2 * File: arch/blackfin/kernel/bfin_gpio.c
4 * Author: Michael Hennerich (hennerich@blackfin.uclinux.org)
7 * Description: GPIO Abstraction Layer
10 * Copyright 2008 Analog Devices Inc.
12 * Bugs: Enter bugs at http://blackfin.uclinux.org/
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.
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.
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
31 * Number BF537/6/4 BF561 BF533/2/1 BF549/8/4/2
33 * GPIO_0 PF0 PF0 PF0 PA0...PJ13
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
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>
89 #include <asm/portmux.h>
90 #include <linux/irq.h>
92 #if ANOMALY_05000311 || ANOMALY_05000323
95 AWA_data_clear = SYSCR,
98 AWA_maska = BFIN_UART_SCR,
99 AWA_maska_clear = BFIN_UART_SCR,
100 AWA_maska_set = BFIN_UART_SCR,
101 AWA_maska_toggle = BFIN_UART_SCR,
102 AWA_maskb = BFIN_UART_GCTL,
103 AWA_maskb_clear = BFIN_UART_GCTL,
104 AWA_maskb_set = BFIN_UART_GCTL,
105 AWA_maskb_toggle = BFIN_UART_GCTL,
106 AWA_dir = SPORT1_STAT,
107 AWA_polar = SPORT1_STAT,
108 AWA_edge = SPORT1_STAT,
109 AWA_both = SPORT1_STAT,
111 AWA_inen = TIMER_ENABLE,
112 #elif ANOMALY_05000323
113 AWA_inen = DMA1_1_CONFIG,
116 /* Anomaly Workaround */
117 #define AWA_DUMMY_READ(name) bfin_read16(AWA_ ## name)
119 #define AWA_DUMMY_READ(...) do { } while (0)
122 #if defined(BF533_FAMILY) || defined(BF538_FAMILY)
123 static struct gpio_port_t *gpio_bankb[gpio_bank(MAX_BLACKFIN_GPIOS)] = {
124 (struct gpio_port_t *) FIO_FLAG_D,
128 #if defined(BF527_FAMILY) || defined(BF537_FAMILY) || defined(BF518_FAMILY)
129 static struct gpio_port_t *gpio_bankb[gpio_bank(MAX_BLACKFIN_GPIOS)] = {
130 (struct gpio_port_t *) PORTFIO,
131 (struct gpio_port_t *) PORTGIO,
132 (struct gpio_port_t *) PORTHIO,
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,
142 #if defined(BF527_FAMILY) || defined(BF518_FAMILY)
143 static unsigned short *port_mux[gpio_bank(MAX_BLACKFIN_GPIOS)] = {
144 (unsigned short *) PORTF_MUX,
145 (unsigned short *) PORTG_MUX,
146 (unsigned short *) PORTH_MUX,
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 */
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,
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,
180 static unsigned short reserved_gpio_map[gpio_bank(MAX_BLACKFIN_GPIOS)];
181 static unsigned short reserved_peri_map[gpio_bank(MAX_RESOURCES)];
183 #define RESOURCE_LABEL_SIZE 16
185 static struct str_ident {
186 char name[RESOURCE_LABEL_SIZE];
187 } str_ident[MAX_RESOURCES];
189 #if defined(CONFIG_PM)
190 #if defined(CONFIG_BF54x)
191 static struct gpio_port_s gpio_bank_saved[gpio_bank(MAX_BLACKFIN_GPIOS)];
193 static unsigned short wakeup_map[gpio_bank(MAX_BLACKFIN_GPIOS)];
194 static unsigned char wakeup_flags_map[MAX_BLACKFIN_GPIOS];
195 static struct gpio_port_s gpio_bank_saved[gpio_bank(MAX_BLACKFIN_GPIOS)];
198 static unsigned int sic_iwr_irqs[gpio_bank(MAX_BLACKFIN_GPIOS)] = {IRQ_PROG_INTB};
202 static unsigned int sic_iwr_irqs[gpio_bank(MAX_BLACKFIN_GPIOS)] = {IRQ_PROG_INTB, IRQ_PORTG_INTB, IRQ_MAC_TX};
206 static unsigned int sic_iwr_irqs[gpio_bank(MAX_BLACKFIN_GPIOS)] = {IRQ_PORTF_INTB};
209 #if defined(BF527_FAMILY) || defined(BF518_FAMILY)
210 static unsigned int sic_iwr_irqs[gpio_bank(MAX_BLACKFIN_GPIOS)] = {IRQ_PORTF_INTB, IRQ_PORTG_INTB, IRQ_PORTH_INTB};
214 static unsigned int sic_iwr_irqs[gpio_bank(MAX_BLACKFIN_GPIOS)] = {IRQ_PROG0_INTB, IRQ_PROG1_INTB, IRQ_PROG2_INTB};
217 #endif /* CONFIG_PM */
219 inline int check_gpio(unsigned gpio)
221 #if defined(BF548_FAMILY)
222 if (gpio == GPIO_PB15 || gpio == GPIO_PC14 || gpio == GPIO_PC15
223 || gpio == GPIO_PH14 || gpio == GPIO_PH15
224 || gpio == GPIO_PJ14 || gpio == GPIO_PJ15)
227 if (gpio >= MAX_BLACKFIN_GPIOS)
232 static void gpio_error(unsigned gpio)
234 printk(KERN_ERR "bfin-gpio: GPIO %d wasn't requested!\n", gpio);
237 static void set_label(unsigned short ident, const char *label)
240 strncpy(str_ident[ident].name, label,
241 RESOURCE_LABEL_SIZE);
242 str_ident[ident].name[RESOURCE_LABEL_SIZE - 1] = 0;
246 static char *get_label(unsigned short ident)
248 return (*str_ident[ident].name ? str_ident[ident].name : "UNKNOWN");
251 static int cmp_label(unsigned short ident, const char *label)
255 printk(KERN_ERR "Please provide none-null label\n");
259 return strncmp(str_ident[ident].name,
260 label, strlen(label));
265 #if defined(BF527_FAMILY) || defined(BF537_FAMILY) || defined(BF518_FAMILY)
266 static void port_setup(unsigned gpio, unsigned short usage)
268 if (!check_gpio(gpio)) {
269 if (usage == GPIO_USAGE)
270 *port_fer[gpio_bank(gpio)] &= ~gpio_bit(gpio);
272 *port_fer[gpio_bank(gpio)] |= gpio_bit(gpio);
276 #elif defined(BF548_FAMILY)
277 static void port_setup(unsigned gpio, unsigned short usage)
279 if (usage == GPIO_USAGE)
280 gpio_array[gpio_bank(gpio)]->port_fer &= ~gpio_bit(gpio);
282 gpio_array[gpio_bank(gpio)]->port_fer |= gpio_bit(gpio);
286 # define port_setup(...) do { } while (0)
292 unsigned short offset;
294 {.res = P_PPI0_D13, .offset = 11},
295 {.res = P_PPI0_D14, .offset = 11},
296 {.res = P_PPI0_D15, .offset = 11},
297 {.res = P_SPORT1_TFS, .offset = 11},
298 {.res = P_SPORT1_TSCLK, .offset = 11},
299 {.res = P_SPORT1_DTPRI, .offset = 11},
300 {.res = P_PPI0_D10, .offset = 10},
301 {.res = P_PPI0_D11, .offset = 10},
302 {.res = P_PPI0_D12, .offset = 10},
303 {.res = P_SPORT1_RSCLK, .offset = 10},
304 {.res = P_SPORT1_RFS, .offset = 10},
305 {.res = P_SPORT1_DRPRI, .offset = 10},
306 {.res = P_PPI0_D8, .offset = 9},
307 {.res = P_PPI0_D9, .offset = 9},
308 {.res = P_SPORT1_DRSEC, .offset = 9},
309 {.res = P_SPORT1_DTSEC, .offset = 9},
310 {.res = P_TMR2, .offset = 8},
311 {.res = P_PPI0_FS3, .offset = 8},
312 {.res = P_TMR3, .offset = 7},
313 {.res = P_SPI0_SSEL4, .offset = 7},
314 {.res = P_TMR4, .offset = 6},
315 {.res = P_SPI0_SSEL5, .offset = 6},
316 {.res = P_TMR5, .offset = 5},
317 {.res = P_SPI0_SSEL6, .offset = 5},
318 {.res = P_UART1_RX, .offset = 4},
319 {.res = P_UART1_TX, .offset = 4},
320 {.res = P_TMR6, .offset = 4},
321 {.res = P_TMR7, .offset = 4},
322 {.res = P_UART0_RX, .offset = 3},
323 {.res = P_UART0_TX, .offset = 3},
324 {.res = P_DMAR0, .offset = 3},
325 {.res = P_DMAR1, .offset = 3},
326 {.res = P_SPORT0_DTSEC, .offset = 1},
327 {.res = P_SPORT0_DRSEC, .offset = 1},
328 {.res = P_CAN0_RX, .offset = 1},
329 {.res = P_CAN0_TX, .offset = 1},
330 {.res = P_SPI0_SSEL7, .offset = 1},
331 {.res = P_SPORT0_TFS, .offset = 0},
332 {.res = P_SPORT0_DTPRI, .offset = 0},
333 {.res = P_SPI0_SSEL2, .offset = 0},
334 {.res = P_SPI0_SSEL3, .offset = 0},
337 static void portmux_setup(unsigned short per, unsigned short function)
339 u16 y, offset, muxreg;
341 for (y = 0; y < ARRAY_SIZE(port_mux_lut); y++) {
342 if (port_mux_lut[y].res == per) {
344 /* SET PORTMUX REG */
346 offset = port_mux_lut[y].offset;
347 muxreg = bfin_read_PORT_MUX();
350 muxreg &= ~(1 << offset);
354 muxreg |= (function << offset);
355 bfin_write_PORT_MUX(muxreg);
359 #elif defined(BF548_FAMILY)
360 inline void portmux_setup(unsigned short portno, unsigned short function)
364 pmux = gpio_array[gpio_bank(portno)]->port_mux;
366 pmux &= ~(0x3 << (2 * gpio_sub_n(portno)));
367 pmux |= (function & 0x3) << (2 * gpio_sub_n(portno));
369 gpio_array[gpio_bank(portno)]->port_mux = pmux;
372 inline u16 get_portmux(unsigned short portno)
376 pmux = gpio_array[gpio_bank(portno)]->port_mux;
378 return (pmux >> (2 * gpio_sub_n(portno)) & 0x3);
380 #elif defined(BF527_FAMILY) || defined(BF518_FAMILY)
381 inline void portmux_setup(unsigned short portno, unsigned short function)
383 u16 pmux, ident = P_IDENT(portno);
384 u8 offset = pmux_offset[gpio_bank(ident)][gpio_sub_n(ident)];
386 pmux = *port_mux[gpio_bank(ident)];
387 pmux &= ~(3 << offset);
388 pmux |= (function & 3) << offset;
389 *port_mux[gpio_bank(ident)] = pmux;
393 # define portmux_setup(...) do { } while (0)
396 static int __init bfin_gpio_init(void)
398 printk(KERN_INFO "Blackfin GPIO Controller\n");
402 arch_initcall(bfin_gpio_init);
406 /***********************************************************
408 * FUNCTIONS: Blackfin General Purpose Ports Access Functions
411 * gpio - GPIO Number between 0 and MAX_BLACKFIN_GPIOS
414 * DESCRIPTION: These functions abstract direct register access
415 * to Blackfin processor General Purpose
418 * CAUTION: These functions do not belong to the GPIO Driver API
419 *************************************************************
420 * MODIFICATION HISTORY :
421 **************************************************************/
423 /* Set a specific bit */
425 #define SET_GPIO(name) \
426 void set_gpio_ ## name(unsigned gpio, unsigned short arg) \
428 unsigned long flags; \
429 local_irq_save(flags); \
431 gpio_bankb[gpio_bank(gpio)]->name |= gpio_bit(gpio); \
433 gpio_bankb[gpio_bank(gpio)]->name &= ~gpio_bit(gpio); \
434 AWA_DUMMY_READ(name); \
435 local_irq_restore(flags); \
437 EXPORT_SYMBOL(set_gpio_ ## name);
446 #if ANOMALY_05000311 || ANOMALY_05000323
447 #define SET_GPIO_SC(name) \
448 void set_gpio_ ## name(unsigned gpio, unsigned short arg) \
450 unsigned long flags; \
451 local_irq_save(flags); \
453 gpio_bankb[gpio_bank(gpio)]->name ## _set = gpio_bit(gpio); \
455 gpio_bankb[gpio_bank(gpio)]->name ## _clear = gpio_bit(gpio); \
456 AWA_DUMMY_READ(name); \
457 local_irq_restore(flags); \
459 EXPORT_SYMBOL(set_gpio_ ## name);
461 #define SET_GPIO_SC(name) \
462 void set_gpio_ ## name(unsigned gpio, unsigned short arg) \
465 gpio_bankb[gpio_bank(gpio)]->name ## _set = gpio_bit(gpio); \
467 gpio_bankb[gpio_bank(gpio)]->name ## _clear = gpio_bit(gpio); \
469 EXPORT_SYMBOL(set_gpio_ ## name);
476 #if ANOMALY_05000311 || ANOMALY_05000323
477 void set_gpio_toggle(unsigned gpio)
480 local_irq_save(flags);
481 gpio_bankb[gpio_bank(gpio)]->toggle = gpio_bit(gpio);
482 AWA_DUMMY_READ(toggle);
483 local_irq_restore(flags);
486 void set_gpio_toggle(unsigned gpio)
488 gpio_bankb[gpio_bank(gpio)]->toggle = gpio_bit(gpio);
491 EXPORT_SYMBOL(set_gpio_toggle);
494 /*Set current PORT date (16-bit word)*/
496 #if ANOMALY_05000311 || ANOMALY_05000323
497 #define SET_GPIO_P(name) \
498 void set_gpiop_ ## name(unsigned gpio, unsigned short arg) \
500 unsigned long flags; \
501 local_irq_save(flags); \
502 gpio_bankb[gpio_bank(gpio)]->name = arg; \
503 AWA_DUMMY_READ(name); \
504 local_irq_restore(flags); \
506 EXPORT_SYMBOL(set_gpiop_ ## name);
508 #define SET_GPIO_P(name) \
509 void set_gpiop_ ## name(unsigned gpio, unsigned short arg) \
511 gpio_bankb[gpio_bank(gpio)]->name = arg; \
513 EXPORT_SYMBOL(set_gpiop_ ## name);
525 /* Get a specific bit */
526 #if ANOMALY_05000311 || ANOMALY_05000323
527 #define GET_GPIO(name) \
528 unsigned short get_gpio_ ## name(unsigned gpio) \
530 unsigned long flags; \
531 unsigned short ret; \
532 local_irq_save(flags); \
533 ret = 0x01 & (gpio_bankb[gpio_bank(gpio)]->name >> gpio_sub_n(gpio)); \
534 AWA_DUMMY_READ(name); \
535 local_irq_restore(flags); \
538 EXPORT_SYMBOL(get_gpio_ ## name);
540 #define GET_GPIO(name) \
541 unsigned short get_gpio_ ## name(unsigned gpio) \
543 return (0x01 & (gpio_bankb[gpio_bank(gpio)]->name >> gpio_sub_n(gpio))); \
545 EXPORT_SYMBOL(get_gpio_ ## name);
557 /*Get current PORT date (16-bit word)*/
559 #if ANOMALY_05000311 || ANOMALY_05000323
560 #define GET_GPIO_P(name) \
561 unsigned short get_gpiop_ ## name(unsigned gpio) \
563 unsigned long flags; \
564 unsigned short ret; \
565 local_irq_save(flags); \
566 ret = (gpio_bankb[gpio_bank(gpio)]->name); \
567 AWA_DUMMY_READ(name); \
568 local_irq_restore(flags); \
571 EXPORT_SYMBOL(get_gpiop_ ## name);
573 #define GET_GPIO_P(name) \
574 unsigned short get_gpiop_ ## name(unsigned gpio) \
576 return (gpio_bankb[gpio_bank(gpio)]->name);\
578 EXPORT_SYMBOL(get_gpiop_ ## name);
592 /***********************************************************
594 * FUNCTIONS: Blackfin PM Setup API
597 * gpio - GPIO Number between 0 and MAX_BLACKFIN_GPIOS
605 * DESCRIPTION: Blackfin PM Driver API
608 *************************************************************
609 * MODIFICATION HISTORY :
610 **************************************************************/
611 int gpio_pm_wakeup_request(unsigned gpio, unsigned char type)
615 if ((check_gpio(gpio) < 0) || !type)
618 local_irq_save(flags);
619 wakeup_map[gpio_bank(gpio)] |= gpio_bit(gpio);
620 wakeup_flags_map[gpio] = type;
621 local_irq_restore(flags);
625 EXPORT_SYMBOL(gpio_pm_wakeup_request);
627 void gpio_pm_wakeup_free(unsigned gpio)
631 if (check_gpio(gpio) < 0)
634 local_irq_save(flags);
636 wakeup_map[gpio_bank(gpio)] &= ~gpio_bit(gpio);
638 local_irq_restore(flags);
640 EXPORT_SYMBOL(gpio_pm_wakeup_free);
642 static int bfin_gpio_wakeup_type(unsigned gpio, unsigned char type)
644 port_setup(gpio, GPIO_USAGE);
645 set_gpio_dir(gpio, 0);
646 set_gpio_inen(gpio, 1);
648 if (type & (PM_WAKE_RISING | PM_WAKE_FALLING))
649 set_gpio_edge(gpio, 1);
651 set_gpio_edge(gpio, 0);
653 if ((type & (PM_WAKE_BOTH_EDGES)) == (PM_WAKE_BOTH_EDGES))
654 set_gpio_both(gpio, 1);
656 set_gpio_both(gpio, 0);
658 if ((type & (PM_WAKE_FALLING | PM_WAKE_LOW)))
659 set_gpio_polar(gpio, 1);
661 set_gpio_polar(gpio, 0);
668 u32 bfin_pm_standby_setup(void)
670 u16 bank, mask, i, gpio;
672 for (i = 0; i < MAX_BLACKFIN_GPIOS; i += GPIO_BANKSIZE) {
673 mask = wakeup_map[gpio_bank(i)];
676 gpio_bank_saved[bank].maskb = gpio_bankb[bank]->maskb;
677 gpio_bankb[bank]->maskb = 0;
680 #if defined(BF527_FAMILY) || defined(BF537_FAMILY) || defined(BF518_FAMILY)
681 gpio_bank_saved[bank].fer = *port_fer[bank];
683 gpio_bank_saved[bank].inen = gpio_bankb[bank]->inen;
684 gpio_bank_saved[bank].polar = gpio_bankb[bank]->polar;
685 gpio_bank_saved[bank].dir = gpio_bankb[bank]->dir;
686 gpio_bank_saved[bank].edge = gpio_bankb[bank]->edge;
687 gpio_bank_saved[bank].both = gpio_bankb[bank]->both;
688 gpio_bank_saved[bank].reserved =
689 reserved_gpio_map[bank];
694 if ((mask & 1) && (wakeup_flags_map[gpio] !=
696 reserved_gpio_map[gpio_bank(gpio)] |=
698 bfin_gpio_wakeup_type(gpio,
699 wakeup_flags_map[gpio]);
700 set_gpio_data(gpio, 0); /*Clear*/
706 bfin_internal_set_wake(sic_iwr_irqs[bank], 1);
707 gpio_bankb[bank]->maskb_set = wakeup_map[gpio_bank(i)];
711 AWA_DUMMY_READ(maskb_set);
716 void bfin_pm_standby_restore(void)
720 for (i = 0; i < MAX_BLACKFIN_GPIOS; i += GPIO_BANKSIZE) {
721 mask = wakeup_map[gpio_bank(i)];
725 #if defined(BF527_FAMILY) || defined(BF537_FAMILY) || defined(BF518_FAMILY)
726 *port_fer[bank] = gpio_bank_saved[bank].fer;
728 gpio_bankb[bank]->inen = gpio_bank_saved[bank].inen;
729 gpio_bankb[bank]->dir = gpio_bank_saved[bank].dir;
730 gpio_bankb[bank]->polar = gpio_bank_saved[bank].polar;
731 gpio_bankb[bank]->edge = gpio_bank_saved[bank].edge;
732 gpio_bankb[bank]->both = gpio_bank_saved[bank].both;
734 reserved_gpio_map[bank] =
735 gpio_bank_saved[bank].reserved;
736 bfin_internal_set_wake(sic_iwr_irqs[bank], 0);
739 gpio_bankb[bank]->maskb = gpio_bank_saved[bank].maskb;
741 AWA_DUMMY_READ(maskb);
744 void bfin_gpio_pm_hibernate_suspend(void)
748 for (i = 0; i < MAX_BLACKFIN_GPIOS; i += GPIO_BANKSIZE) {
751 #if defined(BF527_FAMILY) || defined(BF537_FAMILY) || defined(BF518_FAMILY)
752 gpio_bank_saved[bank].fer = *port_fer[bank];
753 #if defined(BF527_FAMILY) || defined(BF518_FAMILY)
754 gpio_bank_saved[bank].mux = *port_mux[bank];
757 gpio_bank_saved[bank].mux = bfin_read_PORT_MUX();
760 gpio_bank_saved[bank].data = gpio_bankb[bank]->data;
761 gpio_bank_saved[bank].inen = gpio_bankb[bank]->inen;
762 gpio_bank_saved[bank].polar = gpio_bankb[bank]->polar;
763 gpio_bank_saved[bank].dir = gpio_bankb[bank]->dir;
764 gpio_bank_saved[bank].edge = gpio_bankb[bank]->edge;
765 gpio_bank_saved[bank].both = gpio_bankb[bank]->both;
766 gpio_bank_saved[bank].maska = gpio_bankb[bank]->maska;
769 AWA_DUMMY_READ(maska);
772 void bfin_gpio_pm_hibernate_restore(void)
776 for (i = 0; i < MAX_BLACKFIN_GPIOS; i += GPIO_BANKSIZE) {
779 #if defined(BF527_FAMILY) || defined(BF537_FAMILY) || defined(BF518_FAMILY)
780 #if defined(BF527_FAMILY) || defined(BF518_FAMILY)
781 *port_mux[bank] = gpio_bank_saved[bank].mux;
784 bfin_write_PORT_MUX(gpio_bank_saved[bank].mux);
786 *port_fer[bank] = gpio_bank_saved[bank].fer;
788 gpio_bankb[bank]->inen = gpio_bank_saved[bank].inen;
789 gpio_bankb[bank]->dir = gpio_bank_saved[bank].dir;
790 gpio_bankb[bank]->polar = gpio_bank_saved[bank].polar;
791 gpio_bankb[bank]->edge = gpio_bank_saved[bank].edge;
792 gpio_bankb[bank]->both = gpio_bank_saved[bank].both;
794 gpio_bankb[bank]->data_set = gpio_bank_saved[bank].data
795 | gpio_bank_saved[bank].dir;
797 gpio_bankb[bank]->maska = gpio_bank_saved[bank].maska;
799 AWA_DUMMY_READ(maska);
804 #else /* BF548_FAMILY */
807 u32 bfin_pm_standby_setup(void)
812 void bfin_pm_standby_restore(void)
817 void bfin_gpio_pm_hibernate_suspend(void)
821 for (i = 0; i < MAX_BLACKFIN_GPIOS; i += GPIO_BANKSIZE) {
824 gpio_bank_saved[bank].fer = gpio_array[bank]->port_fer;
825 gpio_bank_saved[bank].mux = gpio_array[bank]->port_mux;
826 gpio_bank_saved[bank].data = gpio_array[bank]->port_data;
827 gpio_bank_saved[bank].data = gpio_array[bank]->port_data;
828 gpio_bank_saved[bank].inen = gpio_array[bank]->port_inen;
829 gpio_bank_saved[bank].dir = gpio_array[bank]->port_dir_set;
833 void bfin_gpio_pm_hibernate_restore(void)
837 for (i = 0; i < MAX_BLACKFIN_GPIOS; i += GPIO_BANKSIZE) {
840 gpio_array[bank]->port_mux = gpio_bank_saved[bank].mux;
841 gpio_array[bank]->port_fer = gpio_bank_saved[bank].fer;
842 gpio_array[bank]->port_inen = gpio_bank_saved[bank].inen;
843 gpio_array[bank]->port_dir_set = gpio_bank_saved[bank].dir;
844 gpio_array[bank]->port_set = gpio_bank_saved[bank].data
845 | gpio_bank_saved[bank].dir;
850 unsigned short get_gpio_dir(unsigned gpio)
852 return (0x01 & (gpio_array[gpio_bank(gpio)]->port_dir_clear >> gpio_sub_n(gpio)));
854 EXPORT_SYMBOL(get_gpio_dir);
856 #endif /* BF548_FAMILY */
858 /***********************************************************
860 * FUNCTIONS: Blackfin Peripheral Resource Allocation
864 * per Peripheral Identifier
867 * DESCRIPTION: Blackfin Peripheral Resource Allocation and Setup API
870 *************************************************************
871 * MODIFICATION HISTORY :
872 **************************************************************/
875 int peripheral_request(unsigned short per, const char *label)
878 unsigned short ident = P_IDENT(per);
881 * Don't cares are pins with only one dedicated function
884 if (per & P_DONTCARE)
887 if (!(per & P_DEFINED))
890 if (check_gpio(ident) < 0)
893 local_irq_save(flags);
895 if (unlikely(reserved_gpio_map[gpio_bank(ident)] & gpio_bit(ident))) {
898 "%s: Peripheral %d is already reserved as GPIO by %s !\n",
899 __func__, ident, get_label(ident));
900 local_irq_restore(flags);
904 if (unlikely(reserved_peri_map[gpio_bank(ident)] & gpio_bit(ident))) {
906 u16 funct = get_portmux(ident);
909 * Pin functions like AMC address strobes my
910 * be requested and used by several drivers
913 if (!((per & P_MAYSHARE) && (funct == P_FUNCT2MUX(per)))) {
916 * Allow that the identical pin function can
917 * be requested from the same driver twice
920 if (cmp_label(ident, label) == 0)
925 "%s: Peripheral %d function %d is already reserved by %s !\n",
926 __func__, ident, P_FUNCT2MUX(per), get_label(ident));
927 local_irq_restore(flags);
933 reserved_peri_map[gpio_bank(ident)] |= gpio_bit(ident);
935 portmux_setup(ident, P_FUNCT2MUX(per));
936 port_setup(ident, PERIPHERAL_USAGE);
938 local_irq_restore(flags);
939 set_label(ident, label);
943 EXPORT_SYMBOL(peripheral_request);
946 int peripheral_request(unsigned short per, const char *label)
949 unsigned short ident = P_IDENT(per);
952 * Don't cares are pins with only one dedicated function
955 if (per & P_DONTCARE)
958 if (!(per & P_DEFINED))
961 local_irq_save(flags);
963 if (!check_gpio(ident)) {
965 if (unlikely(reserved_gpio_map[gpio_bank(ident)] & gpio_bit(ident))) {
968 "%s: Peripheral %d is already reserved as GPIO by %s !\n",
969 __func__, ident, get_label(ident));
970 local_irq_restore(flags);
976 if (unlikely(reserved_peri_map[gpio_bank(ident)] & gpio_bit(ident))) {
979 * Pin functions like AMC address strobes my
980 * be requested and used by several drivers
983 if (!(per & P_MAYSHARE)) {
986 * Allow that the identical pin function can
987 * be requested from the same driver twice
990 if (cmp_label(ident, label) == 0)
995 "%s: Peripheral %d function %d is already"
996 " reserved by %s !\n",
997 __func__, ident, P_FUNCT2MUX(per),
999 local_irq_restore(flags);
1006 portmux_setup(per, P_FUNCT2MUX(per));
1008 port_setup(ident, PERIPHERAL_USAGE);
1010 reserved_peri_map[gpio_bank(ident)] |= gpio_bit(ident);
1011 local_irq_restore(flags);
1012 set_label(ident, label);
1016 EXPORT_SYMBOL(peripheral_request);
1019 int peripheral_request_list(const unsigned short per[], const char *label)
1024 for (cnt = 0; per[cnt] != 0; cnt++) {
1026 ret = peripheral_request(per[cnt], label);
1029 for ( ; cnt > 0; cnt--)
1030 peripheral_free(per[cnt - 1]);
1038 EXPORT_SYMBOL(peripheral_request_list);
1040 void peripheral_free(unsigned short per)
1042 unsigned long flags;
1043 unsigned short ident = P_IDENT(per);
1045 if (per & P_DONTCARE)
1048 if (!(per & P_DEFINED))
1051 if (check_gpio(ident) < 0)
1054 local_irq_save(flags);
1056 if (unlikely(!(reserved_peri_map[gpio_bank(ident)] & gpio_bit(ident)))) {
1057 local_irq_restore(flags);
1061 if (!(per & P_MAYSHARE))
1062 port_setup(ident, GPIO_USAGE);
1064 reserved_peri_map[gpio_bank(ident)] &= ~gpio_bit(ident);
1066 set_label(ident, "free");
1068 local_irq_restore(flags);
1070 EXPORT_SYMBOL(peripheral_free);
1072 void peripheral_free_list(const unsigned short per[])
1075 for (cnt = 0; per[cnt] != 0; cnt++)
1076 peripheral_free(per[cnt]);
1078 EXPORT_SYMBOL(peripheral_free_list);
1080 /***********************************************************
1082 * FUNCTIONS: Blackfin GPIO Driver
1085 * gpio PIO Number between 0 and MAX_BLACKFIN_GPIOS
1088 * DESCRIPTION: Blackfin GPIO Driver API
1091 *************************************************************
1092 * MODIFICATION HISTORY :
1093 **************************************************************/
1095 int gpio_request(unsigned gpio, const char *label)
1097 unsigned long flags;
1099 if (check_gpio(gpio) < 0)
1102 local_irq_save(flags);
1105 * Allow that the identical GPIO can
1106 * be requested from the same driver twice
1107 * Do nothing and return -
1110 if (cmp_label(gpio, label) == 0) {
1111 local_irq_restore(flags);
1115 if (unlikely(reserved_gpio_map[gpio_bank(gpio)] & gpio_bit(gpio))) {
1117 printk(KERN_ERR "bfin-gpio: GPIO %d is already reserved by %s !\n",
1118 gpio, get_label(gpio));
1119 local_irq_restore(flags);
1122 if (unlikely(reserved_peri_map[gpio_bank(gpio)] & gpio_bit(gpio))) {
1125 "bfin-gpio: GPIO %d is already reserved as Peripheral by %s !\n",
1126 gpio, get_label(gpio));
1127 local_irq_restore(flags);
1131 reserved_gpio_map[gpio_bank(gpio)] |= gpio_bit(gpio);
1133 local_irq_restore(flags);
1135 port_setup(gpio, GPIO_USAGE);
1136 set_label(gpio, label);
1140 EXPORT_SYMBOL(gpio_request);
1142 void gpio_free(unsigned gpio)
1144 unsigned long flags;
1146 if (check_gpio(gpio) < 0)
1149 local_irq_save(flags);
1151 if (unlikely(!(reserved_gpio_map[gpio_bank(gpio)] & gpio_bit(gpio)))) {
1154 local_irq_restore(flags);
1158 reserved_gpio_map[gpio_bank(gpio)] &= ~gpio_bit(gpio);
1160 set_label(gpio, "free");
1162 local_irq_restore(flags);
1164 EXPORT_SYMBOL(gpio_free);
1168 int gpio_direction_input(unsigned gpio)
1170 unsigned long flags;
1172 if (!(reserved_gpio_map[gpio_bank(gpio)] & gpio_bit(gpio))) {
1177 local_irq_save(flags);
1178 gpio_array[gpio_bank(gpio)]->port_dir_clear = gpio_bit(gpio);
1179 gpio_array[gpio_bank(gpio)]->port_inen |= gpio_bit(gpio);
1180 local_irq_restore(flags);
1184 EXPORT_SYMBOL(gpio_direction_input);
1186 int gpio_direction_output(unsigned gpio, int value)
1188 unsigned long flags;
1190 if (!(reserved_gpio_map[gpio_bank(gpio)] & gpio_bit(gpio))) {
1195 local_irq_save(flags);
1196 gpio_array[gpio_bank(gpio)]->port_inen &= ~gpio_bit(gpio);
1197 gpio_set_value(gpio, value);
1198 gpio_array[gpio_bank(gpio)]->port_dir_set = gpio_bit(gpio);
1199 local_irq_restore(flags);
1203 EXPORT_SYMBOL(gpio_direction_output);
1205 void gpio_set_value(unsigned gpio, int arg)
1208 gpio_array[gpio_bank(gpio)]->port_set = gpio_bit(gpio);
1210 gpio_array[gpio_bank(gpio)]->port_clear = gpio_bit(gpio);
1212 EXPORT_SYMBOL(gpio_set_value);
1214 int gpio_get_value(unsigned gpio)
1216 return (1 & (gpio_array[gpio_bank(gpio)]->port_data >> gpio_sub_n(gpio)));
1218 EXPORT_SYMBOL(gpio_get_value);
1220 void bfin_gpio_irq_prepare(unsigned gpio)
1222 unsigned long flags;
1224 port_setup(gpio, GPIO_USAGE);
1226 local_irq_save(flags);
1227 gpio_array[gpio_bank(gpio)]->port_dir_clear = gpio_bit(gpio);
1228 gpio_array[gpio_bank(gpio)]->port_inen |= gpio_bit(gpio);
1229 local_irq_restore(flags);
1234 int gpio_get_value(unsigned gpio)
1236 unsigned long flags;
1239 if (unlikely(get_gpio_edge(gpio))) {
1240 local_irq_save(flags);
1241 set_gpio_edge(gpio, 0);
1242 ret = get_gpio_data(gpio);
1243 set_gpio_edge(gpio, 1);
1244 local_irq_restore(flags);
1248 return get_gpio_data(gpio);
1250 EXPORT_SYMBOL(gpio_get_value);
1253 int gpio_direction_input(unsigned gpio)
1255 unsigned long flags;
1257 if (!(reserved_gpio_map[gpio_bank(gpio)] & gpio_bit(gpio))) {
1262 local_irq_save(flags);
1263 gpio_bankb[gpio_bank(gpio)]->dir &= ~gpio_bit(gpio);
1264 gpio_bankb[gpio_bank(gpio)]->inen |= gpio_bit(gpio);
1265 AWA_DUMMY_READ(inen);
1266 local_irq_restore(flags);
1270 EXPORT_SYMBOL(gpio_direction_input);
1272 int gpio_direction_output(unsigned gpio, int value)
1274 unsigned long flags;
1276 if (!(reserved_gpio_map[gpio_bank(gpio)] & gpio_bit(gpio))) {
1281 local_irq_save(flags);
1282 gpio_bankb[gpio_bank(gpio)]->inen &= ~gpio_bit(gpio);
1285 gpio_bankb[gpio_bank(gpio)]->data_set = gpio_bit(gpio);
1287 gpio_bankb[gpio_bank(gpio)]->data_clear = gpio_bit(gpio);
1289 gpio_bankb[gpio_bank(gpio)]->dir |= gpio_bit(gpio);
1290 AWA_DUMMY_READ(dir);
1291 local_irq_restore(flags);
1295 EXPORT_SYMBOL(gpio_direction_output);
1297 /* If we are booting from SPI and our board lacks a strong enough pull up,
1298 * the core can reset and execute the bootrom faster than the resistor can
1299 * pull the signal logically high. To work around this (common) error in
1300 * board design, we explicitly set the pin back to GPIO mode, force /CS
1301 * high, and wait for the electrons to do their thing.
1303 * This function only makes sense to be called from reset code, but it
1304 * lives here as we need to force all the GPIO states w/out going through
1305 * BUG() checks and such.
1307 void bfin_gpio_reset_spi0_ssel1(void)
1309 u16 gpio = P_IDENT(P_SPI0_SSEL1);
1311 port_setup(gpio, GPIO_USAGE);
1312 gpio_bankb[gpio_bank(gpio)]->data_set = gpio_bit(gpio);
1313 AWA_DUMMY_READ(data_set);
1317 void bfin_gpio_irq_prepare(unsigned gpio)
1319 port_setup(gpio, GPIO_USAGE);
1322 #endif /*BF548_FAMILY */
1324 #if defined(CONFIG_PROC_FS)
1325 static int gpio_proc_read(char *buf, char **start, off_t offset,
1326 int len, int *unused_i, void *unused_v)
1330 for (c = 0; c < MAX_RESOURCES; c++) {
1331 if (!check_gpio(c) && (reserved_gpio_map[gpio_bank(c)] & gpio_bit(c)))
1332 len = sprintf(buf, "GPIO_%d: %s \t\tGPIO %s\n", c,
1333 get_label(c), get_gpio_dir(c) ? "OUTPUT" : "INPUT");
1334 else if (reserved_peri_map[gpio_bank(c)] & gpio_bit(c))
1335 len = sprintf(buf, "GPIO_%d: %s \t\tPeripheral\n", c, get_label(c));
1344 static __init int gpio_register_proc(void)
1346 struct proc_dir_entry *proc_gpio;
1348 proc_gpio = create_proc_entry("gpio", S_IRUGO, NULL);
1350 proc_gpio->read_proc = gpio_proc_read;
1351 return proc_gpio != NULL;
1353 __initcall(gpio_register_proc);