arch/blackfin/kernel/bfin_gpio.c

   1 /*
   2  * File:         arch/blackfin/kernel/bfin_gpio.c
   3  * Based on:
   4  * Author:       Michael Hennerich (hennerich@blackfin.uclinux.org)
   5  *
   6  * Created:
   7  * Description:  GPIO Abstraction Layer
   8  *
   9  * Modified:
  10  *               Copyright 2006 Analog Devices Inc.
  11  *
  12  * Bugs:         Enter bugs at http://blackfin.uclinux.org/
  13  *
  14  * This program is free software; you can redistribute it and/or modify
  15  * it under the terms of the GNU General Public License as published by
  16  * the Free Software Foundation; either version 2 of the License, or
  17  * (at your option) any later version.
  18  *
  19  * This program is distributed in the hope that it will be useful,
  20  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  21  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  22  * GNU General Public License for more details.
  23  *
  24  * You should have received a copy of the GNU General Public License
  25  * along with this program; if not, see the file COPYING, or write
  26  * to the Free Software Foundation, Inc.,
  27  * 51 Franklin St, Fifth Floor, Boston, MA  02110-1301  USA
  28  */
  29
  30 /*
  31 *  Number     BF537/6/4    BF561    BF533/2/1
  32 *
  33 *  GPIO_0       PF0         PF0        PF0
  34 *  GPIO_1       PF1         PF1        PF1
  35 *  GPIO_2       PF2         PF2        PF2
  36 *  GPIO_3       PF3         PF3        PF3
  37 *  GPIO_4       PF4         PF4        PF4
  38 *  GPIO_5       PF5         PF5        PF5
  39 *  GPIO_6       PF6         PF6        PF6
  40 *  GPIO_7       PF7         PF7        PF7
  41 *  GPIO_8       PF8         PF8        PF8
  42 *  GPIO_9       PF9         PF9        PF9
  43 *  GPIO_10      PF10        PF10       PF10
  44 *  GPIO_11      PF11        PF11       PF11
  45 *  GPIO_12      PF12        PF12       PF12
  46 *  GPIO_13      PF13        PF13       PF13
  47 *  GPIO_14      PF14        PF14       PF14
  48 *  GPIO_15      PF15        PF15       PF15
  49 *  GPIO_16      PG0         PF16
  50 *  GPIO_17      PG1         PF17
  51 *  GPIO_18      PG2         PF18
  52 *  GPIO_19      PG3         PF19
  53 *  GPIO_20      PG4         PF20
  54 *  GPIO_21      PG5         PF21
  55 *  GPIO_22      PG6         PF22
  56 *  GPIO_23      PG7         PF23
  57 *  GPIO_24      PG8         PF24
  58 *  GPIO_25      PG9         PF25
  59 *  GPIO_26      PG10        PF26
  60 *  GPIO_27      PG11        PF27
  61 *  GPIO_28      PG12        PF28
  62 *  GPIO_29      PG13        PF29
  63 *  GPIO_30      PG14        PF30
  64 *  GPIO_31      PG15        PF31
  65 *  GPIO_32      PH0         PF32
  66 *  GPIO_33      PH1         PF33
  67 *  GPIO_34      PH2         PF34
  68 *  GPIO_35      PH3         PF35
  69 *  GPIO_36      PH4         PF36
  70 *  GPIO_37      PH5         PF37
  71 *  GPIO_38      PH6         PF38
  72 *  GPIO_39      PH7         PF39
  73 *  GPIO_40      PH8         PF40
  74 *  GPIO_41      PH9         PF41
  75 *  GPIO_42      PH10        PF42
  76 *  GPIO_43      PH11        PF43
  77 *  GPIO_44      PH12        PF44
  78 *  GPIO_45      PH13        PF45
  79 *  GPIO_46      PH14        PF46
  80 *  GPIO_47      PH15        PF47
  81 */
  82
  83 #include <linux/module.h>
  84 #include <linux/err.h>
  85 #include <asm/blackfin.h>
  86 #include <asm/gpio.h>
  87 #include <linux/irq.h>
  88
  89 #ifdef BF533_FAMILY
  90 static struct gpio_port_t *gpio_bankb[gpio_bank(MAX_BLACKFIN_GPIOS)] = {
  91         (struct gpio_port_t *) FIO_FLAG_D,
  92 };
  93 #endif
  94
  95 #ifdef BF537_FAMILY
  96 static struct gpio_port_t *gpio_bankb[gpio_bank(MAX_BLACKFIN_GPIOS)] = {
  97         (struct gpio_port_t *) PORTFIO,
  98         (struct gpio_port_t *) PORTGIO,
  99         (struct gpio_port_t *) PORTHIO,
 100 };
 101
 102 static unsigned short *port_fer[gpio_bank(MAX_BLACKFIN_GPIOS)] = {
 103         (unsigned short *) PORTF_FER,
 104         (unsigned short *) PORTG_FER,
 105         (unsigned short *) PORTH_FER,
 106 };
 107
 108 #endif
 109
 110 #ifdef BF561_FAMILY
 111 static struct gpio_port_t *gpio_bankb[gpio_bank(MAX_BLACKFIN_GPIOS)] = {
 112         (struct gpio_port_t *) FIO0_FLAG_D,
 113         (struct gpio_port_t *) FIO1_FLAG_D,
 114         (struct gpio_port_t *) FIO2_FLAG_D,
 115 };
 116 #endif
 117
 118 static unsigned short reserved_map[gpio_bank(MAX_BLACKFIN_GPIOS)];
 119
 120 #ifdef CONFIG_PM
 121 static unsigned short wakeup_map[gpio_bank(MAX_BLACKFIN_GPIOS)];
 122 static unsigned char wakeup_flags_map[MAX_BLACKFIN_GPIOS];
 123 static struct gpio_port_s gpio_bank_saved[gpio_bank(MAX_BLACKFIN_GPIOS)];
 124
 125 #ifdef BF533_FAMILY
 126 static unsigned int sic_iwr_irqs[gpio_bank(MAX_BLACKFIN_GPIOS)] = {IRQ_PROG_INTB};
 127 #endif
 128
 129 #ifdef BF537_FAMILY
 130 static unsigned int sic_iwr_irqs[gpio_bank(MAX_BLACKFIN_GPIOS)] = {IRQ_PROG_INTB, IRQ_PORTG_INTB, IRQ_MAC_TX};
 131 #endif
 132
 133 #ifdef BF561_FAMILY
 134 static unsigned int sic_iwr_irqs[gpio_bank(MAX_BLACKFIN_GPIOS)] = {IRQ_PROG0_INTB, IRQ_PROG1_INTB, IRQ_PROG2_INTB};
 135 #endif
 136
 137 #endif /* CONFIG_PM */
 138
 139 inline int check_gpio(unsigned short gpio)
 140 {
 141         if (gpio > MAX_BLACKFIN_GPIOS)
 142                 return -EINVAL;
 143         return 0;
 144 }
 145
 146 #ifdef BF537_FAMILY
 147 void port_setup(unsigned short gpio, unsigned short usage)
 148 {
 149         if (usage == GPIO_USAGE) {
 150                 if (*port_fer[gpio_bank(gpio)] & gpio_bit(gpio))
 151                         printk(KERN_WARNING "bfin-gpio: Possible Conflict with Peripheral "
 152                                "usage and GPIO %d detected!\n", gpio);
 153                 *port_fer[gpio_bank(gpio)] &= ~gpio_bit(gpio);
 154         } else
 155                 *port_fer[gpio_bank(gpio)] |= gpio_bit(gpio);
 156         SSYNC();
 157 }
 158 #else
 159 # define port_setup(...)  do { } while (0)
 160 #endif
 161
 162
 163 void default_gpio(unsigned short gpio)
 164 {
 165         unsigned short bank,bitmask;
 166
 167         bank = gpio_bank(gpio);
 168         bitmask = gpio_bit(gpio);
 169
 170         gpio_bankb[bank]->maska_clear = bitmask;
 171         gpio_bankb[bank]->maskb_clear = bitmask;
 172         SSYNC();
 173         gpio_bankb[bank]->inen &= ~bitmask;
 174         gpio_bankb[bank]->dir &= ~bitmask;
 175         gpio_bankb[bank]->polar &= ~bitmask;
 176         gpio_bankb[bank]->both &= ~bitmask;
 177         gpio_bankb[bank]->edge &= ~bitmask;
 178 }
 179
 180
 181 int __init bfin_gpio_init(void)
 182 {
 183         int i;
 184
 185         printk(KERN_INFO "Blackfin GPIO Controller\n");
 186
 187         for (i = 0; i < MAX_BLACKFIN_GPIOS; i+=GPIO_BANKSIZE)
 188                 reserved_map[gpio_bank(i)] = 0;
 189
 190 #if defined(BF537_FAMILY) && (defined(CONFIG_BFIN_MAC) || defined(CONFIG_BFIN_MAC_MODULE))
 191 # if defined(CONFIG_BFIN_MAC_RMII)
 192         reserved_map[PORT_H] = 0xC373;
 193 # else
 194         reserved_map[PORT_H] = 0xFFFF;
 195 # endif
 196 #endif
 197
 198         return 0;
 199 }
 200
 201 arch_initcall(bfin_gpio_init);
 202
 203
 204 /***********************************************************
 205 *
 206 * FUNCTIONS: Blackfin General Purpose Ports Access Functions
 207 *
 208 * INPUTS/OUTPUTS:
 209 * gpio - GPIO Number between 0 and MAX_BLACKFIN_GPIOS
 210 *
 211 *
 212 * DESCRIPTION: These functions abstract direct register access
 213 *              to Blackfin processor General Purpose
 214 *              Ports Regsiters
 215 *
 216 * CAUTION: These functions do not belong to the GPIO Driver API
 217 *************************************************************
 218 * MODIFICATION HISTORY :
 219 **************************************************************/
 220
 221 /* Set a specific bit */
 222
 223 #define SET_GPIO(name) \
 224 void set_gpio_ ## name(unsigned short gpio, unsigned short arg) \
 225 { \
 226         unsigned long flags; \
 227         BUG_ON(!(reserved_map[gpio_bank(gpio)] & gpio_bit(gpio))); \
 228         local_irq_save(flags); \
 229         if (arg) \
 230                 gpio_bankb[gpio_bank(gpio)]->name |= gpio_bit(gpio); \
 231         else \
 232                 gpio_bankb[gpio_bank(gpio)]->name &= ~gpio_bit(gpio); \
 233         local_irq_restore(flags); \
 234 } \
 235 EXPORT_SYMBOL(set_gpio_ ## name);
 236
 237 SET_GPIO(dir)
 238 SET_GPIO(inen)
 239 SET_GPIO(polar)
 240 SET_GPIO(edge)
 241 SET_GPIO(both)
 242
 243
 244 #define SET_GPIO_SC(name) \
 245 void set_gpio_ ## name(unsigned short gpio, unsigned short arg) \
 246 { \
 247         BUG_ON(!(reserved_map[gpio_bank(gpio)] & gpio_bit(gpio))); \
 248         if (arg) \
 249                 gpio_bankb[gpio_bank(gpio)]->name ## _set = gpio_bit(gpio); \
 250         else \
 251                 gpio_bankb[gpio_bank(gpio)]->name ## _clear = gpio_bit(gpio); \
 252 } \
 253 EXPORT_SYMBOL(set_gpio_ ## name);
 254
 255 SET_GPIO_SC(maska)
 256 SET_GPIO_SC(maskb)
 257
 258 #if defined(ANOMALY_05000311)
 259 void set_gpio_data(unsigned short gpio, unsigned short arg)
 260 {
 261         unsigned long flags;
 262         BUG_ON(!(reserved_map[gpio_bank(gpio)] & gpio_bit(gpio)));
 263         local_irq_save(flags);
 264         if (arg)
 265                 gpio_bankb[gpio_bank(gpio)]->data_set = gpio_bit(gpio);
 266         else
 267                 gpio_bankb[gpio_bank(gpio)]->data_clear = gpio_bit(gpio);
 268         bfin_read_CHIPID();
 269         local_irq_restore(flags);
 270 }
 271 EXPORT_SYMBOL(set_gpio_data);
 272 #else
 273 SET_GPIO_SC(data)
 274 #endif
 275
 276
 277 #if defined(ANOMALY_05000311)
 278 void set_gpio_toggle(unsigned short gpio)
 279 {
 280         unsigned long flags;
 281         BUG_ON(!(reserved_map[gpio_bank(gpio)] & gpio_bit(gpio)));
 282         local_irq_save(flags);
 283         gpio_bankb[gpio_bank(gpio)]->toggle = gpio_bit(gpio);
 284         bfin_read_CHIPID();
 285         local_irq_restore(flags);
 286 }
 287 #else
 288 void set_gpio_toggle(unsigned short gpio)
 289 {
 290         BUG_ON(!(reserved_map[gpio_bank(gpio)] & gpio_bit(gpio)));
 291         gpio_bankb[gpio_bank(gpio)]->toggle = gpio_bit(gpio);
 292 }
 293 #endif
 294 EXPORT_SYMBOL(set_gpio_toggle);
 295
 296
 297 /*Set current PORT date (16-bit word)*/
 298
 299 #define SET_GPIO_P(name) \
 300 void set_gpiop_ ## name(unsigned short gpio, unsigned short arg) \
 301 { \
 302         gpio_bankb[gpio_bank(gpio)]->name = arg; \
 303 } \
 304 EXPORT_SYMBOL(set_gpiop_ ## name);
 305
 306 SET_GPIO_P(dir)
 307 SET_GPIO_P(inen)
 308 SET_GPIO_P(polar)
 309 SET_GPIO_P(edge)
 310 SET_GPIO_P(both)
 311 SET_GPIO_P(maska)
 312 SET_GPIO_P(maskb)
 313
 314
 315 #if defined(ANOMALY_05000311)
 316 void set_gpiop_data(unsigned short gpio, unsigned short arg)
 317 {
 318         unsigned long flags;
 319         local_irq_save(flags);
 320         gpio_bankb[gpio_bank(gpio)]->data = arg;
 321         bfin_read_CHIPID();
 322         local_irq_restore(flags);
 323 }
 324 EXPORT_SYMBOL(set_gpiop_data);
 325 #else
 326 SET_GPIO_P(data)
 327 #endif
 328
 329
 330
 331 /* Get a specific bit */
 332
 333 #define GET_GPIO(name) \
 334 unsigned short get_gpio_ ## name(unsigned short gpio) \
 335 { \
 336         return (0x01 & (gpio_bankb[gpio_bank(gpio)]->name >> gpio_sub_n(gpio))); \
 337 } \
 338 EXPORT_SYMBOL(get_gpio_ ## name);
 339
 340 GET_GPIO(dir)
 341 GET_GPIO(inen)
 342 GET_GPIO(polar)
 343 GET_GPIO(edge)
 344 GET_GPIO(both)
 345 GET_GPIO(maska)
 346 GET_GPIO(maskb)
 347
 348
 349 #if defined(ANOMALY_05000311)
 350 unsigned short get_gpio_data(unsigned short gpio)
 351 {
 352         unsigned long flags;
 353         unsigned short ret;
 354         BUG_ON(!(reserved_map[gpio_bank(gpio)] & gpio_bit(gpio)));
 355         local_irq_save(flags);
 356         ret = 0x01 & (gpio_bankb[gpio_bank(gpio)]->data >> gpio_sub_n(gpio));
 357         bfin_read_CHIPID();
 358         local_irq_restore(flags);
 359         return ret;
 360 }
 361 EXPORT_SYMBOL(get_gpio_data);
 362 #else
 363 GET_GPIO(data)
 364 #endif
 365
 366 /*Get current PORT date (16-bit word)*/
 367
 368 #define GET_GPIO_P(name) \
 369 unsigned short get_gpiop_ ## name(unsigned short gpio) \
 370 { \
 371         return (gpio_bankb[gpio_bank(gpio)]->name);\
 372 } \
 373 EXPORT_SYMBOL(get_gpiop_ ## name);
 374
 375 GET_GPIO_P(dir)
 376 GET_GPIO_P(inen)
 377 GET_GPIO_P(polar)
 378 GET_GPIO_P(edge)
 379 GET_GPIO_P(both)
 380 GET_GPIO_P(maska)
 381 GET_GPIO_P(maskb)
 382
 383 #if defined(ANOMALY_05000311)
 384 unsigned short get_gpiop_data(unsigned short gpio)
 385 {
 386         unsigned long flags;
 387         unsigned short ret;
 388         local_irq_save(flags);
 389         ret = gpio_bankb[gpio_bank(gpio)]->data;
 390         bfin_read_CHIPID();
 391         local_irq_restore(flags);
 392         return ret;
 393 }
 394 EXPORT_SYMBOL(get_gpiop_data);
 395 #else
 396 GET_GPIO_P(data)
 397 #endif
 398
 399 #ifdef CONFIG_PM
 400 /***********************************************************
 401 *
 402 * FUNCTIONS: Blackfin PM Setup API
 403 *
 404 * INPUTS/OUTPUTS:
 405 * gpio - GPIO Number between 0 and MAX_BLACKFIN_GPIOS
 406 * type -
 407 *       PM_WAKE_RISING
 408 *       PM_WAKE_FALLING
 409 *       PM_WAKE_HIGH
 410 *       PM_WAKE_LOW
 411 *       PM_WAKE_BOTH_EDGES
 412 *
 413 * DESCRIPTION: Blackfin PM Driver API
 414 *
 415 * CAUTION:
 416 *************************************************************
 417 * MODIFICATION HISTORY :
 418 **************************************************************/
 419 int gpio_pm_wakeup_request(unsigned short gpio, unsigned char type)
 420 {
 421         unsigned long flags;
 422
 423         if ((check_gpio(gpio) < 0) || !type)
 424                 return -EINVAL;
 425
 426         local_irq_save(flags);
 427
 428         wakeup_map[gpio_bank(gpio)] |= gpio_bit(gpio);
 429         wakeup_flags_map[gpio] = type;
 430         local_irq_restore(flags);
 431
 432         return 0;
 433 }
 434 EXPORT_SYMBOL(gpio_pm_wakeup_request);
 435
 436 void gpio_pm_wakeup_free(unsigned short gpio)
 437 {
 438         unsigned long flags;
 439
 440         if (check_gpio(gpio) < 0)
 441                 return;
 442
 443         local_irq_save(flags);
 444
 445         wakeup_map[gpio_bank(gpio)] &= ~gpio_bit(gpio);
 446
 447         local_irq_restore(flags);
 448 }
 449 EXPORT_SYMBOL(gpio_pm_wakeup_free);
 450
 451 static int bfin_gpio_wakeup_type(unsigned short gpio, unsigned char type)
 452 {
 453         port_setup(gpio, GPIO_USAGE);
 454         set_gpio_dir(gpio, 0);
 455         set_gpio_inen(gpio, 1);
 456
 457         if (type & (PM_WAKE_RISING | PM_WAKE_FALLING))
 458                 set_gpio_edge(gpio, 1);
 459          else
 460                 set_gpio_edge(gpio, 0);
 461
 462         if ((type & (PM_WAKE_BOTH_EDGES)) == (PM_WAKE_BOTH_EDGES))
 463                 set_gpio_both(gpio, 1);
 464         else
 465                 set_gpio_both(gpio, 0);
 466
 467         if ((type & (PM_WAKE_FALLING | PM_WAKE_LOW)))
 468                 set_gpio_polar(gpio, 1);
 469         else
 470                 set_gpio_polar(gpio, 0);
 471
 472         SSYNC();
 473
 474         return 0;
 475 }
 476
 477 u32 gpio_pm_setup(void)
 478 {
 479         u32 sic_iwr = 0;
 480         u16 bank, mask, i, gpio;
 481
 482         for (i = 0; i < MAX_BLACKFIN_GPIOS; i+=GPIO_BANKSIZE) {
 483                 mask = wakeup_map[gpio_bank(i)];
 484                 bank = gpio_bank(i);
 485
 486                 gpio_bank_saved[bank].maskb = gpio_bankb[bank]->maskb;
 487                 gpio_bankb[bank]->maskb = 0;
 488
 489                 if (mask) {
 490 #ifdef BF537_FAMILY
 491                         gpio_bank_saved[bank].fer   = *port_fer[bank];
 492 #endif
 493                         gpio_bank_saved[bank].inen  = gpio_bankb[bank]->inen;
 494                         gpio_bank_saved[bank].polar = gpio_bankb[bank]->polar;
 495                         gpio_bank_saved[bank].dir   = gpio_bankb[bank]->dir;
 496                         gpio_bank_saved[bank].edge  = gpio_bankb[bank]->edge;
 497                         gpio_bank_saved[bank].both  = gpio_bankb[bank]->both;
 498
 499                         gpio = i;
 500
 501                         while (mask) {
 502                                 if (mask & 1) {
 503                                         bfin_gpio_wakeup_type(gpio, wakeup_flags_map[gpio]);
 504                                         set_gpio_data(gpio, 0); /*Clear*/
 505                                 }
 506                                 gpio++;
 507                                 mask >>= 1;
 508                         }
 509
 510                         sic_iwr |= 1 << (sic_iwr_irqs[bank] - (IRQ_CORETMR + 1));
 511                         gpio_bankb[bank]->maskb_set = wakeup_map[gpio_bank(i)];
 512                 }
 513         }
 514
 515         if (sic_iwr)
 516                 return sic_iwr;
 517         else
 518                 return IWR_ENABLE_ALL;
 519 }
 520
 521
 522 void gpio_pm_restore(void)
 523 {
 524         u16 bank, mask, i;
 525
 526         for (i = 0; i < MAX_BLACKFIN_GPIOS; i+=GPIO_BANKSIZE) {
 527                 mask = wakeup_map[gpio_bank(i)];
 528                 bank = gpio_bank(i);
 529
 530                 if (mask) {
 531 #ifdef BF537_FAMILY
 532                         *port_fer[bank]         = gpio_bank_saved[bank].fer;
 533 #endif
 534                         gpio_bankb[bank]->inen  = gpio_bank_saved[bank].inen;
 535                         gpio_bankb[bank]->dir   = gpio_bank_saved[bank].dir;
 536                         gpio_bankb[bank]->polar = gpio_bank_saved[bank].polar;
 537                         gpio_bankb[bank]->edge  = gpio_bank_saved[bank].edge;
 538                         gpio_bankb[bank]->both  = gpio_bank_saved[bank].both;
 539                 }
 540
 541                 gpio_bankb[bank]->maskb = gpio_bank_saved[bank].maskb;
 542         }
 543 }
 544
 545 #endif
 546
 547 /***********************************************************
 548 *
 549 * FUNCTIONS: Blackfin GPIO Driver
 550 *
 551 * INPUTS/OUTPUTS:
 552 * gpio - GPIO Number between 0 and MAX_BLACKFIN_GPIOS
 553 *
 554 *
 555 * DESCRIPTION: Blackfin GPIO Driver API
 556 *
 557 * CAUTION:
 558 *************************************************************
 559 * MODIFICATION HISTORY :
 560 **************************************************************/
 561
 562 int gpio_request(unsigned short gpio, const char *label)
 563 {
 564         unsigned long flags;
 565
 566         if (check_gpio(gpio) < 0)
 567                 return -EINVAL;
 568
 569         local_irq_save(flags);
 570
 571         if (unlikely(reserved_map[gpio_bank(gpio)] & gpio_bit(gpio))) {
 572                 printk(KERN_ERR "bfin-gpio: GPIO %d is already reserved!\n", gpio);
 573                 dump_stack();
 574                 local_irq_restore(flags);
 575                 return -EBUSY;
 576         }
 577         reserved_map[gpio_bank(gpio)] |= gpio_bit(gpio);
 578
 579         local_irq_restore(flags);
 580
 581         port_setup(gpio, GPIO_USAGE);
 582
 583         return 0;
 584 }
 585 EXPORT_SYMBOL(gpio_request);
 586
 587
 588 void gpio_free(unsigned short gpio)
 589 {
 590         unsigned long flags;
 591
 592         if (check_gpio(gpio) < 0)
 593                 return;
 594
 595         local_irq_save(flags);
 596
 597         if (unlikely(!(reserved_map[gpio_bank(gpio)] & gpio_bit(gpio)))) {
 598                 printk(KERN_ERR "bfin-gpio: GPIO %d wasn't reserved!\n", gpio);
 599                 dump_stack();
 600                 local_irq_restore(flags);
 601                 return;
 602         }
 603
 604         default_gpio(gpio);
 605
 606         reserved_map[gpio_bank(gpio)] &= ~gpio_bit(gpio);
 607
 608         local_irq_restore(flags);
 609 }
 610 EXPORT_SYMBOL(gpio_free);
 611
 612
 613 void gpio_direction_input(unsigned short gpio)
 614 {
 615         unsigned long flags;
 616
 617         BUG_ON(!(reserved_map[gpio_bank(gpio)] & gpio_bit(gpio)));
 618
 619         local_irq_save(flags);
 620         gpio_bankb[gpio_bank(gpio)]->dir &= ~gpio_bit(gpio);
 621         gpio_bankb[gpio_bank(gpio)]->inen |= gpio_bit(gpio);
 622         local_irq_restore(flags);
 623 }
 624 EXPORT_SYMBOL(gpio_direction_input);
 625
 626 void gpio_direction_output(unsigned short gpio)
 627 {
 628         unsigned long flags;
 629
 630         BUG_ON(!(reserved_map[gpio_bank(gpio)] & gpio_bit(gpio)));
 631
 632         local_irq_save(flags);
 633         gpio_bankb[gpio_bank(gpio)]->inen &= ~gpio_bit(gpio);
 634         gpio_bankb[gpio_bank(gpio)]->dir |= gpio_bit(gpio);
 635         local_irq_restore(flags);
 636 }
 637 EXPORT_SYMBOL(gpio_direction_output);