arch/blackfin/kernel/bfin_gpio.c

   1 /*
   2  * GPIO Abstraction Layer
   3  *
   4  * Copyright 2006-2010 Analog Devices Inc.
   5  *
   6  * Licensed under the GPL-2 or later
   7  */
   8
   9 #include <linux/delay.h>
  10 #include <linux/module.h>
  11 #include <linux/err.h>
  12 #include <linux/proc_fs.h>
  13 #include <linux/seq_file.h>
  14 #include <asm/blackfin.h>
  15 #include <asm/gpio.h>
  16 #include <asm/portmux.h>
  17 #include <linux/irq.h>
  18 #include <asm/irq_handler.h>
  19
  20 #if ANOMALY_05000311 || ANOMALY_05000323
  21 enum {
  22         AWA_data = SYSCR,
  23         AWA_data_clear = SYSCR,
  24         AWA_data_set = SYSCR,
  25         AWA_toggle = SYSCR,
  26         AWA_maska = BFIN_UART_SCR,
  27         AWA_maska_clear = BFIN_UART_SCR,
  28         AWA_maska_set = BFIN_UART_SCR,
  29         AWA_maska_toggle = BFIN_UART_SCR,
  30         AWA_maskb = BFIN_UART_GCTL,
  31         AWA_maskb_clear = BFIN_UART_GCTL,
  32         AWA_maskb_set = BFIN_UART_GCTL,
  33         AWA_maskb_toggle = BFIN_UART_GCTL,
  34         AWA_dir = SPORT1_STAT,
  35         AWA_polar = SPORT1_STAT,
  36         AWA_edge = SPORT1_STAT,
  37         AWA_both = SPORT1_STAT,
  38 #if ANOMALY_05000311
  39         AWA_inen = TIMER_ENABLE,
  40 #elif ANOMALY_05000323
  41         AWA_inen = DMA1_1_CONFIG,
  42 #endif
  43 };
  44         /* Anomaly Workaround */
  45 #define AWA_DUMMY_READ(name) bfin_read16(AWA_ ## name)
  46 #else
  47 #define AWA_DUMMY_READ(...)  do { } while (0)
  48 #endif
  49
  50 static struct gpio_port_t * const gpio_array[] = {
  51 #if defined(BF533_FAMILY) || defined(BF538_FAMILY)
  52         (struct gpio_port_t *) FIO_FLAG_D,
  53 #elif defined(CONFIG_BF52x) || defined(BF537_FAMILY) || defined(CONFIG_BF51x)
  54         (struct gpio_port_t *) PORTFIO,
  55         (struct gpio_port_t *) PORTGIO,
  56         (struct gpio_port_t *) PORTHIO,
  57 #elif defined(BF561_FAMILY)
  58         (struct gpio_port_t *) FIO0_FLAG_D,
  59         (struct gpio_port_t *) FIO1_FLAG_D,
  60         (struct gpio_port_t *) FIO2_FLAG_D,
  61 #elif defined(CONFIG_BF54x)
  62         (struct gpio_port_t *)PORTA_FER,
  63         (struct gpio_port_t *)PORTB_FER,
  64         (struct gpio_port_t *)PORTC_FER,
  65         (struct gpio_port_t *)PORTD_FER,
  66         (struct gpio_port_t *)PORTE_FER,
  67         (struct gpio_port_t *)PORTF_FER,
  68         (struct gpio_port_t *)PORTG_FER,
  69         (struct gpio_port_t *)PORTH_FER,
  70         (struct gpio_port_t *)PORTI_FER,
  71         (struct gpio_port_t *)PORTJ_FER,
  72 #else
  73 # error no gpio arrays defined
  74 #endif
  75 };
  76
  77 #if defined(CONFIG_BF52x) || defined(BF537_FAMILY) || defined(CONFIG_BF51x)
  78 static unsigned short * const port_fer[] = {
  79         (unsigned short *) PORTF_FER,
  80         (unsigned short *) PORTG_FER,
  81         (unsigned short *) PORTH_FER,
  82 };
  83
  84 # if !defined(BF537_FAMILY)
  85 static unsigned short * const port_mux[] = {
  86         (unsigned short *) PORTF_MUX,
  87         (unsigned short *) PORTG_MUX,
  88         (unsigned short *) PORTH_MUX,
  89 };
  90
  91 static const
  92 u8 pmux_offset[][16] = {
  93 #  if defined(CONFIG_BF52x)
  94         { 0, 0, 0, 0, 0, 0, 0, 0, 2, 2, 4, 6, 8, 8, 10, 10 }, /* PORTF */
  95         { 0, 0, 0, 0, 0, 2, 2, 4, 4, 6, 8, 10, 10, 10, 12, 12 }, /* PORTG */
  96         { 0, 0, 0, 0, 0, 0, 0, 0, 2, 4, 4, 4, 4, 4, 4, 4 }, /* PORTH */
  97 #  elif defined(CONFIG_BF51x)
  98         { 0, 2, 2, 2, 2, 2, 2, 4, 6, 6, 6, 8, 8, 8, 8, 10 }, /* PORTF */
  99         { 0, 0, 0, 2, 4, 6, 6, 6, 8, 10, 10, 12, 14, 14, 14, 14 }, /* PORTG */
 100         { 0, 0, 0, 0, 2, 2, 4, 6, 10, 10, 10, 10, 10, 10, 10, 10 }, /* PORTH */
 101 #  endif
 102 };
 103 # endif
 104
 105 #elif defined(BF538_FAMILY)
 106 static unsigned short * const port_fer[] = {
 107         (unsigned short *) PORTCIO_FER,
 108         (unsigned short *) PORTDIO_FER,
 109         (unsigned short *) PORTEIO_FER,
 110 };
 111 #endif
 112
 113 #define RESOURCE_LABEL_SIZE     16
 114
 115 static struct str_ident {
 116         char name[RESOURCE_LABEL_SIZE];
 117 } str_ident[MAX_RESOURCES];
 118
 119 #if defined(CONFIG_PM)
 120 static struct gpio_port_s gpio_bank_saved[GPIO_BANK_NUM];
 121 # ifdef BF538_FAMILY
 122 static unsigned short port_fer_saved[3];
 123 # endif
 124 #endif
 125
 126 static void gpio_error(unsigned gpio)
 127 {
 128         printk(KERN_ERR "bfin-gpio: GPIO %d wasn't requested!\n", gpio);
 129 }
 130
 131 static void set_label(unsigned short ident, const char *label)
 132 {
 133         if (label) {
 134                 strncpy(str_ident[ident].name, label,
 135                          RESOURCE_LABEL_SIZE);
 136                 str_ident[ident].name[RESOURCE_LABEL_SIZE - 1] = 0;
 137         }
 138 }
 139
 140 static char *get_label(unsigned short ident)
 141 {
 142         return (*str_ident[ident].name ? str_ident[ident].name : "UNKNOWN");
 143 }
 144
 145 static int cmp_label(unsigned short ident, const char *label)
 146 {
 147         if (label == NULL) {
 148                 dump_stack();
 149                 printk(KERN_ERR "Please provide none-null label\n");
 150         }
 151
 152         if (label)
 153                 return strcmp(str_ident[ident].name, label);
 154         else
 155                 return -EINVAL;
 156 }
 157
 158 #define map_entry(m, i)      reserved_##m##_map[gpio_bank(i)]
 159 #define is_reserved(m, i, e) (map_entry(m, i) & gpio_bit(i))
 160 #define reserve(m, i)        (map_entry(m, i) |= gpio_bit(i))
 161 #define unreserve(m, i)      (map_entry(m, i) &= ~gpio_bit(i))
 162 #define DECLARE_RESERVED_MAP(m, c) static unsigned short reserved_##m##_map[c]
 163
 164 DECLARE_RESERVED_MAP(gpio, GPIO_BANK_NUM);
 165 DECLARE_RESERVED_MAP(peri, DIV_ROUND_UP(MAX_RESOURCES, GPIO_BANKSIZE));
 166 DECLARE_RESERVED_MAP(gpio_irq, GPIO_BANK_NUM);
 167
 168 inline int check_gpio(unsigned gpio)
 169 {
 170 #if defined(CONFIG_BF54x)
 171         if (gpio == GPIO_PB15 || gpio == GPIO_PC14 || gpio == GPIO_PC15
 172             || gpio == GPIO_PH14 || gpio == GPIO_PH15
 173             || gpio == GPIO_PJ14 || gpio == GPIO_PJ15)
 174                 return -EINVAL;
 175 #endif
 176         if (gpio >= MAX_BLACKFIN_GPIOS)
 177                 return -EINVAL;
 178         return 0;
 179 }
 180
 181 static void port_setup(unsigned gpio, unsigned short usage)
 182 {
 183 #if defined(BF538_FAMILY)
 184         /*
 185          * BF538/9 Port C,D and E are special.
 186          * Inverted PORT_FER polarity on CDE and no PORF_FER on F
 187          * Regular PORT F GPIOs are handled here, CDE are exclusively
 188          * managed by GPIOLIB
 189          */
 190
 191         if (gpio < MAX_BLACKFIN_GPIOS || gpio >= MAX_RESOURCES)
 192                 return;
 193
 194         gpio -= MAX_BLACKFIN_GPIOS;
 195
 196         if (usage == GPIO_USAGE)
 197                 *port_fer[gpio_bank(gpio)] |= gpio_bit(gpio);
 198         else
 199                 *port_fer[gpio_bank(gpio)] &= ~gpio_bit(gpio);
 200         SSYNC();
 201         return;
 202 #endif
 203
 204         if (check_gpio(gpio))
 205                 return;
 206
 207 #if defined(CONFIG_BF52x) || defined(BF537_FAMILY) || defined(CONFIG_BF51x)
 208         if (usage == GPIO_USAGE)
 209                 *port_fer[gpio_bank(gpio)] &= ~gpio_bit(gpio);
 210         else
 211                 *port_fer[gpio_bank(gpio)] |= gpio_bit(gpio);
 212         SSYNC();
 213 #elif defined(CONFIG_BF54x)
 214         if (usage == GPIO_USAGE)
 215                 gpio_array[gpio_bank(gpio)]->port_fer &= ~gpio_bit(gpio);
 216         else
 217                 gpio_array[gpio_bank(gpio)]->port_fer |= gpio_bit(gpio);
 218         SSYNC();
 219 #endif
 220 }
 221
 222 #ifdef BF537_FAMILY
 223 static const s8 port_mux[] = {
 224         [GPIO_PF0] = 3,
 225         [GPIO_PF1] = 3,
 226         [GPIO_PF2] = 4,
 227         [GPIO_PF3] = 4,
 228         [GPIO_PF4] = 5,
 229         [GPIO_PF5] = 6,
 230         [GPIO_PF6] = 7,
 231         [GPIO_PF7] = 8,
 232         [GPIO_PF8 ... GPIO_PF15] = -1,
 233         [GPIO_PG0 ... GPIO_PG7] = -1,
 234         [GPIO_PG8] = 9,
 235         [GPIO_PG9] = 9,
 236         [GPIO_PG10] = 10,
 237         [GPIO_PG11] = 10,
 238         [GPIO_PG12] = 10,
 239         [GPIO_PG13] = 11,
 240         [GPIO_PG14] = 11,
 241         [GPIO_PG15] = 11,
 242         [GPIO_PH0 ... GPIO_PH15] = -1,
 243         [PORT_PJ0 ... PORT_PJ3] = -1,
 244         [PORT_PJ4] = 1,
 245         [PORT_PJ5] = 1,
 246         [PORT_PJ6 ... PORT_PJ9] = -1,
 247         [PORT_PJ10] = 0,
 248         [PORT_PJ11] = 0,
 249 };
 250
 251 static int portmux_group_check(unsigned short per)
 252 {
 253         u16 ident = P_IDENT(per);
 254         u16 function = P_FUNCT2MUX(per);
 255         s8 offset = port_mux[ident];
 256         u16 m, pmux, pfunc;
 257
 258         if (offset < 0)
 259                 return 0;
 260
 261         pmux = bfin_read_PORT_MUX();
 262         for (m = 0; m < ARRAY_SIZE(port_mux); ++m) {
 263                 if (m == ident)
 264                         continue;
 265                 if (port_mux[m] != offset)
 266                         continue;
 267                 if (!is_reserved(peri, m, 1))
 268                         continue;
 269
 270                 if (offset == 1)
 271                         pfunc = (pmux >> offset) & 3;
 272                 else
 273                         pfunc = (pmux >> offset) & 1;
 274                 if (pfunc != function) {
 275                         pr_err("pin group conflict! request pin %d func %d conflict with pin %d func %d\n",
 276                                 ident, function, m, pfunc);
 277                         return -EINVAL;
 278                 }
 279         }
 280
 281         return 0;
 282 }
 283
 284 static void portmux_setup(unsigned short per)
 285 {
 286         u16 ident = P_IDENT(per);
 287         u16 function = P_FUNCT2MUX(per);
 288         s8 offset = port_mux[ident];
 289         u16 pmux;
 290
 291         if (offset == -1)
 292                 return;
 293
 294         pmux = bfin_read_PORT_MUX();
 295         if (offset != 1)
 296                 pmux &= ~(1 << offset);
 297         else
 298                 pmux &= ~(3 << 1);
 299         pmux |= (function << offset);
 300         bfin_write_PORT_MUX(pmux);
 301 }
 302 #elif defined(CONFIG_BF54x)
 303 inline void portmux_setup(unsigned short per)
 304 {
 305         u16 ident = P_IDENT(per);
 306         u16 function = P_FUNCT2MUX(per);
 307         u32 pmux;
 308
 309         pmux = gpio_array[gpio_bank(ident)]->port_mux;
 310
 311         pmux &= ~(0x3 << (2 * gpio_sub_n(ident)));
 312         pmux |= (function & 0x3) << (2 * gpio_sub_n(ident));
 313
 314         gpio_array[gpio_bank(ident)]->port_mux = pmux;
 315 }
 316
 317 inline u16 get_portmux(unsigned short per)
 318 {
 319         u16 ident = P_IDENT(per);
 320         u32 pmux = gpio_array[gpio_bank(ident)]->port_mux;
 321         return (pmux >> (2 * gpio_sub_n(ident)) & 0x3);
 322 }
 323 static int portmux_group_check(unsigned short per)
 324 {
 325         return 0;
 326 }
 327 #elif defined(CONFIG_BF52x) || defined(CONFIG_BF51x)
 328 static int portmux_group_check(unsigned short per)
 329 {
 330         u16 ident = P_IDENT(per);
 331         u16 function = P_FUNCT2MUX(per);
 332         u8 offset = pmux_offset[gpio_bank(ident)][gpio_sub_n(ident)];
 333         u16 pin, gpiopin, pfunc;
 334
 335         for (pin = 0; pin < GPIO_BANKSIZE; ++pin) {
 336                 if (offset != pmux_offset[gpio_bank(ident)][pin])
 337                         continue;
 338
 339                 gpiopin = gpio_bank(ident) * GPIO_BANKSIZE + pin;
 340                 if (gpiopin == ident)
 341                         continue;
 342                 if (!is_reserved(peri, gpiopin, 1))
 343                         continue;
 344
 345                 pfunc = *port_mux[gpio_bank(ident)];
 346                 pfunc = (pfunc >> offset) & 3;
 347                 if (pfunc != function) {
 348                         pr_err("pin group conflict! request pin %d func %d conflict with pin %d func %d\n",
 349                                 ident, function, gpiopin, pfunc);
 350                         return -EINVAL;
 351                 }
 352         }
 353
 354         return 0;
 355 }
 356
 357 inline void portmux_setup(unsigned short per)
 358 {
 359         u16 ident = P_IDENT(per);
 360         u16 function = P_FUNCT2MUX(per);
 361         u8 offset = pmux_offset[gpio_bank(ident)][gpio_sub_n(ident)];
 362         u16 pmux;
 363
 364         pmux = *port_mux[gpio_bank(ident)];
 365         if  (((pmux >> offset) & 3) == function)
 366                 return;
 367         pmux &= ~(3 << offset);
 368         pmux |= (function & 3) << offset;
 369         *port_mux[gpio_bank(ident)] = pmux;
 370         SSYNC();
 371 }
 372 #else
 373 # define portmux_setup(...)  do { } while (0)
 374 static int portmux_group_check(unsigned short per)
 375 {
 376         return 0;
 377 }
 378 #endif
 379
 380 #ifndef CONFIG_BF54x
 381 /***********************************************************
 382 *
 383 * FUNCTIONS: Blackfin General Purpose Ports Access Functions
 384 *
 385 * INPUTS/OUTPUTS:
 386 * gpio - GPIO Number between 0 and MAX_BLACKFIN_GPIOS
 387 *
 388 *
 389 * DESCRIPTION: These functions abstract direct register access
 390 *              to Blackfin processor General Purpose
 391 *              Ports Regsiters
 392 *
 393 * CAUTION: These functions do not belong to the GPIO Driver API
 394 *************************************************************
 395 * MODIFICATION HISTORY :
 396 **************************************************************/
 397
 398 /* Set a specific bit */
 399
 400 #define SET_GPIO(name) \
 401 void set_gpio_ ## name(unsigned gpio, unsigned short arg) \
 402 { \
 403         unsigned long flags; \
 404         flags = hard_local_irq_save(); \
 405         if (arg) \
 406                 gpio_array[gpio_bank(gpio)]->name |= gpio_bit(gpio); \
 407         else \
 408                 gpio_array[gpio_bank(gpio)]->name &= ~gpio_bit(gpio); \
 409         AWA_DUMMY_READ(name); \
 410         hard_local_irq_restore(flags); \
 411 } \
 412 EXPORT_SYMBOL(set_gpio_ ## name);
 413
 414 SET_GPIO(dir)   /* set_gpio_dir() */
 415 SET_GPIO(inen)  /* set_gpio_inen() */
 416 SET_GPIO(polar) /* set_gpio_polar() */
 417 SET_GPIO(edge)  /* set_gpio_edge() */
 418 SET_GPIO(both)  /* set_gpio_both() */
 419
 420
 421 #define SET_GPIO_SC(name) \
 422 void set_gpio_ ## name(unsigned gpio, unsigned short arg) \
 423 { \
 424         unsigned long flags; \
 425         if (ANOMALY_05000311 || ANOMALY_05000323) \
 426                 flags = hard_local_irq_save(); \
 427         if (arg) \
 428                 gpio_array[gpio_bank(gpio)]->name ## _set = gpio_bit(gpio); \
 429         else \
 430                 gpio_array[gpio_bank(gpio)]->name ## _clear = gpio_bit(gpio); \
 431         if (ANOMALY_05000311 || ANOMALY_05000323) { \
 432                 AWA_DUMMY_READ(name); \
 433                 hard_local_irq_restore(flags); \
 434         } \
 435 } \
 436 EXPORT_SYMBOL(set_gpio_ ## name);
 437
 438 SET_GPIO_SC(maska)
 439 SET_GPIO_SC(maskb)
 440 SET_GPIO_SC(data)
 441
 442 void set_gpio_toggle(unsigned gpio)
 443 {
 444         unsigned long flags;
 445         if (ANOMALY_05000311 || ANOMALY_05000323)
 446                 flags = hard_local_irq_save();
 447         gpio_array[gpio_bank(gpio)]->toggle = gpio_bit(gpio);
 448         if (ANOMALY_05000311 || ANOMALY_05000323) {
 449                 AWA_DUMMY_READ(toggle);
 450                 hard_local_irq_restore(flags);
 451         }
 452 }
 453 EXPORT_SYMBOL(set_gpio_toggle);
 454
 455
 456 /*Set current PORT date (16-bit word)*/
 457
 458 #define SET_GPIO_P(name) \
 459 void set_gpiop_ ## name(unsigned gpio, unsigned short arg) \
 460 { \
 461         unsigned long flags; \
 462         if (ANOMALY_05000311 || ANOMALY_05000323) \
 463                 flags = hard_local_irq_save(); \
 464         gpio_array[gpio_bank(gpio)]->name = arg; \
 465         if (ANOMALY_05000311 || ANOMALY_05000323) { \
 466                 AWA_DUMMY_READ(name); \
 467                 hard_local_irq_restore(flags); \
 468         } \
 469 } \
 470 EXPORT_SYMBOL(set_gpiop_ ## name);
 471
 472 SET_GPIO_P(data)
 473 SET_GPIO_P(dir)
 474 SET_GPIO_P(inen)
 475 SET_GPIO_P(polar)
 476 SET_GPIO_P(edge)
 477 SET_GPIO_P(both)
 478 SET_GPIO_P(maska)
 479 SET_GPIO_P(maskb)
 480
 481 /* Get a specific bit */
 482 #define GET_GPIO(name) \
 483 unsigned short get_gpio_ ## name(unsigned gpio) \
 484 { \
 485         unsigned long flags; \
 486         unsigned short ret; \
 487         if (ANOMALY_05000311 || ANOMALY_05000323) \
 488                 flags = hard_local_irq_save(); \
 489         ret = 0x01 & (gpio_array[gpio_bank(gpio)]->name >> gpio_sub_n(gpio)); \
 490         if (ANOMALY_05000311 || ANOMALY_05000323) { \
 491                 AWA_DUMMY_READ(name); \
 492                 hard_local_irq_restore(flags); \
 493         } \
 494         return ret; \
 495 } \
 496 EXPORT_SYMBOL(get_gpio_ ## name);
 497
 498 GET_GPIO(data)
 499 GET_GPIO(dir)
 500 GET_GPIO(inen)
 501 GET_GPIO(polar)
 502 GET_GPIO(edge)
 503 GET_GPIO(both)
 504 GET_GPIO(maska)
 505 GET_GPIO(maskb)
 506
 507 /*Get current PORT date (16-bit word)*/
 508
 509 #define GET_GPIO_P(name) \
 510 unsigned short get_gpiop_ ## name(unsigned gpio) \
 511 { \
 512         unsigned long flags; \
 513         unsigned short ret; \
 514         if (ANOMALY_05000311 || ANOMALY_05000323) \
 515                 flags = hard_local_irq_save(); \
 516         ret = (gpio_array[gpio_bank(gpio)]->name); \
 517         if (ANOMALY_05000311 || ANOMALY_05000323) { \
 518                 AWA_DUMMY_READ(name); \
 519                 hard_local_irq_restore(flags); \
 520         } \
 521         return ret; \
 522 } \
 523 EXPORT_SYMBOL(get_gpiop_ ## name);
 524
 525 GET_GPIO_P(data)
 526 GET_GPIO_P(dir)
 527 GET_GPIO_P(inen)
 528 GET_GPIO_P(polar)
 529 GET_GPIO_P(edge)
 530 GET_GPIO_P(both)
 531 GET_GPIO_P(maska)
 532 GET_GPIO_P(maskb)
 533
 534
 535 #ifdef CONFIG_PM
 536 DECLARE_RESERVED_MAP(wakeup, GPIO_BANK_NUM);
 537
 538 static const unsigned int sic_iwr_irqs[] = {
 539 #if defined(BF533_FAMILY)
 540         IRQ_PROG_INTB
 541 #elif defined(BF537_FAMILY)
 542         IRQ_PF_INTB_WATCH, IRQ_PORTG_INTB, IRQ_PH_INTB_MAC_TX
 543 #elif defined(BF538_FAMILY)
 544         IRQ_PORTF_INTB
 545 #elif defined(CONFIG_BF52x) || defined(CONFIG_BF51x)
 546         IRQ_PORTF_INTB, IRQ_PORTG_INTB, IRQ_PORTH_INTB
 547 #elif defined(BF561_FAMILY)
 548         IRQ_PROG0_INTB, IRQ_PROG1_INTB, IRQ_PROG2_INTB
 549 #else
 550 # error no SIC_IWR defined
 551 #endif
 552 };
 553
 554 /***********************************************************
 555 *
 556 * FUNCTIONS: Blackfin PM Setup API
 557 *
 558 * INPUTS/OUTPUTS:
 559 * gpio - GPIO Number between 0 and MAX_BLACKFIN_GPIOS
 560 * type -
 561 *       PM_WAKE_RISING
 562 *       PM_WAKE_FALLING
 563 *       PM_WAKE_HIGH
 564 *       PM_WAKE_LOW
 565 *       PM_WAKE_BOTH_EDGES
 566 *
 567 * DESCRIPTION: Blackfin PM Driver API
 568 *
 569 * CAUTION:
 570 *************************************************************
 571 * MODIFICATION HISTORY :
 572 **************************************************************/
 573 int gpio_pm_wakeup_ctrl(unsigned gpio, unsigned ctrl)
 574 {
 575         unsigned long flags;
 576
 577         if (check_gpio(gpio) < 0)
 578                 return -EINVAL;
 579
 580         flags = hard_local_irq_save();
 581         if (ctrl)
 582                 reserve(wakeup, gpio);
 583         else
 584                 unreserve(wakeup, gpio);
 585
 586         set_gpio_maskb(gpio, ctrl);
 587         hard_local_irq_restore(flags);
 588
 589         return 0;
 590 }
 591
 592 int bfin_pm_standby_ctrl(unsigned ctrl)
 593 {
 594         u16 bank, mask, i;
 595
 596         for (i = 0; i < MAX_BLACKFIN_GPIOS; i += GPIO_BANKSIZE) {
 597                 mask = map_entry(wakeup, i);
 598                 bank = gpio_bank(i);
 599
 600                 if (mask)
 601                         bfin_internal_set_wake(sic_iwr_irqs[bank], ctrl);
 602         }
 603         return 0;
 604 }
 605
 606 void bfin_gpio_pm_hibernate_suspend(void)
 607 {
 608         int i, bank;
 609
 610 #ifdef BF538_FAMILY
 611         for (i = 0; i < ARRAY_SIZE(port_fer_saved); ++i)
 612                 port_fer_saved[i] = *port_fer[i];
 613 #endif
 614
 615         for (i = 0; i < MAX_BLACKFIN_GPIOS; i += GPIO_BANKSIZE) {
 616                 bank = gpio_bank(i);
 617
 618 #if defined(CONFIG_BF52x) || defined(BF537_FAMILY) || defined(CONFIG_BF51x)
 619                 gpio_bank_saved[bank].fer = *port_fer[bank];
 620 #if defined(CONFIG_BF52x) || defined(CONFIG_BF51x)
 621                 gpio_bank_saved[bank].mux = *port_mux[bank];
 622 #else
 623                 if (bank == 0)
 624                         gpio_bank_saved[bank].mux = bfin_read_PORT_MUX();
 625 #endif
 626 #endif
 627                 gpio_bank_saved[bank].data  = gpio_array[bank]->data;
 628                 gpio_bank_saved[bank].inen  = gpio_array[bank]->inen;
 629                 gpio_bank_saved[bank].polar = gpio_array[bank]->polar;
 630                 gpio_bank_saved[bank].dir   = gpio_array[bank]->dir;
 631                 gpio_bank_saved[bank].edge  = gpio_array[bank]->edge;
 632                 gpio_bank_saved[bank].both  = gpio_array[bank]->both;
 633                 gpio_bank_saved[bank].maska = gpio_array[bank]->maska;
 634         }
 635
 636 #ifdef BFIN_SPECIAL_GPIO_BANKS
 637         bfin_special_gpio_pm_hibernate_suspend();
 638 #endif
 639
 640         AWA_DUMMY_READ(maska);
 641 }
 642
 643 void bfin_gpio_pm_hibernate_restore(void)
 644 {
 645         int i, bank;
 646
 647 #ifdef BF538_FAMILY
 648         for (i = 0; i < ARRAY_SIZE(port_fer_saved); ++i)
 649                 *port_fer[i] = port_fer_saved[i];
 650 #endif
 651
 652         for (i = 0; i < MAX_BLACKFIN_GPIOS; i += GPIO_BANKSIZE) {
 653                 bank = gpio_bank(i);
 654
 655 #if defined(CONFIG_BF52x) || defined(BF537_FAMILY) || defined(CONFIG_BF51x)
 656 #if defined(CONFIG_BF52x) || defined(CONFIG_BF51x)
 657                 *port_mux[bank] = gpio_bank_saved[bank].mux;
 658 #else
 659                 if (bank == 0)
 660                         bfin_write_PORT_MUX(gpio_bank_saved[bank].mux);
 661 #endif
 662                 *port_fer[bank] = gpio_bank_saved[bank].fer;
 663 #endif
 664                 gpio_array[bank]->inen  = gpio_bank_saved[bank].inen;
 665                 gpio_array[bank]->data_set = gpio_bank_saved[bank].data
 666                                                 & gpio_bank_saved[bank].dir;
 667                 gpio_array[bank]->dir   = gpio_bank_saved[bank].dir;
 668                 gpio_array[bank]->polar = gpio_bank_saved[bank].polar;
 669                 gpio_array[bank]->edge  = gpio_bank_saved[bank].edge;
 670                 gpio_array[bank]->both  = gpio_bank_saved[bank].both;
 671                 gpio_array[bank]->maska = gpio_bank_saved[bank].maska;
 672         }
 673
 674 #ifdef BFIN_SPECIAL_GPIO_BANKS
 675         bfin_special_gpio_pm_hibernate_restore();
 676 #endif
 677
 678         AWA_DUMMY_READ(maska);
 679 }
 680
 681
 682 #endif
 683 #else /* CONFIG_BF54x */
 684 #ifdef CONFIG_PM
 685
 686 int bfin_pm_standby_ctrl(unsigned ctrl)
 687 {
 688         return 0;
 689 }
 690
 691 void bfin_gpio_pm_hibernate_suspend(void)
 692 {
 693         int i, bank;
 694
 695         for (i = 0; i < MAX_BLACKFIN_GPIOS; i += GPIO_BANKSIZE) {
 696                 bank = gpio_bank(i);
 697
 698                 gpio_bank_saved[bank].fer = gpio_array[bank]->port_fer;
 699                 gpio_bank_saved[bank].mux = gpio_array[bank]->port_mux;
 700                 gpio_bank_saved[bank].data = gpio_array[bank]->data;
 701                 gpio_bank_saved[bank].inen = gpio_array[bank]->inen;
 702                 gpio_bank_saved[bank].dir = gpio_array[bank]->dir_set;
 703         }
 704 }
 705
 706 void bfin_gpio_pm_hibernate_restore(void)
 707 {
 708         int i, bank;
 709
 710         for (i = 0; i < MAX_BLACKFIN_GPIOS; i += GPIO_BANKSIZE) {
 711                 bank = gpio_bank(i);
 712
 713                 gpio_array[bank]->port_mux = gpio_bank_saved[bank].mux;
 714                 gpio_array[bank]->port_fer = gpio_bank_saved[bank].fer;
 715                 gpio_array[bank]->inen = gpio_bank_saved[bank].inen;
 716                 gpio_array[bank]->data_set = gpio_bank_saved[bank].data
 717                                                 & gpio_bank_saved[bank].dir;
 718                 gpio_array[bank]->dir_set = gpio_bank_saved[bank].dir;
 719         }
 720 }
 721 #endif
 722
 723 unsigned short get_gpio_dir(unsigned gpio)
 724 {
 725         return (0x01 & (gpio_array[gpio_bank(gpio)]->dir_clear >> gpio_sub_n(gpio)));
 726 }
 727 EXPORT_SYMBOL(get_gpio_dir);
 728
 729 #endif /* CONFIG_BF54x */
 730
 731 /***********************************************************
 732 *
 733 * FUNCTIONS:    Blackfin Peripheral Resource Allocation
 734 *               and PortMux Setup
 735 *
 736 * INPUTS/OUTPUTS:
 737 * per   Peripheral Identifier
 738 * label String
 739 *
 740 * DESCRIPTION: Blackfin Peripheral Resource Allocation and Setup API
 741 *
 742 * CAUTION:
 743 *************************************************************
 744 * MODIFICATION HISTORY :
 745 **************************************************************/
 746
 747 int peripheral_request(unsigned short per, const char *label)
 748 {
 749         unsigned long flags;
 750         unsigned short ident = P_IDENT(per);
 751
 752         /*
 753          * Don't cares are pins with only one dedicated function
 754          */
 755
 756         if (per & P_DONTCARE)
 757                 return 0;
 758
 759         if (!(per & P_DEFINED))
 760                 return -ENODEV;
 761
 762         BUG_ON(ident >= MAX_RESOURCES);
 763
 764         flags = hard_local_irq_save();
 765
 766         /* If a pin can be muxed as either GPIO or peripheral, make
 767          * sure it is not already a GPIO pin when we request it.
 768          */
 769         if (unlikely(!check_gpio(ident) && is_reserved(gpio, ident, 1))) {
 770                 if (system_state == SYSTEM_BOOTING)
 771                         dump_stack();
 772                 printk(KERN_ERR
 773                        "%s: Peripheral %d is already reserved as GPIO by %s !\n",
 774                        __func__, ident, get_label(ident));
 775                 hard_local_irq_restore(flags);
 776                 return -EBUSY;
 777         }
 778
 779         if (unlikely(is_reserved(peri, ident, 1))) {
 780
 781                 /*
 782                  * Pin functions like AMC address strobes my
 783                  * be requested and used by several drivers
 784                  */
 785
 786 #ifdef CONFIG_BF54x
 787                 if (!((per & P_MAYSHARE) && get_portmux(per) == P_FUNCT2MUX(per))) {
 788 #else
 789                 if (!(per & P_MAYSHARE)) {
 790 #endif
 791                         /*
 792                          * Allow that the identical pin function can
 793                          * be requested from the same driver twice
 794                          */
 795
 796                         if (cmp_label(ident, label) == 0)
 797                                 goto anyway;
 798
 799                         if (system_state == SYSTEM_BOOTING)
 800                                 dump_stack();
 801                         printk(KERN_ERR
 802                                "%s: Peripheral %d function %d is already reserved by %s !\n",
 803                                __func__, ident, P_FUNCT2MUX(per), get_label(ident));
 804                         hard_local_irq_restore(flags);
 805                         return -EBUSY;
 806                 }
 807         }
 808
 809         if (unlikely(portmux_group_check(per))) {
 810                 hard_local_irq_restore(flags);
 811                 return -EBUSY;
 812         }
 813  anyway:
 814         reserve(peri, ident);
 815
 816         portmux_setup(per);
 817         port_setup(ident, PERIPHERAL_USAGE);
 818
 819         hard_local_irq_restore(flags);
 820         set_label(ident, label);
 821
 822         return 0;
 823 }
 824 EXPORT_SYMBOL(peripheral_request);
 825
 826 int peripheral_request_list(const unsigned short per[], const char *label)
 827 {
 828         u16 cnt;
 829         int ret;
 830
 831         for (cnt = 0; per[cnt] != 0; cnt++) {
 832
 833                 ret = peripheral_request(per[cnt], label);
 834
 835                 if (ret < 0) {
 836                         for ( ; cnt > 0; cnt--)
 837                                 peripheral_free(per[cnt - 1]);
 838
 839                         return ret;
 840                 }
 841         }
 842
 843         return 0;
 844 }
 845 EXPORT_SYMBOL(peripheral_request_list);
 846
 847 void peripheral_free(unsigned short per)
 848 {
 849         unsigned long flags;
 850         unsigned short ident = P_IDENT(per);
 851
 852         if (per & P_DONTCARE)
 853                 return;
 854
 855         if (!(per & P_DEFINED))
 856                 return;
 857
 858         flags = hard_local_irq_save();
 859
 860         if (unlikely(!is_reserved(peri, ident, 0))) {
 861                 hard_local_irq_restore(flags);
 862                 return;
 863         }
 864
 865         if (!(per & P_MAYSHARE))
 866                 port_setup(ident, GPIO_USAGE);
 867
 868         unreserve(peri, ident);
 869
 870         set_label(ident, "free");
 871
 872         hard_local_irq_restore(flags);
 873 }
 874 EXPORT_SYMBOL(peripheral_free);
 875
 876 void peripheral_free_list(const unsigned short per[])
 877 {
 878         u16 cnt;
 879         for (cnt = 0; per[cnt] != 0; cnt++)
 880                 peripheral_free(per[cnt]);
 881 }
 882 EXPORT_SYMBOL(peripheral_free_list);
 883
 884 /***********************************************************
 885 *
 886 * FUNCTIONS: Blackfin GPIO Driver
 887 *
 888 * INPUTS/OUTPUTS:
 889 * gpio  PIO Number between 0 and MAX_BLACKFIN_GPIOS
 890 * label String
 891 *
 892 * DESCRIPTION: Blackfin GPIO Driver API
 893 *
 894 * CAUTION:
 895 *************************************************************
 896 * MODIFICATION HISTORY :
 897 **************************************************************/
 898
 899 int bfin_gpio_request(unsigned gpio, const char *label)
 900 {
 901         unsigned long flags;
 902
 903         if (check_gpio(gpio) < 0)
 904                 return -EINVAL;
 905
 906         flags = hard_local_irq_save();
 907
 908         /*
 909          * Allow that the identical GPIO can
 910          * be requested from the same driver twice
 911          * Do nothing and return -
 912          */
 913
 914         if (cmp_label(gpio, label) == 0) {
 915                 hard_local_irq_restore(flags);
 916                 return 0;
 917         }
 918
 919         if (unlikely(is_reserved(gpio, gpio, 1))) {
 920                 if (system_state == SYSTEM_BOOTING)
 921                         dump_stack();
 922                 printk(KERN_ERR "bfin-gpio: GPIO %d is already reserved by %s !\n",
 923                        gpio, get_label(gpio));
 924                 hard_local_irq_restore(flags);
 925                 return -EBUSY;
 926         }
 927         if (unlikely(is_reserved(peri, gpio, 1))) {
 928                 if (system_state == SYSTEM_BOOTING)
 929                         dump_stack();
 930                 printk(KERN_ERR
 931                        "bfin-gpio: GPIO %d is already reserved as Peripheral by %s !\n",
 932                        gpio, get_label(gpio));
 933                 hard_local_irq_restore(flags);
 934                 return -EBUSY;
 935         }
 936         if (unlikely(is_reserved(gpio_irq, gpio, 1))) {
 937                 printk(KERN_NOTICE "bfin-gpio: GPIO %d is already reserved as gpio-irq!"
 938                        " (Documentation/blackfin/bfin-gpio-notes.txt)\n", gpio);
 939         }
 940 #ifndef CONFIG_BF54x
 941         else {  /* Reset POLAR setting when acquiring a gpio for the first time */
 942                 set_gpio_polar(gpio, 0);
 943         }
 944 #endif
 945
 946         reserve(gpio, gpio);
 947         set_label(gpio, label);
 948
 949         hard_local_irq_restore(flags);
 950
 951         port_setup(gpio, GPIO_USAGE);
 952
 953         return 0;
 954 }
 955 EXPORT_SYMBOL(bfin_gpio_request);
 956
 957 void bfin_gpio_free(unsigned gpio)
 958 {
 959         unsigned long flags;
 960
 961         if (check_gpio(gpio) < 0)
 962                 return;
 963
 964         might_sleep();
 965
 966         flags = hard_local_irq_save();
 967
 968         if (unlikely(!is_reserved(gpio, gpio, 0))) {
 969                 if (system_state == SYSTEM_BOOTING)
 970                         dump_stack();
 971                 gpio_error(gpio);
 972                 hard_local_irq_restore(flags);
 973                 return;
 974         }
 975
 976         unreserve(gpio, gpio);
 977
 978         set_label(gpio, "free");
 979
 980         hard_local_irq_restore(flags);
 981 }
 982 EXPORT_SYMBOL(bfin_gpio_free);
 983
 984 #ifdef BFIN_SPECIAL_GPIO_BANKS
 985 DECLARE_RESERVED_MAP(special_gpio, gpio_bank(MAX_RESOURCES));
 986
 987 int bfin_special_gpio_request(unsigned gpio, const char *label)
 988 {
 989         unsigned long flags;
 990
 991         flags = hard_local_irq_save();
 992
 993         /*
 994          * Allow that the identical GPIO can
 995          * be requested from the same driver twice
 996          * Do nothing and return -
 997          */
 998
 999         if (cmp_label(gpio, label) == 0) {
1000                 hard_local_irq_restore(flags);
1001                 return 0;
1002         }
1003
1004         if (unlikely(is_reserved(special_gpio, gpio, 1))) {
1005                 hard_local_irq_restore(flags);
1006                 printk(KERN_ERR "bfin-gpio: GPIO %d is already reserved by %s !\n",
1007                        gpio, get_label(gpio));
1008
1009                 return -EBUSY;
1010         }
1011         if (unlikely(is_reserved(peri, gpio, 1))) {
1012                 hard_local_irq_restore(flags);
1013                 printk(KERN_ERR
1014                        "bfin-gpio: GPIO %d is already reserved as Peripheral by %s !\n",
1015                        gpio, get_label(gpio));
1016
1017                 return -EBUSY;
1018         }
1019
1020         reserve(special_gpio, gpio);
1021         reserve(peri, gpio);
1022
1023         set_label(gpio, label);
1024         hard_local_irq_restore(flags);
1025         port_setup(gpio, GPIO_USAGE);
1026
1027         return 0;
1028 }
1029 EXPORT_SYMBOL(bfin_special_gpio_request);
1030
1031 void bfin_special_gpio_free(unsigned gpio)
1032 {
1033         unsigned long flags;
1034
1035         might_sleep();
1036
1037         flags = hard_local_irq_save();
1038
1039         if (unlikely(!is_reserved(special_gpio, gpio, 0))) {
1040                 gpio_error(gpio);
1041                 hard_local_irq_restore(flags);
1042                 return;
1043         }
1044
1045         unreserve(special_gpio, gpio);
1046         unreserve(peri, gpio);
1047         set_label(gpio, "free");
1048         hard_local_irq_restore(flags);
1049 }
1050 EXPORT_SYMBOL(bfin_special_gpio_free);
1051 #endif
1052
1053
1054 int bfin_gpio_irq_request(unsigned gpio, const char *label)
1055 {
1056         unsigned long flags;
1057
1058         if (check_gpio(gpio) < 0)
1059                 return -EINVAL;
1060
1061         flags = hard_local_irq_save();
1062
1063         if (unlikely(is_reserved(peri, gpio, 1))) {
1064                 if (system_state == SYSTEM_BOOTING)
1065                         dump_stack();
1066                 printk(KERN_ERR
1067                        "bfin-gpio: GPIO %d is already reserved as Peripheral by %s !\n",
1068                        gpio, get_label(gpio));
1069                 hard_local_irq_restore(flags);
1070                 return -EBUSY;
1071         }
1072         if (unlikely(is_reserved(gpio, gpio, 1)))
1073                 printk(KERN_NOTICE "bfin-gpio: GPIO %d is already reserved by %s! "
1074                        "(Documentation/blackfin/bfin-gpio-notes.txt)\n",
1075                        gpio, get_label(gpio));
1076
1077         reserve(gpio_irq, gpio);
1078         set_label(gpio, label);
1079
1080         hard_local_irq_restore(flags);
1081
1082         port_setup(gpio, GPIO_USAGE);
1083
1084         return 0;
1085 }
1086
1087 void bfin_gpio_irq_free(unsigned gpio)
1088 {
1089         unsigned long flags;
1090
1091         if (check_gpio(gpio) < 0)
1092                 return;
1093
1094         flags = hard_local_irq_save();
1095
1096         if (unlikely(!is_reserved(gpio_irq, gpio, 0))) {
1097                 if (system_state == SYSTEM_BOOTING)
1098                         dump_stack();
1099                 gpio_error(gpio);
1100                 hard_local_irq_restore(flags);
1101                 return;
1102         }
1103
1104         unreserve(gpio_irq, gpio);
1105
1106         set_label(gpio, "free");
1107
1108         hard_local_irq_restore(flags);
1109 }
1110
1111 static inline void __bfin_gpio_direction_input(unsigned gpio)
1112 {
1113 #ifdef CONFIG_BF54x
1114         gpio_array[gpio_bank(gpio)]->dir_clear = gpio_bit(gpio);
1115 #else
1116         gpio_array[gpio_bank(gpio)]->dir &= ~gpio_bit(gpio);
1117 #endif
1118         gpio_array[gpio_bank(gpio)]->inen |= gpio_bit(gpio);
1119 }
1120
1121 int bfin_gpio_direction_input(unsigned gpio)
1122 {
1123         unsigned long flags;
1124
1125         if (unlikely(!is_reserved(gpio, gpio, 0))) {
1126                 gpio_error(gpio);
1127                 return -EINVAL;
1128         }
1129
1130         flags = hard_local_irq_save();
1131         __bfin_gpio_direction_input(gpio);
1132         AWA_DUMMY_READ(inen);
1133         hard_local_irq_restore(flags);
1134
1135         return 0;
1136 }
1137 EXPORT_SYMBOL(bfin_gpio_direction_input);
1138
1139 void bfin_gpio_irq_prepare(unsigned gpio)
1140 {
1141 #ifdef CONFIG_BF54x
1142         unsigned long flags;
1143 #endif
1144
1145         port_setup(gpio, GPIO_USAGE);
1146
1147 #ifdef CONFIG_BF54x
1148         flags = hard_local_irq_save();
1149         __bfin_gpio_direction_input(gpio);
1150         hard_local_irq_restore(flags);
1151 #endif
1152 }
1153
1154 void bfin_gpio_set_value(unsigned gpio, int arg)
1155 {
1156         if (arg)
1157                 gpio_array[gpio_bank(gpio)]->data_set = gpio_bit(gpio);
1158         else
1159                 gpio_array[gpio_bank(gpio)]->data_clear = gpio_bit(gpio);
1160 }
1161 EXPORT_SYMBOL(bfin_gpio_set_value);
1162
1163 int bfin_gpio_direction_output(unsigned gpio, int value)
1164 {
1165         unsigned long flags;
1166
1167         if (unlikely(!is_reserved(gpio, gpio, 0))) {
1168                 gpio_error(gpio);
1169                 return -EINVAL;
1170         }
1171
1172         flags = hard_local_irq_save();
1173
1174         gpio_array[gpio_bank(gpio)]->inen &= ~gpio_bit(gpio);
1175         gpio_set_value(gpio, value);
1176 #ifdef CONFIG_BF54x
1177         gpio_array[gpio_bank(gpio)]->dir_set = gpio_bit(gpio);
1178 #else
1179         gpio_array[gpio_bank(gpio)]->dir |= gpio_bit(gpio);
1180 #endif
1181
1182         AWA_DUMMY_READ(dir);
1183         hard_local_irq_restore(flags);
1184
1185         return 0;
1186 }
1187 EXPORT_SYMBOL(bfin_gpio_direction_output);
1188
1189 int bfin_gpio_get_value(unsigned gpio)
1190 {
1191 #ifdef CONFIG_BF54x
1192         return (1 & (gpio_array[gpio_bank(gpio)]->data >> gpio_sub_n(gpio)));
1193 #else
1194         unsigned long flags;
1195
1196         if (unlikely(get_gpio_edge(gpio))) {
1197                 int ret;
1198                 flags = hard_local_irq_save();
1199                 set_gpio_edge(gpio, 0);
1200                 ret = get_gpio_data(gpio);
1201                 set_gpio_edge(gpio, 1);
1202                 hard_local_irq_restore(flags);
1203                 return ret;
1204         } else
1205                 return get_gpio_data(gpio);
1206 #endif
1207 }
1208 EXPORT_SYMBOL(bfin_gpio_get_value);
1209
1210 /* If we are booting from SPI and our board lacks a strong enough pull up,
1211  * the core can reset and execute the bootrom faster than the resistor can
1212  * pull the signal logically high.  To work around this (common) error in
1213  * board design, we explicitly set the pin back to GPIO mode, force /CS
1214  * high, and wait for the electrons to do their thing.
1215  *
1216  * This function only makes sense to be called from reset code, but it
1217  * lives here as we need to force all the GPIO states w/out going through
1218  * BUG() checks and such.
1219  */
1220 void bfin_reset_boot_spi_cs(unsigned short pin)
1221 {
1222         unsigned short gpio = P_IDENT(pin);
1223         port_setup(gpio, GPIO_USAGE);
1224         gpio_array[gpio_bank(gpio)]->data_set = gpio_bit(gpio);
1225         AWA_DUMMY_READ(data_set);
1226         udelay(1);
1227 }
1228
1229 #if defined(CONFIG_PROC_FS)
1230 static int gpio_proc_show(struct seq_file *m, void *v)
1231 {
1232         int c, irq, gpio;
1233
1234         for (c = 0; c < MAX_RESOURCES; c++) {
1235                 irq = is_reserved(gpio_irq, c, 1);
1236                 gpio = is_reserved(gpio, c, 1);
1237                 if (!check_gpio(c) && (gpio || irq))
1238                         seq_printf(m, "GPIO_%d: \t%s%s \t\tGPIO %s\n", c,
1239                                  get_label(c), (gpio && irq) ? " *" : "",
1240                                  get_gpio_dir(c) ? "OUTPUT" : "INPUT");
1241                 else if (is_reserved(peri, c, 1))
1242                         seq_printf(m, "GPIO_%d: \t%s \t\tPeripheral\n", c, get_label(c));
1243                 else
1244                         continue;
1245         }
1246
1247         return 0;
1248 }
1249
1250 static int gpio_proc_open(struct inode *inode, struct file *file)
1251 {
1252         return single_open(file, gpio_proc_show, NULL);
1253 }
1254
1255 static const struct file_operations gpio_proc_ops = {
1256         .open           = gpio_proc_open,
1257         .read           = seq_read,
1258         .llseek         = seq_lseek,
1259         .release        = single_release,
1260 };
1261
1262 static __init int gpio_register_proc(void)
1263 {
1264         struct proc_dir_entry *proc_gpio;
1265
1266         proc_gpio = proc_create("gpio", S_IRUGO, NULL, &gpio_proc_ops);
1267         return proc_gpio != NULL;
1268 }
1269 __initcall(gpio_register_proc);
1270 #endif
1271
1272 #ifdef CONFIG_GPIOLIB
1273 static int bfin_gpiolib_direction_input(struct gpio_chip *chip, unsigned gpio)
1274 {
1275         return bfin_gpio_direction_input(gpio);
1276 }
1277
1278 static int bfin_gpiolib_direction_output(struct gpio_chip *chip, unsigned gpio, int level)
1279 {
1280         return bfin_gpio_direction_output(gpio, level);
1281 }
1282
1283 static int bfin_gpiolib_get_value(struct gpio_chip *chip, unsigned gpio)
1284 {
1285         return bfin_gpio_get_value(gpio);
1286 }
1287
1288 static void bfin_gpiolib_set_value(struct gpio_chip *chip, unsigned gpio, int value)
1289 {
1290         return bfin_gpio_set_value(gpio, value);
1291 }
1292
1293 static int bfin_gpiolib_gpio_request(struct gpio_chip *chip, unsigned gpio)
1294 {
1295         return bfin_gpio_request(gpio, chip->label);
1296 }
1297
1298 static void bfin_gpiolib_gpio_free(struct gpio_chip *chip, unsigned gpio)
1299 {
1300         return bfin_gpio_free(gpio);
1301 }
1302
1303 static int bfin_gpiolib_gpio_to_irq(struct gpio_chip *chip, unsigned gpio)
1304 {
1305         return gpio + GPIO_IRQ_BASE;
1306 }
1307
1308 static struct gpio_chip bfin_chip = {
1309         .label                  = "BFIN-GPIO",
1310         .direction_input        = bfin_gpiolib_direction_input,
1311         .get                    = bfin_gpiolib_get_value,
1312         .direction_output       = bfin_gpiolib_direction_output,
1313         .set                    = bfin_gpiolib_set_value,
1314         .request                = bfin_gpiolib_gpio_request,
1315         .free                   = bfin_gpiolib_gpio_free,
1316         .to_irq                 = bfin_gpiolib_gpio_to_irq,
1317         .base                   = 0,
1318         .ngpio                  = MAX_BLACKFIN_GPIOS,
1319 };
1320
1321 static int __init bfin_gpiolib_setup(void)
1322 {
1323         return gpiochip_add(&bfin_chip);
1324 }
1325 arch_initcall(bfin_gpiolib_setup);
1326 #endif