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 2008 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      BF549/8/4/2
  32 *
  33 *  GPIO_0       PF0         PF0        PF0         PA0...PJ13
  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/delay.h>
  84 #include <linux/module.h>
  85 #include <linux/err.h>
  86 #include <linux/proc_fs.h>
  87 #include <asm/blackfin.h>
  88 #include <asm/gpio.h>
  89 #include <asm/portmux.h>
  90 #include <linux/irq.h>
  91
  92 #if ANOMALY_05000311 || ANOMALY_05000323
  93 enum {
  94         AWA_data = SYSCR,
  95         AWA_data_clear = SYSCR,
  96         AWA_data_set = SYSCR,
  97         AWA_toggle = SYSCR,
  98         AWA_maska = BFIN_UART_SCR,
  99         AWA_maska_clear = BFIN_UART_SCR,
 100         AWA_maska_set = BFIN_UART_SCR,
 101         AWA_maska_toggle = BFIN_UART_SCR,
 102         AWA_maskb = BFIN_UART_GCTL,
 103         AWA_maskb_clear = BFIN_UART_GCTL,
 104         AWA_maskb_set = BFIN_UART_GCTL,
 105         AWA_maskb_toggle = BFIN_UART_GCTL,
 106         AWA_dir = SPORT1_STAT,
 107         AWA_polar = SPORT1_STAT,
 108         AWA_edge = SPORT1_STAT,
 109         AWA_both = SPORT1_STAT,
 110 #if ANOMALY_05000311
 111         AWA_inen = TIMER_ENABLE,
 112 #elif ANOMALY_05000323
 113         AWA_inen = DMA1_1_CONFIG,
 114 #endif
 115 };
 116         /* Anomaly Workaround */
 117 #define AWA_DUMMY_READ(name) bfin_read16(AWA_ ## name)
 118 #else
 119 #define AWA_DUMMY_READ(...)  do { } while (0)
 120 #endif
 121
 122 #if defined(BF533_FAMILY) || defined(BF538_FAMILY)
 123 static struct gpio_port_t *gpio_bankb[gpio_bank(MAX_BLACKFIN_GPIOS)] = {
 124         (struct gpio_port_t *) FIO_FLAG_D,
 125 };
 126 #endif
 127
 128 #if defined(BF527_FAMILY) || defined(BF537_FAMILY) || defined(BF518_FAMILY)
 129 static struct gpio_port_t *gpio_bankb[gpio_bank(MAX_BLACKFIN_GPIOS)] = {
 130         (struct gpio_port_t *) PORTFIO,
 131         (struct gpio_port_t *) PORTGIO,
 132         (struct gpio_port_t *) PORTHIO,
 133 };
 134
 135 static unsigned short *port_fer[gpio_bank(MAX_BLACKFIN_GPIOS)] = {
 136         (unsigned short *) PORTF_FER,
 137         (unsigned short *) PORTG_FER,
 138         (unsigned short *) PORTH_FER,
 139 };
 140 #endif
 141
 142 #if defined(BF527_FAMILY) || defined(BF518_FAMILY)
 143 static unsigned short *port_mux[gpio_bank(MAX_BLACKFIN_GPIOS)] = {
 144         (unsigned short *) PORTF_MUX,
 145         (unsigned short *) PORTG_MUX,
 146         (unsigned short *) PORTH_MUX,
 147 };
 148
 149 static const
 150 u8 pmux_offset[][16] =
 151         {{ 0, 0, 0, 0, 0, 0, 0, 0, 2, 2, 4, 6, 8, 8, 10, 10 }, /* PORTF */
 152          { 0, 0, 0, 0, 0, 2, 2, 4, 4, 6, 8, 10, 10, 10, 12, 12 }, /* PORTG */
 153          { 0, 0, 0, 0, 0, 0, 0, 0, 2, 4, 4, 4, 4, 4, 4, 4 }, /* PORTH */
 154         };
 155 #endif
 156
 157 #ifdef BF561_FAMILY
 158 static struct gpio_port_t *gpio_bankb[gpio_bank(MAX_BLACKFIN_GPIOS)] = {
 159         (struct gpio_port_t *) FIO0_FLAG_D,
 160         (struct gpio_port_t *) FIO1_FLAG_D,
 161         (struct gpio_port_t *) FIO2_FLAG_D,
 162 };
 163 #endif
 164
 165 #ifdef BF548_FAMILY
 166 static struct gpio_port_t *gpio_array[gpio_bank(MAX_BLACKFIN_GPIOS)] = {
 167         (struct gpio_port_t *)PORTA_FER,
 168         (struct gpio_port_t *)PORTB_FER,
 169         (struct gpio_port_t *)PORTC_FER,
 170         (struct gpio_port_t *)PORTD_FER,
 171         (struct gpio_port_t *)PORTE_FER,
 172         (struct gpio_port_t *)PORTF_FER,
 173         (struct gpio_port_t *)PORTG_FER,
 174         (struct gpio_port_t *)PORTH_FER,
 175         (struct gpio_port_t *)PORTI_FER,
 176         (struct gpio_port_t *)PORTJ_FER,
 177 };
 178 #endif
 179
 180 static unsigned short reserved_gpio_map[gpio_bank(MAX_BLACKFIN_GPIOS)];
 181 static unsigned short reserved_peri_map[gpio_bank(MAX_RESOURCES)];
 182
 183 #define RESOURCE_LABEL_SIZE     16
 184
 185 static struct str_ident {
 186         char name[RESOURCE_LABEL_SIZE];
 187 } str_ident[MAX_RESOURCES];
 188
 189 #if defined(CONFIG_PM)
 190 #if defined(CONFIG_BF54x)
 191 static struct gpio_port_s gpio_bank_saved[gpio_bank(MAX_BLACKFIN_GPIOS)];
 192 #else
 193 static unsigned short wakeup_map[gpio_bank(MAX_BLACKFIN_GPIOS)];
 194 static unsigned char wakeup_flags_map[MAX_BLACKFIN_GPIOS];
 195 static struct gpio_port_s gpio_bank_saved[gpio_bank(MAX_BLACKFIN_GPIOS)];
 196
 197 #ifdef BF533_FAMILY
 198 static unsigned int sic_iwr_irqs[gpio_bank(MAX_BLACKFIN_GPIOS)] = {IRQ_PROG_INTB};
 199 #endif
 200
 201 #ifdef BF537_FAMILY
 202 static unsigned int sic_iwr_irqs[gpio_bank(MAX_BLACKFIN_GPIOS)] = {IRQ_PROG_INTB, IRQ_PORTG_INTB, IRQ_MAC_TX};
 203 #endif
 204
 205 #ifdef BF538_FAMILY
 206 static unsigned int sic_iwr_irqs[gpio_bank(MAX_BLACKFIN_GPIOS)] = {IRQ_PORTF_INTB};
 207 #endif
 208
 209 #if defined(BF527_FAMILY) || defined(BF518_FAMILY)
 210 static unsigned int sic_iwr_irqs[gpio_bank(MAX_BLACKFIN_GPIOS)] = {IRQ_PORTF_INTB, IRQ_PORTG_INTB, IRQ_PORTH_INTB};
 211 #endif
 212
 213 #ifdef BF561_FAMILY
 214 static unsigned int sic_iwr_irqs[gpio_bank(MAX_BLACKFIN_GPIOS)] = {IRQ_PROG0_INTB, IRQ_PROG1_INTB, IRQ_PROG2_INTB};
 215 #endif
 216 #endif
 217 #endif /* CONFIG_PM */
 218
 219 inline int check_gpio(unsigned gpio)
 220 {
 221 #if defined(BF548_FAMILY)
 222         if (gpio == GPIO_PB15 || gpio == GPIO_PC14 || gpio == GPIO_PC15
 223             || gpio == GPIO_PH14 || gpio == GPIO_PH15
 224             || gpio == GPIO_PJ14 || gpio == GPIO_PJ15)
 225                 return -EINVAL;
 226 #endif
 227         if (gpio >= MAX_BLACKFIN_GPIOS)
 228                 return -EINVAL;
 229         return 0;
 230 }
 231
 232 static void gpio_error(unsigned gpio)
 233 {
 234         printk(KERN_ERR "bfin-gpio: GPIO %d wasn't requested!\n", gpio);
 235 }
 236
 237 static void set_label(unsigned short ident, const char *label)
 238 {
 239         if (label) {
 240                 strncpy(str_ident[ident].name, label,
 241                          RESOURCE_LABEL_SIZE);
 242                 str_ident[ident].name[RESOURCE_LABEL_SIZE - 1] = 0;
 243         }
 244 }
 245
 246 static char *get_label(unsigned short ident)
 247 {
 248         return (*str_ident[ident].name ? str_ident[ident].name : "UNKNOWN");
 249 }
 250
 251 static int cmp_label(unsigned short ident, const char *label)
 252 {
 253         if (label == NULL) {
 254                 dump_stack();
 255                 printk(KERN_ERR "Please provide none-null label\n");
 256         }
 257
 258         if (label)
 259                 return strcmp(str_ident[ident].name, label);
 260         else
 261                 return -EINVAL;
 262 }
 263
 264 #if defined(BF527_FAMILY) || defined(BF537_FAMILY) || defined(BF518_FAMILY)
 265 static void port_setup(unsigned gpio, unsigned short usage)
 266 {
 267         if (!check_gpio(gpio)) {
 268                 if (usage == GPIO_USAGE)
 269                         *port_fer[gpio_bank(gpio)] &= ~gpio_bit(gpio);
 270                 else
 271                         *port_fer[gpio_bank(gpio)] |= gpio_bit(gpio);
 272                 SSYNC();
 273         }
 274 }
 275 #elif defined(BF548_FAMILY)
 276 static void port_setup(unsigned gpio, unsigned short usage)
 277 {
 278         if (usage == GPIO_USAGE)
 279                 gpio_array[gpio_bank(gpio)]->port_fer &= ~gpio_bit(gpio);
 280         else
 281                 gpio_array[gpio_bank(gpio)]->port_fer |= gpio_bit(gpio);
 282         SSYNC();
 283 }
 284 #else
 285 # define port_setup(...)  do { } while (0)
 286 #endif
 287
 288 #ifdef BF537_FAMILY
 289 static struct {
 290         unsigned short res;
 291         unsigned short offset;
 292 } port_mux_lut[] = {
 293         {.res = P_PPI0_D13, .offset = 11},
 294         {.res = P_PPI0_D14, .offset = 11},
 295         {.res = P_PPI0_D15, .offset = 11},
 296         {.res = P_SPORT1_TFS, .offset = 11},
 297         {.res = P_SPORT1_TSCLK, .offset = 11},
 298         {.res = P_SPORT1_DTPRI, .offset = 11},
 299         {.res = P_PPI0_D10, .offset = 10},
 300         {.res = P_PPI0_D11, .offset = 10},
 301         {.res = P_PPI0_D12, .offset = 10},
 302         {.res = P_SPORT1_RSCLK, .offset = 10},
 303         {.res = P_SPORT1_RFS, .offset = 10},
 304         {.res = P_SPORT1_DRPRI, .offset = 10},
 305         {.res = P_PPI0_D8, .offset = 9},
 306         {.res = P_PPI0_D9, .offset = 9},
 307         {.res = P_SPORT1_DRSEC, .offset = 9},
 308         {.res = P_SPORT1_DTSEC, .offset = 9},
 309         {.res = P_TMR2, .offset = 8},
 310         {.res = P_PPI0_FS3, .offset = 8},
 311         {.res = P_TMR3, .offset = 7},
 312         {.res = P_SPI0_SSEL4, .offset = 7},
 313         {.res = P_TMR4, .offset = 6},
 314         {.res = P_SPI0_SSEL5, .offset = 6},
 315         {.res = P_TMR5, .offset = 5},
 316         {.res = P_SPI0_SSEL6, .offset = 5},
 317         {.res = P_UART1_RX, .offset = 4},
 318         {.res = P_UART1_TX, .offset = 4},
 319         {.res = P_TMR6, .offset = 4},
 320         {.res = P_TMR7, .offset = 4},
 321         {.res = P_UART0_RX, .offset = 3},
 322         {.res = P_UART0_TX, .offset = 3},
 323         {.res = P_DMAR0, .offset = 3},
 324         {.res = P_DMAR1, .offset = 3},
 325         {.res = P_SPORT0_DTSEC, .offset = 1},
 326         {.res = P_SPORT0_DRSEC, .offset = 1},
 327         {.res = P_CAN0_RX, .offset = 1},
 328         {.res = P_CAN0_TX, .offset = 1},
 329         {.res = P_SPI0_SSEL7, .offset = 1},
 330         {.res = P_SPORT0_TFS, .offset = 0},
 331         {.res = P_SPORT0_DTPRI, .offset = 0},
 332         {.res = P_SPI0_SSEL2, .offset = 0},
 333         {.res = P_SPI0_SSEL3, .offset = 0},
 334 };
 335
 336 static void portmux_setup(unsigned short per, unsigned short function)
 337 {
 338         u16 y, offset, muxreg;
 339
 340         for (y = 0; y < ARRAY_SIZE(port_mux_lut); y++) {
 341                 if (port_mux_lut[y].res == per) {
 342
 343                         /* SET PORTMUX REG */
 344
 345                         offset = port_mux_lut[y].offset;
 346                         muxreg = bfin_read_PORT_MUX();
 347
 348                         if (offset != 1)
 349                                 muxreg &= ~(1 << offset);
 350                         else
 351                                 muxreg &= ~(3 << 1);
 352
 353                         muxreg |= (function << offset);
 354                         bfin_write_PORT_MUX(muxreg);
 355                 }
 356         }
 357 }
 358 #elif defined(BF548_FAMILY)
 359 inline void portmux_setup(unsigned short portno, unsigned short function)
 360 {
 361         u32 pmux;
 362
 363         pmux = gpio_array[gpio_bank(portno)]->port_mux;
 364
 365         pmux &= ~(0x3 << (2 * gpio_sub_n(portno)));
 366         pmux |= (function & 0x3) << (2 * gpio_sub_n(portno));
 367
 368         gpio_array[gpio_bank(portno)]->port_mux = pmux;
 369 }
 370
 371 inline u16 get_portmux(unsigned short portno)
 372 {
 373         u32 pmux;
 374
 375         pmux = gpio_array[gpio_bank(portno)]->port_mux;
 376
 377         return (pmux >> (2 * gpio_sub_n(portno)) & 0x3);
 378 }
 379 #elif defined(BF527_FAMILY) || defined(BF518_FAMILY)
 380 inline void portmux_setup(unsigned short portno, unsigned short function)
 381 {
 382         u16 pmux, ident = P_IDENT(portno);
 383         u8 offset = pmux_offset[gpio_bank(ident)][gpio_sub_n(ident)];
 384
 385         pmux = *port_mux[gpio_bank(ident)];
 386         pmux &= ~(3 << offset);
 387         pmux |= (function & 3) << offset;
 388         *port_mux[gpio_bank(ident)] = pmux;
 389         SSYNC();
 390 }
 391 #else
 392 # define portmux_setup(...)  do { } while (0)
 393 #endif
 394
 395 static int __init bfin_gpio_init(void)
 396 {
 397         printk(KERN_INFO "Blackfin GPIO Controller\n");
 398
 399         return 0;
 400 }
 401 arch_initcall(bfin_gpio_init);
 402
 403
 404 #ifndef BF548_FAMILY
 405 /***********************************************************
 406 *
 407 * FUNCTIONS: Blackfin General Purpose Ports Access Functions
 408 *
 409 * INPUTS/OUTPUTS:
 410 * gpio - GPIO Number between 0 and MAX_BLACKFIN_GPIOS
 411 *
 412 *
 413 * DESCRIPTION: These functions abstract direct register access
 414 *              to Blackfin processor General Purpose
 415 *              Ports Regsiters
 416 *
 417 * CAUTION: These functions do not belong to the GPIO Driver API
 418 *************************************************************
 419 * MODIFICATION HISTORY :
 420 **************************************************************/
 421
 422 /* Set a specific bit */
 423
 424 #define SET_GPIO(name) \
 425 void set_gpio_ ## name(unsigned gpio, unsigned short arg) \
 426 { \
 427         unsigned long flags; \
 428         local_irq_save(flags); \
 429         if (arg) \
 430                 gpio_bankb[gpio_bank(gpio)]->name |= gpio_bit(gpio); \
 431         else \
 432                 gpio_bankb[gpio_bank(gpio)]->name &= ~gpio_bit(gpio); \
 433         AWA_DUMMY_READ(name); \
 434         local_irq_restore(flags); \
 435 } \
 436 EXPORT_SYMBOL(set_gpio_ ## name);
 437
 438 SET_GPIO(dir)
 439 SET_GPIO(inen)
 440 SET_GPIO(polar)
 441 SET_GPIO(edge)
 442 SET_GPIO(both)
 443
 444
 445 #if ANOMALY_05000311 || ANOMALY_05000323
 446 #define SET_GPIO_SC(name) \
 447 void set_gpio_ ## name(unsigned gpio, unsigned short arg) \
 448 { \
 449         unsigned long flags; \
 450         local_irq_save(flags); \
 451         if (arg) \
 452                 gpio_bankb[gpio_bank(gpio)]->name ## _set = gpio_bit(gpio); \
 453         else \
 454                 gpio_bankb[gpio_bank(gpio)]->name ## _clear = gpio_bit(gpio); \
 455         AWA_DUMMY_READ(name); \
 456         local_irq_restore(flags); \
 457 } \
 458 EXPORT_SYMBOL(set_gpio_ ## name);
 459 #else
 460 #define SET_GPIO_SC(name) \
 461 void set_gpio_ ## name(unsigned gpio, unsigned short arg) \
 462 { \
 463         if (arg) \
 464                 gpio_bankb[gpio_bank(gpio)]->name ## _set = gpio_bit(gpio); \
 465         else \
 466                 gpio_bankb[gpio_bank(gpio)]->name ## _clear = gpio_bit(gpio); \
 467 } \
 468 EXPORT_SYMBOL(set_gpio_ ## name);
 469 #endif
 470
 471 SET_GPIO_SC(maska)
 472 SET_GPIO_SC(maskb)
 473 SET_GPIO_SC(data)
 474
 475 #if ANOMALY_05000311 || ANOMALY_05000323
 476 void set_gpio_toggle(unsigned gpio)
 477 {
 478         unsigned long flags;
 479         local_irq_save(flags);
 480         gpio_bankb[gpio_bank(gpio)]->toggle = gpio_bit(gpio);
 481         AWA_DUMMY_READ(toggle);
 482         local_irq_restore(flags);
 483 }
 484 #else
 485 void set_gpio_toggle(unsigned gpio)
 486 {
 487         gpio_bankb[gpio_bank(gpio)]->toggle = gpio_bit(gpio);
 488 }
 489 #endif
 490 EXPORT_SYMBOL(set_gpio_toggle);
 491
 492
 493 /*Set current PORT date (16-bit word)*/
 494
 495 #if ANOMALY_05000311 || ANOMALY_05000323
 496 #define SET_GPIO_P(name) \
 497 void set_gpiop_ ## name(unsigned gpio, unsigned short arg) \
 498 { \
 499         unsigned long flags; \
 500         local_irq_save(flags); \
 501         gpio_bankb[gpio_bank(gpio)]->name = arg; \
 502         AWA_DUMMY_READ(name); \
 503         local_irq_restore(flags); \
 504 } \
 505 EXPORT_SYMBOL(set_gpiop_ ## name);
 506 #else
 507 #define SET_GPIO_P(name) \
 508 void set_gpiop_ ## name(unsigned gpio, unsigned short arg) \
 509 { \
 510         gpio_bankb[gpio_bank(gpio)]->name = arg; \
 511 } \
 512 EXPORT_SYMBOL(set_gpiop_ ## name);
 513 #endif
 514
 515 SET_GPIO_P(data)
 516 SET_GPIO_P(dir)
 517 SET_GPIO_P(inen)
 518 SET_GPIO_P(polar)
 519 SET_GPIO_P(edge)
 520 SET_GPIO_P(both)
 521 SET_GPIO_P(maska)
 522 SET_GPIO_P(maskb)
 523
 524 /* Get a specific bit */
 525 #if ANOMALY_05000311 || ANOMALY_05000323
 526 #define GET_GPIO(name) \
 527 unsigned short get_gpio_ ## name(unsigned gpio) \
 528 { \
 529         unsigned long flags; \
 530         unsigned short ret; \
 531         local_irq_save(flags); \
 532         ret = 0x01 & (gpio_bankb[gpio_bank(gpio)]->name >> gpio_sub_n(gpio)); \
 533         AWA_DUMMY_READ(name); \
 534         local_irq_restore(flags); \
 535         return ret; \
 536 } \
 537 EXPORT_SYMBOL(get_gpio_ ## name);
 538 #else
 539 #define GET_GPIO(name) \
 540 unsigned short get_gpio_ ## name(unsigned gpio) \
 541 { \
 542         return (0x01 & (gpio_bankb[gpio_bank(gpio)]->name >> gpio_sub_n(gpio))); \
 543 } \
 544 EXPORT_SYMBOL(get_gpio_ ## name);
 545 #endif
 546
 547 GET_GPIO(data)
 548 GET_GPIO(dir)
 549 GET_GPIO(inen)
 550 GET_GPIO(polar)
 551 GET_GPIO(edge)
 552 GET_GPIO(both)
 553 GET_GPIO(maska)
 554 GET_GPIO(maskb)
 555
 556 /*Get current PORT date (16-bit word)*/
 557
 558 #if ANOMALY_05000311 || ANOMALY_05000323
 559 #define GET_GPIO_P(name) \
 560 unsigned short get_gpiop_ ## name(unsigned gpio) \
 561 { \
 562         unsigned long flags; \
 563         unsigned short ret; \
 564         local_irq_save(flags); \
 565         ret = (gpio_bankb[gpio_bank(gpio)]->name); \
 566         AWA_DUMMY_READ(name); \
 567         local_irq_restore(flags); \
 568         return ret; \
 569 } \
 570 EXPORT_SYMBOL(get_gpiop_ ## name);
 571 #else
 572 #define GET_GPIO_P(name) \
 573 unsigned short get_gpiop_ ## name(unsigned gpio) \
 574 { \
 575         return (gpio_bankb[gpio_bank(gpio)]->name);\
 576 } \
 577 EXPORT_SYMBOL(get_gpiop_ ## name);
 578 #endif
 579
 580 GET_GPIO_P(data)
 581 GET_GPIO_P(dir)
 582 GET_GPIO_P(inen)
 583 GET_GPIO_P(polar)
 584 GET_GPIO_P(edge)
 585 GET_GPIO_P(both)
 586 GET_GPIO_P(maska)
 587 GET_GPIO_P(maskb)
 588
 589
 590 #ifdef CONFIG_PM
 591 /***********************************************************
 592 *
 593 * FUNCTIONS: Blackfin PM Setup API
 594 *
 595 * INPUTS/OUTPUTS:
 596 * gpio - GPIO Number between 0 and MAX_BLACKFIN_GPIOS
 597 * type -
 598 *       PM_WAKE_RISING
 599 *       PM_WAKE_FALLING
 600 *       PM_WAKE_HIGH
 601 *       PM_WAKE_LOW
 602 *       PM_WAKE_BOTH_EDGES
 603 *
 604 * DESCRIPTION: Blackfin PM Driver API
 605 *
 606 * CAUTION:
 607 *************************************************************
 608 * MODIFICATION HISTORY :
 609 **************************************************************/
 610 int gpio_pm_wakeup_request(unsigned gpio, unsigned char type)
 611 {
 612         unsigned long flags;
 613
 614         if ((check_gpio(gpio) < 0) || !type)
 615                 return -EINVAL;
 616
 617         local_irq_save(flags);
 618         wakeup_map[gpio_bank(gpio)] |= gpio_bit(gpio);
 619         wakeup_flags_map[gpio] = type;
 620         local_irq_restore(flags);
 621
 622         return 0;
 623 }
 624 EXPORT_SYMBOL(gpio_pm_wakeup_request);
 625
 626 void gpio_pm_wakeup_free(unsigned gpio)
 627 {
 628         unsigned long flags;
 629
 630         if (check_gpio(gpio) < 0)
 631                 return;
 632
 633         local_irq_save(flags);
 634
 635         wakeup_map[gpio_bank(gpio)] &= ~gpio_bit(gpio);
 636
 637         local_irq_restore(flags);
 638 }
 639 EXPORT_SYMBOL(gpio_pm_wakeup_free);
 640
 641 static int bfin_gpio_wakeup_type(unsigned gpio, unsigned char type)
 642 {
 643         port_setup(gpio, GPIO_USAGE);
 644         set_gpio_dir(gpio, 0);
 645         set_gpio_inen(gpio, 1);
 646
 647         if (type & (PM_WAKE_RISING | PM_WAKE_FALLING))
 648                 set_gpio_edge(gpio, 1);
 649          else
 650                 set_gpio_edge(gpio, 0);
 651
 652         if ((type & (PM_WAKE_BOTH_EDGES)) == (PM_WAKE_BOTH_EDGES))
 653                 set_gpio_both(gpio, 1);
 654         else
 655                 set_gpio_both(gpio, 0);
 656
 657         if ((type & (PM_WAKE_FALLING | PM_WAKE_LOW)))
 658                 set_gpio_polar(gpio, 1);
 659         else
 660                 set_gpio_polar(gpio, 0);
 661
 662         SSYNC();
 663
 664         return 0;
 665 }
 666
 667 u32 bfin_pm_standby_setup(void)
 668 {
 669         u16 bank, mask, i, gpio;
 670
 671         for (i = 0; i < MAX_BLACKFIN_GPIOS; i += GPIO_BANKSIZE) {
 672                 mask = wakeup_map[gpio_bank(i)];
 673                 bank = gpio_bank(i);
 674
 675                 gpio_bank_saved[bank].maskb = gpio_bankb[bank]->maskb;
 676                 gpio_bankb[bank]->maskb = 0;
 677
 678                 if (mask) {
 679 #if defined(BF527_FAMILY) || defined(BF537_FAMILY) || defined(BF518_FAMILY)
 680                         gpio_bank_saved[bank].fer   = *port_fer[bank];
 681 #endif
 682                         gpio_bank_saved[bank].inen  = gpio_bankb[bank]->inen;
 683                         gpio_bank_saved[bank].polar = gpio_bankb[bank]->polar;
 684                         gpio_bank_saved[bank].dir   = gpio_bankb[bank]->dir;
 685                         gpio_bank_saved[bank].edge  = gpio_bankb[bank]->edge;
 686                         gpio_bank_saved[bank].both  = gpio_bankb[bank]->both;
 687                         gpio_bank_saved[bank].reserved =
 688                                                 reserved_gpio_map[bank];
 689
 690                         gpio = i;
 691
 692                         while (mask) {
 693                                 if ((mask & 1) && (wakeup_flags_map[gpio] !=
 694                                         PM_WAKE_IGNORE)) {
 695                                         reserved_gpio_map[gpio_bank(gpio)] |=
 696                                                         gpio_bit(gpio);
 697                                         bfin_gpio_wakeup_type(gpio,
 698                                                 wakeup_flags_map[gpio]);
 699                                         set_gpio_data(gpio, 0); /*Clear*/
 700                                 }
 701                                 gpio++;
 702                                 mask >>= 1;
 703                         }
 704
 705                         bfin_internal_set_wake(sic_iwr_irqs[bank], 1);
 706                         gpio_bankb[bank]->maskb_set = wakeup_map[gpio_bank(i)];
 707                 }
 708         }
 709
 710         AWA_DUMMY_READ(maskb_set);
 711
 712         return 0;
 713 }
 714
 715 void bfin_pm_standby_restore(void)
 716 {
 717         u16 bank, mask, i;
 718
 719         for (i = 0; i < MAX_BLACKFIN_GPIOS; i += GPIO_BANKSIZE) {
 720                 mask = wakeup_map[gpio_bank(i)];
 721                 bank = gpio_bank(i);
 722
 723                 if (mask) {
 724 #if defined(BF527_FAMILY) || defined(BF537_FAMILY) || defined(BF518_FAMILY)
 725                         *port_fer[bank]         = gpio_bank_saved[bank].fer;
 726 #endif
 727                         gpio_bankb[bank]->inen  = gpio_bank_saved[bank].inen;
 728                         gpio_bankb[bank]->dir   = gpio_bank_saved[bank].dir;
 729                         gpio_bankb[bank]->polar = gpio_bank_saved[bank].polar;
 730                         gpio_bankb[bank]->edge  = gpio_bank_saved[bank].edge;
 731                         gpio_bankb[bank]->both  = gpio_bank_saved[bank].both;
 732
 733                         reserved_gpio_map[bank] =
 734                                         gpio_bank_saved[bank].reserved;
 735                         bfin_internal_set_wake(sic_iwr_irqs[bank], 0);
 736                 }
 737
 738                 gpio_bankb[bank]->maskb = gpio_bank_saved[bank].maskb;
 739         }
 740         AWA_DUMMY_READ(maskb);
 741 }
 742
 743 void bfin_gpio_pm_hibernate_suspend(void)
 744 {
 745         int i, bank;
 746
 747         for (i = 0; i < MAX_BLACKFIN_GPIOS; i += GPIO_BANKSIZE) {
 748                 bank = gpio_bank(i);
 749
 750 #if defined(BF527_FAMILY) || defined(BF537_FAMILY) || defined(BF518_FAMILY)
 751                         gpio_bank_saved[bank].fer   = *port_fer[bank];
 752 #if defined(BF527_FAMILY) || defined(BF518_FAMILY)
 753                         gpio_bank_saved[bank].mux   = *port_mux[bank];
 754 #else
 755                         if (bank == 0)
 756                                 gpio_bank_saved[bank].mux   = bfin_read_PORT_MUX();
 757 #endif
 758 #endif
 759                         gpio_bank_saved[bank].data  = gpio_bankb[bank]->data;
 760                         gpio_bank_saved[bank].inen  = gpio_bankb[bank]->inen;
 761                         gpio_bank_saved[bank].polar = gpio_bankb[bank]->polar;
 762                         gpio_bank_saved[bank].dir   = gpio_bankb[bank]->dir;
 763                         gpio_bank_saved[bank].edge  = gpio_bankb[bank]->edge;
 764                         gpio_bank_saved[bank].both  = gpio_bankb[bank]->both;
 765                         gpio_bank_saved[bank].maska  = gpio_bankb[bank]->maska;
 766         }
 767
 768         AWA_DUMMY_READ(maska);
 769 }
 770
 771 void bfin_gpio_pm_hibernate_restore(void)
 772 {
 773         int i, bank;
 774
 775         for (i = 0; i < MAX_BLACKFIN_GPIOS; i += GPIO_BANKSIZE) {
 776                         bank = gpio_bank(i);
 777
 778 #if defined(BF527_FAMILY) || defined(BF537_FAMILY) || defined(BF518_FAMILY)
 779 #if defined(BF527_FAMILY) || defined(BF518_FAMILY)
 780                         *port_mux[bank] = gpio_bank_saved[bank].mux;
 781 #else
 782                         if (bank == 0)
 783                                 bfin_write_PORT_MUX(gpio_bank_saved[bank].mux);
 784 #endif
 785                         *port_fer[bank]         = gpio_bank_saved[bank].fer;
 786 #endif
 787                         gpio_bankb[bank]->inen  = gpio_bank_saved[bank].inen;
 788                         gpio_bankb[bank]->dir   = gpio_bank_saved[bank].dir;
 789                         gpio_bankb[bank]->polar = gpio_bank_saved[bank].polar;
 790                         gpio_bankb[bank]->edge  = gpio_bank_saved[bank].edge;
 791                         gpio_bankb[bank]->both  = gpio_bank_saved[bank].both;
 792
 793                         gpio_bankb[bank]->data_set = gpio_bank_saved[bank].data
 794                                                         | gpio_bank_saved[bank].dir;
 795
 796                         gpio_bankb[bank]->maska = gpio_bank_saved[bank].maska;
 797         }
 798         AWA_DUMMY_READ(maska);
 799 }
 800
 801
 802 #endif
 803 #else /* BF548_FAMILY */
 804 #ifdef CONFIG_PM
 805
 806 u32 bfin_pm_standby_setup(void)
 807 {
 808         return 0;
 809 }
 810
 811 void bfin_pm_standby_restore(void)
 812 {
 813
 814 }
 815
 816 void bfin_gpio_pm_hibernate_suspend(void)
 817 {
 818         int i, bank;
 819
 820         for (i = 0; i < MAX_BLACKFIN_GPIOS; i += GPIO_BANKSIZE) {
 821                 bank = gpio_bank(i);
 822
 823                         gpio_bank_saved[bank].fer  = gpio_array[bank]->port_fer;
 824                         gpio_bank_saved[bank].mux  = gpio_array[bank]->port_mux;
 825                         gpio_bank_saved[bank].data  = gpio_array[bank]->port_data;
 826                         gpio_bank_saved[bank].data  = gpio_array[bank]->port_data;
 827                         gpio_bank_saved[bank].inen  = gpio_array[bank]->port_inen;
 828                         gpio_bank_saved[bank].dir   = gpio_array[bank]->port_dir_set;
 829         }
 830 }
 831
 832 void bfin_gpio_pm_hibernate_restore(void)
 833 {
 834         int i, bank;
 835
 836         for (i = 0; i < MAX_BLACKFIN_GPIOS; i += GPIO_BANKSIZE) {
 837                         bank = gpio_bank(i);
 838
 839                         gpio_array[bank]->port_mux  = gpio_bank_saved[bank].mux;
 840                         gpio_array[bank]->port_fer  = gpio_bank_saved[bank].fer;
 841                         gpio_array[bank]->port_inen  = gpio_bank_saved[bank].inen;
 842                         gpio_array[bank]->port_dir_set   = gpio_bank_saved[bank].dir;
 843                         gpio_array[bank]->port_set = gpio_bank_saved[bank].data
 844                                                         | gpio_bank_saved[bank].dir;
 845         }
 846 }
 847 #endif
 848
 849 unsigned short get_gpio_dir(unsigned gpio)
 850 {
 851         return (0x01 & (gpio_array[gpio_bank(gpio)]->port_dir_clear >> gpio_sub_n(gpio)));
 852 }
 853 EXPORT_SYMBOL(get_gpio_dir);
 854
 855 #endif /* BF548_FAMILY */
 856
 857 /***********************************************************
 858 *
 859 * FUNCTIONS:    Blackfin Peripheral Resource Allocation
 860 *               and PortMux Setup
 861 *
 862 * INPUTS/OUTPUTS:
 863 * per   Peripheral Identifier
 864 * label String
 865 *
 866 * DESCRIPTION: Blackfin Peripheral Resource Allocation and Setup API
 867 *
 868 * CAUTION:
 869 *************************************************************
 870 * MODIFICATION HISTORY :
 871 **************************************************************/
 872
 873 #ifdef BF548_FAMILY
 874 int peripheral_request(unsigned short per, const char *label)
 875 {
 876         unsigned long flags;
 877         unsigned short ident = P_IDENT(per);
 878
 879         /*
 880          * Don't cares are pins with only one dedicated function
 881          */
 882
 883         if (per & P_DONTCARE)
 884                 return 0;
 885
 886         if (!(per & P_DEFINED))
 887                 return -ENODEV;
 888
 889         if (check_gpio(ident) < 0)
 890                 return -EINVAL;
 891
 892         local_irq_save(flags);
 893
 894         if (unlikely(reserved_gpio_map[gpio_bank(ident)] & gpio_bit(ident))) {
 895                 dump_stack();
 896                 printk(KERN_ERR
 897                     "%s: Peripheral %d is already reserved as GPIO by %s !\n",
 898                        __func__, ident, get_label(ident));
 899                 local_irq_restore(flags);
 900                 return -EBUSY;
 901         }
 902
 903         if (unlikely(reserved_peri_map[gpio_bank(ident)] & gpio_bit(ident))) {
 904
 905                 u16 funct = get_portmux(ident);
 906
 907                 /*
 908                  * Pin functions like AMC address strobes my
 909                  * be requested and used by several drivers
 910                  */
 911
 912                 if (!((per & P_MAYSHARE) && (funct == P_FUNCT2MUX(per)))) {
 913
 914                         /*
 915                          * Allow that the identical pin function can
 916                          * be requested from the same driver twice
 917                          */
 918
 919                         if (cmp_label(ident, label) == 0)
 920                                 goto anyway;
 921
 922                         dump_stack();
 923                         printk(KERN_ERR
 924                                "%s: Peripheral %d function %d is already reserved by %s !\n",
 925                                __func__, ident, P_FUNCT2MUX(per), get_label(ident));
 926                         local_irq_restore(flags);
 927                         return -EBUSY;
 928                 }
 929         }
 930
 931  anyway:
 932         reserved_peri_map[gpio_bank(ident)] |= gpio_bit(ident);
 933
 934         portmux_setup(ident, P_FUNCT2MUX(per));
 935         port_setup(ident, PERIPHERAL_USAGE);
 936
 937         local_irq_restore(flags);
 938         set_label(ident, label);
 939
 940         return 0;
 941 }
 942 EXPORT_SYMBOL(peripheral_request);
 943 #else
 944
 945 int peripheral_request(unsigned short per, const char *label)
 946 {
 947         unsigned long flags;
 948         unsigned short ident = P_IDENT(per);
 949
 950         /*
 951          * Don't cares are pins with only one dedicated function
 952          */
 953
 954         if (per & P_DONTCARE)
 955                 return 0;
 956
 957         if (!(per & P_DEFINED))
 958                 return -ENODEV;
 959
 960         local_irq_save(flags);
 961
 962         if (!check_gpio(ident)) {
 963
 964                 if (unlikely(reserved_gpio_map[gpio_bank(ident)] & gpio_bit(ident))) {
 965                         dump_stack();
 966                         printk(KERN_ERR
 967                                "%s: Peripheral %d is already reserved as GPIO by %s !\n",
 968                                __func__, ident, get_label(ident));
 969                         local_irq_restore(flags);
 970                         return -EBUSY;
 971                 }
 972
 973         }
 974
 975         if (unlikely(reserved_peri_map[gpio_bank(ident)] & gpio_bit(ident))) {
 976
 977                 /*
 978                  * Pin functions like AMC address strobes my
 979                  * be requested and used by several drivers
 980                  */
 981
 982                 if (!(per & P_MAYSHARE)) {
 983
 984                         /*
 985                          * Allow that the identical pin function can
 986                          * be requested from the same driver twice
 987                          */
 988
 989                         if (cmp_label(ident, label) == 0)
 990                                 goto anyway;
 991
 992                         dump_stack();
 993                         printk(KERN_ERR
 994                                "%s: Peripheral %d function %d is already"
 995                                " reserved by %s !\n",
 996                                __func__, ident, P_FUNCT2MUX(per),
 997                                 get_label(ident));
 998                         local_irq_restore(flags);
 999                         return -EBUSY;
1000                 }
1001
1002         }
1003
1004  anyway:
1005         portmux_setup(per, P_FUNCT2MUX(per));
1006
1007         port_setup(ident, PERIPHERAL_USAGE);
1008
1009         reserved_peri_map[gpio_bank(ident)] |= gpio_bit(ident);
1010         local_irq_restore(flags);
1011         set_label(ident, label);
1012
1013         return 0;
1014 }
1015 EXPORT_SYMBOL(peripheral_request);
1016 #endif
1017
1018 int peripheral_request_list(const unsigned short per[], const char *label)
1019 {
1020         u16 cnt;
1021         int ret;
1022
1023         for (cnt = 0; per[cnt] != 0; cnt++) {
1024
1025                 ret = peripheral_request(per[cnt], label);
1026
1027                 if (ret < 0) {
1028                         for ( ; cnt > 0; cnt--)
1029                                 peripheral_free(per[cnt - 1]);
1030
1031                         return ret;
1032                 }
1033         }
1034
1035         return 0;
1036 }
1037 EXPORT_SYMBOL(peripheral_request_list);
1038
1039 void peripheral_free(unsigned short per)
1040 {
1041         unsigned long flags;
1042         unsigned short ident = P_IDENT(per);
1043
1044         if (per & P_DONTCARE)
1045                 return;
1046
1047         if (!(per & P_DEFINED))
1048                 return;
1049
1050         if (check_gpio(ident) < 0)
1051                 return;
1052
1053         local_irq_save(flags);
1054
1055         if (unlikely(!(reserved_peri_map[gpio_bank(ident)] & gpio_bit(ident)))) {
1056                 local_irq_restore(flags);
1057                 return;
1058         }
1059
1060         if (!(per & P_MAYSHARE))
1061                 port_setup(ident, GPIO_USAGE);
1062
1063         reserved_peri_map[gpio_bank(ident)] &= ~gpio_bit(ident);
1064
1065         set_label(ident, "free");
1066
1067         local_irq_restore(flags);
1068 }
1069 EXPORT_SYMBOL(peripheral_free);
1070
1071 void peripheral_free_list(const unsigned short per[])
1072 {
1073         u16 cnt;
1074         for (cnt = 0; per[cnt] != 0; cnt++)
1075                 peripheral_free(per[cnt]);
1076 }
1077 EXPORT_SYMBOL(peripheral_free_list);
1078
1079 /***********************************************************
1080 *
1081 * FUNCTIONS: Blackfin GPIO Driver
1082 *
1083 * INPUTS/OUTPUTS:
1084 * gpio  PIO Number between 0 and MAX_BLACKFIN_GPIOS
1085 * label String
1086 *
1087 * DESCRIPTION: Blackfin GPIO Driver API
1088 *
1089 * CAUTION:
1090 *************************************************************
1091 * MODIFICATION HISTORY :
1092 **************************************************************/
1093
1094 int gpio_request(unsigned gpio, const char *label)
1095 {
1096         unsigned long flags;
1097
1098         if (check_gpio(gpio) < 0)
1099                 return -EINVAL;
1100
1101         local_irq_save(flags);
1102
1103         /*
1104          * Allow that the identical GPIO can
1105          * be requested from the same driver twice
1106          * Do nothing and return -
1107          */
1108
1109         if (cmp_label(gpio, label) == 0) {
1110                 local_irq_restore(flags);
1111                 return 0;
1112         }
1113
1114         if (unlikely(reserved_gpio_map[gpio_bank(gpio)] & gpio_bit(gpio))) {
1115                 dump_stack();
1116                 printk(KERN_ERR "bfin-gpio: GPIO %d is already reserved by %s !\n",
1117                          gpio, get_label(gpio));
1118                 local_irq_restore(flags);
1119                 return -EBUSY;
1120         }
1121         if (unlikely(reserved_peri_map[gpio_bank(gpio)] & gpio_bit(gpio))) {
1122                 dump_stack();
1123                 printk(KERN_ERR
1124                        "bfin-gpio: GPIO %d is already reserved as Peripheral by %s !\n",
1125                        gpio, get_label(gpio));
1126                 local_irq_restore(flags);
1127                 return -EBUSY;
1128         }
1129
1130         reserved_gpio_map[gpio_bank(gpio)] |= gpio_bit(gpio);
1131
1132         local_irq_restore(flags);
1133
1134         port_setup(gpio, GPIO_USAGE);
1135         set_label(gpio, label);
1136
1137         return 0;
1138 }
1139 EXPORT_SYMBOL(gpio_request);
1140
1141 void gpio_free(unsigned gpio)
1142 {
1143         unsigned long flags;
1144
1145         if (check_gpio(gpio) < 0)
1146                 return;
1147
1148         local_irq_save(flags);
1149
1150         if (unlikely(!(reserved_gpio_map[gpio_bank(gpio)] & gpio_bit(gpio)))) {
1151                 dump_stack();
1152                 gpio_error(gpio);
1153                 local_irq_restore(flags);
1154                 return;
1155         }
1156
1157         reserved_gpio_map[gpio_bank(gpio)] &= ~gpio_bit(gpio);
1158
1159         set_label(gpio, "free");
1160
1161         local_irq_restore(flags);
1162 }
1163 EXPORT_SYMBOL(gpio_free);
1164
1165
1166 #ifdef BF548_FAMILY
1167 int gpio_direction_input(unsigned gpio)
1168 {
1169         unsigned long flags;
1170
1171         if (!(reserved_gpio_map[gpio_bank(gpio)] & gpio_bit(gpio))) {
1172                 gpio_error(gpio);
1173                 return -EINVAL;
1174         }
1175
1176         local_irq_save(flags);
1177         gpio_array[gpio_bank(gpio)]->port_dir_clear = gpio_bit(gpio);
1178         gpio_array[gpio_bank(gpio)]->port_inen |= gpio_bit(gpio);
1179         local_irq_restore(flags);
1180
1181         return 0;
1182 }
1183 EXPORT_SYMBOL(gpio_direction_input);
1184
1185 int gpio_direction_output(unsigned gpio, int value)
1186 {
1187         unsigned long flags;
1188
1189         if (!(reserved_gpio_map[gpio_bank(gpio)] & gpio_bit(gpio))) {
1190                 gpio_error(gpio);
1191                 return -EINVAL;
1192         }
1193
1194         local_irq_save(flags);
1195         gpio_array[gpio_bank(gpio)]->port_inen &= ~gpio_bit(gpio);
1196         gpio_set_value(gpio, value);
1197         gpio_array[gpio_bank(gpio)]->port_dir_set = gpio_bit(gpio);
1198         local_irq_restore(flags);
1199
1200         return 0;
1201 }
1202 EXPORT_SYMBOL(gpio_direction_output);
1203
1204 void gpio_set_value(unsigned gpio, int arg)
1205 {
1206         if (arg)
1207                 gpio_array[gpio_bank(gpio)]->port_set = gpio_bit(gpio);
1208         else
1209                 gpio_array[gpio_bank(gpio)]->port_clear = gpio_bit(gpio);
1210 }
1211 EXPORT_SYMBOL(gpio_set_value);
1212
1213 int gpio_get_value(unsigned gpio)
1214 {
1215         return (1 & (gpio_array[gpio_bank(gpio)]->port_data >> gpio_sub_n(gpio)));
1216 }
1217 EXPORT_SYMBOL(gpio_get_value);
1218
1219 void bfin_gpio_irq_prepare(unsigned gpio)
1220 {
1221         unsigned long flags;
1222
1223         port_setup(gpio, GPIO_USAGE);
1224
1225         local_irq_save(flags);
1226         gpio_array[gpio_bank(gpio)]->port_dir_clear = gpio_bit(gpio);
1227         gpio_array[gpio_bank(gpio)]->port_inen |= gpio_bit(gpio);
1228         local_irq_restore(flags);
1229 }
1230
1231 #else
1232
1233 int gpio_get_value(unsigned gpio)
1234 {
1235         unsigned long flags;
1236         int ret;
1237
1238         if (unlikely(get_gpio_edge(gpio))) {
1239                 local_irq_save(flags);
1240                 set_gpio_edge(gpio, 0);
1241                 ret = get_gpio_data(gpio);
1242                 set_gpio_edge(gpio, 1);
1243                 local_irq_restore(flags);
1244
1245                 return ret;
1246         } else
1247                 return get_gpio_data(gpio);
1248 }
1249 EXPORT_SYMBOL(gpio_get_value);
1250
1251
1252 int gpio_direction_input(unsigned gpio)
1253 {
1254         unsigned long flags;
1255
1256         if (!(reserved_gpio_map[gpio_bank(gpio)] & gpio_bit(gpio))) {
1257                 gpio_error(gpio);
1258                 return -EINVAL;
1259         }
1260
1261         local_irq_save(flags);
1262         gpio_bankb[gpio_bank(gpio)]->dir &= ~gpio_bit(gpio);
1263         gpio_bankb[gpio_bank(gpio)]->inen |= gpio_bit(gpio);
1264         AWA_DUMMY_READ(inen);
1265         local_irq_restore(flags);
1266
1267         return 0;
1268 }
1269 EXPORT_SYMBOL(gpio_direction_input);
1270
1271 int gpio_direction_output(unsigned gpio, int value)
1272 {
1273         unsigned long flags;
1274
1275         if (!(reserved_gpio_map[gpio_bank(gpio)] & gpio_bit(gpio))) {
1276                 gpio_error(gpio);
1277                 return -EINVAL;
1278         }
1279
1280         local_irq_save(flags);
1281         gpio_bankb[gpio_bank(gpio)]->inen &= ~gpio_bit(gpio);
1282
1283         if (value)
1284                 gpio_bankb[gpio_bank(gpio)]->data_set = gpio_bit(gpio);
1285         else
1286                 gpio_bankb[gpio_bank(gpio)]->data_clear = gpio_bit(gpio);
1287
1288         gpio_bankb[gpio_bank(gpio)]->dir |= gpio_bit(gpio);
1289         AWA_DUMMY_READ(dir);
1290         local_irq_restore(flags);
1291
1292         return 0;
1293 }
1294 EXPORT_SYMBOL(gpio_direction_output);
1295
1296 /* If we are booting from SPI and our board lacks a strong enough pull up,
1297  * the core can reset and execute the bootrom faster than the resistor can
1298  * pull the signal logically high.  To work around this (common) error in
1299  * board design, we explicitly set the pin back to GPIO mode, force /CS
1300  * high, and wait for the electrons to do their thing.
1301  *
1302  * This function only makes sense to be called from reset code, but it
1303  * lives here as we need to force all the GPIO states w/out going through
1304  * BUG() checks and such.
1305  */
1306 void bfin_gpio_reset_spi0_ssel1(void)
1307 {
1308         u16 gpio = P_IDENT(P_SPI0_SSEL1);
1309
1310         port_setup(gpio, GPIO_USAGE);
1311         gpio_bankb[gpio_bank(gpio)]->data_set = gpio_bit(gpio);
1312         AWA_DUMMY_READ(data_set);
1313         udelay(1);
1314 }
1315
1316 void bfin_gpio_irq_prepare(unsigned gpio)
1317 {
1318         port_setup(gpio, GPIO_USAGE);
1319 }
1320
1321 #endif /*BF548_FAMILY */
1322
1323 #if defined(CONFIG_PROC_FS)
1324 static int gpio_proc_read(char *buf, char **start, off_t offset,
1325                           int len, int *unused_i, void *unused_v)
1326 {
1327         int c, outlen = 0;
1328
1329         for (c = 0; c < MAX_RESOURCES; c++) {
1330                 if (!check_gpio(c) && (reserved_gpio_map[gpio_bank(c)] & gpio_bit(c)))
1331                         len = sprintf(buf, "GPIO_%d: %s \t\tGPIO %s\n", c,
1332                                  get_label(c), get_gpio_dir(c) ? "OUTPUT" : "INPUT");
1333                 else if (reserved_peri_map[gpio_bank(c)] & gpio_bit(c))
1334                         len = sprintf(buf, "GPIO_%d: %s \t\tPeripheral\n", c, get_label(c));
1335                 else
1336                         continue;
1337                 buf += len;
1338                 outlen += len;
1339         }
1340         return outlen;
1341 }
1342
1343 static __init int gpio_register_proc(void)
1344 {
1345         struct proc_dir_entry *proc_gpio;
1346
1347         proc_gpio = create_proc_entry("gpio", S_IRUGO, NULL);
1348         if (proc_gpio)
1349                 proc_gpio->read_proc = gpio_proc_read;
1350         return proc_gpio != NULL;
1351 }
1352 __initcall(gpio_register_proc);
1353 #endif