David Kiliani | 3fedd14 | 2008-11-01 00:39:12 +0100 | [diff] [blame] | 1 | /** |
| 2 | * @file me8200_di.c |
| 3 | * |
| 4 | * @brief ME-8200 digital input subdevice instance. |
| 5 | * @note Copyright (C) 2007 Meilhaus Electronic GmbH (support@meilhaus.de) |
| 6 | * @author Guenter Gebhardt |
| 7 | * @author Krzysztof Gantzke (k.gantzke@meilhaus.de) |
| 8 | */ |
| 9 | |
| 10 | /* |
| 11 | * Copyright (C) 2007 Meilhaus Electronic GmbH (support@meilhaus.de) |
| 12 | * |
| 13 | * This file is free software; you can redistribute it and/or modify |
| 14 | * it under the terms of the GNU General Public License as published by |
| 15 | * the Free Software Foundation; either version 2 of the License, or |
| 16 | * (at your option) any later version. |
| 17 | * |
| 18 | * This program is distributed in the hope that it will be useful, |
| 19 | * but WITHOUT ANY WARRANTY; without even the implied warranty of |
| 20 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
| 21 | * GNU General Public License for more details. |
| 22 | * |
| 23 | * You should have received a copy of the GNU General Public License |
| 24 | * along with this program; if not, write to the Free Software |
| 25 | * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. |
| 26 | */ |
| 27 | |
| 28 | #ifndef __KERNEL__ |
| 29 | # define __KERNEL__ |
| 30 | #endif |
| 31 | |
| 32 | ///Includes |
| 33 | #include <linux/module.h> |
| 34 | |
| 35 | #include <linux/slab.h> |
| 36 | #include <linux/spinlock.h> |
| 37 | #include <asm/io.h> |
| 38 | #include <linux/types.h> |
| 39 | #include <linux/interrupt.h> |
| 40 | #include <linux/version.h> |
| 41 | |
| 42 | #include "medefines.h" |
| 43 | #include "meerror.h" |
| 44 | |
| 45 | #include "meids.h" |
| 46 | #include "medebug.h" |
| 47 | #include "me8200_reg.h" |
| 48 | #include "me8200_di_reg.h" |
| 49 | #include "me8200_di.h" |
| 50 | |
| 51 | /// Defines |
| 52 | static void me8200_di_destructor(struct me_subdevice *subdevice); |
| 53 | static int me8200_di_io_irq_start(me_subdevice_t * subdevice, |
| 54 | struct file *filep, |
| 55 | int channel, |
| 56 | int irq_source, |
| 57 | int irq_edge, int irq_arg, int flags); |
| 58 | static int me8200_di_io_irq_wait(me_subdevice_t * subdevice, |
| 59 | struct file *filep, |
| 60 | int channel, |
| 61 | int *irq_count, |
| 62 | int *value, int time_out, int flags); |
| 63 | static int me8200_di_io_irq_stop(me_subdevice_t * subdevice, |
| 64 | struct file *filep, int channel, int flags); |
| 65 | static int me8200_di_io_single_config(me_subdevice_t * subdevice, |
| 66 | struct file *filep, |
| 67 | int channel, |
| 68 | int single_config, |
| 69 | int ref, |
| 70 | int trig_chan, |
| 71 | int trig_type, int trig_edge, int flags); |
| 72 | static int me8200_di_io_single_read(me_subdevice_t * subdevice, |
| 73 | struct file *filep, |
| 74 | int channel, |
| 75 | int *value, int time_out, int flags); |
| 76 | static int me8200_di_io_reset_subdevice(struct me_subdevice *subdevice, |
| 77 | struct file *filep, int flags); |
| 78 | static int me8200_di_query_number_channels(me_subdevice_t * subdevice, |
| 79 | int *number); |
| 80 | static int me8200_di_query_subdevice_type(me_subdevice_t * subdevice, |
| 81 | int *type, int *subtype); |
| 82 | static int me8200_di_query_subdevice_caps(me_subdevice_t * subdevice, |
| 83 | int *caps); |
| 84 | #if LINUX_VERSION_CODE >= KERNEL_VERSION(2, 6, 19) |
| 85 | static irqreturn_t me8200_isr(int irq, void *dev_id); |
| 86 | #else |
| 87 | static irqreturn_t me8200_isr(int irq, void *dev_id, struct pt_regs *regs); |
| 88 | #endif |
| 89 | #if LINUX_VERSION_CODE >= KERNEL_VERSION(2, 6, 19) |
| 90 | static irqreturn_t me8200_isr_EX(int irq, void *dev_id); |
| 91 | #else |
| 92 | static irqreturn_t me8200_isr_EX(int irq, void *dev_id, struct pt_regs *regs); |
| 93 | #endif |
| 94 | static void me8200_di_check_version(me8200_di_subdevice_t * instance, |
| 95 | unsigned long addr); |
| 96 | |
| 97 | ///Functions |
| 98 | static int me8200_di_io_irq_start(me_subdevice_t * subdevice, |
| 99 | struct file *filep, |
| 100 | int channel, |
| 101 | int irq_source, |
| 102 | int irq_edge, int irq_arg, int flags) |
| 103 | { |
| 104 | me8200_di_subdevice_t *instance; |
| 105 | int err = ME_ERRNO_SUCCESS; |
| 106 | volatile uint8_t tmp; |
| 107 | unsigned long status; |
| 108 | |
| 109 | PDEBUG("executed.\n"); |
| 110 | |
| 111 | instance = (me8200_di_subdevice_t *) subdevice; |
| 112 | |
| 113 | if (irq_source == ME_IRQ_SOURCE_DIO_PATTERN) { |
| 114 | if (flags & |
| 115 | ~(ME_IO_IRQ_START_PATTERN_FILTERING | |
| 116 | ME_IO_IRQ_START_DIO_BYTE)) { |
| 117 | PERROR("Invalid flag specified.\n"); |
| 118 | return ME_ERRNO_INVALID_FLAGS; |
| 119 | } |
| 120 | |
| 121 | if (irq_edge != ME_IRQ_EDGE_NOT_USED) { |
| 122 | PERROR("Invalid irq edge specified.\n"); |
| 123 | return ME_ERRNO_INVALID_IRQ_EDGE; |
| 124 | } |
| 125 | } else if (irq_source == ME_IRQ_SOURCE_DIO_MASK) { |
| 126 | if (flags & |
| 127 | ~(ME_IO_IRQ_START_EXTENDED_STATUS | |
| 128 | ME_IO_IRQ_START_DIO_BYTE)) { |
| 129 | PERROR("Invalid flag specified.\n"); |
| 130 | return ME_ERRNO_INVALID_FLAGS; |
| 131 | } |
| 132 | |
| 133 | if ((irq_edge != ME_IRQ_EDGE_RISING) |
| 134 | && (irq_edge != ME_IRQ_EDGE_FALLING) |
| 135 | && (irq_edge != ME_IRQ_EDGE_ANY)) { |
| 136 | PERROR("Invalid irq edge specified.\n"); |
| 137 | return ME_ERRNO_INVALID_IRQ_EDGE; |
| 138 | } |
| 139 | |
| 140 | if (!(irq_arg & 0xFF)) { |
| 141 | PERROR("No mask specified.\n"); |
| 142 | return ME_ERRNO_INVALID_IRQ_ARG; |
| 143 | } |
| 144 | } else { |
| 145 | PERROR("Invalid irq source specified.\n"); |
| 146 | return ME_ERRNO_INVALID_IRQ_SOURCE; |
| 147 | } |
| 148 | |
| 149 | if (channel) { |
| 150 | PERROR("Invalid channel specified.\n"); |
| 151 | return ME_ERRNO_INVALID_CHANNEL; |
| 152 | } |
| 153 | |
| 154 | ME_SUBDEVICE_ENTER; |
| 155 | |
| 156 | spin_lock_irqsave(&instance->subdevice_lock, status); |
| 157 | if (irq_source == ME_IRQ_SOURCE_DIO_PATTERN) { |
| 158 | outb(irq_arg, instance->compare_reg); |
| 159 | PDEBUG_REG("compare_reg outb(0x%lX+0x%lX)=0x%x\n", |
| 160 | instance->reg_base, |
| 161 | instance->compare_reg - instance->reg_base, irq_arg); |
| 162 | outb(0xFF, instance->mask_reg); |
| 163 | PDEBUG_REG("mask_reg outb(0x%lX+0x%lX)=0x%x\n", |
| 164 | instance->reg_base, |
| 165 | instance->mask_reg - instance->reg_base, 0xff); |
| 166 | instance->compare_value = irq_arg; |
| 167 | instance->filtering_flag = |
| 168 | (flags & ME_IO_IRQ_START_PATTERN_FILTERING) ? 1 : 0; |
| 169 | } |
| 170 | if (irq_source == ME_IRQ_SOURCE_DIO_MASK) { |
| 171 | outb(irq_arg, instance->mask_reg); |
| 172 | PDEBUG_REG("mask_reg outb(0x%lX+0x%lX)=0x%x\n", |
| 173 | instance->reg_base, |
| 174 | instance->mask_reg - instance->reg_base, irq_arg); |
| 175 | instance->filtering_flag = 0; |
| 176 | } |
| 177 | |
| 178 | spin_lock(instance->irq_mode_lock); |
| 179 | tmp = inb(instance->irq_mode_reg); |
| 180 | tmp &= |
| 181 | ~(ME8200_IRQ_MODE_MASK << |
| 182 | (ME8200_IRQ_MODE_DI_SHIFT * instance->di_idx)); |
| 183 | if (irq_source == ME_IRQ_SOURCE_DIO_PATTERN) { |
| 184 | tmp |= |
| 185 | ME8200_IRQ_MODE_MASK_COMPARE << (ME8200_IRQ_MODE_DI_SHIFT * |
| 186 | instance->di_idx); |
| 187 | } |
| 188 | |
| 189 | if (irq_source == ME_IRQ_SOURCE_DIO_MASK) { |
| 190 | tmp |= |
| 191 | ME8200_IRQ_MODE_MASK_MASK << (ME8200_IRQ_MODE_DI_SHIFT * |
| 192 | instance->di_idx); |
| 193 | } |
| 194 | outb(tmp, instance->irq_mode_reg); |
| 195 | PDEBUG_REG("irq_mode_reg outb(0x%lX+0x%lX)=0x%x\n", instance->reg_base, |
| 196 | instance->irq_mode_reg - instance->reg_base, tmp); |
| 197 | spin_unlock(instance->irq_mode_lock); |
| 198 | |
| 199 | spin_lock(instance->irq_ctrl_lock); |
| 200 | tmp = inb(instance->irq_ctrl_reg); |
| 201 | tmp |= |
| 202 | (ME8200_DI_IRQ_CTRL_BIT_CLEAR << |
| 203 | (ME8200_DI_IRQ_CTRL_SHIFT * instance->di_idx)); |
| 204 | tmp |= |
| 205 | ME8200_DI_IRQ_CTRL_BIT_ENABLE << (ME8200_DI_IRQ_CTRL_SHIFT * |
| 206 | instance->di_idx); |
| 207 | |
| 208 | if (irq_source == ME_IRQ_SOURCE_DIO_MASK) { |
| 209 | tmp &= |
| 210 | ~(ME8200_DI_IRQ_CTRL_MASK_EDGE << |
| 211 | (ME8200_DI_IRQ_CTRL_SHIFT * instance->di_idx)); |
| 212 | if (irq_edge == ME_IRQ_EDGE_RISING) { |
| 213 | tmp |= |
| 214 | ME8200_DI_IRQ_CTRL_MASK_EDGE_RISING << |
| 215 | (ME8200_DI_IRQ_CTRL_SHIFT * instance->di_idx); |
| 216 | } else if (irq_edge == ME_IRQ_EDGE_FALLING) { |
| 217 | tmp |= |
| 218 | ME8200_DI_IRQ_CTRL_MASK_EDGE_FALLING << |
| 219 | (ME8200_DI_IRQ_CTRL_SHIFT * instance->di_idx); |
| 220 | } else if (irq_edge == ME_IRQ_EDGE_ANY) { |
| 221 | tmp |= |
| 222 | ME8200_DI_IRQ_CTRL_MASK_EDGE_ANY << |
| 223 | (ME8200_DI_IRQ_CTRL_SHIFT * instance->di_idx); |
| 224 | } |
| 225 | } |
| 226 | outb(tmp, instance->irq_ctrl_reg); |
| 227 | PDEBUG_REG("irq_ctrl_reg outb(0x%lX+0x%lX)=0x%x\n", instance->reg_base, |
| 228 | instance->irq_ctrl_reg - instance->reg_base, tmp); |
| 229 | tmp &= |
| 230 | ~(ME8200_DI_IRQ_CTRL_BIT_CLEAR << |
| 231 | (ME8200_DI_IRQ_CTRL_SHIFT * instance->di_idx)); |
| 232 | outb(tmp, instance->irq_ctrl_reg); |
| 233 | PDEBUG_REG("irq_ctrl_reg outb(0x%lX+0x%lX)=0x%x\n", instance->reg_base, |
| 234 | instance->irq_ctrl_reg - instance->reg_base, tmp); |
| 235 | |
| 236 | instance->line_value = inb(instance->port_reg); |
| 237 | spin_unlock(instance->irq_ctrl_lock); |
| 238 | |
| 239 | instance->rised = 0; |
| 240 | instance->status_value = 0; |
| 241 | instance->status_value_edges = 0; |
| 242 | instance->status_flag = flags & ME_IO_IRQ_START_EXTENDED_STATUS; |
| 243 | spin_unlock_irqrestore(&instance->subdevice_lock, status); |
| 244 | ME_SUBDEVICE_EXIT; |
| 245 | |
| 246 | return err; |
| 247 | } |
| 248 | |
| 249 | static int me8200_di_io_irq_wait(me_subdevice_t * subdevice, |
| 250 | struct file *filep, |
| 251 | int channel, |
| 252 | int *irq_count, |
| 253 | int *value, int time_out, int flags) |
| 254 | { |
| 255 | me8200_di_subdevice_t *instance; |
| 256 | int err = ME_ERRNO_SUCCESS; |
| 257 | long t = 0; |
| 258 | unsigned long cpu_flags; |
| 259 | int count; |
| 260 | |
| 261 | PDEBUG("executed.\n"); |
| 262 | PDEVELOP("PID: %d.\n", current->pid); |
| 263 | |
| 264 | instance = (me8200_di_subdevice_t *) subdevice; |
| 265 | |
| 266 | if (flags & |
| 267 | ~(ME_IO_IRQ_WAIT_NORMAL_STATUS | ME_IO_IRQ_WAIT_EXTENDED_STATUS)) { |
| 268 | PERROR("Invalid flag specified.\n"); |
| 269 | return ME_ERRNO_INVALID_FLAGS; |
| 270 | } |
| 271 | |
| 272 | if (channel) { |
| 273 | PERROR("Invalid channel specified.\n"); |
| 274 | return ME_ERRNO_INVALID_CHANNEL; |
| 275 | } |
| 276 | |
| 277 | if (time_out < 0) { |
| 278 | PERROR("Invalid time_out specified.\n"); |
| 279 | return ME_ERRNO_INVALID_TIMEOUT; |
| 280 | } |
| 281 | |
| 282 | if (time_out) { |
| 283 | t = (time_out * HZ) / 1000; |
| 284 | |
| 285 | if (t == 0) |
| 286 | t = 1; |
| 287 | } |
| 288 | |
| 289 | ME_SUBDEVICE_ENTER; |
| 290 | |
| 291 | if (instance->rised <= 0) { |
| 292 | instance->rised = 0; |
| 293 | count = instance->count; |
| 294 | |
| 295 | if (time_out) { |
| 296 | t = wait_event_interruptible_timeout(instance-> |
| 297 | wait_queue, |
| 298 | ((count != |
| 299 | instance->count) |
| 300 | || (instance-> |
| 301 | rised < 0)), |
| 302 | t); |
| 303 | // t = wait_event_interruptible_timeout(instance->wait_queue, (instance->rised != 0), t); |
| 304 | if (t == 0) { |
| 305 | PERROR("Wait on interrupt timed out.\n"); |
| 306 | err = ME_ERRNO_TIMEOUT; |
| 307 | } |
| 308 | } else { |
| 309 | wait_event_interruptible(instance->wait_queue, |
| 310 | ((count != instance->count) |
| 311 | || (instance->rised < 0))); |
| 312 | // wait_event_interruptible(instance->wait_queue, (instance->rised != 0)); |
| 313 | } |
| 314 | |
| 315 | if (instance->rised < 0) { |
| 316 | PERROR("Wait on interrupt aborted by user.\n"); |
| 317 | err = ME_ERRNO_CANCELLED; |
| 318 | } |
| 319 | } |
| 320 | |
| 321 | if (signal_pending(current)) { |
| 322 | PERROR("Wait on interrupt aborted by signal.\n"); |
| 323 | err = ME_ERRNO_SIGNAL; |
| 324 | } |
| 325 | |
| 326 | spin_lock_irqsave(&instance->subdevice_lock, cpu_flags); |
| 327 | *irq_count = instance->count; |
| 328 | if (!err) { |
| 329 | if (flags & ME_IO_IRQ_WAIT_NORMAL_STATUS) { |
| 330 | *value = instance->status_value; |
| 331 | } else if (flags & ME_IO_IRQ_WAIT_EXTENDED_STATUS) { |
| 332 | *value = instance->status_value_edges; |
| 333 | } else { // Use default |
| 334 | if (!instance->status_flag) { |
| 335 | *value = instance->status_value; |
| 336 | } else { |
| 337 | *value = instance->status_value_edges; |
| 338 | } |
| 339 | } |
| 340 | instance->rised = 0; |
| 341 | /* |
| 342 | instance->status_value = 0; |
| 343 | instance->status_value_edges = 0; |
| 344 | */ |
| 345 | } else { |
| 346 | *value = 0; |
| 347 | } |
| 348 | spin_unlock_irqrestore(&instance->subdevice_lock, cpu_flags); |
| 349 | |
| 350 | ME_SUBDEVICE_EXIT; |
| 351 | |
| 352 | return err; |
| 353 | } |
| 354 | |
| 355 | static int me8200_di_io_irq_stop(me_subdevice_t * subdevice, |
| 356 | struct file *filep, int channel, int flags) |
| 357 | { |
| 358 | me8200_di_subdevice_t *instance; |
| 359 | uint8_t tmp; |
| 360 | unsigned long status; |
| 361 | |
| 362 | PDEBUG("executed.\n"); |
| 363 | |
| 364 | instance = (me8200_di_subdevice_t *) subdevice; |
| 365 | |
| 366 | if (flags) { |
| 367 | PERROR("Invalid flag specified.\n"); |
| 368 | return ME_ERRNO_INVALID_FLAGS; |
| 369 | } |
| 370 | |
| 371 | if (channel) { |
| 372 | PERROR("Invalid channel specified.\n"); |
| 373 | return ME_ERRNO_INVALID_CHANNEL; |
| 374 | } |
| 375 | |
| 376 | ME_SUBDEVICE_ENTER spin_lock_irqsave(&instance->subdevice_lock, status); |
| 377 | spin_lock(instance->irq_ctrl_lock); |
| 378 | tmp = inb(instance->irq_ctrl_reg); |
| 379 | tmp |= |
| 380 | (ME8200_DI_IRQ_CTRL_BIT_ENABLE << |
| 381 | (ME8200_DI_IRQ_CTRL_SHIFT * instance->di_idx)); |
| 382 | outb(tmp, instance->irq_ctrl_reg); |
| 383 | PDEBUG_REG("irq_ctrl_reg outb(0x%lX+0x%lX)=0x%x\n", instance->reg_base, |
| 384 | instance->irq_ctrl_reg - instance->reg_base, tmp); |
| 385 | tmp &= |
| 386 | ~(ME8200_DI_IRQ_CTRL_BIT_ENABLE << |
| 387 | (ME8200_DI_IRQ_CTRL_SHIFT * instance->di_idx)); |
| 388 | tmp |= |
| 389 | (ME8200_DI_IRQ_CTRL_BIT_CLEAR << |
| 390 | (ME8200_DI_IRQ_CTRL_SHIFT * instance->di_idx)); |
| 391 | // tmp &= ~(ME8200_DI_IRQ_CTRL_BIT_CLEAR << (ME8200_DI_IRQ_CTRL_SHIFT * instance->di_idx)); |
| 392 | outb(tmp, instance->irq_ctrl_reg); |
| 393 | PDEBUG_REG("irq_ctrl_reg outb(0x%lX+0x%lX)=0x%x\n", instance->reg_base, |
| 394 | instance->irq_ctrl_reg - instance->reg_base, tmp); |
| 395 | spin_unlock(instance->irq_ctrl_lock); |
| 396 | |
| 397 | instance->rised = -1; |
| 398 | instance->status_value = 0; |
| 399 | instance->status_value_edges = 0; |
| 400 | instance->filtering_flag = 0; |
| 401 | spin_unlock_irqrestore(&instance->subdevice_lock, status); |
| 402 | wake_up_interruptible_all(&instance->wait_queue); |
| 403 | |
| 404 | ME_SUBDEVICE_EXIT; |
| 405 | |
| 406 | return ME_ERRNO_SUCCESS; |
| 407 | } |
| 408 | |
| 409 | static int me8200_di_io_single_config(me_subdevice_t * subdevice, |
| 410 | struct file *filep, |
| 411 | int channel, |
| 412 | int single_config, |
| 413 | int ref, |
| 414 | int trig_chan, |
| 415 | int trig_type, int trig_edge, int flags) |
| 416 | { |
| 417 | me8200_di_subdevice_t *instance; |
| 418 | int err = ME_ERRNO_SUCCESS; |
| 419 | unsigned long status; |
| 420 | |
| 421 | PDEBUG("executed.\n"); |
| 422 | |
| 423 | instance = (me8200_di_subdevice_t *) subdevice; |
| 424 | |
| 425 | ME_SUBDEVICE_ENTER; |
| 426 | |
| 427 | spin_lock_irqsave(&instance->subdevice_lock, status); |
| 428 | |
| 429 | switch (flags) { |
| 430 | case ME_IO_SINGLE_CONFIG_NO_FLAGS: |
| 431 | case ME_IO_SINGLE_CONFIG_DIO_BYTE: |
| 432 | if (channel == 0) { |
| 433 | if (single_config == ME_SINGLE_CONFIG_DIO_INPUT) { |
| 434 | } else { |
| 435 | PERROR("Invalid port direction specified.\n"); |
| 436 | err = ME_ERRNO_INVALID_SINGLE_CONFIG; |
| 437 | } |
| 438 | } else { |
| 439 | PERROR("Invalid channel number.\n"); |
| 440 | err = ME_ERRNO_INVALID_CHANNEL; |
| 441 | } |
| 442 | break; |
| 443 | |
| 444 | default: |
| 445 | PERROR("Invalid flags specified.\n"); |
| 446 | err = ME_ERRNO_INVALID_FLAGS; |
| 447 | } |
| 448 | |
| 449 | spin_unlock_irqrestore(&instance->subdevice_lock, status); |
| 450 | |
| 451 | ME_SUBDEVICE_EXIT; |
| 452 | |
| 453 | return err; |
| 454 | } |
| 455 | |
| 456 | static int me8200_di_io_single_read(me_subdevice_t * subdevice, |
| 457 | struct file *filep, |
| 458 | int channel, |
| 459 | int *value, int time_out, int flags) |
| 460 | { |
| 461 | me8200_di_subdevice_t *instance; |
| 462 | int err = ME_ERRNO_SUCCESS; |
| 463 | unsigned long status; |
| 464 | |
| 465 | PDEBUG("executed.\n"); |
| 466 | |
| 467 | instance = (me8200_di_subdevice_t *) subdevice; |
| 468 | |
| 469 | ME_SUBDEVICE_ENTER; |
| 470 | |
| 471 | spin_lock_irqsave(&instance->subdevice_lock, status); |
| 472 | |
| 473 | switch (flags) { |
| 474 | case ME_IO_SINGLE_TYPE_DIO_BIT: |
| 475 | if ((channel >= 0) && (channel < 8)) { |
| 476 | *value = inb(instance->port_reg) & (0x1 << channel); |
| 477 | } else { |
| 478 | PERROR("Invalid bit number specified.\n"); |
| 479 | err = ME_ERRNO_INVALID_CHANNEL; |
| 480 | } |
| 481 | break; |
| 482 | |
| 483 | case ME_IO_SINGLE_NO_FLAGS: |
| 484 | case ME_IO_SINGLE_TYPE_DIO_BYTE: |
| 485 | if (channel == 0) { |
| 486 | *value = inb(instance->port_reg); |
| 487 | } else { |
| 488 | PERROR("Invalid channel number.\n"); |
| 489 | err = ME_ERRNO_INVALID_CHANNEL; |
| 490 | } |
| 491 | break; |
| 492 | |
| 493 | default: |
| 494 | PERROR("Invalid flags specified.\n"); |
| 495 | err = ME_ERRNO_INVALID_FLAGS; |
| 496 | } |
| 497 | |
| 498 | spin_unlock_irqrestore(&instance->subdevice_lock, status); |
| 499 | |
| 500 | ME_SUBDEVICE_EXIT; |
| 501 | |
| 502 | return err; |
| 503 | } |
| 504 | |
| 505 | static int me8200_di_io_reset_subdevice(struct me_subdevice *subdevice, |
| 506 | struct file *filep, int flags) |
| 507 | { |
| 508 | me8200_di_subdevice_t *instance = (me8200_di_subdevice_t *) subdevice; |
| 509 | |
| 510 | PDEBUG("executed.\n"); |
| 511 | |
| 512 | if (flags) { |
| 513 | PERROR("Invalid flag specified.\n"); |
| 514 | return ME_ERRNO_INVALID_FLAGS; |
| 515 | } |
| 516 | |
| 517 | instance->count = 0; |
| 518 | return me8200_di_io_irq_stop(subdevice, filep, 0, 0); |
| 519 | } |
| 520 | |
| 521 | static int me8200_di_query_number_channels(me_subdevice_t * subdevice, |
| 522 | int *number) |
| 523 | { |
| 524 | PDEBUG("executed.\n"); |
| 525 | *number = 8; |
| 526 | return ME_ERRNO_SUCCESS; |
| 527 | } |
| 528 | |
| 529 | static int me8200_di_query_subdevice_type(me_subdevice_t * subdevice, |
| 530 | int *type, int *subtype) |
| 531 | { |
| 532 | PDEBUG("executed.\n"); |
| 533 | *type = ME_TYPE_DI; |
| 534 | *subtype = ME_SUBTYPE_SINGLE; |
| 535 | return ME_ERRNO_SUCCESS; |
| 536 | } |
| 537 | |
| 538 | static int me8200_di_query_subdevice_caps(me_subdevice_t * subdevice, int *caps) |
| 539 | { |
| 540 | PDEBUG("executed.\n"); |
| 541 | *caps = |
| 542 | ME_CAPS_DIO_BIT_PATTERN_IRQ | |
| 543 | ME_CAPS_DIO_BIT_MASK_IRQ_EDGE_RISING | |
| 544 | ME_CAPS_DIO_BIT_MASK_IRQ_EDGE_FALLING | |
| 545 | ME_CAPS_DIO_BIT_MASK_IRQ_EDGE_ANY; |
| 546 | return ME_ERRNO_SUCCESS; |
| 547 | } |
| 548 | |
| 549 | #if LINUX_VERSION_CODE >= KERNEL_VERSION(2, 6, 19) |
| 550 | static irqreturn_t me8200_isr(int irq, void *dev_id) |
| 551 | #else |
| 552 | static irqreturn_t me8200_isr(int irq, void *dev_id, struct pt_regs *regs) |
| 553 | #endif |
| 554 | { |
| 555 | me8200_di_subdevice_t *instance; |
| 556 | uint8_t ctrl; |
| 557 | uint8_t irq_status; |
| 558 | uint8_t line_value = 0; |
| 559 | uint8_t line_status = 0; |
| 560 | uint32_t status_val = 0; |
| 561 | |
| 562 | instance = (me8200_di_subdevice_t *) dev_id; |
| 563 | |
| 564 | if (irq != instance->irq) { |
| 565 | PERROR("Incorrect interrupt num: %d.\n", irq); |
| 566 | return IRQ_NONE; |
| 567 | } |
| 568 | |
| 569 | irq_status = inb(instance->irq_status_reg); |
| 570 | if (!irq_status) { |
| 571 | PINFO |
| 572 | ("%ld Shared interrupt. %s(): idx=%d irq_status_reg=0x%04X\n", |
Harvey Harrison | d599edc | 2009-01-07 14:31:57 -0800 | [diff] [blame] | 573 | jiffies, __func__, instance->di_idx, irq_status); |
David Kiliani | 3fedd14 | 2008-11-01 00:39:12 +0100 | [diff] [blame] | 574 | return IRQ_NONE; |
| 575 | } |
| 576 | |
| 577 | PDEBUG("executed.\n"); |
| 578 | |
| 579 | spin_lock(&instance->subdevice_lock); |
| 580 | spin_lock(instance->irq_ctrl_lock); |
| 581 | ctrl = inb(instance->irq_ctrl_reg); |
| 582 | ctrl |= |
| 583 | ME8200_DI_IRQ_CTRL_BIT_CLEAR << (ME8200_DI_IRQ_CTRL_SHIFT * |
| 584 | instance->di_idx); |
| 585 | outb(ctrl, instance->irq_ctrl_reg); |
| 586 | PDEBUG_REG("irq_ctrl_reg outb(0x%lX+0x%lX)=0x%x\n", instance->reg_base, |
| 587 | instance->irq_ctrl_reg - instance->reg_base, ctrl); |
| 588 | ctrl &= |
| 589 | ~(ME8200_DI_IRQ_CTRL_BIT_CLEAR << |
| 590 | (ME8200_DI_IRQ_CTRL_SHIFT * instance->di_idx)); |
| 591 | outb(ctrl, instance->irq_ctrl_reg); |
| 592 | PDEBUG_REG("irq_ctrl_reg outb(0x%lX+0x%lX)=0x%x\n", instance->reg_base, |
| 593 | instance->irq_ctrl_reg - instance->reg_base, ctrl); |
| 594 | |
| 595 | line_value = inb(instance->port_reg); |
| 596 | spin_unlock(instance->irq_ctrl_lock); |
| 597 | |
| 598 | line_status = ((uint8_t) instance->line_value ^ line_value); |
| 599 | |
| 600 | // Make extended information. |
| 601 | status_val |= (0x00FF & (~(uint8_t) instance->line_value & line_value)) << 16; //Raise |
| 602 | status_val |= (0x00FF & ((uint8_t) instance->line_value & ~line_value)); //Fall |
| 603 | |
| 604 | instance->line_value = (int)line_value; |
| 605 | |
| 606 | if (instance->rised == 0) { |
| 607 | instance->status_value = irq_status | line_status; |
| 608 | instance->status_value_edges = status_val; |
| 609 | } else { |
| 610 | instance->status_value |= irq_status | line_status; |
| 611 | instance->status_value_edges |= status_val; |
| 612 | } |
| 613 | |
| 614 | if (instance->filtering_flag) { // For compare mode only. |
| 615 | if (instance->compare_value == instance->line_value) { |
| 616 | instance->rised = 1; |
| 617 | instance->count++; |
| 618 | } |
| 619 | } else { |
| 620 | instance->rised = 1; |
| 621 | instance->count++; |
| 622 | } |
| 623 | spin_unlock(&instance->subdevice_lock); |
| 624 | |
| 625 | spin_unlock(&instance->subdevice_lock); |
| 626 | |
| 627 | wake_up_interruptible_all(&instance->wait_queue); |
| 628 | |
| 629 | return IRQ_HANDLED; |
| 630 | } |
| 631 | |
| 632 | #if LINUX_VERSION_CODE >= KERNEL_VERSION(2, 6, 19) |
| 633 | static irqreturn_t me8200_isr_EX(int irq, void *dev_id) |
| 634 | #else |
| 635 | static irqreturn_t me8200_isr_EX(int irq, void *dev_id, struct pt_regs *regs) |
| 636 | #endif |
| 637 | { |
| 638 | me8200_di_subdevice_t *instance; |
| 639 | uint8_t irq_status = 0; |
| 640 | uint16_t irq_status_EX = 0; |
| 641 | uint32_t status_val = 0; |
| 642 | int i, j; |
| 643 | |
| 644 | instance = (me8200_di_subdevice_t *) dev_id; |
| 645 | |
| 646 | if (irq != instance->irq) { |
| 647 | PERROR("Incorrect interrupt num: %d.\n", irq); |
| 648 | return IRQ_NONE; |
| 649 | } |
| 650 | |
| 651 | PDEBUG("executed.\n"); |
| 652 | |
| 653 | //Reset latches. Copy status to extended registers. |
| 654 | irq_status = inb(instance->irq_status_reg); |
| 655 | PDEBUG_REG("idx=%d irq_status_reg=0x%02X\n", instance->di_idx, |
| 656 | irq_status); |
| 657 | |
| 658 | if (!irq_status) { |
| 659 | PINFO |
| 660 | ("%ld Shared interrupt. %s(): idx=%d irq_status_reg=0x%04X\n", |
Harvey Harrison | d599edc | 2009-01-07 14:31:57 -0800 | [diff] [blame] | 661 | jiffies, __func__, instance->di_idx, irq_status); |
David Kiliani | 3fedd14 | 2008-11-01 00:39:12 +0100 | [diff] [blame] | 662 | return IRQ_NONE; |
| 663 | } |
| 664 | |
| 665 | irq_status_EX = inb(instance->irq_status_low_reg); |
| 666 | irq_status_EX |= (inb(instance->irq_status_high_reg) << 8); |
| 667 | |
| 668 | PDEVELOP("EXTENDED REG: 0x%04x\n", irq_status_EX); |
| 669 | instance->line_value = inb(instance->port_reg); |
| 670 | |
| 671 | // Format extended information. |
| 672 | for (i = 0, j = 0; i < 8; i++, j += 2) { |
| 673 | status_val |= ((0x01 << j) & irq_status_EX) >> (j - i); //Fall |
| 674 | status_val |= ((0x01 << (j + 1)) & irq_status_EX) << (15 - j + i); //Raise |
| 675 | } |
| 676 | |
| 677 | spin_lock(&instance->subdevice_lock); |
| 678 | if (instance->rised == 0) { |
| 679 | instance->status_value = irq_status; |
| 680 | instance->status_value_edges = status_val; |
| 681 | } else { |
| 682 | instance->status_value |= irq_status; |
| 683 | instance->status_value_edges |= status_val; |
| 684 | } |
| 685 | |
| 686 | if (instance->filtering_flag) { // For compare mode only. |
| 687 | if (instance->compare_value == instance->line_value) { |
| 688 | instance->rised = 1; |
| 689 | instance->count++; |
| 690 | } |
| 691 | } else { |
| 692 | instance->rised = 1; |
| 693 | instance->count++; |
| 694 | } |
| 695 | spin_unlock(&instance->subdevice_lock); |
| 696 | |
| 697 | wake_up_interruptible_all(&instance->wait_queue); |
| 698 | |
| 699 | return IRQ_HANDLED; |
| 700 | } |
| 701 | |
| 702 | static void me8200_di_destructor(struct me_subdevice *subdevice) |
| 703 | { |
| 704 | me8200_di_subdevice_t *instance; |
| 705 | |
| 706 | PDEBUG("executed.\n"); |
| 707 | |
| 708 | instance = (me8200_di_subdevice_t *) subdevice; |
| 709 | |
| 710 | free_irq(instance->irq, (void *)instance); |
| 711 | me_subdevice_deinit(&instance->base); |
| 712 | kfree(instance); |
| 713 | } |
| 714 | |
| 715 | me8200_di_subdevice_t *me8200_di_constructor(uint32_t me8200_regbase, |
| 716 | unsigned int di_idx, |
| 717 | int irq, |
| 718 | spinlock_t * irq_ctrl_lock, |
| 719 | spinlock_t * irq_mode_lock) |
| 720 | { |
| 721 | me8200_di_subdevice_t *subdevice; |
| 722 | int err; |
| 723 | |
| 724 | PDEBUG("executed.\n"); |
| 725 | |
| 726 | /* Allocate memory for subdevice instance */ |
| 727 | subdevice = kmalloc(sizeof(me8200_di_subdevice_t), GFP_KERNEL); |
| 728 | |
| 729 | if (!subdevice) { |
| 730 | PERROR("Cannot get memory for subdevice instance.\n"); |
| 731 | return NULL; |
| 732 | } |
| 733 | |
| 734 | memset(subdevice, 0, sizeof(me8200_di_subdevice_t)); |
| 735 | |
| 736 | /* Initialize subdevice base class */ |
| 737 | err = me_subdevice_init(&subdevice->base); |
| 738 | |
| 739 | if (err) { |
| 740 | PERROR("Cannot initialize subdevice base class instance.\n"); |
| 741 | kfree(subdevice); |
| 742 | return NULL; |
| 743 | } |
| 744 | // Check firmware version. |
| 745 | me8200_di_check_version(subdevice, |
| 746 | me8200_regbase + ME8200_FIRMWARE_VERSION_REG); |
| 747 | |
| 748 | // Initialize spin locks. |
| 749 | spin_lock_init(&subdevice->subdevice_lock); |
| 750 | |
| 751 | subdevice->irq_ctrl_lock = irq_ctrl_lock; |
| 752 | subdevice->irq_mode_lock = irq_mode_lock; |
| 753 | |
| 754 | /* Save the subdevice index. */ |
| 755 | subdevice->di_idx = di_idx; |
| 756 | |
| 757 | /* Initialize registers */ |
| 758 | if (di_idx == 0) { |
| 759 | subdevice->port_reg = me8200_regbase + ME8200_DI_PORT_0_REG; |
| 760 | subdevice->mask_reg = me8200_regbase + ME8200_DI_MASK_0_REG; |
| 761 | subdevice->compare_reg = |
| 762 | me8200_regbase + ME8200_DI_COMPARE_0_REG; |
| 763 | subdevice->irq_status_reg = |
| 764 | me8200_regbase + ME8200_DI_CHANGE_0_REG; |
| 765 | |
| 766 | subdevice->irq_status_low_reg = |
| 767 | me8200_regbase + ME8200_DI_EXTEND_CHANGE_0_LOW_REG; |
| 768 | subdevice->irq_status_high_reg = |
| 769 | me8200_regbase + ME8200_DI_EXTEND_CHANGE_0_HIGH_REG; |
| 770 | } else if (di_idx == 1) { |
| 771 | subdevice->port_reg = me8200_regbase + ME8200_DI_PORT_1_REG; |
| 772 | subdevice->mask_reg = me8200_regbase + ME8200_DI_MASK_1_REG; |
| 773 | subdevice->compare_reg = |
| 774 | me8200_regbase + ME8200_DI_COMPARE_1_REG; |
| 775 | subdevice->irq_status_reg = |
| 776 | me8200_regbase + ME8200_DI_CHANGE_1_REG; |
| 777 | |
| 778 | subdevice->irq_status_low_reg = |
| 779 | me8200_regbase + ME8200_DI_EXTEND_CHANGE_1_LOW_REG; |
| 780 | subdevice->irq_status_high_reg = |
| 781 | me8200_regbase + ME8200_DI_EXTEND_CHANGE_1_HIGH_REG; |
| 782 | } else { |
| 783 | PERROR("Wrong subdevice idx=%d.\n", di_idx); |
| 784 | kfree(subdevice); |
| 785 | return NULL; |
| 786 | } |
| 787 | subdevice->irq_ctrl_reg = me8200_regbase + ME8200_DI_IRQ_CTRL_REG; |
| 788 | subdevice->irq_mode_reg = me8200_regbase + ME8200_IRQ_MODE_REG; |
| 789 | #ifdef MEDEBUG_DEBUG_REG |
| 790 | subdevice->reg_base = me8200_regbase; |
| 791 | #endif |
| 792 | |
| 793 | /* Initialize wait queue */ |
| 794 | init_waitqueue_head(&subdevice->wait_queue); |
| 795 | |
| 796 | /* Overload base class methods. */ |
| 797 | subdevice->base.me_subdevice_io_irq_start = me8200_di_io_irq_start; |
| 798 | subdevice->base.me_subdevice_io_irq_wait = me8200_di_io_irq_wait; |
| 799 | subdevice->base.me_subdevice_io_irq_stop = me8200_di_io_irq_stop; |
| 800 | subdevice->base.me_subdevice_io_reset_subdevice = |
| 801 | me8200_di_io_reset_subdevice; |
| 802 | subdevice->base.me_subdevice_io_single_config = |
| 803 | me8200_di_io_single_config; |
| 804 | subdevice->base.me_subdevice_io_single_read = me8200_di_io_single_read; |
| 805 | subdevice->base.me_subdevice_query_number_channels = |
| 806 | me8200_di_query_number_channels; |
| 807 | subdevice->base.me_subdevice_query_subdevice_type = |
| 808 | me8200_di_query_subdevice_type; |
| 809 | subdevice->base.me_subdevice_query_subdevice_caps = |
| 810 | me8200_di_query_subdevice_caps; |
| 811 | subdevice->base.me_subdevice_destructor = me8200_di_destructor; |
| 812 | |
| 813 | subdevice->rised = 0; |
| 814 | subdevice->count = 0; |
| 815 | |
| 816 | /* Register interrupt service routine. */ |
| 817 | subdevice->irq = irq; |
| 818 | if (subdevice->version > 0) { // NEW |
| 819 | err = request_irq(subdevice->irq, me8200_isr_EX, |
| 820 | #ifdef IRQF_DISABLED |
| 821 | IRQF_DISABLED | IRQF_SHARED, |
| 822 | #else |
| 823 | SA_INTERRUPT | SA_SHIRQ, |
| 824 | #endif |
| 825 | ME8200_NAME, (void *)subdevice); |
| 826 | } else { //OLD |
| 827 | err = request_irq(subdevice->irq, me8200_isr, |
| 828 | #ifdef IRQF_DISABLED |
| 829 | IRQF_DISABLED | IRQF_SHARED, |
| 830 | #else |
| 831 | SA_INTERRUPT | SA_SHIRQ, |
| 832 | #endif |
| 833 | ME8200_NAME, (void *)subdevice); |
| 834 | } |
| 835 | |
| 836 | if (err) { |
| 837 | PERROR("Cannot initialize subdevice base class instance.\n"); |
| 838 | kfree(subdevice); |
| 839 | return NULL; |
| 840 | } |
| 841 | PDEBUG("Registred irq=%d.\n", subdevice->irq); |
| 842 | |
| 843 | return subdevice; |
| 844 | } |
| 845 | |
| 846 | static void me8200_di_check_version(me8200_di_subdevice_t * instance, |
| 847 | unsigned long addr) |
| 848 | { |
| 849 | |
| 850 | PDEBUG("executed.\n"); |
| 851 | instance->version = 0x000000FF & inb(addr); |
| 852 | PDEVELOP("me8200 firmware version: %d\n", instance->version); |
| 853 | |
| 854 | /// @note Fix for wrong values in this registry. |
| 855 | if ((instance->version < 0x7) || (instance->version > 0x1F)) |
| 856 | instance->version = 0x0; |
| 857 | } |