) { |
| 78 | return ME8255_MODE_OOI; |
| 79 | } else { |
| 80 | return ME8255_MODE_IOI; |
| 81 | } |
| 82 | } else { |
| 83 | if (mirror & ME8255_PORT_2_OUTPUT) { |
| 84 | return ME8255_MODE_OII; |
| 85 | } else { |
| 86 | return ME8255_MODE_III; |
| 87 | } |
| 88 | } |
| 89 | } |
| 90 | } |
| 91 | |
| 92 | static int me8255_io_reset_subdevice(struct me_subdevice *subdevice, |
| 93 | struct file *filep, int flags) |
| 94 | { |
| 95 | me8255_subdevice_t *instance; |
| 96 | |
| 97 | PDEBUG("executed.\n"); |
| 98 | |
| 99 | instance = (me8255_subdevice_t *) subdevice; |
| 100 | |
| 101 | if (flags) { |
| 102 | PERROR("Invalid flag specified.\n"); |
| 103 | return ME_ERRNO_INVALID_FLAGS; |
| 104 | } |
| 105 | |
| 106 | ME_SUBDEVICE_ENTER; |
| 107 | |
| 108 | spin_lock(&instance->subdevice_lock); |
| 109 | spin_lock(instance->ctrl_reg_lock); |
| 110 | *instance->ctrl_reg_mirror &= |
| 111 | ~(ME8255_PORT_0_OUTPUT << instance->dio_idx); |
| 112 | outb(get_mode_from_mirror(*instance->ctrl_reg_mirror), |
| 113 | instance->ctrl_reg); |
| 114 | spin_unlock(instance->ctrl_reg_lock); |
| 115 | |
| 116 | outb(0, instance->port_reg); |
| 117 | spin_unlock(&instance->subdevice_lock); |
| 118 | |
| 119 | ME_SUBDEVICE_EXIT; |
| 120 | |
| 121 | return ME_ERRNO_SUCCESS; |
| 122 | } |
| 123 | |
| 124 | static int me8255_io_single_config(struct me_subdevice *subdevice, |
| 125 | struct file *filep, |
| 126 | int channel, |
| 127 | int single_config, |
| 128 | int ref, |
| 129 | int trig_chan, |
| 130 | int trig_type, int trig_edge, int flags) |
| 131 | { |
| 132 | me8255_subdevice_t *instance; |
| 133 | int err = ME_ERRNO_SUCCESS; |
| 134 | |
| 135 | PDEBUG("executed.\n"); |
| 136 | |
| 137 | instance = (me8255_subdevice_t *) subdevice; |
| 138 | |
| 139 | if (flags & ~ME_IO_SINGLE_CONFIG_DIO_BYTE) { |
| 140 | PERROR("Invalid flag specified.\n"); |
| 141 | return ME_ERRNO_INVALID_FLAGS; |
| 142 | } |
| 143 | |
| 144 | if (channel) { |
| 145 | PERROR("Invalid channel.\n"); |
| 146 | return ME_ERRNO_INVALID_CHANNEL; |
| 147 | } |
| 148 | |
| 149 | ME_SUBDEVICE_ENTER; |
| 150 | |
| 151 | spin_lock(&instance->subdevice_lock); |
| 152 | if (single_config == ME_SINGLE_CONFIG_DIO_INPUT) { |
| 153 | spin_lock(instance->ctrl_reg_lock); |
| 154 | *instance->ctrl_reg_mirror &= |
| 155 | ~(ME8255_PORT_0_OUTPUT << instance->dio_idx); |
| 156 | outb(get_mode_from_mirror(*instance->ctrl_reg_mirror), |
| 157 | instance->ctrl_reg); |
| 158 | spin_unlock(instance->ctrl_reg_lock); |
| 159 | } else if (single_config == ME_SINGLE_CONFIG_DIO_OUTPUT) { |
| 160 | spin_lock(instance->ctrl_reg_lock); |
| 161 | *instance->ctrl_reg_mirror |= |
| 162 | (ME8255_PORT_0_OUTPUT << instance->dio_idx); |
| 163 | outb(get_mode_from_mirror(*instance->ctrl_reg_mirror), |
| 164 | instance->ctrl_reg); |
| 165 | spin_unlock(instance->ctrl_reg_lock); |
| 166 | } else { |
| 167 | PERROR("Invalid port direction.\n"); |
| 168 | err = ME_ERRNO_INVALID_SINGLE_CONFIG; |
| 169 | } |
| 170 | spin_unlock(&instance->subdevice_lock); |
| 171 | |
| 172 | ME_SUBDEVICE_EXIT; |
| 173 | |
| 174 | return err; |
| 175 | } |
| 176 | |
| 177 | static int me8255_io_single_read(struct me_subdevice *subdevice, |
| 178 | struct file *filep, |
| 179 | int channel, |
| 180 | int *value, int time_out, int flags) |
| 181 | { |
| 182 | me8255_subdevice_t *instance; |
| 183 | int err = ME_ERRNO_SUCCESS; |
| 184 | |
| 185 | PDEBUG("executed.\n"); |
| 186 | |
| 187 | instance = (me8255_subdevice_t *) subdevice; |
| 188 | |
| 189 | ME_SUBDEVICE_ENTER; |
| 190 | |
| 191 | spin_lock(&instance->subdevice_lock); |
| 192 | switch (flags) { |
| 193 | case ME_IO_SINGLE_TYPE_DIO_BIT: |
| 194 | if ((channel >= 0) && (channel < 8)) { |
| 195 | *value = inb(instance->port_reg) & (0x1 << channel); |
| 196 | } else { |
| 197 | PERROR("Invalid bit number.\n"); |
| 198 | err = ME_ERRNO_INVALID_CHANNEL; |
| 199 | } |
| 200 | break; |
| 201 | |
| 202 | case ME_IO_SINGLE_NO_FLAGS: |
| 203 | case ME_IO_SINGLE_TYPE_DIO_BYTE: |
| 204 | if (channel == 0) { |
| 205 | *value = inb(instance->port_reg); |
| 206 | } else { |
| 207 | PERROR("Invalid byte number.\n"); |
| 208 | err = ME_ERRNO_INVALID_CHANNEL; |
| 209 | } |
| 210 | break; |
| 211 | |
| 212 | default: |
| 213 | PERROR("Invalid flags specified.\n"); |
| 214 | err = ME_ERRNO_INVALID_FLAGS; |
| 215 | } |
| 216 | spin_unlock(&instance->subdevice_lock); |
| 217 | |
| 218 | ME_SUBDEVICE_EXIT; |
| 219 | |
| 220 | return err; |
| 221 | } |
| 222 | |
| 223 | static int me8255_io_single_write(struct me_subdevice *subdevice, |
| 224 | struct file *filep, |
| 225 | int channel, |
| 226 | int value, int time_out, int flags) |
| 227 | { |
| 228 | me8255_subdevice_t *instance; |
| 229 | uint8_t byte; |
| 230 | int err = ME_ERRNO_SUCCESS; |
| 231 | |
| 232 | PDEBUG("executed.\n"); |
| 233 | |
| 234 | instance = (me8255_subdevice_t *) subdevice; |
| 235 | |
| 236 | ME_SUBDEVICE_ENTER; |
| 237 | |
| 238 | spin_lock(&instance->subdevice_lock); |
| 239 | switch (flags) { |
| 240 | case ME_IO_SINGLE_TYPE_DIO_BIT: |
| 241 | if ((channel >= 0) && (channel < 8)) { |
| 242 | if (*instance-> |
| 243 | ctrl_reg_mirror & (ME8255_PORT_0_OUTPUT << |
| 244 | instance->dio_idx)) { |
| 245 | byte = inb(instance->port_reg); |
| 246 | |
| 247 | if (value) |
| 248 | byte |= 0x1 << channel; |
| 249 | else |
| 250 | byte &= ~(0x1 << channel); |
| 251 | |
| 252 | outb(byte, instance->port_reg); |
| 253 | } else { |
| 254 | PERROR("Port not in output mode.\n"); |
| 255 | err = ME_ERRNO_PREVIOUS_CONFIG; |
| 256 | } |
| 257 | } else { |
| 258 | PERROR("Invalid bit number.\n"); |
| 259 | err = ME_ERRNO_INVALID_CHANNEL; |
| 260 | } |
| 261 | break; |
| 262 | |
| 263 | case ME_IO_SINGLE_NO_FLAGS: |
| 264 | case ME_IO_SINGLE_TYPE_DIO_BYTE: |
| 265 | if (channel == 0) { |
| 266 | if (*instance-> |
| 267 | ctrl_reg_mirror & (ME8255_PORT_0_OUTPUT << |
| 268 | instance->dio_idx)) { |
| 269 | outb(value, instance->port_reg); |
| 270 | } else { |
| 271 | PERROR("Port not in output mode.\n"); |
| 272 | err = ME_ERRNO_PREVIOUS_CONFIG; |
| 273 | } |
| 274 | } else { |
| 275 | PERROR("Invalid byte number.\n"); |
| 276 | err = ME_ERRNO_INVALID_CHANNEL; |
| 277 | } |
| 278 | break; |
| 279 | |
| 280 | default: |
| 281 | PERROR("Invalid flags specified.\n"); |
| 282 | err = ME_ERRNO_INVALID_FLAGS; |
| 283 | } |
| 284 | spin_unlock(&instance->subdevice_lock); |
| 285 | |
| 286 | ME_SUBDEVICE_EXIT; |
| 287 | |
| 288 | return err; |
| 289 | } |
| 290 | |
| 291 | static int me8255_query_number_channels(struct me_subdevice *subdevice, |
| 292 | int *number) |
| 293 | { |
| 294 | PDEBUG("executed.\n"); |
| 295 | *number = ME8255_NUMBER_CHANNELS; |
| 296 | return ME_ERRNO_SUCCESS; |
| 297 | } |
| 298 | |
| 299 | static int me8255_query_subdevice_type(struct me_subdevice *subdevice, |
| 300 | int *type, int *subtype) |
| 301 | { |
| 302 | PDEBUG("executed.\n"); |
| 303 | *type = ME_TYPE_DIO; |
| 304 | *subtype = ME_SUBTYPE_SINGLE; |
| 305 | return ME_ERRNO_SUCCESS; |
| 306 | } |
| 307 | |
| 308 | static int me8255_query_subdevice_caps(struct me_subdevice *subdevice, |
| 309 | int *caps) |
| 310 | { |
| 311 | PDEBUG("executed.\n"); |
| 312 | *caps = ME_CAPS_DIO_DIR_BYTE; |
| 313 | return ME_ERRNO_SUCCESS; |
| 314 | } |
| 315 | |
| 316 | me8255_subdevice_t *me8255_constructor(uint32_t device_id, |
| 317 | uint32_t reg_base, |
| 318 | unsigned int me8255_idx, |
| 319 | unsigned int dio_idx, |
| 320 | int *ctrl_reg_mirror, |
| 321 | spinlock_t * ctrl_reg_lock) |
| 322 | { |
| 323 | me8255_subdevice_t *subdevice; |
| 324 | int err; |
| 325 | |
| 326 | PDEBUG("executed.\n"); |
| 327 | |
| 328 | /* Allocate memory for subdevice instance */ |
| 329 | subdevice = kmalloc(sizeof(me8255_subdevice_t), GFP_KERNEL); |
| 330 | |
| 331 | if (!subdevice) { |
| 332 | PERROR("Cannot get memory for 8255 instance.\n"); |
| 333 | return NULL; |
| 334 | } |
| 335 | |
| 336 | memset(subdevice, 0, sizeof(me8255_subdevice_t)); |
| 337 | |
| 338 | /* Check if counter index is out of range */ |
| 339 | |
| 340 | if (dio_idx > 2) { |
| 341 | PERROR("DIO index is out of range.\n"); |
| 342 | kfree(subdevice); |
| 343 | return NULL; |
| 344 | } |
| 345 | |
| 346 | /* Initialize subdevice base class */ |
| 347 | err = me_subdevice_init(&subdevice->base); |
| 348 | |
| 349 | if (err) { |
| 350 | PERROR("Cannot initialize subdevice base class instance.\n"); |
| 351 | kfree(subdevice); |
| 352 | return NULL; |
| 353 | } |
| 354 | // Initialize spin locks. |
| 355 | spin_lock_init(&subdevice->subdevice_lock); |
| 356 | |
| 357 | subdevice->ctrl_reg_lock = ctrl_reg_lock; |
| 358 | |
| 359 | /* Save the pointer to global port settings */ |
| 360 | subdevice->ctrl_reg_mirror = ctrl_reg_mirror; |
| 361 | |
| 362 | /* Save type of Meilhaus device */ |
| 363 | subdevice->device_id = device_id; |
| 364 | |
| 365 | /* Save the indices */ |
| 366 | subdevice->me8255_idx = me8255_idx; |
| 367 | subdevice->dio_idx = dio_idx; |
| 368 | |
| 369 | /* Do device specific initialization */ |
| 370 | switch (device_id) { |
| 371 | case PCI_DEVICE_ID_MEILHAUS_ME1400: |
| 372 | case PCI_DEVICE_ID_MEILHAUS_ME14E0: |
| 373 | |
| 374 | case PCI_DEVICE_ID_MEILHAUS_ME140A: |
| 375 | case PCI_DEVICE_ID_MEILHAUS_ME14EA: |
| 376 | /* Check if 8255 index is out of range */ |
| 377 | if (me8255_idx > 0) { |
| 378 | PERROR("8255 index is out of range.\n"); |
| 379 | me_subdevice_deinit(&subdevice->base); |
| 380 | kfree(subdevice); |
| 381 | return NULL; |
| 382 | } |
| 383 | |
| 384 | case PCI_DEVICE_ID_MEILHAUS_ME140B: /* Fall through */ |
| 385 | case PCI_DEVICE_ID_MEILHAUS_ME14EB: |
| 386 | /* Check if 8255 index is out of range */ |
| 387 | if (me8255_idx > 1) { |
| 388 | PERROR("8255 index is out of range.\n"); |
| 389 | me_subdevice_deinit(&subdevice->base); |
| 390 | kfree(subdevice); |
| 391 | return NULL; |
| 392 | } |
| 393 | |
| 394 | /* Get the registers */ |
| 395 | if (me8255_idx == 0) { |
| 396 | subdevice->ctrl_reg = reg_base + ME1400AB_PORT_A_CTRL; |
| 397 | subdevice->port_reg = |
| 398 | reg_base + ME1400AB_PORT_A_0 + dio_idx; |
| 399 | } else if (me8255_idx == 1) { |
| 400 | subdevice->ctrl_reg = reg_base + ME1400AB_PORT_B_CTRL; |
| 401 | subdevice->port_reg = |
| 402 | reg_base + ME1400AB_PORT_B_0 + dio_idx; |
| 403 | } |
| 404 | |
| 405 | break; |
| 406 | |
| 407 | case PCI_DEVICE_ID_MEILHAUS_ME140C: |
| 408 | /* Check if 8255 index is out of range */ |
| 409 | if (me8255_idx > 0) { |
| 410 | PERROR("8255 index is out of range.\n"); |
| 411 | me_subdevice_deinit(&subdevice->base); |
| 412 | kfree(subdevice); |
| 413 | return NULL; |
| 414 | } |
| 415 | |
| 416 | case PCI_DEVICE_ID_MEILHAUS_ME140D: /* Fall through */ |
| 417 | /* Check if 8255 index is out of range */ |
| 418 | if (me8255_idx > 1) { |
| 419 | PERROR("8255 index is out of range.\n"); |
| 420 | me_subdevice_deinit(&subdevice->base); |
| 421 | kfree(subdevice); |
| 422 | return NULL; |
| 423 | } |
| 424 | |
| 425 | /* Get the registers */ |
| 426 | if (me8255_idx == 0) { |
| 427 | subdevice->ctrl_reg = reg_base + ME1400CD_PORT_A_CTRL; |
| 428 | subdevice->port_reg = |
| 429 | reg_base + ME1400CD_PORT_A_0 + dio_idx; |
| 430 | } else if (me8255_idx == 1) { |
| 431 | subdevice->ctrl_reg = reg_base + ME1400CD_PORT_B_CTRL; |
| 432 | subdevice->port_reg = |
| 433 | reg_base + ME1400CD_PORT_B_0 + dio_idx; |
| 434 | } |
| 435 | |
| 436 | break; |
| 437 | |
| 438 | default: |
| 439 | PERROR("Unknown device type. dev ID: 0x%04x\n", device_id); |
| 440 | |
| 441 | me_subdevice_deinit(&subdevice->base); |
| 442 | |
| 443 | kfree(subdevice); |
| 444 | |
| 445 | return NULL; |
| 446 | } |
| 447 | |
| 448 | /* Overload subdevice base class methods. */ |
| 449 | subdevice->base.me_subdevice_io_reset_subdevice = |
| 450 | me8255_io_reset_subdevice; |
| 451 | subdevice->base.me_subdevice_io_single_config = me8255_io_single_config; |
| 452 | subdevice->base.me_subdevice_io_single_read = me8255_io_single_read; |
| 453 | subdevice->base.me_subdevice_io_single_write = me8255_io_single_write; |
| 454 | subdevice->base.me_subdevice_query_number_channels = |
| 455 | me8255_query_number_channels; |
| 456 | subdevice->base.me_subdevice_query_subdevice_type = |
| 457 | me8255_query_subdevice_type; |
| 458 | subdevice->base.me_subdevice_query_subdevice_caps = |
| 459 | me8255_query_subdevice_caps; |
| 460 | |
| 461 | return subdevice; |
| 462 | } |