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                         muxreg |= (function << offset);
 357                         bfin_write_PORT_MUX(muxreg);
 358                 }
 359         }
 360 }
 361 #elif defined(BF548_FAMILY)
 362 inline void portmux_setup(unsigned short portno, unsigned short function)
 363 {
 364         u32 pmux;
 365
 366         pmux = gpio_array[gpio_bank(portno)]->port_mux;
 367
 368         pmux &= ~(0x3 << (2 * gpio_sub_n(portno)));
 369         pmux |= (function & 0x3) << (2 * gpio_sub_n(portno));
 370
 371         gpio_array[gpio_bank(portno)]->port_mux = pmux;
 372 }
 373
 374 inline u16 get_portmux(unsigned short portno)
 375 {
 376         u32 pmux;
 377
 378         pmux = gpio_array[gpio_bank(portno)]->port_mux;
 379
 380         return (pmux >> (2 * gpio_sub_n(portno)) & 0x3);
 381 }
 382 #elif defined(BF527_FAMILY)
 383 inline void portmux_setup(unsigned short portno, unsigned short function)
 384 {
 385         u16 pmux, ident = P_IDENT(portno);
 386         u8 offset = pmux_offset[gpio_bank(ident)][gpio_sub_n(ident)];
 387
 388         pmux = *port_mux[gpio_bank(ident)];
 389         pmux &= ~(3 << offset);
 390         pmux |= (function & 3) << offset;
 391         *port_mux[gpio_bank(ident)] = pmux;
 392         SSYNC();
 393 }
 394 #else
 395 # define portmux_setup(...)  do { } while (0)
 396 #endif
 397
 398 #ifndef BF548_FAMILY
 399 static void default_gpio(unsigned gpio)
 400 {
 401         unsigned short bank, bitmask;
 402         unsigned long flags;
 403
 404         bank = gpio_bank(gpio);
 405         bitmask = gpio_bit(gpio);
 406
 407         local_irq_save(flags);
 408
 409         gpio_bankb[bank]->maska_clear = bitmask;
 410         gpio_bankb[bank]->maskb_clear = bitmask;
 411         SSYNC();
 412         gpio_bankb[bank]->inen &= ~bitmask;
 413         gpio_bankb[bank]->dir &= ~bitmask;
 414         gpio_bankb[bank]->polar &= ~bitmask;
 415         gpio_bankb[bank]->both &= ~bitmask;
 416         gpio_bankb[bank]->edge &= ~bitmask;
 417         AWA_DUMMY_READ(edge);
 418         local_irq_restore(flags);
 419 }
 420 #else
 421 # define default_gpio(...)  do { } while (0)
 422 #endif
 423
 424 static int __init bfin_gpio_init(void)
 425 {
 426         printk(KERN_INFO "Blackfin GPIO Controller\n");
 427
 428         return 0;
 429 }
 430 arch_initcall(bfin_gpio_init);
 431
 432
 433 #ifndef BF548_FAMILY
 434 /***********************************************************
 435 *
 436 * FUNCTIONS: Blackfin General Purpose Ports Access Functions
 437 *
 438 * INPUTS/OUTPUTS:
 439 * gpio - GPIO Number between 0 and MAX_BLACKFIN_GPIOS
 440 *
 441 *
 442 * DESCRIPTION: These functions abstract direct register access
 443 *              to Blackfin processor General Purpose
 444 *              Ports Regsiters
 445 *
 446 * CAUTION: These functions do not belong to the GPIO Driver API
 447 *************************************************************
 448 * MODIFICATION HISTORY :
 449 **************************************************************/
 450
 451 /* Set a specific bit */
 452
 453 #define SET_GPIO(name) \
 454 void set_gpio_ ## name(unsigned gpio, unsigned short arg) \
 455 { \
 456         unsigned long flags; \
 457         local_irq_save(flags); \
 458         if (arg) \
 459                 gpio_bankb[gpio_bank(gpio)]->name |= gpio_bit(gpio); \
 460         else \
 461                 gpio_bankb[gpio_bank(gpio)]->name &= ~gpio_bit(gpio); \
 462         AWA_DUMMY_READ(name); \
 463         local_irq_restore(flags); \
 464 } \
 465 EXPORT_SYMBOL(set_gpio_ ## name);
 466
 467 SET_GPIO(dir)
 468 SET_GPIO(inen)
 469 SET_GPIO(polar)
 470 SET_GPIO(edge)
 471 SET_GPIO(both)
 472
 473
 474 #if ANOMALY_05000311 || ANOMALY_05000323
 475 #define SET_GPIO_SC(name) \
 476 void set_gpio_ ## name(unsigned gpio, unsigned short arg) \
 477 { \
 478         unsigned long flags; \
 479         local_irq_save(flags); \
 480         if (arg) \
 481                 gpio_bankb[gpio_bank(gpio)]->name ## _set = gpio_bit(gpio); \
 482         else \
 483                 gpio_bankb[gpio_bank(gpio)]->name ## _clear = gpio_bit(gpio); \
 484         AWA_DUMMY_READ(name); \
 485         local_irq_restore(flags); \
 486 } \
 487 EXPORT_SYMBOL(set_gpio_ ## name);
 488 #else
 489 #define SET_GPIO_SC(name) \
 490 void set_gpio_ ## name(unsigned gpio, unsigned short arg) \
 491 { \
 492         if (arg) \
 493                 gpio_bankb[gpio_bank(gpio)]->name ## _set = gpio_bit(gpio); \
 494         else \
 495                 gpio_bankb[gpio_bank(gpio)]->name ## _clear = gpio_bit(gpio); \
 496 } \
 497 EXPORT_SYMBOL(set_gpio_ ## name);
 498 #endif
 499
 500 SET_GPIO_SC(maska)
 501 SET_GPIO_SC(maskb)
 502 SET_GPIO_SC(data)
 503
 504 #if ANOMALY_05000311 || ANOMALY_05000323
 505 void set_gpio_toggle(unsigned gpio)
 506 {
 507         unsigned long flags;
 508         local_irq_save(flags);
 509         gpio_bankb[gpio_bank(gpio)]->toggle = gpio_bit(gpio);
 510         AWA_DUMMY_READ(toggle);
 511         local_irq_restore(flags);
 512 }
 513 #else
 514 void set_gpio_toggle(unsigned gpio)
 515 {
 516         gpio_bankb[gpio_bank(gpio)]->toggle = gpio_bit(gpio);
 517 }
 518 #endif
 519 EXPORT_SYMBOL(set_gpio_toggle);
 520
 521
 522 /*Set current PORT date (16-bit word)*/
 523
 524 #if ANOMALY_05000311 || ANOMALY_05000323
 525 #define SET_GPIO_P(name) \
 526 void set_gpiop_ ## name(unsigned gpio, unsigned short arg) \
 527 { \
 528         unsigned long flags; \
 529         local_irq_save(flags); \
 530         gpio_bankb[gpio_bank(gpio)]->name = arg; \
 531         AWA_DUMMY_READ(name); \
 532         local_irq_restore(flags); \
 533 } \
 534 EXPORT_SYMBOL(set_gpiop_ ## name);
 535 #else
 536 #define SET_GPIO_P(name) \
 537 void set_gpiop_ ## name(unsigned gpio, unsigned short arg) \
 538 { \
 539         gpio_bankb[gpio_bank(gpio)]->name = arg; \
 540 } \
 541 EXPORT_SYMBOL(set_gpiop_ ## name);
 542 #endif
 543
 544 SET_GPIO_P(data)
 545 SET_GPIO_P(dir)
 546 SET_GPIO_P(inen)
 547 SET_GPIO_P(polar)
 548 SET_GPIO_P(edge)
 549 SET_GPIO_P(both)
 550 SET_GPIO_P(maska)
 551 SET_GPIO_P(maskb)
 552
 553 /* Get a specific bit */
 554 #if ANOMALY_05000311 || ANOMALY_05000323
 555 #define GET_GPIO(name) \
 556 unsigned short get_gpio_ ## name(unsigned gpio) \
 557 { \
 558         unsigned long flags; \
 559         unsigned short ret; \
 560         local_irq_save(flags); \
 561         ret = 0x01 & (gpio_bankb[gpio_bank(gpio)]->name >> gpio_sub_n(gpio)); \
 562         AWA_DUMMY_READ(name); \
 563         local_irq_restore(flags); \
 564         return ret; \
 565 } \
 566 EXPORT_SYMBOL(get_gpio_ ## name);
 567 #else
 568 #define GET_GPIO(name) \
 569 unsigned short get_gpio_ ## name(unsigned gpio) \
 570 { \
 571         return (0x01 & (gpio_bankb[gpio_bank(gpio)]->name >> gpio_sub_n(gpio))); \
 572 } \
 573 EXPORT_SYMBOL(get_gpio_ ## name);
 574 #endif
 575
 576 GET_GPIO(data)
 577 GET_GPIO(dir)
 578 GET_GPIO(inen)
 579 GET_GPIO(polar)
 580 GET_GPIO(edge)
 581 GET_GPIO(both)
 582 GET_GPIO(maska)
 583 GET_GPIO(maskb)
 584
 585 /*Get current PORT date (16-bit word)*/
 586
 587 #if ANOMALY_05000311 || ANOMALY_05000323
 588 #define GET_GPIO_P(name) \
 589 unsigned short get_gpiop_ ## name(unsigned gpio) \
 590 { \
 591         unsigned long flags; \
 592         unsigned short ret; \
 593         local_irq_save(flags); \
 594         ret = (gpio_bankb[gpio_bank(gpio)]->name); \
 595         AWA_DUMMY_READ(name); \
 596         local_irq_restore(flags); \
 597         return ret; \
 598 } \
 599 EXPORT_SYMBOL(get_gpiop_ ## name);
 600 #else
 601 #define GET_GPIO_P(name) \
 602 unsigned short get_gpiop_ ## name(unsigned gpio) \
 603 { \
 604         return (gpio_bankb[gpio_bank(gpio)]->name);\
 605 } \
 606 EXPORT_SYMBOL(get_gpiop_ ## name);
 607 #endif
 608
 609 GET_GPIO_P(data)
 610 GET_GPIO_P(dir)
 611 GET_GPIO_P(inen)
 612 GET_GPIO_P(polar)
 613 GET_GPIO_P(edge)
 614 GET_GPIO_P(both)
 615 GET_GPIO_P(maska)
 616 GET_GPIO_P(maskb)
 617
 618
 619 #ifdef CONFIG_PM
 620 /***********************************************************
 621 *
 622 * FUNCTIONS: Blackfin PM Setup API
 623 *
 624 * INPUTS/OUTPUTS:
 625 * gpio - GPIO Number between 0 and MAX_BLACKFIN_GPIOS
 626 * type -
 627 *       PM_WAKE_RISING
 628 *       PM_WAKE_FALLING
 629 *       PM_WAKE_HIGH
 630 *       PM_WAKE_LOW
 631 *       PM_WAKE_BOTH_EDGES
 632 *
 633 * DESCRIPTION: Blackfin PM Driver API
 634 *
 635 * CAUTION:
 636 *************************************************************
 637 * MODIFICATION HISTORY :
 638 **************************************************************/
 639 int gpio_pm_wakeup_request(unsigned gpio, unsigned char type)
 640 {
 641         unsigned long flags;
 642
 643         if ((check_gpio(gpio) < 0) || !type)
 644                 return -EINVAL;
 645
 646         local_irq_save(flags);
 647         wakeup_map[gpio_bank(gpio)] |= gpio_bit(gpio);
 648         wakeup_flags_map[gpio] = type;
 649         local_irq_restore(flags);
 650
 651         return 0;
 652 }
 653 EXPORT_SYMBOL(gpio_pm_wakeup_request);
 654
 655 void gpio_pm_wakeup_free(unsigned gpio)
 656 {
 657         unsigned long flags;
 658
 659         if (check_gpio(gpio) < 0)
 660                 return;
 661
 662         local_irq_save(flags);
 663
 664         wakeup_map[gpio_bank(gpio)] &= ~gpio_bit(gpio);
 665
 666         local_irq_restore(flags);
 667 }
 668 EXPORT_SYMBOL(gpio_pm_wakeup_free);
 669
 670 static int bfin_gpio_wakeup_type(unsigned gpio, unsigned char type)
 671 {
 672         port_setup(gpio, GPIO_USAGE);
 673         set_gpio_dir(gpio, 0);
 674         set_gpio_inen(gpio, 1);
 675
 676         if (type & (PM_WAKE_RISING | PM_WAKE_FALLING))
 677                 set_gpio_edge(gpio, 1);
 678          else
 679                 set_gpio_edge(gpio, 0);
 680
 681         if ((type & (PM_WAKE_BOTH_EDGES)) == (PM_WAKE_BOTH_EDGES))
 682                 set_gpio_both(gpio, 1);
 683         else
 684                 set_gpio_both(gpio, 0);
 685
 686         if ((type & (PM_WAKE_FALLING | PM_WAKE_LOW)))
 687                 set_gpio_polar(gpio, 1);
 688         else
 689                 set_gpio_polar(gpio, 0);
 690
 691         SSYNC();
 692
 693         return 0;
 694 }
 695
 696 u32 bfin_pm_setup(void)
 697 {
 698         u16 bank, mask, i, gpio;
 699
 700         for (i = 0; i < MAX_BLACKFIN_GPIOS; i += GPIO_BANKSIZE) {
 701                 mask = wakeup_map[gpio_bank(i)];
 702                 bank = gpio_bank(i);
 703
 704                 gpio_bank_saved[bank].maskb = gpio_bankb[bank]->maskb;
 705                 gpio_bankb[bank]->maskb = 0;
 706
 707                 if (mask) {
 708 #ifdef BF537_FAMILY
 709                         gpio_bank_saved[bank].fer   = *port_fer[bank];
 710 #endif
 711                         gpio_bank_saved[bank].inen  = gpio_bankb[bank]->inen;
 712                         gpio_bank_saved[bank].polar = gpio_bankb[bank]->polar;
 713                         gpio_bank_saved[bank].dir   = gpio_bankb[bank]->dir;
 714                         gpio_bank_saved[bank].edge  = gpio_bankb[bank]->edge;
 715                         gpio_bank_saved[bank].both  = gpio_bankb[bank]->both;
 716                         gpio_bank_saved[bank].reserved =
 717                                                 reserved_gpio_map[bank];
 718
 719                         gpio = i;
 720
 721                         while (mask) {
 722                                 if ((mask & 1) && (wakeup_flags_map[gpio] !=
 723                                         PM_WAKE_IGNORE)) {
 724                                         reserved_gpio_map[gpio_bank(gpio)] |=
 725                                                         gpio_bit(gpio);
 726                                         bfin_gpio_wakeup_type(gpio,
 727                                                 wakeup_flags_map[gpio]);
 728                                         set_gpio_data(gpio, 0); /*Clear*/
 729                                 }
 730                                 gpio++;
 731                                 mask >>= 1;
 732                         }
 733
 734                         bfin_internal_set_wake(sic_iwr_irqs[bank], 1);
 735                         gpio_bankb[bank]->maskb_set = wakeup_map[gpio_bank(i)];
 736                 }
 737         }
 738
 739         AWA_DUMMY_READ(maskb_set);
 740
 741         return 0;
 742 }
 743
 744 void bfin_pm_restore(void)
 745 {
 746         u16 bank, mask, i;
 747
 748         for (i = 0; i < MAX_BLACKFIN_GPIOS; i += GPIO_BANKSIZE) {
 749                 mask = wakeup_map[gpio_bank(i)];
 750                 bank = gpio_bank(i);
 751
 752                 if (mask) {
 753 #ifdef BF537_FAMILY
 754                         *port_fer[bank]         = gpio_bank_saved[bank].fer;
 755 #endif
 756                         gpio_bankb[bank]->inen  = gpio_bank_saved[bank].inen;
 757                         gpio_bankb[bank]->dir   = gpio_bank_saved[bank].dir;
 758                         gpio_bankb[bank]->polar = gpio_bank_saved[bank].polar;
 759                         gpio_bankb[bank]->edge  = gpio_bank_saved[bank].edge;
 760                         gpio_bankb[bank]->both  = gpio_bank_saved[bank].both;
 761
 762                         reserved_gpio_map[bank] =
 763                                         gpio_bank_saved[bank].reserved;
 764                         bfin_internal_set_wake(sic_iwr_irqs[bank], 0);
 765                 }
 766
 767                 gpio_bankb[bank]->maskb = gpio_bank_saved[bank].maskb;
 768         }
 769         AWA_DUMMY_READ(maskb);
 770 }
 771
 772 #endif
 773 #else /* BF548_FAMILY */
 774
 775 unsigned short get_gpio_dir(unsigned gpio)
 776 {
 777         return (0x01 & (gpio_array[gpio_bank(gpio)]->port_dir_clear >> gpio_sub_n(gpio)));
 778 }
 779 EXPORT_SYMBOL(get_gpio_dir);
 780
 781 #endif /* BF548_FAMILY */
 782
 783 /***********************************************************
 784 *
 785 * FUNCTIONS:    Blackfin Peripheral Resource Allocation
 786 *               and PortMux Setup
 787 *
 788 * INPUTS/OUTPUTS:
 789 * per   Peripheral Identifier
 790 * label String
 791 *
 792 * DESCRIPTION: Blackfin Peripheral Resource Allocation and Setup API
 793 *
 794 * CAUTION:
 795 *************************************************************
 796 * MODIFICATION HISTORY :
 797 **************************************************************/
 798
 799 #ifdef BF548_FAMILY
 800 int peripheral_request(unsigned short per, const char *label)
 801 {
 802         unsigned long flags;
 803         unsigned short ident = P_IDENT(per);
 804
 805         /*
 806          * Don't cares are pins with only one dedicated function
 807          */
 808
 809         if (per & P_DONTCARE)
 810                 return 0;
 811
 812         if (!(per & P_DEFINED))
 813                 return -ENODEV;
 814
 815         if (check_gpio(ident) < 0)
 816                 return -EINVAL;
 817
 818         local_irq_save(flags);
 819
 820         if (unlikely(reserved_gpio_map[gpio_bank(ident)] & gpio_bit(ident))) {
 821                 dump_stack();
 822                 printk(KERN_ERR
 823                     "%s: Peripheral %d is already reserved as GPIO by %s !\n",
 824                        __func__, ident, get_label(ident));
 825                 local_irq_restore(flags);
 826                 return -EBUSY;
 827         }
 828
 829         if (unlikely(reserved_peri_map[gpio_bank(ident)] & gpio_bit(ident))) {
 830
 831                 u16 funct = get_portmux(ident);
 832
 833                 /*
 834                  * Pin functions like AMC address strobes my
 835                  * be requested and used by several drivers
 836                  */
 837
 838                 if (!((per & P_MAYSHARE) && (funct == P_FUNCT2MUX(per)))) {
 839
 840                         /*
 841                          * Allow that the identical pin function can
 842                          * be requested from the same driver twice
 843                          */
 844
 845                         if (cmp_label(ident, label) == 0)
 846                                 goto anyway;
 847
 848                         dump_stack();
 849                         printk(KERN_ERR
 850                                "%s: Peripheral %d function %d is already reserved by %s !\n",
 851                                __func__, ident, P_FUNCT2MUX(per), get_label(ident));
 852                         local_irq_restore(flags);
 853                         return -EBUSY;
 854                 }
 855         }
 856
 857  anyway:
 858         reserved_peri_map[gpio_bank(ident)] |= gpio_bit(ident);
 859
 860         portmux_setup(ident, P_FUNCT2MUX(per));
 861         port_setup(ident, PERIPHERAL_USAGE);
 862
 863         local_irq_restore(flags);
 864         set_label(ident, label);
 865
 866         return 0;
 867 }
 868 EXPORT_SYMBOL(peripheral_request);
 869 #else
 870
 871 int peripheral_request(unsigned short per, const char *label)
 872 {
 873         unsigned long flags;
 874         unsigned short ident = P_IDENT(per);
 875
 876         /*
 877          * Don't cares are pins with only one dedicated function
 878          */
 879
 880         if (per & P_DONTCARE)
 881                 return 0;
 882
 883         if (!(per & P_DEFINED))
 884                 return -ENODEV;
 885
 886         local_irq_save(flags);
 887
 888         if (!check_gpio(ident)) {
 889
 890                 if (unlikely(reserved_gpio_map[gpio_bank(ident)] & gpio_bit(ident))) {
 891                         dump_stack();
 892                         printk(KERN_ERR
 893                                "%s: Peripheral %d is already reserved as GPIO by %s !\n",
 894                                __func__, ident, get_label(ident));
 895                         local_irq_restore(flags);
 896                         return -EBUSY;
 897                 }
 898
 899         }
 900
 901         if (unlikely(reserved_peri_map[gpio_bank(ident)] & gpio_bit(ident))) {
 902
 903                 /*
 904                  * Pin functions like AMC address strobes my
 905                  * be requested and used by several drivers
 906                  */
 907
 908                 if (!(per & P_MAYSHARE)) {
 909
 910                         /*
 911                          * Allow that the identical pin function can
 912                          * be requested from the same driver twice
 913                          */
 914
 915                         if (cmp_label(ident, label) == 0)
 916                                 goto anyway;
 917
 918                         dump_stack();
 919                         printk(KERN_ERR
 920                                "%s: Peripheral %d function %d is already"
 921                                " reserved by %s !\n",
 922                                __func__, ident, P_FUNCT2MUX(per),
 923                                 get_label(ident));
 924                         local_irq_restore(flags);
 925                         return -EBUSY;
 926                 }
 927
 928         }
 929
 930  anyway:
 931         portmux_setup(per, P_FUNCT2MUX(per));
 932
 933         port_setup(ident, PERIPHERAL_USAGE);
 934
 935         reserved_peri_map[gpio_bank(ident)] |= gpio_bit(ident);
 936         local_irq_restore(flags);
 937         set_label(ident, label);
 938
 939         return 0;
 940 }
 941 EXPORT_SYMBOL(peripheral_request);
 942 #endif
 943
 944 int peripheral_request_list(unsigned short per[], const char *label)
 945 {
 946         u16 cnt;
 947         int ret;
 948
 949         for (cnt = 0; per[cnt] != 0; cnt++) {
 950
 951                 ret = peripheral_request(per[cnt], label);
 952
 953                 if (ret < 0) {
 954                         for ( ; cnt > 0; cnt--)
 955                                 peripheral_free(per[cnt - 1]);
 956
 957                         return ret;
 958                 }
 959         }
 960
 961         return 0;
 962 }
 963 EXPORT_SYMBOL(peripheral_request_list);
 964
 965 void peripheral_free(unsigned short per)
 966 {
 967         unsigned long flags;
 968         unsigned short ident = P_IDENT(per);
 969
 970         if (per & P_DONTCARE)
 971                 return;
 972
 973         if (!(per & P_DEFINED))
 974                 return;
 975
 976         if (check_gpio(ident) < 0)
 977                 return;
 978
 979         local_irq_save(flags);
 980
 981         if (unlikely(!(reserved_peri_map[gpio_bank(ident)] & gpio_bit(ident)))) {
 982                 local_irq_restore(flags);
 983                 return;
 984         }
 985
 986         if (!(per & P_MAYSHARE))
 987                 port_setup(ident, GPIO_USAGE);
 988
 989         reserved_peri_map[gpio_bank(ident)] &= ~gpio_bit(ident);
 990
 991         set_label(ident, "free");
 992
 993         local_irq_restore(flags);
 994 }
 995 EXPORT_SYMBOL(peripheral_free);
 996
 997 void peripheral_free_list(unsigned short per[])
 998 {
 999         u16 cnt;
1000         for (cnt = 0; per[cnt] != 0; cnt++)
1001                 peripheral_free(per[cnt]);
1002 }
1003 EXPORT_SYMBOL(peripheral_free_list);
1004
1005 /***********************************************************
1006 *
1007 * FUNCTIONS: Blackfin GPIO Driver
1008 *
1009 * INPUTS/OUTPUTS:
1010 * gpio  PIO Number between 0 and MAX_BLACKFIN_GPIOS
1011 * label String
1012 *
1013 * DESCRIPTION: Blackfin GPIO Driver API
1014 *
1015 * CAUTION:
1016 *************************************************************
1017 * MODIFICATION HISTORY :
1018 **************************************************************/
1019
1020 int gpio_request(unsigned gpio, const char *label)
1021 {
1022         unsigned long flags;
1023
1024         if (check_gpio(gpio) < 0)
1025                 return -EINVAL;
1026
1027         local_irq_save(flags);
1028
1029         /*
1030          * Allow that the identical GPIO can
1031          * be requested from the same driver twice
1032          * Do nothing and return -
1033          */
1034
1035         if (cmp_label(gpio, label) == 0) {
1036                 local_irq_restore(flags);
1037                 return 0;
1038         }
1039
1040         if (unlikely(reserved_gpio_map[gpio_bank(gpio)] & gpio_bit(gpio))) {
1041                 dump_stack();
1042                 printk(KERN_ERR "bfin-gpio: GPIO %d is already reserved by %s !\n",
1043                          gpio, get_label(gpio));
1044                 local_irq_restore(flags);
1045                 return -EBUSY;
1046         }
1047         if (unlikely(reserved_peri_map[gpio_bank(gpio)] & gpio_bit(gpio))) {
1048                 dump_stack();
1049                 printk(KERN_ERR
1050                        "bfin-gpio: GPIO %d is already reserved as Peripheral by %s !\n",
1051                        gpio, get_label(gpio));
1052                 local_irq_restore(flags);
1053                 return -EBUSY;
1054         }
1055
1056         reserved_gpio_map[gpio_bank(gpio)] |= gpio_bit(gpio);
1057
1058         local_irq_restore(flags);
1059
1060         port_setup(gpio, GPIO_USAGE);
1061         set_label(gpio, label);
1062
1063         return 0;
1064 }
1065 EXPORT_SYMBOL(gpio_request);
1066
1067 void gpio_free(unsigned gpio)
1068 {
1069         unsigned long flags;
1070
1071         if (check_gpio(gpio) < 0)
1072                 return;
1073
1074         local_irq_save(flags);
1075
1076         if (unlikely(!(reserved_gpio_map[gpio_bank(gpio)] & gpio_bit(gpio)))) {
1077                 dump_stack();
1078                 gpio_error(gpio);
1079                 local_irq_restore(flags);
1080                 return;
1081         }
1082
1083         default_gpio(gpio);
1084
1085         reserved_gpio_map[gpio_bank(gpio)] &= ~gpio_bit(gpio);
1086
1087         set_label(gpio, "free");
1088
1089         local_irq_restore(flags);
1090 }
1091 EXPORT_SYMBOL(gpio_free);
1092
1093
1094 #ifdef BF548_FAMILY
1095 int gpio_direction_input(unsigned gpio)
1096 {
1097         unsigned long flags;
1098
1099         if (!(reserved_gpio_map[gpio_bank(gpio)] & gpio_bit(gpio))) {
1100                 gpio_error(gpio);
1101                 return -EINVAL;
1102         }
1103
1104         local_irq_save(flags);
1105         gpio_array[gpio_bank(gpio)]->port_dir_clear = gpio_bit(gpio);
1106         gpio_array[gpio_bank(gpio)]->port_inen |= gpio_bit(gpio);
1107         local_irq_restore(flags);
1108
1109         return 0;
1110 }
1111 EXPORT_SYMBOL(gpio_direction_input);
1112
1113 int gpio_direction_output(unsigned gpio, int value)
1114 {
1115         unsigned long flags;
1116
1117         if (!(reserved_gpio_map[gpio_bank(gpio)] & gpio_bit(gpio))) {
1118                 gpio_error(gpio);
1119                 return -EINVAL;
1120         }
1121
1122         local_irq_save(flags);
1123         gpio_array[gpio_bank(gpio)]->port_inen &= ~gpio_bit(gpio);
1124         gpio_set_value(gpio, value);
1125         gpio_array[gpio_bank(gpio)]->port_dir_set = gpio_bit(gpio);
1126         local_irq_restore(flags);
1127
1128         return 0;
1129 }
1130 EXPORT_SYMBOL(gpio_direction_output);
1131
1132 void gpio_set_value(unsigned gpio, int arg)
1133 {
1134         if (arg)
1135                 gpio_array[gpio_bank(gpio)]->port_set = gpio_bit(gpio);
1136         else
1137                 gpio_array[gpio_bank(gpio)]->port_clear = gpio_bit(gpio);
1138 }
1139 EXPORT_SYMBOL(gpio_set_value);
1140
1141 int gpio_get_value(unsigned gpio)
1142 {
1143         return (1 & (gpio_array[gpio_bank(gpio)]->port_data >> gpio_sub_n(gpio)));
1144 }
1145 EXPORT_SYMBOL(gpio_get_value);
1146
1147 #else
1148
1149 int gpio_direction_input(unsigned gpio)
1150 {
1151         unsigned long flags;
1152
1153         if (!(reserved_gpio_map[gpio_bank(gpio)] & gpio_bit(gpio))) {
1154                 gpio_error(gpio);
1155                 return -EINVAL;
1156         }
1157
1158         local_irq_save(flags);
1159         gpio_bankb[gpio_bank(gpio)]->dir &= ~gpio_bit(gpio);
1160         gpio_bankb[gpio_bank(gpio)]->inen |= gpio_bit(gpio);
1161         AWA_DUMMY_READ(inen);
1162         local_irq_restore(flags);
1163
1164         return 0;
1165 }
1166 EXPORT_SYMBOL(gpio_direction_input);
1167
1168 int gpio_direction_output(unsigned gpio, int value)
1169 {
1170         unsigned long flags;
1171
1172         if (!(reserved_gpio_map[gpio_bank(gpio)] & gpio_bit(gpio))) {
1173                 gpio_error(gpio);
1174                 return -EINVAL;
1175         }
1176
1177         local_irq_save(flags);
1178         gpio_bankb[gpio_bank(gpio)]->inen &= ~gpio_bit(gpio);
1179
1180         if (value)
1181                 gpio_bankb[gpio_bank(gpio)]->data_set = gpio_bit(gpio);
1182         else
1183                 gpio_bankb[gpio_bank(gpio)]->data_clear = gpio_bit(gpio);
1184
1185         gpio_bankb[gpio_bank(gpio)]->dir |= gpio_bit(gpio);
1186         AWA_DUMMY_READ(dir);
1187         local_irq_restore(flags);
1188
1189         return 0;
1190 }
1191 EXPORT_SYMBOL(gpio_direction_output);
1192
1193 /* If we are booting from SPI and our board lacks a strong enough pull up,
1194  * the core can reset and execute the bootrom faster than the resistor can
1195  * pull the signal logically high.  To work around this (common) error in
1196  * board design, we explicitly set the pin back to GPIO mode, force /CS
1197  * high, and wait for the electrons to do their thing.
1198  *
1199  * This function only makes sense to be called from reset code, but it
1200  * lives here as we need to force all the GPIO states w/out going through
1201  * BUG() checks and such.
1202  */
1203 void bfin_gpio_reset_spi0_ssel1(void)
1204 {
1205         u16 gpio = P_IDENT(P_SPI0_SSEL1);
1206
1207         port_setup(gpio, GPIO_USAGE);
1208         gpio_bankb[gpio_bank(gpio)]->data_set = gpio_bit(gpio);
1209         AWA_DUMMY_READ(data_set);
1210         udelay(1);
1211 }
1212
1213 #endif /*BF548_FAMILY */
1214
1215 #if defined(CONFIG_PROC_FS)
1216 static int gpio_proc_read(char *buf, char **start, off_t offset,
1217                           int len, int *unused_i, void *unused_v)
1218 {
1219         int c, outlen = 0;
1220
1221         for (c = 0; c < MAX_RESOURCES; c++) {
1222                 if (!check_gpio(c) && (reserved_gpio_map[gpio_bank(c)] & gpio_bit(c)))
1223                         len = sprintf(buf, "GPIO_%d: %s \t\tGPIO %s\n", c,
1224                                  get_label(c), get_gpio_dir(c) ? "OUTPUT" : "INPUT");
1225                 else if (reserved_peri_map[gpio_bank(c)] & gpio_bit(c))
1226                         len = sprintf(buf, "GPIO_%d: %s \t\tPeripheral\n", c, get_label(c));
1227                 else
1228                         continue;
1229                 buf += len;
1230                 outlen += len;
1231         }
1232         return outlen;
1233 }
1234
1235 static __init int gpio_register_proc(void)
1236 {
1237         struct proc_dir_entry *proc_gpio;
1238
1239         proc_gpio = create_proc_entry("gpio", S_IRUGO, NULL);
1240         if (proc_gpio)
1241                 proc_gpio->read_proc = gpio_proc_read;
1242         return proc_gpio != NULL;
1243 }
1244 __initcall(gpio_register_proc);
1245 #endif