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 #ifdef CONFIG_PM
 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 gpio_pm_setup(void)
 700 {
 701         u32 sic_iwr = 0;
 702         u16 bank, mask, i, gpio;
 703
 704         for (i = 0; i < MAX_BLACKFIN_GPIOS; i += GPIO_BANKSIZE) {
 705                 mask = wakeup_map[gpio_bank(i)];
 706                 bank = gpio_bank(i);
 707
 708                 gpio_bank_saved[bank].maskb = gpio_bankb[bank]->maskb;
 709                 gpio_bankb[bank]->maskb = 0;
 710
 711                 if (mask) {
 712 #ifdef BF537_FAMILY
 713                         gpio_bank_saved[bank].fer   = *port_fer[bank];
 714 #endif
 715                         gpio_bank_saved[bank].inen  = gpio_bankb[bank]->inen;
 716                         gpio_bank_saved[bank].polar = gpio_bankb[bank]->polar;
 717                         gpio_bank_saved[bank].dir   = gpio_bankb[bank]->dir;
 718                         gpio_bank_saved[bank].edge  = gpio_bankb[bank]->edge;
 719                         gpio_bank_saved[bank].both  = gpio_bankb[bank]->both;
 720                         gpio_bank_saved[bank].reserved =
 721                                                 reserved_gpio_map[bank];
 722
 723                         gpio = i;
 724
 725                         while (mask) {
 726                                 if (mask & 1) {
 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                         sic_iwr |= 1 <<
 738                                 (sic_iwr_irqs[bank] - (IRQ_CORETMR + 1));
 739                         gpio_bankb[bank]->maskb_set = wakeup_map[gpio_bank(i)];
 740                 }
 741         }
 742
 743         AWA_DUMMY_READ(maskb_set);
 744
 745         if (sic_iwr)
 746                 return sic_iwr;
 747         else
 748                 return IWR_ENABLE_ALL;
 749 }
 750
 751 void gpio_pm_restore(void)
 752 {
 753         u16 bank, mask, i;
 754
 755         for (i = 0; i < MAX_BLACKFIN_GPIOS; i += GPIO_BANKSIZE) {
 756                 mask = wakeup_map[gpio_bank(i)];
 757                 bank = gpio_bank(i);
 758
 759                 if (mask) {
 760 #ifdef BF537_FAMILY
 761                         *port_fer[bank]         = gpio_bank_saved[bank].fer;
 762 #endif
 763                         gpio_bankb[bank]->inen  = gpio_bank_saved[bank].inen;
 764                         gpio_bankb[bank]->dir   = gpio_bank_saved[bank].dir;
 765                         gpio_bankb[bank]->polar = gpio_bank_saved[bank].polar;
 766                         gpio_bankb[bank]->edge  = gpio_bank_saved[bank].edge;
 767                         gpio_bankb[bank]->both  = gpio_bank_saved[bank].both;
 768
 769                         reserved_gpio_map[bank] =
 770                                         gpio_bank_saved[bank].reserved;
 771
 772                 }
 773
 774                 gpio_bankb[bank]->maskb = gpio_bank_saved[bank].maskb;
 775         }
 776         AWA_DUMMY_READ(maskb);
 777 }
 778
 779 #endif
 780 #else /* BF548_FAMILY */
 781
 782 unsigned short get_gpio_dir(unsigned gpio)
 783 {
 784         return (0x01 & (gpio_array[gpio_bank(gpio)]->port_dir_clear >> gpio_sub_n(gpio)));
 785 }
 786 EXPORT_SYMBOL(get_gpio_dir);
 787
 788 #endif /* BF548_FAMILY */
 789
 790 /***********************************************************
 791 *
 792 * FUNCTIONS:    Blackfin Peripheral Resource Allocation
 793 *               and PortMux Setup
 794 *
 795 * INPUTS/OUTPUTS:
 796 * per   Peripheral Identifier
 797 * label String
 798 *
 799 * DESCRIPTION: Blackfin Peripheral Resource Allocation and Setup API
 800 *
 801 * CAUTION:
 802 *************************************************************
 803 * MODIFICATION HISTORY :
 804 **************************************************************/
 805
 806 #ifdef BF548_FAMILY
 807 int peripheral_request(unsigned short per, const char *label)
 808 {
 809         unsigned long flags;
 810         unsigned short ident = P_IDENT(per);
 811
 812         /*
 813          * Don't cares are pins with only one dedicated function
 814          */
 815
 816         if (per & P_DONTCARE)
 817                 return 0;
 818
 819         if (!(per & P_DEFINED))
 820                 return -ENODEV;
 821
 822         if (check_gpio(ident) < 0)
 823                 return -EINVAL;
 824
 825         local_irq_save(flags);
 826
 827         if (unlikely(reserved_gpio_map[gpio_bank(ident)] & gpio_bit(ident))) {
 828                 printk(KERN_ERR
 829                     "%s: Peripheral %d is already reserved as GPIO by %s !\n",
 830                        __FUNCTION__, ident, get_label(ident));
 831                 dump_stack();
 832                 local_irq_restore(flags);
 833                 return -EBUSY;
 834         }
 835
 836         if (unlikely(reserved_peri_map[gpio_bank(ident)] & gpio_bit(ident))) {
 837
 838                 u16 funct = get_portmux(ident);
 839
 840         /*
 841          * Pin functions like AMC address strobes my
 842          * be requested and used by several drivers
 843          */
 844
 845                 if (!((per & P_MAYSHARE) && (funct == P_FUNCT2MUX(per)))) {
 846
 847                 /*
 848                  * Allow that the identical pin function can
 849                  * be requested from the same driver twice
 850                  */
 851
 852                 if (cmp_label(ident, label) == 0)
 853                         goto anyway;
 854
 855                         printk(KERN_ERR
 856                                "%s: Peripheral %d function %d is already reserved by %s !\n",
 857                                __FUNCTION__, ident, P_FUNCT2MUX(per), get_label(ident));
 858                         dump_stack();
 859                         local_irq_restore(flags);
 860                         return -EBUSY;
 861                 }
 862         }
 863
 864 anyway:
 865         reserved_peri_map[gpio_bank(ident)] |= gpio_bit(ident);
 866
 867         portmux_setup(ident, P_FUNCT2MUX(per));
 868         port_setup(ident, PERIPHERAL_USAGE);
 869
 870         local_irq_restore(flags);
 871         set_label(ident, label);
 872
 873         return 0;
 874 }
 875 EXPORT_SYMBOL(peripheral_request);
 876 #else
 877
 878 int peripheral_request(unsigned short per, const char *label)
 879 {
 880         unsigned long flags;
 881         unsigned short ident = P_IDENT(per);
 882
 883         /*
 884          * Don't cares are pins with only one dedicated function
 885          */
 886
 887         if (per & P_DONTCARE)
 888                 return 0;
 889
 890         if (!(per & P_DEFINED))
 891                 return -ENODEV;
 892
 893         local_irq_save(flags);
 894
 895         if (!check_gpio(ident)) {
 896
 897         if (unlikely(reserved_gpio_map[gpio_bank(ident)] & gpio_bit(ident))) {
 898                 printk(KERN_ERR
 899                        "%s: Peripheral %d is already reserved as GPIO by %s !\n",
 900                        __FUNCTION__, ident, get_label(ident));
 901                 dump_stack();
 902                 local_irq_restore(flags);
 903                 return -EBUSY;
 904         }
 905
 906         }
 907
 908         if (unlikely(reserved_peri_map[gpio_bank(ident)] & gpio_bit(ident))) {
 909
 910         /*
 911          * Pin functions like AMC address strobes my
 912          * be requested and used by several drivers
 913          */
 914
 915         if (!(per & P_MAYSHARE)) {
 916
 917         /*
 918          * Allow that the identical pin function can
 919          * be requested from the same driver twice
 920          */
 921
 922                 if (cmp_label(ident, label) == 0)
 923                         goto anyway;
 924
 925                         printk(KERN_ERR
 926                                "%s: Peripheral %d function %d is already"
 927                                " reserved by %s !\n",
 928                                __FUNCTION__, ident, P_FUNCT2MUX(per),
 929                                 get_label(ident));
 930                         dump_stack();
 931                         local_irq_restore(flags);
 932                         return -EBUSY;
 933                 }
 934
 935         }
 936
 937 anyway:
 938         portmux_setup(per, P_FUNCT2MUX(per));
 939
 940         port_setup(ident, PERIPHERAL_USAGE);
 941
 942         reserved_peri_map[gpio_bank(ident)] |= gpio_bit(ident);
 943         local_irq_restore(flags);
 944         set_label(ident, label);
 945
 946         return 0;
 947 }
 948 EXPORT_SYMBOL(peripheral_request);
 949 #endif
 950
 951 int peripheral_request_list(unsigned short per[], const char *label)
 952 {
 953         u16 cnt;
 954         int ret;
 955
 956         for (cnt = 0; per[cnt] != 0; cnt++) {
 957
 958                 ret = peripheral_request(per[cnt], label);
 959
 960                 if (ret < 0) {
 961                         for ( ; cnt > 0; cnt--) {
 962                                 peripheral_free(per[cnt - 1]);
 963                         }
 964                 return ret;
 965                 }
 966         }
 967
 968         return 0;
 969 }
 970 EXPORT_SYMBOL(peripheral_request_list);
 971
 972 void peripheral_free(unsigned short per)
 973 {
 974         unsigned long flags;
 975         unsigned short ident = P_IDENT(per);
 976
 977         if (per & P_DONTCARE)
 978                 return;
 979
 980         if (!(per & P_DEFINED))
 981                 return;
 982
 983         if (check_gpio(ident) < 0)
 984                 return;
 985
 986         local_irq_save(flags);
 987
 988         if (unlikely(!(reserved_peri_map[gpio_bank(ident)]
 989                          & gpio_bit(ident)))) {
 990                 local_irq_restore(flags);
 991                 return;
 992         }
 993
 994         if (!(per & P_MAYSHARE)) {
 995                 port_setup(ident, GPIO_USAGE);
 996         }
 997
 998         reserved_peri_map[gpio_bank(ident)] &= ~gpio_bit(ident);
 999
1000         set_label(ident, "free");
1001
1002         local_irq_restore(flags);
1003 }
1004 EXPORT_SYMBOL(peripheral_free);
1005
1006 void peripheral_free_list(unsigned short per[])
1007 {
1008         u16 cnt;
1009
1010         for (cnt = 0; per[cnt] != 0; cnt++) {
1011                 peripheral_free(per[cnt]);
1012         }
1013
1014 }
1015 EXPORT_SYMBOL(peripheral_free_list);
1016
1017 /***********************************************************
1018 *
1019 * FUNCTIONS: Blackfin GPIO Driver
1020 *
1021 * INPUTS/OUTPUTS:
1022 * gpio  PIO Number between 0 and MAX_BLACKFIN_GPIOS
1023 * label String
1024 *
1025 * DESCRIPTION: Blackfin GPIO Driver API
1026 *
1027 * CAUTION:
1028 *************************************************************
1029 * MODIFICATION HISTORY :
1030 **************************************************************/
1031
1032 int gpio_request(unsigned gpio, const char *label)
1033 {
1034         unsigned long flags;
1035
1036         if (check_gpio(gpio) < 0)
1037                 return -EINVAL;
1038
1039         local_irq_save(flags);
1040
1041         /*
1042          * Allow that the identical GPIO can
1043          * be requested from the same driver twice
1044          * Do nothing and return -
1045          */
1046
1047         if (cmp_label(gpio, label) == 0) {
1048                 local_irq_restore(flags);
1049                 return 0;
1050         }
1051
1052         if (unlikely(reserved_gpio_map[gpio_bank(gpio)] & gpio_bit(gpio))) {
1053                 printk(KERN_ERR "bfin-gpio: GPIO %d is already reserved by %s !\n",
1054                          gpio, get_label(gpio));
1055                 dump_stack();
1056                 local_irq_restore(flags);
1057                 return -EBUSY;
1058         }
1059         if (unlikely(reserved_peri_map[gpio_bank(gpio)] & gpio_bit(gpio))) {
1060                 printk(KERN_ERR
1061                        "bfin-gpio: GPIO %d is already reserved as Peripheral by %s !\n",
1062                        gpio, get_label(gpio));
1063                 dump_stack();
1064                 local_irq_restore(flags);
1065                 return -EBUSY;
1066         }
1067
1068         reserved_gpio_map[gpio_bank(gpio)] |= gpio_bit(gpio);
1069
1070         local_irq_restore(flags);
1071
1072         port_setup(gpio, GPIO_USAGE);
1073         set_label(gpio, label);
1074
1075         return 0;
1076 }
1077 EXPORT_SYMBOL(gpio_request);
1078
1079 void gpio_free(unsigned gpio)
1080 {
1081         unsigned long flags;
1082
1083         if (check_gpio(gpio) < 0)
1084                 return;
1085
1086         local_irq_save(flags);
1087
1088         if (unlikely(!(reserved_gpio_map[gpio_bank(gpio)] & gpio_bit(gpio)))) {
1089                 gpio_error(gpio);
1090                 dump_stack();
1091                 local_irq_restore(flags);
1092                 return;
1093         }
1094
1095         default_gpio(gpio);
1096
1097         reserved_gpio_map[gpio_bank(gpio)] &= ~gpio_bit(gpio);
1098
1099         set_label(gpio, "free");
1100
1101         local_irq_restore(flags);
1102 }
1103 EXPORT_SYMBOL(gpio_free);
1104
1105
1106 #ifdef BF548_FAMILY
1107 int gpio_direction_input(unsigned gpio)
1108 {
1109         unsigned long flags;
1110
1111         if (!(reserved_gpio_map[gpio_bank(gpio)] & gpio_bit(gpio))) {
1112                 gpio_error(gpio);
1113                 return -EINVAL;
1114         }
1115
1116         local_irq_save(flags);
1117         gpio_array[gpio_bank(gpio)]->port_dir_clear = gpio_bit(gpio);
1118         gpio_array[gpio_bank(gpio)]->port_inen |= gpio_bit(gpio);
1119         local_irq_restore(flags);
1120
1121         return 0;
1122 }
1123 EXPORT_SYMBOL(gpio_direction_input);
1124
1125 int gpio_direction_output(unsigned gpio, int value)
1126 {
1127         unsigned long flags;
1128
1129         if (!(reserved_gpio_map[gpio_bank(gpio)] & gpio_bit(gpio))) {
1130                 gpio_error(gpio);
1131                 return -EINVAL;
1132         }
1133
1134         local_irq_save(flags);
1135         gpio_array[gpio_bank(gpio)]->port_inen &= ~gpio_bit(gpio);
1136         gpio_set_value(gpio, value);
1137         gpio_array[gpio_bank(gpio)]->port_dir_set = gpio_bit(gpio);
1138         local_irq_restore(flags);
1139
1140         return 0;
1141 }
1142 EXPORT_SYMBOL(gpio_direction_output);
1143
1144 void gpio_set_value(unsigned gpio, int arg)
1145 {
1146         if (arg)
1147                 gpio_array[gpio_bank(gpio)]->port_set = gpio_bit(gpio);
1148         else
1149                 gpio_array[gpio_bank(gpio)]->port_clear = gpio_bit(gpio);
1150 }
1151 EXPORT_SYMBOL(gpio_set_value);
1152
1153 int gpio_get_value(unsigned gpio)
1154 {
1155         return (1 & (gpio_array[gpio_bank(gpio)]->port_data >> gpio_sub_n(gpio)));
1156 }
1157 EXPORT_SYMBOL(gpio_get_value);
1158
1159 #else
1160
1161 int gpio_direction_input(unsigned gpio)
1162 {
1163         unsigned long flags;
1164
1165         if (!(reserved_gpio_map[gpio_bank(gpio)] & gpio_bit(gpio))) {
1166                 gpio_error(gpio);
1167                 return -EINVAL;
1168         }
1169
1170         local_irq_save(flags);
1171         gpio_bankb[gpio_bank(gpio)]->dir &= ~gpio_bit(gpio);
1172         gpio_bankb[gpio_bank(gpio)]->inen |= gpio_bit(gpio);
1173         AWA_DUMMY_READ(inen);
1174         local_irq_restore(flags);
1175
1176         return 0;
1177 }
1178 EXPORT_SYMBOL(gpio_direction_input);
1179
1180 int gpio_direction_output(unsigned gpio, int value)
1181 {
1182         unsigned long flags;
1183
1184         if (!(reserved_gpio_map[gpio_bank(gpio)] & gpio_bit(gpio))) {
1185                 gpio_error(gpio);
1186                 return -EINVAL;
1187         }
1188
1189         local_irq_save(flags);
1190         gpio_bankb[gpio_bank(gpio)]->inen &= ~gpio_bit(gpio);
1191
1192         if (value)
1193                 gpio_bankb[gpio_bank(gpio)]->data_set = gpio_bit(gpio);
1194         else
1195                 gpio_bankb[gpio_bank(gpio)]->data_clear = gpio_bit(gpio);
1196
1197         gpio_bankb[gpio_bank(gpio)]->dir |= gpio_bit(gpio);
1198         AWA_DUMMY_READ(dir);
1199         local_irq_restore(flags);
1200
1201         return 0;
1202 }
1203 EXPORT_SYMBOL(gpio_direction_output);
1204
1205 /* If we are booting from SPI and our board lacks a strong enough pull up,
1206  * the core can reset and execute the bootrom faster than the resistor can
1207  * pull the signal logically high.  To work around this (common) error in
1208  * board design, we explicitly set the pin back to GPIO mode, force /CS
1209  * high, and wait for the electrons to do their thing.
1210  *
1211  * This function only makes sense to be called from reset code, but it
1212  * lives here as we need to force all the GPIO states w/out going through
1213  * BUG() checks and such.
1214  */
1215 void bfin_gpio_reset_spi0_ssel1(void)
1216 {
1217         u16 gpio = P_IDENT(P_SPI0_SSEL1);
1218
1219         port_setup(gpio, GPIO_USAGE);
1220         gpio_bankb[gpio_bank(gpio)]->data_set = gpio_bit(gpio);
1221         AWA_DUMMY_READ(data_set);
1222         udelay(1);
1223 }
1224
1225 #endif /*BF548_FAMILY */
1226
1227 #if defined(CONFIG_PROC_FS)
1228 static int gpio_proc_read(char *buf, char **start, off_t offset,
1229                           int len, int *unused_i, void *unused_v)
1230 {
1231         int c, outlen = 0;
1232
1233         for (c = 0; c < MAX_RESOURCES; c++) {
1234                 if (!check_gpio(c) && (reserved_gpio_map[gpio_bank(c)] & gpio_bit(c)))
1235                         len = sprintf(buf, "GPIO_%d: %s \t\tGPIO %s\n", c,
1236                                  get_label(c), get_gpio_dir(c) ? "OUTPUT" : "INPUT");
1237                 else if (reserved_peri_map[gpio_bank(c)] & gpio_bit(c))
1238                         len = sprintf(buf, "GPIO_%d: %s \t\tPeripheral\n", c, get_label(c));
1239                 else
1240                         continue;
1241                 buf += len;
1242                 outlen += len;
1243         }
1244         return outlen;
1245 }
1246
1247 static __init int gpio_register_proc(void)
1248 {
1249         struct proc_dir_entry *proc_gpio;
1250
1251         proc_gpio = create_proc_entry("gpio", S_IRUGO, NULL);
1252         if (proc_gpio)
1253                 proc_gpio->read_proc = gpio_proc_read;
1254         return proc_gpio != NULL;
1255 }
1256 __initcall(gpio_register_proc);
1257 #endif