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 2007 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 <asm/blackfin.h>
  87 #include <asm/gpio.h>
  88 #include <asm/portmux.h>
  89 #include <linux/irq.h>
  90
  91 #if ANOMALY_05000311 || ANOMALY_05000323
  92 enum {
  93         AWA_data = SYSCR,
  94         AWA_data_clear = SYSCR,
  95         AWA_data_set = SYSCR,
  96         AWA_toggle = SYSCR,
  97         AWA_maska = UART_SCR,
  98         AWA_maska_clear = UART_SCR,
  99         AWA_maska_set = UART_SCR,
 100         AWA_maska_toggle = UART_SCR,
 101         AWA_maskb = UART_GCTL,
 102         AWA_maskb_clear = UART_GCTL,
 103         AWA_maskb_set = UART_GCTL,
 104         AWA_maskb_toggle = UART_GCTL,
 105         AWA_dir = SPORT1_STAT,
 106         AWA_polar = SPORT1_STAT,
 107         AWA_edge = SPORT1_STAT,
 108         AWA_both = SPORT1_STAT,
 109 #if ANOMALY_05000311
 110         AWA_inen = TIMER_ENABLE,
 111 #elif ANOMALY_05000323
 112         AWA_inen = DMA1_1_CONFIG,
 113 #endif
 114 };
 115         /* Anomaly Workaround */
 116 #define AWA_DUMMY_READ(name) bfin_read16(AWA_ ## name)
 117 #else
 118 #define AWA_DUMMY_READ(...)  do { } while (0)
 119 #endif
 120
 121 #ifdef BF533_FAMILY
 122 static struct gpio_port_t *gpio_bankb[gpio_bank(MAX_BLACKFIN_GPIOS)] = {
 123         (struct gpio_port_t *) FIO_FLAG_D,
 124 };
 125 #endif
 126
 127 #ifdef BF537_FAMILY
 128 static struct gpio_port_t *gpio_bankb[gpio_bank(MAX_BLACKFIN_GPIOS)] = {
 129         (struct gpio_port_t *) PORTFIO,
 130         (struct gpio_port_t *) PORTGIO,
 131         (struct gpio_port_t *) PORTHIO,
 132 };
 133
 134 static unsigned short *port_fer[gpio_bank(MAX_BLACKFIN_GPIOS)] = {
 135         (unsigned short *) PORTF_FER,
 136         (unsigned short *) PORTG_FER,
 137         (unsigned short *) PORTH_FER,
 138 };
 139
 140 #endif
 141
 142 #ifdef BF561_FAMILY
 143 static struct gpio_port_t *gpio_bankb[gpio_bank(MAX_BLACKFIN_GPIOS)] = {
 144         (struct gpio_port_t *) FIO0_FLAG_D,
 145         (struct gpio_port_t *) FIO1_FLAG_D,
 146         (struct gpio_port_t *) FIO2_FLAG_D,
 147 };
 148 #endif
 149
 150 #ifdef BF548_FAMILY
 151 static struct gpio_port_t *gpio_array[gpio_bank(MAX_BLACKFIN_GPIOS)] = {
 152         (struct gpio_port_t *)PORTA_FER,
 153         (struct gpio_port_t *)PORTB_FER,
 154         (struct gpio_port_t *)PORTC_FER,
 155         (struct gpio_port_t *)PORTD_FER,
 156         (struct gpio_port_t *)PORTE_FER,
 157         (struct gpio_port_t *)PORTF_FER,
 158         (struct gpio_port_t *)PORTG_FER,
 159         (struct gpio_port_t *)PORTH_FER,
 160         (struct gpio_port_t *)PORTI_FER,
 161         (struct gpio_port_t *)PORTJ_FER,
 162 };
 163 #endif
 164
 165 static unsigned short reserved_gpio_map[gpio_bank(MAX_BLACKFIN_GPIOS)];
 166 static unsigned short reserved_peri_map[gpio_bank(MAX_BLACKFIN_GPIOS + 16)];
 167
 168 #define MAX_RESOURCES           256
 169 #define RESOURCE_LABEL_SIZE     16
 170
 171 struct str_ident {
 172         char name[RESOURCE_LABEL_SIZE];
 173 } *str_ident;
 174
 175
 176 #ifdef CONFIG_PM
 177 static unsigned short wakeup_map[gpio_bank(MAX_BLACKFIN_GPIOS)];
 178 static unsigned char wakeup_flags_map[MAX_BLACKFIN_GPIOS];
 179 static struct gpio_port_s gpio_bank_saved[gpio_bank(MAX_BLACKFIN_GPIOS)];
 180
 181 #ifdef BF533_FAMILY
 182 static unsigned int sic_iwr_irqs[gpio_bank(MAX_BLACKFIN_GPIOS)] = {IRQ_PROG_INTB};
 183 #endif
 184
 185 #ifdef BF537_FAMILY
 186 static unsigned int sic_iwr_irqs[gpio_bank(MAX_BLACKFIN_GPIOS)] = {IRQ_PROG_INTB, IRQ_PORTG_INTB, IRQ_MAC_TX};
 187 #endif
 188
 189 #ifdef BF561_FAMILY
 190 static unsigned int sic_iwr_irqs[gpio_bank(MAX_BLACKFIN_GPIOS)] = {IRQ_PROG0_INTB, IRQ_PROG1_INTB, IRQ_PROG2_INTB};
 191 #endif
 192
 193 #endif /* CONFIG_PM */
 194
 195 #if defined(BF548_FAMILY)
 196 inline int check_gpio(unsigned short gpio)
 197 {
 198         if (gpio == GPIO_PB15 || gpio == GPIO_PC14 || gpio == GPIO_PC15
 199             || gpio == GPIO_PH14 || gpio == GPIO_PH15
 200             || gpio == GPIO_PJ14 || gpio == GPIO_PJ15
 201             || gpio > MAX_BLACKFIN_GPIOS)
 202                 return -EINVAL;
 203         return 0;
 204 }
 205 #else
 206 inline int check_gpio(unsigned short gpio)
 207 {
 208         if (gpio >= MAX_BLACKFIN_GPIOS)
 209                 return -EINVAL;
 210         return 0;
 211 }
 212 #endif
 213
 214 static void set_label(unsigned short ident, const char *label)
 215 {
 216
 217         if (label && str_ident) {
 218                 strncpy(str_ident[ident].name, label,
 219                          RESOURCE_LABEL_SIZE);
 220                 str_ident[ident].name[RESOURCE_LABEL_SIZE - 1] = 0;
 221         }
 222 }
 223
 224 static char *get_label(unsigned short ident)
 225 {
 226         if (!str_ident)
 227                 return "UNKNOWN";
 228
 229         return (*str_ident[ident].name ? str_ident[ident].name : "UNKNOWN");
 230 }
 231
 232 static int cmp_label(unsigned short ident, const char *label)
 233 {
 234         if (label && str_ident)
 235                 return strncmp(str_ident[ident].name,
 236                                  label, strlen(label));
 237         else
 238                 return -EINVAL;
 239 }
 240
 241 #ifdef BF537_FAMILY
 242 static void port_setup(unsigned short gpio, unsigned short usage)
 243 {
 244         if (!check_gpio(gpio)) {
 245                 if (usage == GPIO_USAGE)
 246                         *port_fer[gpio_bank(gpio)] &= ~gpio_bit(gpio);
 247                 else
 248                         *port_fer[gpio_bank(gpio)] |= gpio_bit(gpio);
 249                 SSYNC();
 250         }
 251 }
 252 #elif defined(BF548_FAMILY)
 253 static void port_setup(unsigned short gpio, unsigned short usage)
 254 {
 255         if (usage == GPIO_USAGE)
 256                 gpio_array[gpio_bank(gpio)]->port_fer &= ~gpio_bit(gpio);
 257         else
 258                 gpio_array[gpio_bank(gpio)]->port_fer |= gpio_bit(gpio);
 259         SSYNC();
 260 }
 261 #else
 262 # define port_setup(...)  do { } while (0)
 263 #endif
 264
 265 #ifdef BF537_FAMILY
 266 static struct {
 267         unsigned short res;
 268         unsigned short offset;
 269 } port_mux_lut[] = {
 270         {.res = P_PPI0_D13, .offset = 11},
 271         {.res = P_PPI0_D14, .offset = 11},
 272         {.res = P_PPI0_D15, .offset = 11},
 273         {.res = P_SPORT1_TFS, .offset = 11},
 274         {.res = P_SPORT1_TSCLK, .offset = 11},
 275         {.res = P_SPORT1_DTPRI, .offset = 11},
 276         {.res = P_PPI0_D10, .offset = 10},
 277         {.res = P_PPI0_D11, .offset = 10},
 278         {.res = P_PPI0_D12, .offset = 10},
 279         {.res = P_SPORT1_RSCLK, .offset = 10},
 280         {.res = P_SPORT1_RFS, .offset = 10},
 281         {.res = P_SPORT1_DRPRI, .offset = 10},
 282         {.res = P_PPI0_D8, .offset = 9},
 283         {.res = P_PPI0_D9, .offset = 9},
 284         {.res = P_SPORT1_DRSEC, .offset = 9},
 285         {.res = P_SPORT1_DTSEC, .offset = 9},
 286         {.res = P_TMR2, .offset = 8},
 287         {.res = P_PPI0_FS3, .offset = 8},
 288         {.res = P_TMR3, .offset = 7},
 289         {.res = P_SPI0_SSEL4, .offset = 7},
 290         {.res = P_TMR4, .offset = 6},
 291         {.res = P_SPI0_SSEL5, .offset = 6},
 292         {.res = P_TMR5, .offset = 5},
 293         {.res = P_SPI0_SSEL6, .offset = 5},
 294         {.res = P_UART1_RX, .offset = 4},
 295         {.res = P_UART1_TX, .offset = 4},
 296         {.res = P_TMR6, .offset = 4},
 297         {.res = P_TMR7, .offset = 4},
 298         {.res = P_UART0_RX, .offset = 3},
 299         {.res = P_UART0_TX, .offset = 3},
 300         {.res = P_DMAR0, .offset = 3},
 301         {.res = P_DMAR1, .offset = 3},
 302         {.res = P_SPORT0_DTSEC, .offset = 1},
 303         {.res = P_SPORT0_DRSEC, .offset = 1},
 304         {.res = P_CAN0_RX, .offset = 1},
 305         {.res = P_CAN0_TX, .offset = 1},
 306         {.res = P_SPI0_SSEL7, .offset = 1},
 307         {.res = P_SPORT0_TFS, .offset = 0},
 308         {.res = P_SPORT0_DTPRI, .offset = 0},
 309         {.res = P_SPI0_SSEL2, .offset = 0},
 310         {.res = P_SPI0_SSEL3, .offset = 0},
 311 };
 312
 313 static void portmux_setup(unsigned short per, unsigned short function)
 314 {
 315         u16 y, offset, muxreg;
 316
 317         for (y = 0; y < ARRAY_SIZE(port_mux_lut); y++) {
 318                 if (port_mux_lut[y].res == per) {
 319
 320                         /* SET PORTMUX REG */
 321
 322                         offset = port_mux_lut[y].offset;
 323                         muxreg = bfin_read_PORT_MUX();
 324
 325                         if (offset != 1) {
 326                                 muxreg &= ~(1 << offset);
 327                         } else {
 328                                 muxreg &= ~(3 << 1);
 329                         }
 330
 331                         muxreg |= (function << offset);
 332                         bfin_write_PORT_MUX(muxreg);
 333                 }
 334         }
 335 }
 336 #elif defined(BF548_FAMILY)
 337 inline void portmux_setup(unsigned short portno, unsigned short function)
 338 {
 339         u32 pmux;
 340
 341         pmux = gpio_array[gpio_bank(portno)]->port_mux;
 342
 343         pmux &= ~(0x3 << (2 * gpio_sub_n(portno)));
 344         pmux |= (function & 0x3) << (2 * gpio_sub_n(portno));
 345
 346         gpio_array[gpio_bank(portno)]->port_mux = pmux;
 347 }
 348
 349 inline u16 get_portmux(unsigned short portno)
 350 {
 351         u32 pmux;
 352
 353         pmux = gpio_array[gpio_bank(portno)]->port_mux;
 354
 355         return (pmux >> (2 * gpio_sub_n(portno)) & 0x3);
 356 }
 357 #else
 358 # define portmux_setup(...)  do { } while (0)
 359 #endif
 360
 361 #ifndef BF548_FAMILY
 362 static void default_gpio(unsigned short gpio)
 363 {
 364         unsigned short bank, bitmask;
 365         unsigned long flags;
 366
 367         bank = gpio_bank(gpio);
 368         bitmask = gpio_bit(gpio);
 369
 370         local_irq_save(flags);
 371
 372         gpio_bankb[bank]->maska_clear = bitmask;
 373         gpio_bankb[bank]->maskb_clear = bitmask;
 374         SSYNC();
 375         gpio_bankb[bank]->inen &= ~bitmask;
 376         gpio_bankb[bank]->dir &= ~bitmask;
 377         gpio_bankb[bank]->polar &= ~bitmask;
 378         gpio_bankb[bank]->both &= ~bitmask;
 379         gpio_bankb[bank]->edge &= ~bitmask;
 380         AWA_DUMMY_READ(edge);
 381         local_irq_restore(flags);
 382
 383 }
 384 #else
 385 # define default_gpio(...)  do { } while (0)
 386 #endif
 387
 388 static int __init bfin_gpio_init(void)
 389 {
 390         str_ident = kcalloc(MAX_RESOURCES,
 391                                  sizeof(struct str_ident), GFP_KERNEL);
 392         if (str_ident == NULL)
 393                 return -ENOMEM;
 394
 395         memset(str_ident, 0, MAX_RESOURCES * sizeof(struct str_ident));
 396
 397         printk(KERN_INFO "Blackfin GPIO Controller\n");
 398
 399         return 0;
 400
 401 }
 402 arch_initcall(bfin_gpio_init);
 403
 404
 405 #ifndef BF548_FAMILY
 406 /***********************************************************
 407 *
 408 * FUNCTIONS: Blackfin General Purpose Ports Access Functions
 409 *
 410 * INPUTS/OUTPUTS:
 411 * gpio - GPIO Number between 0 and MAX_BLACKFIN_GPIOS
 412 *
 413 *
 414 * DESCRIPTION: These functions abstract direct register access
 415 *              to Blackfin processor General Purpose
 416 *              Ports Regsiters
 417 *
 418 * CAUTION: These functions do not belong to the GPIO Driver API
 419 *************************************************************
 420 * MODIFICATION HISTORY :
 421 **************************************************************/
 422
 423 /* Set a specific bit */
 424
 425 #define SET_GPIO(name) \
 426 void set_gpio_ ## name(unsigned short gpio, unsigned short arg) \
 427 { \
 428         unsigned long flags; \
 429         BUG_ON(!(reserved_gpio_map[gpio_bank(gpio)] & gpio_bit(gpio))); \
 430         local_irq_save(flags); \
 431         if (arg) \
 432                 gpio_bankb[gpio_bank(gpio)]->name |= gpio_bit(gpio); \
 433         else \
 434                 gpio_bankb[gpio_bank(gpio)]->name &= ~gpio_bit(gpio); \
 435         AWA_DUMMY_READ(name); \
 436         local_irq_restore(flags); \
 437 } \
 438 EXPORT_SYMBOL(set_gpio_ ## name);
 439
 440 SET_GPIO(dir)
 441 SET_GPIO(inen)
 442 SET_GPIO(polar)
 443 SET_GPIO(edge)
 444 SET_GPIO(both)
 445
 446
 447 #if ANOMALY_05000311 || ANOMALY_05000323
 448 #define SET_GPIO_SC(name) \
 449 void set_gpio_ ## name(unsigned short gpio, unsigned short arg) \
 450 { \
 451         unsigned long flags; \
 452         BUG_ON(!(reserved_gpio_map[gpio_bank(gpio)] & gpio_bit(gpio))); \
 453         local_irq_save(flags); \
 454         if (arg) \
 455                 gpio_bankb[gpio_bank(gpio)]->name ## _set = gpio_bit(gpio); \
 456         else \
 457                 gpio_bankb[gpio_bank(gpio)]->name ## _clear = gpio_bit(gpio); \
 458         AWA_DUMMY_READ(name); \
 459         local_irq_restore(flags); \
 460 } \
 461 EXPORT_SYMBOL(set_gpio_ ## name);
 462 #else
 463 #define SET_GPIO_SC(name) \
 464 void set_gpio_ ## name(unsigned short gpio, unsigned short arg) \
 465 { \
 466         BUG_ON(!(reserved_gpio_map[gpio_bank(gpio)] & gpio_bit(gpio))); \
 467         if (arg) \
 468                 gpio_bankb[gpio_bank(gpio)]->name ## _set = gpio_bit(gpio); \
 469         else \
 470                 gpio_bankb[gpio_bank(gpio)]->name ## _clear = gpio_bit(gpio); \
 471 } \
 472 EXPORT_SYMBOL(set_gpio_ ## name);
 473 #endif
 474
 475 SET_GPIO_SC(maska)
 476 SET_GPIO_SC(maskb)
 477 SET_GPIO_SC(data)
 478
 479 #if ANOMALY_05000311 || ANOMALY_05000323
 480 void set_gpio_toggle(unsigned short gpio)
 481 {
 482         unsigned long flags;
 483         BUG_ON(!(reserved_gpio_map[gpio_bank(gpio)] & gpio_bit(gpio)));
 484         local_irq_save(flags);
 485         gpio_bankb[gpio_bank(gpio)]->toggle = gpio_bit(gpio);
 486         AWA_DUMMY_READ(toggle);
 487         local_irq_restore(flags);
 488 }
 489 #else
 490 void set_gpio_toggle(unsigned short gpio)
 491 {
 492         BUG_ON(!(reserved_gpio_map[gpio_bank(gpio)] & gpio_bit(gpio)));
 493         gpio_bankb[gpio_bank(gpio)]->toggle = gpio_bit(gpio);
 494 }
 495 #endif
 496 EXPORT_SYMBOL(set_gpio_toggle);
 497
 498
 499 /*Set current PORT date (16-bit word)*/
 500
 501 #if ANOMALY_05000311 || ANOMALY_05000323
 502 #define SET_GPIO_P(name) \
 503 void set_gpiop_ ## name(unsigned short gpio, unsigned short arg) \
 504 { \
 505         unsigned long flags; \
 506         local_irq_save(flags); \
 507         gpio_bankb[gpio_bank(gpio)]->name = arg; \
 508         AWA_DUMMY_READ(name); \
 509         local_irq_restore(flags); \
 510 } \
 511 EXPORT_SYMBOL(set_gpiop_ ## name);
 512 #else
 513 #define SET_GPIO_P(name) \
 514 void set_gpiop_ ## name(unsigned short gpio, unsigned short arg) \
 515 { \
 516         gpio_bankb[gpio_bank(gpio)]->name = arg; \
 517 } \
 518 EXPORT_SYMBOL(set_gpiop_ ## name);
 519 #endif
 520
 521 SET_GPIO_P(data)
 522 SET_GPIO_P(dir)
 523 SET_GPIO_P(inen)
 524 SET_GPIO_P(polar)
 525 SET_GPIO_P(edge)
 526 SET_GPIO_P(both)
 527 SET_GPIO_P(maska)
 528 SET_GPIO_P(maskb)
 529
 530
 531 /* Get a specific bit */
 532 #if ANOMALY_05000311 || ANOMALY_05000323
 533 #define GET_GPIO(name) \
 534 unsigned short get_gpio_ ## name(unsigned short gpio) \
 535 { \
 536         unsigned long flags; \
 537         unsigned short ret; \
 538         local_irq_save(flags); \
 539         ret = 0x01 & (gpio_bankb[gpio_bank(gpio)]->name >> gpio_sub_n(gpio)); \
 540         AWA_DUMMY_READ(name); \
 541         local_irq_restore(flags); \
 542         return ret; \
 543 } \
 544 EXPORT_SYMBOL(get_gpio_ ## name);
 545 #else
 546 #define GET_GPIO(name) \
 547 unsigned short get_gpio_ ## name(unsigned short gpio) \
 548 { \
 549         return (0x01 & (gpio_bankb[gpio_bank(gpio)]->name >> gpio_sub_n(gpio))); \
 550 } \
 551 EXPORT_SYMBOL(get_gpio_ ## name);
 552 #endif
 553
 554 GET_GPIO(data)
 555 GET_GPIO(dir)
 556 GET_GPIO(inen)
 557 GET_GPIO(polar)
 558 GET_GPIO(edge)
 559 GET_GPIO(both)
 560 GET_GPIO(maska)
 561 GET_GPIO(maskb)
 562
 563 /*Get current PORT date (16-bit word)*/
 564
 565 #if ANOMALY_05000311 || ANOMALY_05000323
 566 #define GET_GPIO_P(name) \
 567 unsigned short get_gpiop_ ## name(unsigned short gpio) \
 568 { \
 569         unsigned long flags; \
 570         unsigned short ret; \
 571         local_irq_save(flags); \
 572         ret = (gpio_bankb[gpio_bank(gpio)]->name); \
 573         AWA_DUMMY_READ(name); \
 574         local_irq_restore(flags); \
 575         return ret; \
 576 } \
 577 EXPORT_SYMBOL(get_gpiop_ ## name);
 578 #else
 579 #define GET_GPIO_P(name) \
 580 unsigned short get_gpiop_ ## name(unsigned short gpio) \
 581 { \
 582         return (gpio_bankb[gpio_bank(gpio)]->name);\
 583 } \
 584 EXPORT_SYMBOL(get_gpiop_ ## name);
 585 #endif
 586
 587 GET_GPIO_P(data)
 588 GET_GPIO_P(dir)
 589 GET_GPIO_P(inen)
 590 GET_GPIO_P(polar)
 591 GET_GPIO_P(edge)
 592 GET_GPIO_P(both)
 593 GET_GPIO_P(maska)
 594 GET_GPIO_P(maskb)
 595
 596
 597 #ifdef CONFIG_PM
 598 /***********************************************************
 599 *
 600 * FUNCTIONS: Blackfin PM Setup API
 601 *
 602 * INPUTS/OUTPUTS:
 603 * gpio - GPIO Number between 0 and MAX_BLACKFIN_GPIOS
 604 * type -
 605 *       PM_WAKE_RISING
 606 *       PM_WAKE_FALLING
 607 *       PM_WAKE_HIGH
 608 *       PM_WAKE_LOW
 609 *       PM_WAKE_BOTH_EDGES
 610 *
 611 * DESCRIPTION: Blackfin PM Driver API
 612 *
 613 * CAUTION:
 614 *************************************************************
 615 * MODIFICATION HISTORY :
 616 **************************************************************/
 617 int gpio_pm_wakeup_request(unsigned short gpio, unsigned char type)
 618 {
 619         unsigned long flags;
 620
 621         if ((check_gpio(gpio) < 0) || !type)
 622                 return -EINVAL;
 623
 624         local_irq_save(flags);
 625
 626         wakeup_map[gpio_bank(gpio)] |= gpio_bit(gpio);
 627         wakeup_flags_map[gpio] = type;
 628         local_irq_restore(flags);
 629
 630         return 0;
 631 }
 632 EXPORT_SYMBOL(gpio_pm_wakeup_request);
 633
 634 void gpio_pm_wakeup_free(unsigned short gpio)
 635 {
 636         unsigned long flags;
 637
 638         if (check_gpio(gpio) < 0)
 639                 return;
 640
 641         local_irq_save(flags);
 642
 643         wakeup_map[gpio_bank(gpio)] &= ~gpio_bit(gpio);
 644
 645         local_irq_restore(flags);
 646 }
 647 EXPORT_SYMBOL(gpio_pm_wakeup_free);
 648
 649 static int bfin_gpio_wakeup_type(unsigned short gpio, unsigned char type)
 650 {
 651         port_setup(gpio, GPIO_USAGE);
 652         set_gpio_dir(gpio, 0);
 653         set_gpio_inen(gpio, 1);
 654
 655         if (type & (PM_WAKE_RISING | PM_WAKE_FALLING))
 656                 set_gpio_edge(gpio, 1);
 657          else
 658                 set_gpio_edge(gpio, 0);
 659
 660         if ((type & (PM_WAKE_BOTH_EDGES)) == (PM_WAKE_BOTH_EDGES))
 661                 set_gpio_both(gpio, 1);
 662         else
 663                 set_gpio_both(gpio, 0);
 664
 665         if ((type & (PM_WAKE_FALLING | PM_WAKE_LOW)))
 666                 set_gpio_polar(gpio, 1);
 667         else
 668                 set_gpio_polar(gpio, 0);
 669
 670         SSYNC();
 671
 672         return 0;
 673 }
 674
 675 u32 gpio_pm_setup(void)
 676 {
 677         u32 sic_iwr = 0;
 678         u16 bank, mask, i, gpio;
 679
 680         for (i = 0; i < MAX_BLACKFIN_GPIOS; i += GPIO_BANKSIZE) {
 681                 mask = wakeup_map[gpio_bank(i)];
 682                 bank = gpio_bank(i);
 683
 684                 gpio_bank_saved[bank].maskb = gpio_bankb[bank]->maskb;
 685                 gpio_bankb[bank]->maskb = 0;
 686
 687                 if (mask) {
 688 #ifdef BF537_FAMILY
 689                         gpio_bank_saved[bank].fer   = *port_fer[bank];
 690 #endif
 691                         gpio_bank_saved[bank].inen  = gpio_bankb[bank]->inen;
 692                         gpio_bank_saved[bank].polar = gpio_bankb[bank]->polar;
 693                         gpio_bank_saved[bank].dir   = gpio_bankb[bank]->dir;
 694                         gpio_bank_saved[bank].edge  = gpio_bankb[bank]->edge;
 695                         gpio_bank_saved[bank].both  = gpio_bankb[bank]->both;
 696                         gpio_bank_saved[bank].reserved =
 697                                                 reserved_gpio_map[bank];
 698
 699                         gpio = i;
 700
 701                         while (mask) {
 702                                 if (mask & 1) {
 703                                         reserved_gpio_map[gpio_bank(gpio)] |=
 704                                                         gpio_bit(gpio);
 705                                         bfin_gpio_wakeup_type(gpio,
 706                                                 wakeup_flags_map[gpio]);
 707                                         set_gpio_data(gpio, 0); /*Clear*/
 708                                 }
 709                                 gpio++;
 710                                 mask >>= 1;
 711                         }
 712
 713                         sic_iwr |= 1 <<
 714                                 (sic_iwr_irqs[bank] - (IRQ_CORETMR + 1));
 715                         gpio_bankb[bank]->maskb_set = wakeup_map[gpio_bank(i)];
 716                 }
 717         }
 718
 719         AWA_DUMMY_READ(maskb_set);
 720
 721         if (sic_iwr)
 722                 return sic_iwr;
 723         else
 724                 return IWR_ENABLE_ALL;
 725 }
 726
 727 void gpio_pm_restore(void)
 728 {
 729         u16 bank, mask, i;
 730
 731         for (i = 0; i < MAX_BLACKFIN_GPIOS; i += GPIO_BANKSIZE) {
 732                 mask = wakeup_map[gpio_bank(i)];
 733                 bank = gpio_bank(i);
 734
 735                 if (mask) {
 736 #ifdef BF537_FAMILY
 737                         *port_fer[bank]         = gpio_bank_saved[bank].fer;
 738 #endif
 739                         gpio_bankb[bank]->inen  = gpio_bank_saved[bank].inen;
 740                         gpio_bankb[bank]->dir   = gpio_bank_saved[bank].dir;
 741                         gpio_bankb[bank]->polar = gpio_bank_saved[bank].polar;
 742                         gpio_bankb[bank]->edge  = gpio_bank_saved[bank].edge;
 743                         gpio_bankb[bank]->both  = gpio_bank_saved[bank].both;
 744
 745                         reserved_gpio_map[bank] =
 746                                         gpio_bank_saved[bank].reserved;
 747
 748                 }
 749
 750                 gpio_bankb[bank]->maskb = gpio_bank_saved[bank].maskb;
 751         }
 752         AWA_DUMMY_READ(maskb);
 753 }
 754
 755 #endif
 756 #endif /* BF548_FAMILY */
 757
 758 /***********************************************************
 759 *
 760 * FUNCTIONS:    Blackfin Peripheral Resource Allocation
 761 *               and PortMux Setup
 762 *
 763 * INPUTS/OUTPUTS:
 764 * per   Peripheral Identifier
 765 * label String
 766 *
 767 * DESCRIPTION: Blackfin Peripheral Resource Allocation and Setup API
 768 *
 769 * CAUTION:
 770 *************************************************************
 771 * MODIFICATION HISTORY :
 772 **************************************************************/
 773
 774 #ifdef BF548_FAMILY
 775 int peripheral_request(unsigned short per, const char *label)
 776 {
 777         unsigned long flags;
 778         unsigned short ident = P_IDENT(per);
 779
 780         /*
 781          * Don't cares are pins with only one dedicated function
 782          */
 783
 784         if (per & P_DONTCARE)
 785                 return 0;
 786
 787         if (!(per & P_DEFINED))
 788                 return -ENODEV;
 789
 790         if (check_gpio(ident) < 0)
 791                 return -EINVAL;
 792
 793         local_irq_save(flags);
 794
 795         if (unlikely(reserved_gpio_map[gpio_bank(ident)] & gpio_bit(ident))) {
 796                 printk(KERN_ERR
 797                     "%s: Peripheral %d is already reserved as GPIO by %s !\n",
 798                        __FUNCTION__, ident, get_label(ident));
 799                 dump_stack();
 800                 local_irq_restore(flags);
 801                 return -EBUSY;
 802         }
 803
 804         if (unlikely(reserved_peri_map[gpio_bank(ident)] & gpio_bit(ident))) {
 805
 806                 u16 funct = get_portmux(ident);
 807
 808         /*
 809          * Pin functions like AMC address strobes my
 810          * be requested and used by several drivers
 811          */
 812
 813                 if (!((per & P_MAYSHARE) && (funct == P_FUNCT2MUX(per)))) {
 814
 815                 /*
 816                  * Allow that the identical pin function can
 817                  * be requested from the same driver twice
 818                  */
 819
 820                 if (cmp_label(ident, label) == 0)
 821                         goto anyway;
 822
 823                         printk(KERN_ERR
 824                                "%s: Peripheral %d function %d is already reserved by %s !\n",
 825                                __FUNCTION__, ident, P_FUNCT2MUX(per), get_label(ident));
 826                         dump_stack();
 827                         local_irq_restore(flags);
 828                         return -EBUSY;
 829                 }
 830         }
 831
 832 anyway:
 833         reserved_peri_map[gpio_bank(ident)] |= gpio_bit(ident);
 834
 835         portmux_setup(ident, P_FUNCT2MUX(per));
 836         port_setup(ident, PERIPHERAL_USAGE);
 837
 838         local_irq_restore(flags);
 839         set_label(ident, label);
 840
 841         return 0;
 842 }
 843 EXPORT_SYMBOL(peripheral_request);
 844 #else
 845
 846 int peripheral_request(unsigned short per, const char *label)
 847 {
 848         unsigned long flags;
 849         unsigned short ident = P_IDENT(per);
 850
 851         /*
 852          * Don't cares are pins with only one dedicated function
 853          */
 854
 855         if (per & P_DONTCARE)
 856                 return 0;
 857
 858         if (!(per & P_DEFINED))
 859                 return -ENODEV;
 860
 861         local_irq_save(flags);
 862
 863         if (!check_gpio(ident)) {
 864
 865         if (unlikely(reserved_gpio_map[gpio_bank(ident)] & gpio_bit(ident))) {
 866                 printk(KERN_ERR
 867                        "%s: Peripheral %d is already reserved as GPIO by %s !\n",
 868                        __FUNCTION__, ident, get_label(ident));
 869                 dump_stack();
 870                 local_irq_restore(flags);
 871                 return -EBUSY;
 872         }
 873
 874         }
 875
 876         if (unlikely(reserved_peri_map[gpio_bank(ident)] & gpio_bit(ident))) {
 877
 878         /*
 879          * Pin functions like AMC address strobes my
 880          * be requested and used by several drivers
 881          */
 882
 883         if (!(per & P_MAYSHARE)) {
 884
 885         /*
 886          * Allow that the identical pin function can
 887          * be requested from the same driver twice
 888          */
 889
 890                 if (cmp_label(ident, label) == 0)
 891                         goto anyway;
 892
 893                         printk(KERN_ERR
 894                                "%s: Peripheral %d function %d is already"
 895                                " reserved by %s !\n",
 896                                __FUNCTION__, ident, P_FUNCT2MUX(per),
 897                                 get_label(ident));
 898                         dump_stack();
 899                         local_irq_restore(flags);
 900                         return -EBUSY;
 901                 }
 902
 903         }
 904
 905 anyway:
 906         portmux_setup(per, P_FUNCT2MUX(per));
 907
 908         port_setup(ident, PERIPHERAL_USAGE);
 909
 910         reserved_peri_map[gpio_bank(ident)] |= gpio_bit(ident);
 911         local_irq_restore(flags);
 912         set_label(ident, label);
 913
 914         return 0;
 915 }
 916 EXPORT_SYMBOL(peripheral_request);
 917 #endif
 918
 919 int peripheral_request_list(unsigned short per[], const char *label)
 920 {
 921         u16 cnt;
 922         int ret;
 923
 924         for (cnt = 0; per[cnt] != 0; cnt++) {
 925
 926                 ret = peripheral_request(per[cnt], label);
 927
 928                 if (ret < 0) {
 929                         for ( ; cnt > 0; cnt--) {
 930                                 peripheral_free(per[cnt - 1]);
 931                         }
 932                 return ret;
 933                 }
 934         }
 935
 936         return 0;
 937 }
 938 EXPORT_SYMBOL(peripheral_request_list);
 939
 940 void peripheral_free(unsigned short per)
 941 {
 942         unsigned long flags;
 943         unsigned short ident = P_IDENT(per);
 944
 945         if (per & P_DONTCARE)
 946                 return;
 947
 948         if (!(per & P_DEFINED))
 949                 return;
 950
 951         if (check_gpio(ident) < 0)
 952                 return;
 953
 954         local_irq_save(flags);
 955
 956         if (unlikely(!(reserved_peri_map[gpio_bank(ident)]
 957                          & gpio_bit(ident)))) {
 958                 local_irq_restore(flags);
 959                 return;
 960         }
 961
 962         if (!(per & P_MAYSHARE)) {
 963                 port_setup(ident, GPIO_USAGE);
 964         }
 965
 966         reserved_peri_map[gpio_bank(ident)] &= ~gpio_bit(ident);
 967
 968         set_label(ident, "free");
 969
 970         local_irq_restore(flags);
 971 }
 972 EXPORT_SYMBOL(peripheral_free);
 973
 974 void peripheral_free_list(unsigned short per[])
 975 {
 976         u16 cnt;
 977
 978         for (cnt = 0; per[cnt] != 0; cnt++) {
 979                 peripheral_free(per[cnt]);
 980         }
 981
 982 }
 983 EXPORT_SYMBOL(peripheral_free_list);
 984
 985 /***********************************************************
 986 *
 987 * FUNCTIONS: Blackfin GPIO Driver
 988 *
 989 * INPUTS/OUTPUTS:
 990 * gpio  PIO Number between 0 and MAX_BLACKFIN_GPIOS
 991 * label String
 992 *
 993 * DESCRIPTION: Blackfin GPIO Driver API
 994 *
 995 * CAUTION:
 996 *************************************************************
 997 * MODIFICATION HISTORY :
 998 **************************************************************/
 999
1000 int gpio_request(unsigned short gpio, const char *label)
1001 {
1002         unsigned long flags;
1003
1004         if (check_gpio(gpio) < 0)
1005                 return -EINVAL;
1006
1007         local_irq_save(flags);
1008
1009         /*
1010          * Allow that the identical GPIO can
1011          * be requested from the same driver twice
1012          * Do nothing and return -
1013          */
1014
1015         if (cmp_label(gpio, label) == 0) {
1016                 local_irq_restore(flags);
1017                 return 0;
1018         }
1019
1020         if (unlikely(reserved_gpio_map[gpio_bank(gpio)] & gpio_bit(gpio))) {
1021                 printk(KERN_ERR "bfin-gpio: GPIO %d is already reserved by %s !\n",
1022                          gpio, get_label(gpio));
1023                 dump_stack();
1024                 local_irq_restore(flags);
1025                 return -EBUSY;
1026         }
1027         if (unlikely(reserved_peri_map[gpio_bank(gpio)] & gpio_bit(gpio))) {
1028                 printk(KERN_ERR
1029                        "bfin-gpio: GPIO %d is already reserved as Peripheral by %s !\n",
1030                        gpio, get_label(gpio));
1031                 dump_stack();
1032                 local_irq_restore(flags);
1033                 return -EBUSY;
1034         }
1035
1036         reserved_gpio_map[gpio_bank(gpio)] |= gpio_bit(gpio);
1037
1038         local_irq_restore(flags);
1039
1040         port_setup(gpio, GPIO_USAGE);
1041         set_label(gpio, label);
1042
1043         return 0;
1044 }
1045 EXPORT_SYMBOL(gpio_request);
1046
1047 void gpio_free(unsigned short gpio)
1048 {
1049         unsigned long flags;
1050
1051         if (check_gpio(gpio) < 0)
1052                 return;
1053
1054         local_irq_save(flags);
1055
1056         if (unlikely(!(reserved_gpio_map[gpio_bank(gpio)] & gpio_bit(gpio)))) {
1057                 printk(KERN_ERR "bfin-gpio: GPIO %d wasn't reserved!\n", gpio);
1058                 dump_stack();
1059                 local_irq_restore(flags);
1060                 return;
1061         }
1062
1063         default_gpio(gpio);
1064
1065         reserved_gpio_map[gpio_bank(gpio)] &= ~gpio_bit(gpio);
1066
1067         set_label(gpio, "free");
1068
1069         local_irq_restore(flags);
1070 }
1071 EXPORT_SYMBOL(gpio_free);
1072
1073 #ifdef BF548_FAMILY
1074 void gpio_direction_input(unsigned short gpio)
1075 {
1076         unsigned long flags;
1077
1078         BUG_ON(!(reserved_gpio_map[gpio_bank(gpio)] & gpio_bit(gpio)));
1079
1080         local_irq_save(flags);
1081         gpio_array[gpio_bank(gpio)]->port_dir_clear = gpio_bit(gpio);
1082         gpio_array[gpio_bank(gpio)]->port_inen |= gpio_bit(gpio);
1083         local_irq_restore(flags);
1084 }
1085 EXPORT_SYMBOL(gpio_direction_input);
1086
1087 void gpio_direction_output(unsigned short gpio)
1088 {
1089         unsigned long flags;
1090
1091         BUG_ON(!(reserved_gpio_map[gpio_bank(gpio)] & gpio_bit(gpio)));
1092
1093         local_irq_save(flags);
1094         gpio_array[gpio_bank(gpio)]->port_inen &= ~gpio_bit(gpio);
1095         gpio_array[gpio_bank(gpio)]->port_dir_set = gpio_bit(gpio);
1096         local_irq_restore(flags);
1097 }
1098 EXPORT_SYMBOL(gpio_direction_output);
1099
1100 void gpio_set_value(unsigned short gpio, unsigned short arg)
1101 {
1102         if (arg)
1103                 gpio_array[gpio_bank(gpio)]->port_set = gpio_bit(gpio);
1104         else
1105                 gpio_array[gpio_bank(gpio)]->port_clear = gpio_bit(gpio);
1106
1107 }
1108 EXPORT_SYMBOL(gpio_set_value);
1109
1110 unsigned short gpio_get_value(unsigned short gpio)
1111 {
1112         return (1 & (gpio_array[gpio_bank(gpio)]->port_data >> gpio_sub_n(gpio)));
1113 }
1114 EXPORT_SYMBOL(gpio_get_value);
1115
1116 #else
1117
1118 void gpio_direction_input(unsigned short gpio)
1119 {
1120         unsigned long flags;
1121
1122         BUG_ON(!(reserved_gpio_map[gpio_bank(gpio)] & gpio_bit(gpio)));
1123
1124         local_irq_save(flags);
1125         gpio_bankb[gpio_bank(gpio)]->dir &= ~gpio_bit(gpio);
1126         gpio_bankb[gpio_bank(gpio)]->inen |= gpio_bit(gpio);
1127         AWA_DUMMY_READ(inen);
1128         local_irq_restore(flags);
1129 }
1130 EXPORT_SYMBOL(gpio_direction_input);
1131
1132 void gpio_direction_output(unsigned short gpio)
1133 {
1134         unsigned long flags;
1135
1136         BUG_ON(!(reserved_gpio_map[gpio_bank(gpio)] & gpio_bit(gpio)));
1137
1138         local_irq_save(flags);
1139         gpio_bankb[gpio_bank(gpio)]->inen &= ~gpio_bit(gpio);
1140         gpio_bankb[gpio_bank(gpio)]->dir |= gpio_bit(gpio);
1141         AWA_DUMMY_READ(dir);
1142         local_irq_restore(flags);
1143 }
1144 EXPORT_SYMBOL(gpio_direction_output);
1145
1146 /* If we are booting from SPI and our board lacks a strong enough pull up,
1147  * the core can reset and execute the bootrom faster than the resistor can
1148  * pull the signal logically high.  To work around this (common) error in
1149  * board design, we explicitly set the pin back to GPIO mode, force /CS
1150  * high, and wait for the electrons to do their thing.
1151  *
1152  * This function only makes sense to be called from reset code, but it
1153  * lives here as we need to force all the GPIO states w/out going through
1154  * BUG() checks and such.
1155  */
1156 void bfin_gpio_reset_spi0_ssel1(void)
1157 {
1158         u16 gpio = P_IDENT(P_SPI0_SSEL1);
1159
1160         port_setup(gpio, GPIO_USAGE);
1161         gpio_bankb[gpio_bank(gpio)]->data_set = gpio_bit(gpio);
1162         udelay(1);
1163 }
1164
1165 #endif /*BF548_FAMILY */