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 = UART_SCR,
  99         AWA_maska_clear = UART_SCR,
 100         AWA_maska_set = UART_SCR,
 101         AWA_maska_toggle = UART_SCR,
 102         AWA_maskb = UART_GCTL,
 103         AWA_maskb_clear = UART_GCTL,
 104         AWA_maskb_set = UART_GCTL,
 105         AWA_maskb_toggle = 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 #ifdef BF533_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)
 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 #ifdef BF527_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) && !defined(CONFIG_BF54x)
 190 static unsigned short wakeup_map[gpio_bank(MAX_BLACKFIN_GPIOS)];
 191 static unsigned char wakeup_flags_map[MAX_BLACKFIN_GPIOS];
 192 static struct gpio_port_s gpio_bank_saved[gpio_bank(MAX_BLACKFIN_GPIOS)];
 193
 194 #ifdef BF533_FAMILY
 195 static unsigned int sic_iwr_irqs[gpio_bank(MAX_BLACKFIN_GPIOS)] = {IRQ_PROG_INTB};
 196 #endif
 197
 198 #ifdef BF537_FAMILY
 199 static unsigned int sic_iwr_irqs[gpio_bank(MAX_BLACKFIN_GPIOS)] = {IRQ_PROG_INTB, IRQ_PORTG_INTB, IRQ_MAC_TX};
 200 #endif
 201
 202 #ifdef BF527_FAMILY
 203 static unsigned int sic_iwr_irqs[gpio_bank(MAX_BLACKFIN_GPIOS)] = {IRQ_PORTF_INTB, IRQ_PORTG_INTB, IRQ_PORTH_INTB};
 204 #endif
 205
 206 #ifdef BF561_FAMILY
 207 static unsigned int sic_iwr_irqs[gpio_bank(MAX_BLACKFIN_GPIOS)] = {IRQ_PROG0_INTB, IRQ_PROG1_INTB, IRQ_PROG2_INTB};
 208 #endif
 209
 210 #endif /* CONFIG_PM */
 211
 212 #if defined(BF548_FAMILY)
 213 inline int check_gpio(unsigned gpio)
 214 {
 215         if (gpio == GPIO_PB15 || gpio == GPIO_PC14 || gpio == GPIO_PC15
 216             || gpio == GPIO_PH14 || gpio == GPIO_PH15
 217             || gpio == GPIO_PJ14 || gpio == GPIO_PJ15
 218             || gpio > MAX_BLACKFIN_GPIOS)
 219                 return -EINVAL;
 220         return 0;
 221 }
 222 #else
 223 inline int check_gpio(unsigned gpio)
 224 {
 225         if (gpio >= MAX_BLACKFIN_GPIOS)
 226                 return -EINVAL;
 227         return 0;
 228 }
 229 #endif
 230
 231 void gpio_error(unsigned gpio)
 232 {
 233         printk(KERN_ERR "bfin-gpio: GPIO %d wasn't requested!\n", gpio);
 234 }
 235
 236 static void set_label(unsigned short ident, const char *label)
 237 {
 238         if (label && str_ident) {
 239                 strncpy(str_ident[ident].name, label,
 240                          RESOURCE_LABEL_SIZE);
 241                 str_ident[ident].name[RESOURCE_LABEL_SIZE - 1] = 0;
 242         }
 243 }
 244
 245 static char *get_label(unsigned short ident)
 246 {
 247         if (!str_ident)
 248                 return "UNKNOWN";
 249
 250         return (*str_ident[ident].name ? str_ident[ident].name : "UNKNOWN");
 251 }
 252
 253 static int cmp_label(unsigned short ident, const char *label)
 254 {
 255         if (label == NULL) {
 256                 dump_stack();
 257                 printk(KERN_ERR "Please provide none-null label\n");
 258         }
 259
 260         if (label && str_ident)
 261                 return strncmp(str_ident[ident].name,
 262                                  label, strlen(label));
 263         else
 264                 return -EINVAL;
 265 }
 266
 267 #if defined(BF527_FAMILY) || defined(BF537_FAMILY)
 268 static void port_setup(unsigned gpio, unsigned short usage)
 269 {
 270         if (!check_gpio(gpio)) {
 271                 if (usage == GPIO_USAGE)
 272                         *port_fer[gpio_bank(gpio)] &= ~gpio_bit(gpio);
 273                 else
 274                         *port_fer[gpio_bank(gpio)] |= gpio_bit(gpio);
 275                 SSYNC();
 276         }
 277 }
 278 #elif defined(BF548_FAMILY)
 279 static void port_setup(unsigned gpio, unsigned short usage)
 280 {
 281         if (usage == GPIO_USAGE)
 282                 gpio_array[gpio_bank(gpio)]->port_fer &= ~gpio_bit(gpio);
 283         else
 284                 gpio_array[gpio_bank(gpio)]->port_fer |= gpio_bit(gpio);
 285         SSYNC();
 286 }
 287 #else
 288 # define port_setup(...)  do { } while (0)
 289 #endif
 290
 291 #ifdef BF537_FAMILY
 292 static struct {
 293         unsigned short res;
 294         unsigned short offset;
 295 } port_mux_lut[] = {
 296         {.res = P_PPI0_D13, .offset = 11},
 297         {.res = P_PPI0_D14, .offset = 11},
 298         {.res = P_PPI0_D15, .offset = 11},
 299         {.res = P_SPORT1_TFS, .offset = 11},
 300         {.res = P_SPORT1_TSCLK, .offset = 11},
 301         {.res = P_SPORT1_DTPRI, .offset = 11},
 302         {.res = P_PPI0_D10, .offset = 10},
 303         {.res = P_PPI0_D11, .offset = 10},
 304         {.res = P_PPI0_D12, .offset = 10},
 305         {.res = P_SPORT1_RSCLK, .offset = 10},
 306         {.res = P_SPORT1_RFS, .offset = 10},
 307         {.res = P_SPORT1_DRPRI, .offset = 10},
 308         {.res = P_PPI0_D8, .offset = 9},
 309         {.res = P_PPI0_D9, .offset = 9},
 310         {.res = P_SPORT1_DRSEC, .offset = 9},
 311         {.res = P_SPORT1_DTSEC, .offset = 9},
 312         {.res = P_TMR2, .offset = 8},
 313         {.res = P_PPI0_FS3, .offset = 8},
 314         {.res = P_TMR3, .offset = 7},
 315         {.res = P_SPI0_SSEL4, .offset = 7},
 316         {.res = P_TMR4, .offset = 6},
 317         {.res = P_SPI0_SSEL5, .offset = 6},
 318         {.res = P_TMR5, .offset = 5},
 319         {.res = P_SPI0_SSEL6, .offset = 5},
 320         {.res = P_UART1_RX, .offset = 4},
 321         {.res = P_UART1_TX, .offset = 4},
 322         {.res = P_TMR6, .offset = 4},
 323         {.res = P_TMR7, .offset = 4},
 324         {.res = P_UART0_RX, .offset = 3},
 325         {.res = P_UART0_TX, .offset = 3},
 326         {.res = P_DMAR0, .offset = 3},
 327         {.res = P_DMAR1, .offset = 3},
 328         {.res = P_SPORT0_DTSEC, .offset = 1},
 329         {.res = P_SPORT0_DRSEC, .offset = 1},
 330         {.res = P_CAN0_RX, .offset = 1},
 331         {.res = P_CAN0_TX, .offset = 1},
 332         {.res = P_SPI0_SSEL7, .offset = 1},
 333         {.res = P_SPORT0_TFS, .offset = 0},
 334         {.res = P_SPORT0_DTPRI, .offset = 0},
 335         {.res = P_SPI0_SSEL2, .offset = 0},
 336         {.res = P_SPI0_SSEL3, .offset = 0},
 337 };
 338
 339 static void portmux_setup(unsigned short per, unsigned short function)
 340 {
 341         u16 y, offset, muxreg;
 342
 343         for (y = 0; y < ARRAY_SIZE(port_mux_lut); y++) {
 344                 if (port_mux_lut[y].res == per) {
 345
 346                         /* SET PORTMUX REG */
 347
 348                         offset = port_mux_lut[y].offset;
 349                         muxreg = bfin_read_PORT_MUX();
 350
 351                         if (offset != 1) {
 352                                 muxreg &= ~(1 << offset);
 353                         } else {
 354                                 muxreg &= ~(3 << 1);
 355                         }
 356
 357                         muxreg |= (function << offset);
 358                         bfin_write_PORT_MUX(muxreg);
 359                 }
 360         }
 361 }
 362 #elif defined(BF548_FAMILY)
 363 inline void portmux_setup(unsigned short portno, unsigned short function)
 364 {
 365         u32 pmux;
 366
 367         pmux = gpio_array[gpio_bank(portno)]->port_mux;
 368
 369         pmux &= ~(0x3 << (2 * gpio_sub_n(portno)));
 370         pmux |= (function & 0x3) << (2 * gpio_sub_n(portno));
 371
 372         gpio_array[gpio_bank(portno)]->port_mux = pmux;
 373 }
 374
 375 inline u16 get_portmux(unsigned short portno)
 376 {
 377         u32 pmux;
 378
 379         pmux = gpio_array[gpio_bank(portno)]->port_mux;
 380
 381         return (pmux >> (2 * gpio_sub_n(portno)) & 0x3);
 382 }
 383 #elif defined(BF527_FAMILY)
 384 inline void portmux_setup(unsigned short portno, unsigned short function)
 385 {
 386         u16 pmux, ident = P_IDENT(portno);
 387         u8 offset = pmux_offset[gpio_bank(ident)][gpio_sub_n(ident)];
 388
 389         pmux = *port_mux[gpio_bank(ident)];
 390         pmux &= ~(3 << offset);
 391         pmux |= (function & 3) << offset;
 392         *port_mux[gpio_bank(ident)] = pmux;
 393         SSYNC();
 394 }
 395 #else
 396 # define portmux_setup(...)  do { } while (0)
 397 #endif
 398
 399 #ifndef BF548_FAMILY
 400 static void default_gpio(unsigned gpio)
 401 {
 402         unsigned short bank, bitmask;
 403         unsigned long flags;
 404
 405         bank = gpio_bank(gpio);
 406         bitmask = gpio_bit(gpio);
 407
 408         local_irq_save(flags);
 409
 410         gpio_bankb[bank]->maska_clear = bitmask;
 411         gpio_bankb[bank]->maskb_clear = bitmask;
 412         SSYNC();
 413         gpio_bankb[bank]->inen &= ~bitmask;
 414         gpio_bankb[bank]->dir &= ~bitmask;
 415         gpio_bankb[bank]->polar &= ~bitmask;
 416         gpio_bankb[bank]->both &= ~bitmask;
 417         gpio_bankb[bank]->edge &= ~bitmask;
 418         AWA_DUMMY_READ(edge);
 419         local_irq_restore(flags);
 420 }
 421 #else
 422 # define default_gpio(...)  do { } while (0)
 423 #endif
 424
 425 static int __init bfin_gpio_init(void)
 426 {
 427
 428         printk(KERN_INFO "Blackfin GPIO Controller\n");
 429
 430         return 0;
 431
 432 }
 433 arch_initcall(bfin_gpio_init);
 434
 435
 436 #ifndef BF548_FAMILY
 437 /***********************************************************
 438 *
 439 * FUNCTIONS: Blackfin General Purpose Ports Access Functions
 440 *
 441 * INPUTS/OUTPUTS:
 442 * gpio - GPIO Number between 0 and MAX_BLACKFIN_GPIOS
 443 *
 444 *
 445 * DESCRIPTION: These functions abstract direct register access
 446 *              to Blackfin processor General Purpose
 447 *              Ports Regsiters
 448 *
 449 * CAUTION: These functions do not belong to the GPIO Driver API
 450 *************************************************************
 451 * MODIFICATION HISTORY :
 452 **************************************************************/
 453
 454 /* Set a specific bit */
 455
 456 #define SET_GPIO(name) \
 457 void set_gpio_ ## name(unsigned gpio, unsigned short arg) \
 458 { \
 459         unsigned long flags; \
 460         local_irq_save(flags); \
 461         if (arg) \
 462                 gpio_bankb[gpio_bank(gpio)]->name |= gpio_bit(gpio); \
 463         else \
 464                 gpio_bankb[gpio_bank(gpio)]->name &= ~gpio_bit(gpio); \
 465         AWA_DUMMY_READ(name); \
 466         local_irq_restore(flags); \
 467 } \
 468 EXPORT_SYMBOL(set_gpio_ ## name);
 469
 470 SET_GPIO(dir)
 471 SET_GPIO(inen)
 472 SET_GPIO(polar)
 473 SET_GPIO(edge)
 474 SET_GPIO(both)
 475
 476
 477 #if ANOMALY_05000311 || ANOMALY_05000323
 478 #define SET_GPIO_SC(name) \
 479 void set_gpio_ ## name(unsigned gpio, unsigned short arg) \
 480 { \
 481         unsigned long flags; \
 482         local_irq_save(flags); \
 483         if (arg) \
 484                 gpio_bankb[gpio_bank(gpio)]->name ## _set = gpio_bit(gpio); \
 485         else \
 486                 gpio_bankb[gpio_bank(gpio)]->name ## _clear = gpio_bit(gpio); \
 487         AWA_DUMMY_READ(name); \
 488         local_irq_restore(flags); \
 489 } \
 490 EXPORT_SYMBOL(set_gpio_ ## name);
 491 #else
 492 #define SET_GPIO_SC(name) \
 493 void set_gpio_ ## name(unsigned gpio, unsigned short arg) \
 494 { \
 495         if (arg) \
 496                 gpio_bankb[gpio_bank(gpio)]->name ## _set = gpio_bit(gpio); \
 497         else \
 498                 gpio_bankb[gpio_bank(gpio)]->name ## _clear = gpio_bit(gpio); \
 499 } \
 500 EXPORT_SYMBOL(set_gpio_ ## name);
 501 #endif
 502
 503 SET_GPIO_SC(maska)
 504 SET_GPIO_SC(maskb)
 505 SET_GPIO_SC(data)
 506
 507 #if ANOMALY_05000311 || ANOMALY_05000323
 508 void set_gpio_toggle(unsigned gpio)
 509 {
 510         unsigned long flags;
 511         local_irq_save(flags);
 512         gpio_bankb[gpio_bank(gpio)]->toggle = gpio_bit(gpio);
 513         AWA_DUMMY_READ(toggle);
 514         local_irq_restore(flags);
 515 }
 516 #else
 517 void set_gpio_toggle(unsigned gpio)
 518 {
 519         gpio_bankb[gpio_bank(gpio)]->toggle = gpio_bit(gpio);
 520 }
 521 #endif
 522 EXPORT_SYMBOL(set_gpio_toggle);
 523
 524
 525 /*Set current PORT date (16-bit word)*/
 526
 527 #if ANOMALY_05000311 || ANOMALY_05000323
 528 #define SET_GPIO_P(name) \
 529 void set_gpiop_ ## name(unsigned gpio, unsigned short arg) \
 530 { \
 531         unsigned long flags; \
 532         local_irq_save(flags); \
 533         gpio_bankb[gpio_bank(gpio)]->name = arg; \
 534         AWA_DUMMY_READ(name); \
 535         local_irq_restore(flags); \
 536 } \
 537 EXPORT_SYMBOL(set_gpiop_ ## name);
 538 #else
 539 #define SET_GPIO_P(name) \
 540 void set_gpiop_ ## name(unsigned gpio, unsigned short arg) \
 541 { \
 542         gpio_bankb[gpio_bank(gpio)]->name = arg; \
 543 } \
 544 EXPORT_SYMBOL(set_gpiop_ ## name);
 545 #endif
 546
 547 SET_GPIO_P(data)
 548 SET_GPIO_P(dir)
 549 SET_GPIO_P(inen)
 550 SET_GPIO_P(polar)
 551 SET_GPIO_P(edge)
 552 SET_GPIO_P(both)
 553 SET_GPIO_P(maska)
 554 SET_GPIO_P(maskb)
 555
 556 /* Get a specific bit */
 557 #if ANOMALY_05000311 || ANOMALY_05000323
 558 #define GET_GPIO(name) \
 559 unsigned short get_gpio_ ## name(unsigned gpio) \
 560 { \
 561         unsigned long flags; \
 562         unsigned short ret; \
 563         local_irq_save(flags); \
 564         ret = 0x01 & (gpio_bankb[gpio_bank(gpio)]->name >> gpio_sub_n(gpio)); \
 565         AWA_DUMMY_READ(name); \
 566         local_irq_restore(flags); \
 567         return ret; \
 568 } \
 569 EXPORT_SYMBOL(get_gpio_ ## name);
 570 #else
 571 #define GET_GPIO(name) \
 572 unsigned short get_gpio_ ## name(unsigned gpio) \
 573 { \
 574         return (0x01 & (gpio_bankb[gpio_bank(gpio)]->name >> gpio_sub_n(gpio))); \
 575 } \
 576 EXPORT_SYMBOL(get_gpio_ ## name);
 577 #endif
 578
 579 GET_GPIO(data)
 580 GET_GPIO(dir)
 581 GET_GPIO(inen)
 582 GET_GPIO(polar)
 583 GET_GPIO(edge)
 584 GET_GPIO(both)
 585 GET_GPIO(maska)
 586 GET_GPIO(maskb)
 587
 588 /*Get current PORT date (16-bit word)*/
 589
 590 #if ANOMALY_05000311 || ANOMALY_05000323
 591 #define GET_GPIO_P(name) \
 592 unsigned short get_gpiop_ ## name(unsigned gpio) \
 593 { \
 594         unsigned long flags; \
 595         unsigned short ret; \
 596         local_irq_save(flags); \
 597         ret = (gpio_bankb[gpio_bank(gpio)]->name); \
 598         AWA_DUMMY_READ(name); \
 599         local_irq_restore(flags); \
 600         return ret; \
 601 } \
 602 EXPORT_SYMBOL(get_gpiop_ ## name);
 603 #else
 604 #define GET_GPIO_P(name) \
 605 unsigned short get_gpiop_ ## name(unsigned gpio) \
 606 { \
 607         return (gpio_bankb[gpio_bank(gpio)]->name);\
 608 } \
 609 EXPORT_SYMBOL(get_gpiop_ ## name);
 610 #endif
 611
 612 GET_GPIO_P(data)
 613 GET_GPIO_P(dir)
 614 GET_GPIO_P(inen)
 615 GET_GPIO_P(polar)
 616 GET_GPIO_P(edge)
 617 GET_GPIO_P(both)
 618 GET_GPIO_P(maska)
 619 GET_GPIO_P(maskb)
 620
 621
 622 #ifdef CONFIG_PM
 623 /***********************************************************
 624 *
 625 * FUNCTIONS: Blackfin PM Setup API
 626 *
 627 * INPUTS/OUTPUTS:
 628 * gpio - GPIO Number between 0 and MAX_BLACKFIN_GPIOS
 629 * type -
 630 *       PM_WAKE_RISING
 631 *       PM_WAKE_FALLING
 632 *       PM_WAKE_HIGH
 633 *       PM_WAKE_LOW
 634 *       PM_WAKE_BOTH_EDGES
 635 *
 636 * DESCRIPTION: Blackfin PM Driver API
 637 *
 638 * CAUTION:
 639 *************************************************************
 640 * MODIFICATION HISTORY :
 641 **************************************************************/
 642 int gpio_pm_wakeup_request(unsigned gpio, unsigned char type)
 643 {
 644         unsigned long flags;
 645
 646         if ((check_gpio(gpio) < 0) || !type)
 647                 return -EINVAL;
 648
 649         local_irq_save(flags);
 650         wakeup_map[gpio_bank(gpio)] |= gpio_bit(gpio);
 651         wakeup_flags_map[gpio] = type;
 652         local_irq_restore(flags);
 653
 654         return 0;
 655 }
 656 EXPORT_SYMBOL(gpio_pm_wakeup_request);
 657
 658 void gpio_pm_wakeup_free(unsigned gpio)
 659 {
 660         unsigned long flags;
 661
 662         if (check_gpio(gpio) < 0)
 663                 return;
 664
 665         local_irq_save(flags);
 666
 667         wakeup_map[gpio_bank(gpio)] &= ~gpio_bit(gpio);
 668
 669         local_irq_restore(flags);
 670 }
 671 EXPORT_SYMBOL(gpio_pm_wakeup_free);
 672
 673 static int bfin_gpio_wakeup_type(unsigned gpio, unsigned char type)
 674 {
 675         port_setup(gpio, GPIO_USAGE);
 676         set_gpio_dir(gpio, 0);
 677         set_gpio_inen(gpio, 1);
 678
 679         if (type & (PM_WAKE_RISING | PM_WAKE_FALLING))
 680                 set_gpio_edge(gpio, 1);
 681          else
 682                 set_gpio_edge(gpio, 0);
 683
 684         if ((type & (PM_WAKE_BOTH_EDGES)) == (PM_WAKE_BOTH_EDGES))
 685                 set_gpio_both(gpio, 1);
 686         else
 687                 set_gpio_both(gpio, 0);
 688
 689         if ((type & (PM_WAKE_FALLING | PM_WAKE_LOW)))
 690                 set_gpio_polar(gpio, 1);
 691         else
 692                 set_gpio_polar(gpio, 0);
 693
 694         SSYNC();
 695
 696         return 0;
 697 }
 698
 699 u32 bfin_pm_setup(void)
 700 {
 701         u16 bank, mask, i, gpio;
 702
 703         for (i = 0; i < MAX_BLACKFIN_GPIOS; i += GPIO_BANKSIZE) {
 704                 mask = wakeup_map[gpio_bank(i)];
 705                 bank = gpio_bank(i);
 706
 707                 gpio_bank_saved[bank].maskb = gpio_bankb[bank]->maskb;
 708                 gpio_bankb[bank]->maskb = 0;
 709
 710                 if (mask) {
 711 #ifdef BF537_FAMILY
 712                         gpio_bank_saved[bank].fer   = *port_fer[bank];
 713 #endif
 714                         gpio_bank_saved[bank].inen  = gpio_bankb[bank]->inen;
 715                         gpio_bank_saved[bank].polar = gpio_bankb[bank]->polar;
 716                         gpio_bank_saved[bank].dir   = gpio_bankb[bank]->dir;
 717                         gpio_bank_saved[bank].edge  = gpio_bankb[bank]->edge;
 718                         gpio_bank_saved[bank].both  = gpio_bankb[bank]->both;
 719                         gpio_bank_saved[bank].reserved =
 720                                                 reserved_gpio_map[bank];
 721
 722                         gpio = i;
 723
 724                         while (mask) {
 725                                 if ((mask & 1) && (wakeup_flags_map[gpio] !=
 726                                         PM_WAKE_IGNORE)) {
 727                                         reserved_gpio_map[gpio_bank(gpio)] |=
 728                                                         gpio_bit(gpio);
 729                                         bfin_gpio_wakeup_type(gpio,
 730                                                 wakeup_flags_map[gpio]);
 731                                         set_gpio_data(gpio, 0); /*Clear*/
 732                                 }
 733                                 gpio++;
 734                                 mask >>= 1;
 735                         }
 736
 737                         bfin_internal_set_wake(sic_iwr_irqs[bank], 1);
 738                         gpio_bankb[bank]->maskb_set = wakeup_map[gpio_bank(i)];
 739                 }
 740         }
 741
 742         AWA_DUMMY_READ(maskb_set);
 743
 744         return 0;
 745 }
 746
 747 void bfin_pm_restore(void)
 748 {
 749         u16 bank, mask, i;
 750
 751         for (i = 0; i < MAX_BLACKFIN_GPIOS; i += GPIO_BANKSIZE) {
 752                 mask = wakeup_map[gpio_bank(i)];
 753                 bank = gpio_bank(i);
 754
 755                 if (mask) {
 756 #ifdef BF537_FAMILY
 757                         *port_fer[bank]         = gpio_bank_saved[bank].fer;
 758 #endif
 759                         gpio_bankb[bank]->inen  = gpio_bank_saved[bank].inen;
 760                         gpio_bankb[bank]->dir   = gpio_bank_saved[bank].dir;
 761                         gpio_bankb[bank]->polar = gpio_bank_saved[bank].polar;
 762                         gpio_bankb[bank]->edge  = gpio_bank_saved[bank].edge;
 763                         gpio_bankb[bank]->both  = gpio_bank_saved[bank].both;
 764
 765                         reserved_gpio_map[bank] =
 766                                         gpio_bank_saved[bank].reserved;
 767                         bfin_internal_set_wake(sic_iwr_irqs[bank], 0);
 768                 }
 769
 770                 gpio_bankb[bank]->maskb = gpio_bank_saved[bank].maskb;
 771         }
 772         AWA_DUMMY_READ(maskb);
 773 }
 774
 775 #endif
 776 #else /* BF548_FAMILY */
 777
 778 unsigned short get_gpio_dir(unsigned gpio)
 779 {
 780         return (0x01 & (gpio_array[gpio_bank(gpio)]->port_dir_clear >> gpio_sub_n(gpio)));
 781 }
 782 EXPORT_SYMBOL(get_gpio_dir);
 783
 784 #endif /* BF548_FAMILY */
 785
 786 /***********************************************************
 787 *
 788 * FUNCTIONS:    Blackfin Peripheral Resource Allocation
 789 *               and PortMux Setup
 790 *
 791 * INPUTS/OUTPUTS:
 792 * per   Peripheral Identifier
 793 * label String
 794 *
 795 * DESCRIPTION: Blackfin Peripheral Resource Allocation and Setup API
 796 *
 797 * CAUTION:
 798 *************************************************************
 799 * MODIFICATION HISTORY :
 800 **************************************************************/
 801
 802 #ifdef BF548_FAMILY
 803 int peripheral_request(unsigned short per, const char *label)
 804 {
 805         unsigned long flags;
 806         unsigned short ident = P_IDENT(per);
 807
 808         /*
 809          * Don't cares are pins with only one dedicated function
 810          */
 811
 812         if (per & P_DONTCARE)
 813                 return 0;
 814
 815         if (!(per & P_DEFINED))
 816                 return -ENODEV;
 817
 818         if (check_gpio(ident) < 0)
 819                 return -EINVAL;
 820
 821         local_irq_save(flags);
 822
 823         if (unlikely(reserved_gpio_map[gpio_bank(ident)] & gpio_bit(ident))) {
 824                 printk(KERN_ERR
 825                     "%s: Peripheral %d is already reserved as GPIO by %s !\n",
 826                        __FUNCTION__, ident, get_label(ident));
 827                 dump_stack();
 828                 local_irq_restore(flags);
 829                 return -EBUSY;
 830         }
 831
 832         if (unlikely(reserved_peri_map[gpio_bank(ident)] & gpio_bit(ident))) {
 833
 834                 u16 funct = get_portmux(ident);
 835
 836         /*
 837          * Pin functions like AMC address strobes my
 838          * be requested and used by several drivers
 839          */
 840
 841                 if (!((per & P_MAYSHARE) && (funct == P_FUNCT2MUX(per)))) {
 842
 843                 /*
 844                  * Allow that the identical pin function can
 845                  * be requested from the same driver twice
 846                  */
 847
 848                 if (cmp_label(ident, label) == 0)
 849                         goto anyway;
 850
 851                         printk(KERN_ERR
 852                                "%s: Peripheral %d function %d is already reserved by %s !\n",
 853                                __FUNCTION__, ident, P_FUNCT2MUX(per), get_label(ident));
 854                         dump_stack();
 855                         local_irq_restore(flags);
 856                         return -EBUSY;
 857                 }
 858         }
 859
 860 anyway:
 861         reserved_peri_map[gpio_bank(ident)] |= gpio_bit(ident);
 862
 863         portmux_setup(ident, P_FUNCT2MUX(per));
 864         port_setup(ident, PERIPHERAL_USAGE);
 865
 866         local_irq_restore(flags);
 867         set_label(ident, label);
 868
 869         return 0;
 870 }
 871 EXPORT_SYMBOL(peripheral_request);
 872 #else
 873
 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         local_irq_save(flags);
 890
 891         if (!check_gpio(ident)) {
 892
 893         if (unlikely(reserved_gpio_map[gpio_bank(ident)] & gpio_bit(ident))) {
 894                 printk(KERN_ERR
 895                        "%s: Peripheral %d is already reserved as GPIO by %s !\n",
 896                        __FUNCTION__, ident, get_label(ident));
 897                 dump_stack();
 898                 local_irq_restore(flags);
 899                 return -EBUSY;
 900         }
 901
 902         }
 903
 904         if (unlikely(reserved_peri_map[gpio_bank(ident)] & gpio_bit(ident))) {
 905
 906         /*
 907          * Pin functions like AMC address strobes my
 908          * be requested and used by several drivers
 909          */
 910
 911         if (!(per & P_MAYSHARE)) {
 912
 913         /*
 914          * Allow that the identical pin function can
 915          * be requested from the same driver twice
 916          */
 917
 918                 if (cmp_label(ident, label) == 0)
 919                         goto anyway;
 920
 921                         printk(KERN_ERR
 922                                "%s: Peripheral %d function %d is already"
 923                                " reserved by %s !\n",
 924                                __FUNCTION__, ident, P_FUNCT2MUX(per),
 925                                 get_label(ident));
 926                         dump_stack();
 927                         local_irq_restore(flags);
 928                         return -EBUSY;
 929                 }
 930
 931         }
 932
 933 anyway:
 934         portmux_setup(per, P_FUNCT2MUX(per));
 935
 936         port_setup(ident, PERIPHERAL_USAGE);
 937
 938         reserved_peri_map[gpio_bank(ident)] |= gpio_bit(ident);
 939         local_irq_restore(flags);
 940         set_label(ident, label);
 941
 942         return 0;
 943 }
 944 EXPORT_SYMBOL(peripheral_request);
 945 #endif
 946
 947 int peripheral_request_list(unsigned short per[], const char *label)
 948 {
 949         u16 cnt;
 950         int ret;
 951
 952         for (cnt = 0; per[cnt] != 0; cnt++) {
 953
 954                 ret = peripheral_request(per[cnt], label);
 955
 956                 if (ret < 0) {
 957                         for ( ; cnt > 0; cnt--) {
 958                                 peripheral_free(per[cnt - 1]);
 959                         }
 960                 return ret;
 961                 }
 962         }
 963
 964         return 0;
 965 }
 966 EXPORT_SYMBOL(peripheral_request_list);
 967
 968 void peripheral_free(unsigned short per)
 969 {
 970         unsigned long flags;
 971         unsigned short ident = P_IDENT(per);
 972
 973         if (per & P_DONTCARE)
 974                 return;
 975
 976         if (!(per & P_DEFINED))
 977                 return;
 978
 979         if (check_gpio(ident) < 0)
 980                 return;
 981
 982         local_irq_save(flags);
 983
 984         if (unlikely(!(reserved_peri_map[gpio_bank(ident)]
 985                          & gpio_bit(ident)))) {
 986                 local_irq_restore(flags);
 987                 return;
 988         }
 989
 990         if (!(per & P_MAYSHARE)) {
 991                 port_setup(ident, GPIO_USAGE);
 992         }
 993
 994         reserved_peri_map[gpio_bank(ident)] &= ~gpio_bit(ident);
 995
 996         set_label(ident, "free");
 997
 998         local_irq_restore(flags);
 999 }
1000 EXPORT_SYMBOL(peripheral_free);
1001
1002 void peripheral_free_list(unsigned short per[])
1003 {
1004         u16 cnt;
1005
1006         for (cnt = 0; per[cnt] != 0; cnt++) {
1007                 peripheral_free(per[cnt]);
1008         }
1009
1010 }
1011 EXPORT_SYMBOL(peripheral_free_list);
1012
1013 /***********************************************************
1014 *
1015 * FUNCTIONS: Blackfin GPIO Driver
1016 *
1017 * INPUTS/OUTPUTS:
1018 * gpio  PIO Number between 0 and MAX_BLACKFIN_GPIOS
1019 * label String
1020 *
1021 * DESCRIPTION: Blackfin GPIO Driver API
1022 *
1023 * CAUTION:
1024 *************************************************************
1025 * MODIFICATION HISTORY :
1026 **************************************************************/
1027
1028 int gpio_request(unsigned gpio, const char *label)
1029 {
1030         unsigned long flags;
1031
1032         if (check_gpio(gpio) < 0)
1033                 return -EINVAL;
1034
1035         local_irq_save(flags);
1036
1037         /*
1038          * Allow that the identical GPIO can
1039          * be requested from the same driver twice
1040          * Do nothing and return -
1041          */
1042
1043         if (cmp_label(gpio, label) == 0) {
1044                 local_irq_restore(flags);
1045                 return 0;
1046         }
1047
1048         if (unlikely(reserved_gpio_map[gpio_bank(gpio)] & gpio_bit(gpio))) {
1049                 printk(KERN_ERR "bfin-gpio: GPIO %d is already reserved by %s !\n",
1050                          gpio, get_label(gpio));
1051                 dump_stack();
1052                 local_irq_restore(flags);
1053                 return -EBUSY;
1054         }
1055         if (unlikely(reserved_peri_map[gpio_bank(gpio)] & gpio_bit(gpio))) {
1056                 printk(KERN_ERR
1057                        "bfin-gpio: GPIO %d is already reserved as Peripheral by %s !\n",
1058                        gpio, get_label(gpio));
1059                 dump_stack();
1060                 local_irq_restore(flags);
1061                 return -EBUSY;
1062         }
1063
1064         reserved_gpio_map[gpio_bank(gpio)] |= gpio_bit(gpio);
1065
1066         local_irq_restore(flags);
1067
1068         port_setup(gpio, GPIO_USAGE);
1069         set_label(gpio, label);
1070
1071         return 0;
1072 }
1073 EXPORT_SYMBOL(gpio_request);
1074
1075 void gpio_free(unsigned gpio)
1076 {
1077         unsigned long flags;
1078
1079         if (check_gpio(gpio) < 0)
1080                 return;
1081
1082         local_irq_save(flags);
1083
1084         if (unlikely(!(reserved_gpio_map[gpio_bank(gpio)] & gpio_bit(gpio)))) {
1085                 gpio_error(gpio);
1086                 dump_stack();
1087                 local_irq_restore(flags);
1088                 return;
1089         }
1090
1091         default_gpio(gpio);
1092
1093         reserved_gpio_map[gpio_bank(gpio)] &= ~gpio_bit(gpio);
1094
1095         set_label(gpio, "free");
1096
1097         local_irq_restore(flags);
1098 }
1099 EXPORT_SYMBOL(gpio_free);
1100
1101
1102 #ifdef BF548_FAMILY
1103 int gpio_direction_input(unsigned gpio)
1104 {
1105         unsigned long flags;
1106
1107         if (!(reserved_gpio_map[gpio_bank(gpio)] & gpio_bit(gpio))) {
1108                 gpio_error(gpio);
1109                 return -EINVAL;
1110         }
1111
1112         local_irq_save(flags);
1113         gpio_array[gpio_bank(gpio)]->port_dir_clear = gpio_bit(gpio);
1114         gpio_array[gpio_bank(gpio)]->port_inen |= gpio_bit(gpio);
1115         local_irq_restore(flags);
1116
1117         return 0;
1118 }
1119 EXPORT_SYMBOL(gpio_direction_input);
1120
1121 int gpio_direction_output(unsigned gpio, int value)
1122 {
1123         unsigned long flags;
1124
1125         if (!(reserved_gpio_map[gpio_bank(gpio)] & gpio_bit(gpio))) {
1126                 gpio_error(gpio);
1127                 return -EINVAL;
1128         }
1129
1130         local_irq_save(flags);
1131         gpio_array[gpio_bank(gpio)]->port_inen &= ~gpio_bit(gpio);
1132         gpio_set_value(gpio, value);
1133         gpio_array[gpio_bank(gpio)]->port_dir_set = gpio_bit(gpio);
1134         local_irq_restore(flags);
1135
1136         return 0;
1137 }
1138 EXPORT_SYMBOL(gpio_direction_output);
1139
1140 void gpio_set_value(unsigned gpio, int arg)
1141 {
1142         if (arg)
1143                 gpio_array[gpio_bank(gpio)]->port_set = gpio_bit(gpio);
1144         else
1145                 gpio_array[gpio_bank(gpio)]->port_clear = gpio_bit(gpio);
1146 }
1147 EXPORT_SYMBOL(gpio_set_value);
1148
1149 int gpio_get_value(unsigned gpio)
1150 {
1151         return (1 & (gpio_array[gpio_bank(gpio)]->port_data >> gpio_sub_n(gpio)));
1152 }
1153 EXPORT_SYMBOL(gpio_get_value);
1154
1155 #else
1156
1157 int gpio_direction_input(unsigned gpio)
1158 {
1159         unsigned long flags;
1160
1161         if (!(reserved_gpio_map[gpio_bank(gpio)] & gpio_bit(gpio))) {
1162                 gpio_error(gpio);
1163                 return -EINVAL;
1164         }
1165
1166         local_irq_save(flags);
1167         gpio_bankb[gpio_bank(gpio)]->dir &= ~gpio_bit(gpio);
1168         gpio_bankb[gpio_bank(gpio)]->inen |= gpio_bit(gpio);
1169         AWA_DUMMY_READ(inen);
1170         local_irq_restore(flags);
1171
1172         return 0;
1173 }
1174 EXPORT_SYMBOL(gpio_direction_input);
1175
1176 int gpio_direction_output(unsigned gpio, int value)
1177 {
1178         unsigned long flags;
1179
1180         if (!(reserved_gpio_map[gpio_bank(gpio)] & gpio_bit(gpio))) {
1181                 gpio_error(gpio);
1182                 return -EINVAL;
1183         }
1184
1185         local_irq_save(flags);
1186         gpio_bankb[gpio_bank(gpio)]->inen &= ~gpio_bit(gpio);
1187
1188         if (value)
1189                 gpio_bankb[gpio_bank(gpio)]->data_set = gpio_bit(gpio);
1190         else
1191                 gpio_bankb[gpio_bank(gpio)]->data_clear = gpio_bit(gpio);
1192
1193         gpio_bankb[gpio_bank(gpio)]->dir |= gpio_bit(gpio);
1194         AWA_DUMMY_READ(dir);
1195         local_irq_restore(flags);
1196
1197         return 0;
1198 }
1199 EXPORT_SYMBOL(gpio_direction_output);
1200
1201 /* If we are booting from SPI and our board lacks a strong enough pull up,
1202  * the core can reset and execute the bootrom faster than the resistor can
1203  * pull the signal logically high.  To work around this (common) error in
1204  * board design, we explicitly set the pin back to GPIO mode, force /CS
1205  * high, and wait for the electrons to do their thing.
1206  *
1207  * This function only makes sense to be called from reset code, but it
1208  * lives here as we need to force all the GPIO states w/out going through
1209  * BUG() checks and such.
1210  */
1211 void bfin_gpio_reset_spi0_ssel1(void)
1212 {
1213         u16 gpio = P_IDENT(P_SPI0_SSEL1);
1214
1215         port_setup(gpio, GPIO_USAGE);
1216         gpio_bankb[gpio_bank(gpio)]->data_set = gpio_bit(gpio);
1217         AWA_DUMMY_READ(data_set);
1218         udelay(1);
1219 }
1220
1221 #endif /*BF548_FAMILY */
1222
1223 #if defined(CONFIG_PROC_FS)
1224 static int gpio_proc_read(char *buf, char **start, off_t offset,
1225                           int len, int *unused_i, void *unused_v)
1226 {
1227         int c, outlen = 0;
1228
1229         for (c = 0; c < MAX_RESOURCES; c++) {
1230                 if (!check_gpio(c) && (reserved_gpio_map[gpio_bank(c)] & gpio_bit(c)))
1231                         len = sprintf(buf, "GPIO_%d: %s \t\tGPIO %s\n", c,
1232                                  get_label(c), get_gpio_dir(c) ? "OUTPUT" : "INPUT");
1233                 else if (reserved_peri_map[gpio_bank(c)] & gpio_bit(c))
1234                         len = sprintf(buf, "GPIO_%d: %s \t\tPeripheral\n", c, get_label(c));
1235                 else
1236                         continue;
1237                 buf += len;
1238                 outlen += len;
1239         }
1240         return outlen;
1241 }
1242
1243 static __init int gpio_register_proc(void)
1244 {
1245         struct proc_dir_entry *proc_gpio;
1246
1247         proc_gpio = create_proc_entry("gpio", S_IRUGO, NULL);
1248         if (proc_gpio)
1249                 proc_gpio->read_proc = gpio_proc_read;
1250         return proc_gpio != NULL;
1251 }
1252 __initcall(gpio_register_proc);
1253 #endif