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 #if defined(BF548_FAMILY)
220 inline int check_gpio(unsigned gpio)
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
225 || gpio >= MAX_BLACKFIN_GPIOS)
230 inline int check_gpio(unsigned gpio)
232 if (gpio >= MAX_BLACKFIN_GPIOS)
238 static void gpio_error(unsigned gpio)
240 printk(KERN_ERR "bfin-gpio: GPIO %d wasn't requested!\n", gpio);
243 static void set_label(unsigned short ident, const char *label)
246 strncpy(str_ident[ident].name, label,
247 RESOURCE_LABEL_SIZE);
248 str_ident[ident].name[RESOURCE_LABEL_SIZE - 1] = 0;
252 static char *get_label(unsigned short ident)
254 return (*str_ident[ident].name ? str_ident[ident].name : "UNKNOWN");
257 static int cmp_label(unsigned short ident, const char *label)
261 printk(KERN_ERR "Please provide none-null label\n");
265 return strncmp(str_ident[ident].name,
266 label, strlen(label));
271 #if defined(BF527_FAMILY) || defined(BF537_FAMILY) || defined(BF518_FAMILY)
272 static void port_setup(unsigned gpio, unsigned short usage)
274 if (!check_gpio(gpio)) {
275 if (usage == GPIO_USAGE)
276 *port_fer[gpio_bank(gpio)] &= ~gpio_bit(gpio);
278 *port_fer[gpio_bank(gpio)] |= gpio_bit(gpio);
282 #elif defined(BF548_FAMILY)
283 static void port_setup(unsigned gpio, unsigned short usage)
285 if (usage == GPIO_USAGE)
286 gpio_array[gpio_bank(gpio)]->port_fer &= ~gpio_bit(gpio);
288 gpio_array[gpio_bank(gpio)]->port_fer |= gpio_bit(gpio);
292 # define port_setup(...) do { } while (0)
298 unsigned short offset;
300 {.res = P_PPI0_D13, .offset = 11},
301 {.res = P_PPI0_D14, .offset = 11},
302 {.res = P_PPI0_D15, .offset = 11},
303 {.res = P_SPORT1_TFS, .offset = 11},
304 {.res = P_SPORT1_TSCLK, .offset = 11},
305 {.res = P_SPORT1_DTPRI, .offset = 11},
306 {.res = P_PPI0_D10, .offset = 10},
307 {.res = P_PPI0_D11, .offset = 10},
308 {.res = P_PPI0_D12, .offset = 10},
309 {.res = P_SPORT1_RSCLK, .offset = 10},
310 {.res = P_SPORT1_RFS, .offset = 10},
311 {.res = P_SPORT1_DRPRI, .offset = 10},
312 {.res = P_PPI0_D8, .offset = 9},
313 {.res = P_PPI0_D9, .offset = 9},
314 {.res = P_SPORT1_DRSEC, .offset = 9},
315 {.res = P_SPORT1_DTSEC, .offset = 9},
316 {.res = P_TMR2, .offset = 8},
317 {.res = P_PPI0_FS3, .offset = 8},
318 {.res = P_TMR3, .offset = 7},
319 {.res = P_SPI0_SSEL4, .offset = 7},
320 {.res = P_TMR4, .offset = 6},
321 {.res = P_SPI0_SSEL5, .offset = 6},
322 {.res = P_TMR5, .offset = 5},
323 {.res = P_SPI0_SSEL6, .offset = 5},
324 {.res = P_UART1_RX, .offset = 4},
325 {.res = P_UART1_TX, .offset = 4},
326 {.res = P_TMR6, .offset = 4},
327 {.res = P_TMR7, .offset = 4},
328 {.res = P_UART0_RX, .offset = 3},
329 {.res = P_UART0_TX, .offset = 3},
330 {.res = P_DMAR0, .offset = 3},
331 {.res = P_DMAR1, .offset = 3},
332 {.res = P_SPORT0_DTSEC, .offset = 1},
333 {.res = P_SPORT0_DRSEC, .offset = 1},
334 {.res = P_CAN0_RX, .offset = 1},
335 {.res = P_CAN0_TX, .offset = 1},
336 {.res = P_SPI0_SSEL7, .offset = 1},
337 {.res = P_SPORT0_TFS, .offset = 0},
338 {.res = P_SPORT0_DTPRI, .offset = 0},
339 {.res = P_SPI0_SSEL2, .offset = 0},
340 {.res = P_SPI0_SSEL3, .offset = 0},
343 static void portmux_setup(unsigned short per, unsigned short function)
345 u16 y, offset, muxreg;
347 for (y = 0; y < ARRAY_SIZE(port_mux_lut); y++) {
348 if (port_mux_lut[y].res == per) {
350 /* SET PORTMUX REG */
352 offset = port_mux_lut[y].offset;
353 muxreg = bfin_read_PORT_MUX();
356 muxreg &= ~(1 << offset);
360 muxreg |= (function << offset);
361 bfin_write_PORT_MUX(muxreg);
365 #elif defined(BF548_FAMILY)
366 inline void portmux_setup(unsigned short portno, unsigned short function)
370 pmux = gpio_array[gpio_bank(portno)]->port_mux;
372 pmux &= ~(0x3 << (2 * gpio_sub_n(portno)));
373 pmux |= (function & 0x3) << (2 * gpio_sub_n(portno));
375 gpio_array[gpio_bank(portno)]->port_mux = pmux;
378 inline u16 get_portmux(unsigned short portno)
382 pmux = gpio_array[gpio_bank(portno)]->port_mux;
384 return (pmux >> (2 * gpio_sub_n(portno)) & 0x3);
386 #elif defined(BF527_FAMILY) || defined(BF518_FAMILY)
387 inline void portmux_setup(unsigned short portno, unsigned short function)
389 u16 pmux, ident = P_IDENT(portno);
390 u8 offset = pmux_offset[gpio_bank(ident)][gpio_sub_n(ident)];
392 pmux = *port_mux[gpio_bank(ident)];
393 pmux &= ~(3 << offset);
394 pmux |= (function & 3) << offset;
395 *port_mux[gpio_bank(ident)] = pmux;
399 # define portmux_setup(...) do { } while (0)
402 static int __init bfin_gpio_init(void)
404 printk(KERN_INFO "Blackfin GPIO Controller\n");
408 arch_initcall(bfin_gpio_init);
412 /***********************************************************
414 * FUNCTIONS: Blackfin General Purpose Ports Access Functions
417 * gpio - GPIO Number between 0 and MAX_BLACKFIN_GPIOS
420 * DESCRIPTION: These functions abstract direct register access
421 * to Blackfin processor General Purpose
424 * CAUTION: These functions do not belong to the GPIO Driver API
425 *************************************************************
426 * MODIFICATION HISTORY :
427 **************************************************************/
429 /* Set a specific bit */
431 #define SET_GPIO(name) \
432 void set_gpio_ ## name(unsigned gpio, unsigned short arg) \
434 unsigned long flags; \
435 local_irq_save(flags); \
437 gpio_bankb[gpio_bank(gpio)]->name |= gpio_bit(gpio); \
439 gpio_bankb[gpio_bank(gpio)]->name &= ~gpio_bit(gpio); \
440 AWA_DUMMY_READ(name); \
441 local_irq_restore(flags); \
443 EXPORT_SYMBOL(set_gpio_ ## name);
452 #if ANOMALY_05000311 || ANOMALY_05000323
453 #define SET_GPIO_SC(name) \
454 void set_gpio_ ## name(unsigned gpio, unsigned short arg) \
456 unsigned long flags; \
457 local_irq_save(flags); \
459 gpio_bankb[gpio_bank(gpio)]->name ## _set = gpio_bit(gpio); \
461 gpio_bankb[gpio_bank(gpio)]->name ## _clear = gpio_bit(gpio); \
462 AWA_DUMMY_READ(name); \
463 local_irq_restore(flags); \
465 EXPORT_SYMBOL(set_gpio_ ## name);
467 #define SET_GPIO_SC(name) \
468 void set_gpio_ ## name(unsigned gpio, unsigned short arg) \
471 gpio_bankb[gpio_bank(gpio)]->name ## _set = gpio_bit(gpio); \
473 gpio_bankb[gpio_bank(gpio)]->name ## _clear = gpio_bit(gpio); \
475 EXPORT_SYMBOL(set_gpio_ ## name);
482 #if ANOMALY_05000311 || ANOMALY_05000323
483 void set_gpio_toggle(unsigned gpio)
486 local_irq_save(flags);
487 gpio_bankb[gpio_bank(gpio)]->toggle = gpio_bit(gpio);
488 AWA_DUMMY_READ(toggle);
489 local_irq_restore(flags);
492 void set_gpio_toggle(unsigned gpio)
494 gpio_bankb[gpio_bank(gpio)]->toggle = gpio_bit(gpio);
497 EXPORT_SYMBOL(set_gpio_toggle);
500 /*Set current PORT date (16-bit word)*/
502 #if ANOMALY_05000311 || ANOMALY_05000323
503 #define SET_GPIO_P(name) \
504 void set_gpiop_ ## name(unsigned gpio, unsigned short arg) \
506 unsigned long flags; \
507 local_irq_save(flags); \
508 gpio_bankb[gpio_bank(gpio)]->name = arg; \
509 AWA_DUMMY_READ(name); \
510 local_irq_restore(flags); \
512 EXPORT_SYMBOL(set_gpiop_ ## name);
514 #define SET_GPIO_P(name) \
515 void set_gpiop_ ## name(unsigned gpio, unsigned short arg) \
517 gpio_bankb[gpio_bank(gpio)]->name = arg; \
519 EXPORT_SYMBOL(set_gpiop_ ## name);
531 /* Get a specific bit */
532 #if ANOMALY_05000311 || ANOMALY_05000323
533 #define GET_GPIO(name) \
534 unsigned short get_gpio_ ## name(unsigned gpio) \
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); \
544 EXPORT_SYMBOL(get_gpio_ ## name);
546 #define GET_GPIO(name) \
547 unsigned short get_gpio_ ## name(unsigned gpio) \
549 return (0x01 & (gpio_bankb[gpio_bank(gpio)]->name >> gpio_sub_n(gpio))); \
551 EXPORT_SYMBOL(get_gpio_ ## name);
563 /*Get current PORT date (16-bit word)*/
565 #if ANOMALY_05000311 || ANOMALY_05000323
566 #define GET_GPIO_P(name) \
567 unsigned short get_gpiop_ ## name(unsigned gpio) \
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); \
577 EXPORT_SYMBOL(get_gpiop_ ## name);
579 #define GET_GPIO_P(name) \
580 unsigned short get_gpiop_ ## name(unsigned gpio) \
582 return (gpio_bankb[gpio_bank(gpio)]->name);\
584 EXPORT_SYMBOL(get_gpiop_ ## name);
598 /***********************************************************
600 * FUNCTIONS: Blackfin PM Setup API
603 * gpio - GPIO Number between 0 and MAX_BLACKFIN_GPIOS
611 * DESCRIPTION: Blackfin PM Driver API
614 *************************************************************
615 * MODIFICATION HISTORY :
616 **************************************************************/
617 int gpio_pm_wakeup_request(unsigned gpio, unsigned char type)
621 if ((check_gpio(gpio) < 0) || !type)
624 local_irq_save(flags);
625 wakeup_map[gpio_bank(gpio)] |= gpio_bit(gpio);
626 wakeup_flags_map[gpio] = type;
627 local_irq_restore(flags);
631 EXPORT_SYMBOL(gpio_pm_wakeup_request);
633 void gpio_pm_wakeup_free(unsigned gpio)
637 if (check_gpio(gpio) < 0)
640 local_irq_save(flags);
642 wakeup_map[gpio_bank(gpio)] &= ~gpio_bit(gpio);
644 local_irq_restore(flags);
646 EXPORT_SYMBOL(gpio_pm_wakeup_free);
648 static int bfin_gpio_wakeup_type(unsigned gpio, unsigned char type)
650 port_setup(gpio, GPIO_USAGE);
651 set_gpio_dir(gpio, 0);
652 set_gpio_inen(gpio, 1);
654 if (type & (PM_WAKE_RISING | PM_WAKE_FALLING))
655 set_gpio_edge(gpio, 1);
657 set_gpio_edge(gpio, 0);
659 if ((type & (PM_WAKE_BOTH_EDGES)) == (PM_WAKE_BOTH_EDGES))
660 set_gpio_both(gpio, 1);
662 set_gpio_both(gpio, 0);
664 if ((type & (PM_WAKE_FALLING | PM_WAKE_LOW)))
665 set_gpio_polar(gpio, 1);
667 set_gpio_polar(gpio, 0);
674 u32 bfin_pm_standby_setup(void)
676 u16 bank, mask, i, gpio;
678 for (i = 0; i < MAX_BLACKFIN_GPIOS; i += GPIO_BANKSIZE) {
679 mask = wakeup_map[gpio_bank(i)];
682 gpio_bank_saved[bank].maskb = gpio_bankb[bank]->maskb;
683 gpio_bankb[bank]->maskb = 0;
686 #if defined(BF527_FAMILY) || defined(BF537_FAMILY) || defined(BF518_FAMILY)
687 gpio_bank_saved[bank].fer = *port_fer[bank];
689 gpio_bank_saved[bank].inen = gpio_bankb[bank]->inen;
690 gpio_bank_saved[bank].polar = gpio_bankb[bank]->polar;
691 gpio_bank_saved[bank].dir = gpio_bankb[bank]->dir;
692 gpio_bank_saved[bank].edge = gpio_bankb[bank]->edge;
693 gpio_bank_saved[bank].both = gpio_bankb[bank]->both;
694 gpio_bank_saved[bank].reserved =
695 reserved_gpio_map[bank];
700 if ((mask & 1) && (wakeup_flags_map[gpio] !=
702 reserved_gpio_map[gpio_bank(gpio)] |=
704 bfin_gpio_wakeup_type(gpio,
705 wakeup_flags_map[gpio]);
706 set_gpio_data(gpio, 0); /*Clear*/
712 bfin_internal_set_wake(sic_iwr_irqs[bank], 1);
713 gpio_bankb[bank]->maskb_set = wakeup_map[gpio_bank(i)];
717 AWA_DUMMY_READ(maskb_set);
722 void bfin_pm_standby_restore(void)
726 for (i = 0; i < MAX_BLACKFIN_GPIOS; i += GPIO_BANKSIZE) {
727 mask = wakeup_map[gpio_bank(i)];
731 #if defined(BF527_FAMILY) || defined(BF537_FAMILY) || defined(BF518_FAMILY)
732 *port_fer[bank] = gpio_bank_saved[bank].fer;
734 gpio_bankb[bank]->inen = gpio_bank_saved[bank].inen;
735 gpio_bankb[bank]->dir = gpio_bank_saved[bank].dir;
736 gpio_bankb[bank]->polar = gpio_bank_saved[bank].polar;
737 gpio_bankb[bank]->edge = gpio_bank_saved[bank].edge;
738 gpio_bankb[bank]->both = gpio_bank_saved[bank].both;
740 reserved_gpio_map[bank] =
741 gpio_bank_saved[bank].reserved;
742 bfin_internal_set_wake(sic_iwr_irqs[bank], 0);
745 gpio_bankb[bank]->maskb = gpio_bank_saved[bank].maskb;
747 AWA_DUMMY_READ(maskb);
750 void bfin_gpio_pm_hibernate_suspend(void)
754 for (i = 0; i < MAX_BLACKFIN_GPIOS; i += GPIO_BANKSIZE) {
757 #if defined(BF527_FAMILY) || defined(BF537_FAMILY) || defined(BF518_FAMILY)
758 gpio_bank_saved[bank].fer = *port_fer[bank];
759 #if defined(BF527_FAMILY) || defined(BF518_FAMILY)
760 gpio_bank_saved[bank].mux = *port_mux[bank];
763 gpio_bank_saved[bank].mux = bfin_read_PORT_MUX();
766 gpio_bank_saved[bank].data = gpio_bankb[bank]->data;
767 gpio_bank_saved[bank].inen = gpio_bankb[bank]->inen;
768 gpio_bank_saved[bank].polar = gpio_bankb[bank]->polar;
769 gpio_bank_saved[bank].dir = gpio_bankb[bank]->dir;
770 gpio_bank_saved[bank].edge = gpio_bankb[bank]->edge;
771 gpio_bank_saved[bank].both = gpio_bankb[bank]->both;
772 gpio_bank_saved[bank].maska = gpio_bankb[bank]->maska;
775 AWA_DUMMY_READ(maska);
778 void bfin_gpio_pm_hibernate_restore(void)
782 for (i = 0; i < MAX_BLACKFIN_GPIOS; i += GPIO_BANKSIZE) {
785 #if defined(BF527_FAMILY) || defined(BF537_FAMILY) || defined(BF518_FAMILY)
786 #if defined(BF527_FAMILY) || defined(BF518_FAMILY)
787 *port_mux[bank] = gpio_bank_saved[bank].mux;
790 bfin_write_PORT_MUX(gpio_bank_saved[bank].mux);
792 *port_fer[bank] = gpio_bank_saved[bank].fer;
794 gpio_bankb[bank]->inen = gpio_bank_saved[bank].inen;
795 gpio_bankb[bank]->dir = gpio_bank_saved[bank].dir;
796 gpio_bankb[bank]->polar = gpio_bank_saved[bank].polar;
797 gpio_bankb[bank]->edge = gpio_bank_saved[bank].edge;
798 gpio_bankb[bank]->both = gpio_bank_saved[bank].both;
800 gpio_bankb[bank]->data_set = gpio_bank_saved[bank].data
801 | gpio_bank_saved[bank].dir;
803 gpio_bankb[bank]->maska = gpio_bank_saved[bank].maska;
805 AWA_DUMMY_READ(maska);
810 #else /* BF548_FAMILY */
813 u32 bfin_pm_standby_setup(void)
818 void bfin_pm_standby_restore(void)
823 void bfin_gpio_pm_hibernate_suspend(void)
827 for (i = 0; i < MAX_BLACKFIN_GPIOS; i += GPIO_BANKSIZE) {
830 gpio_bank_saved[bank].fer = gpio_array[bank]->port_fer;
831 gpio_bank_saved[bank].mux = gpio_array[bank]->port_mux;
832 gpio_bank_saved[bank].data = gpio_array[bank]->port_data;
833 gpio_bank_saved[bank].data = gpio_array[bank]->port_data;
834 gpio_bank_saved[bank].inen = gpio_array[bank]->port_inen;
835 gpio_bank_saved[bank].dir = gpio_array[bank]->port_dir_set;
839 void bfin_gpio_pm_hibernate_restore(void)
843 for (i = 0; i < MAX_BLACKFIN_GPIOS; i += GPIO_BANKSIZE) {
846 gpio_array[bank]->port_mux = gpio_bank_saved[bank].mux;
847 gpio_array[bank]->port_fer = gpio_bank_saved[bank].fer;
848 gpio_array[bank]->port_inen = gpio_bank_saved[bank].inen;
849 gpio_array[bank]->port_dir_set = gpio_bank_saved[bank].dir;
850 gpio_array[bank]->port_set = gpio_bank_saved[bank].data
851 | gpio_bank_saved[bank].dir;
856 unsigned short get_gpio_dir(unsigned gpio)
858 return (0x01 & (gpio_array[gpio_bank(gpio)]->port_dir_clear >> gpio_sub_n(gpio)));
860 EXPORT_SYMBOL(get_gpio_dir);
862 #endif /* BF548_FAMILY */
864 /***********************************************************
866 * FUNCTIONS: Blackfin Peripheral Resource Allocation
870 * per Peripheral Identifier
873 * DESCRIPTION: Blackfin Peripheral Resource Allocation and Setup API
876 *************************************************************
877 * MODIFICATION HISTORY :
878 **************************************************************/
881 int peripheral_request(unsigned short per, const char *label)
884 unsigned short ident = P_IDENT(per);
887 * Don't cares are pins with only one dedicated function
890 if (per & P_DONTCARE)
893 if (!(per & P_DEFINED))
896 if (check_gpio(ident) < 0)
899 local_irq_save(flags);
901 if (unlikely(reserved_gpio_map[gpio_bank(ident)] & gpio_bit(ident))) {
904 "%s: Peripheral %d is already reserved as GPIO by %s !\n",
905 __func__, ident, get_label(ident));
906 local_irq_restore(flags);
910 if (unlikely(reserved_peri_map[gpio_bank(ident)] & gpio_bit(ident))) {
912 u16 funct = get_portmux(ident);
915 * Pin functions like AMC address strobes my
916 * be requested and used by several drivers
919 if (!((per & P_MAYSHARE) && (funct == P_FUNCT2MUX(per)))) {
922 * Allow that the identical pin function can
923 * be requested from the same driver twice
926 if (cmp_label(ident, label) == 0)
931 "%s: Peripheral %d function %d is already reserved by %s !\n",
932 __func__, ident, P_FUNCT2MUX(per), get_label(ident));
933 local_irq_restore(flags);
939 reserved_peri_map[gpio_bank(ident)] |= gpio_bit(ident);
941 portmux_setup(ident, P_FUNCT2MUX(per));
942 port_setup(ident, PERIPHERAL_USAGE);
944 local_irq_restore(flags);
945 set_label(ident, label);
949 EXPORT_SYMBOL(peripheral_request);
952 int peripheral_request(unsigned short per, const char *label)
955 unsigned short ident = P_IDENT(per);
958 * Don't cares are pins with only one dedicated function
961 if (per & P_DONTCARE)
964 if (!(per & P_DEFINED))
967 local_irq_save(flags);
969 if (!check_gpio(ident)) {
971 if (unlikely(reserved_gpio_map[gpio_bank(ident)] & gpio_bit(ident))) {
974 "%s: Peripheral %d is already reserved as GPIO by %s !\n",
975 __func__, ident, get_label(ident));
976 local_irq_restore(flags);
982 if (unlikely(reserved_peri_map[gpio_bank(ident)] & gpio_bit(ident))) {
985 * Pin functions like AMC address strobes my
986 * be requested and used by several drivers
989 if (!(per & P_MAYSHARE)) {
992 * Allow that the identical pin function can
993 * be requested from the same driver twice
996 if (cmp_label(ident, label) == 0)
1001 "%s: Peripheral %d function %d is already"
1002 " reserved by %s !\n",
1003 __func__, ident, P_FUNCT2MUX(per),
1005 local_irq_restore(flags);
1012 portmux_setup(per, P_FUNCT2MUX(per));
1014 port_setup(ident, PERIPHERAL_USAGE);
1016 reserved_peri_map[gpio_bank(ident)] |= gpio_bit(ident);
1017 local_irq_restore(flags);
1018 set_label(ident, label);
1022 EXPORT_SYMBOL(peripheral_request);
1025 int peripheral_request_list(const unsigned short per[], const char *label)
1030 for (cnt = 0; per[cnt] != 0; cnt++) {
1032 ret = peripheral_request(per[cnt], label);
1035 for ( ; cnt > 0; cnt--)
1036 peripheral_free(per[cnt - 1]);
1044 EXPORT_SYMBOL(peripheral_request_list);
1046 void peripheral_free(unsigned short per)
1048 unsigned long flags;
1049 unsigned short ident = P_IDENT(per);
1051 if (per & P_DONTCARE)
1054 if (!(per & P_DEFINED))
1057 if (check_gpio(ident) < 0)
1060 local_irq_save(flags);
1062 if (unlikely(!(reserved_peri_map[gpio_bank(ident)] & gpio_bit(ident)))) {
1063 local_irq_restore(flags);
1067 if (!(per & P_MAYSHARE))
1068 port_setup(ident, GPIO_USAGE);
1070 reserved_peri_map[gpio_bank(ident)] &= ~gpio_bit(ident);
1072 set_label(ident, "free");
1074 local_irq_restore(flags);
1076 EXPORT_SYMBOL(peripheral_free);
1078 void peripheral_free_list(const unsigned short per[])
1081 for (cnt = 0; per[cnt] != 0; cnt++)
1082 peripheral_free(per[cnt]);
1084 EXPORT_SYMBOL(peripheral_free_list);
1086 /***********************************************************
1088 * FUNCTIONS: Blackfin GPIO Driver
1091 * gpio PIO Number between 0 and MAX_BLACKFIN_GPIOS
1094 * DESCRIPTION: Blackfin GPIO Driver API
1097 *************************************************************
1098 * MODIFICATION HISTORY :
1099 **************************************************************/
1101 int gpio_request(unsigned gpio, const char *label)
1103 unsigned long flags;
1105 if (check_gpio(gpio) < 0)
1108 local_irq_save(flags);
1111 * Allow that the identical GPIO can
1112 * be requested from the same driver twice
1113 * Do nothing and return -
1116 if (cmp_label(gpio, label) == 0) {
1117 local_irq_restore(flags);
1121 if (unlikely(reserved_gpio_map[gpio_bank(gpio)] & gpio_bit(gpio))) {
1123 printk(KERN_ERR "bfin-gpio: GPIO %d is already reserved by %s !\n",
1124 gpio, get_label(gpio));
1125 local_irq_restore(flags);
1128 if (unlikely(reserved_peri_map[gpio_bank(gpio)] & gpio_bit(gpio))) {
1131 "bfin-gpio: GPIO %d is already reserved as Peripheral by %s !\n",
1132 gpio, get_label(gpio));
1133 local_irq_restore(flags);
1137 reserved_gpio_map[gpio_bank(gpio)] |= gpio_bit(gpio);
1139 local_irq_restore(flags);
1141 port_setup(gpio, GPIO_USAGE);
1142 set_label(gpio, label);
1146 EXPORT_SYMBOL(gpio_request);
1148 void gpio_free(unsigned gpio)
1150 unsigned long flags;
1152 if (check_gpio(gpio) < 0)
1155 local_irq_save(flags);
1157 if (unlikely(!(reserved_gpio_map[gpio_bank(gpio)] & gpio_bit(gpio)))) {
1160 local_irq_restore(flags);
1164 reserved_gpio_map[gpio_bank(gpio)] &= ~gpio_bit(gpio);
1166 set_label(gpio, "free");
1168 local_irq_restore(flags);
1170 EXPORT_SYMBOL(gpio_free);
1174 int gpio_direction_input(unsigned gpio)
1176 unsigned long flags;
1178 if (!(reserved_gpio_map[gpio_bank(gpio)] & gpio_bit(gpio))) {
1183 local_irq_save(flags);
1184 gpio_array[gpio_bank(gpio)]->port_dir_clear = gpio_bit(gpio);
1185 gpio_array[gpio_bank(gpio)]->port_inen |= gpio_bit(gpio);
1186 local_irq_restore(flags);
1190 EXPORT_SYMBOL(gpio_direction_input);
1192 int gpio_direction_output(unsigned gpio, int value)
1194 unsigned long flags;
1196 if (!(reserved_gpio_map[gpio_bank(gpio)] & gpio_bit(gpio))) {
1201 local_irq_save(flags);
1202 gpio_array[gpio_bank(gpio)]->port_inen &= ~gpio_bit(gpio);
1203 gpio_set_value(gpio, value);
1204 gpio_array[gpio_bank(gpio)]->port_dir_set = gpio_bit(gpio);
1205 local_irq_restore(flags);
1209 EXPORT_SYMBOL(gpio_direction_output);
1211 void gpio_set_value(unsigned gpio, int arg)
1214 gpio_array[gpio_bank(gpio)]->port_set = gpio_bit(gpio);
1216 gpio_array[gpio_bank(gpio)]->port_clear = gpio_bit(gpio);
1218 EXPORT_SYMBOL(gpio_set_value);
1220 int gpio_get_value(unsigned gpio)
1222 return (1 & (gpio_array[gpio_bank(gpio)]->port_data >> gpio_sub_n(gpio)));
1224 EXPORT_SYMBOL(gpio_get_value);
1226 void bfin_gpio_irq_prepare(unsigned gpio)
1228 unsigned long flags;
1230 port_setup(gpio, GPIO_USAGE);
1232 local_irq_save(flags);
1233 gpio_array[gpio_bank(gpio)]->port_dir_clear = gpio_bit(gpio);
1234 gpio_array[gpio_bank(gpio)]->port_inen |= gpio_bit(gpio);
1235 local_irq_restore(flags);
1240 int gpio_get_value(unsigned gpio)
1242 unsigned long flags;
1245 if (unlikely(get_gpio_edge(gpio))) {
1246 local_irq_save(flags);
1247 set_gpio_edge(gpio, 0);
1248 ret = get_gpio_data(gpio);
1249 set_gpio_edge(gpio, 1);
1250 local_irq_restore(flags);
1254 return get_gpio_data(gpio);
1256 EXPORT_SYMBOL(gpio_get_value);
1259 int gpio_direction_input(unsigned gpio)
1261 unsigned long flags;
1263 if (!(reserved_gpio_map[gpio_bank(gpio)] & gpio_bit(gpio))) {
1268 local_irq_save(flags);
1269 gpio_bankb[gpio_bank(gpio)]->dir &= ~gpio_bit(gpio);
1270 gpio_bankb[gpio_bank(gpio)]->inen |= gpio_bit(gpio);
1271 AWA_DUMMY_READ(inen);
1272 local_irq_restore(flags);
1276 EXPORT_SYMBOL(gpio_direction_input);
1278 int gpio_direction_output(unsigned gpio, int value)
1280 unsigned long flags;
1282 if (!(reserved_gpio_map[gpio_bank(gpio)] & gpio_bit(gpio))) {
1287 local_irq_save(flags);
1288 gpio_bankb[gpio_bank(gpio)]->inen &= ~gpio_bit(gpio);
1291 gpio_bankb[gpio_bank(gpio)]->data_set = gpio_bit(gpio);
1293 gpio_bankb[gpio_bank(gpio)]->data_clear = gpio_bit(gpio);
1295 gpio_bankb[gpio_bank(gpio)]->dir |= gpio_bit(gpio);
1296 AWA_DUMMY_READ(dir);
1297 local_irq_restore(flags);
1301 EXPORT_SYMBOL(gpio_direction_output);
1303 /* If we are booting from SPI and our board lacks a strong enough pull up,
1304 * the core can reset and execute the bootrom faster than the resistor can
1305 * pull the signal logically high. To work around this (common) error in
1306 * board design, we explicitly set the pin back to GPIO mode, force /CS
1307 * high, and wait for the electrons to do their thing.
1309 * This function only makes sense to be called from reset code, but it
1310 * lives here as we need to force all the GPIO states w/out going through
1311 * BUG() checks and such.
1313 void bfin_gpio_reset_spi0_ssel1(void)
1315 u16 gpio = P_IDENT(P_SPI0_SSEL1);
1317 port_setup(gpio, GPIO_USAGE);
1318 gpio_bankb[gpio_bank(gpio)]->data_set = gpio_bit(gpio);
1319 AWA_DUMMY_READ(data_set);
1323 void bfin_gpio_irq_prepare(unsigned gpio)
1325 port_setup(gpio, GPIO_USAGE);
1328 #endif /*BF548_FAMILY */
1330 #if defined(CONFIG_PROC_FS)
1331 static int gpio_proc_read(char *buf, char **start, off_t offset,
1332 int len, int *unused_i, void *unused_v)
1336 for (c = 0; c < MAX_RESOURCES; c++) {
1337 if (!check_gpio(c) && (reserved_gpio_map[gpio_bank(c)] & gpio_bit(c)))
1338 len = sprintf(buf, "GPIO_%d: %s \t\tGPIO %s\n", c,
1339 get_label(c), get_gpio_dir(c) ? "OUTPUT" : "INPUT");
1340 else if (reserved_peri_map[gpio_bank(c)] & gpio_bit(c))
1341 len = sprintf(buf, "GPIO_%d: %s \t\tPeripheral\n", c, get_label(c));
1350 static __init int gpio_register_proc(void)
1352 struct proc_dir_entry *proc_gpio;
1354 proc_gpio = create_proc_entry("gpio", S_IRUGO, NULL);
1356 proc_gpio->read_proc = gpio_proc_read;
1357 return proc_gpio != NULL;
1359 __initcall(gpio_register_proc);