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