2 * File: arch/blackfin/kernel/bfin_gpio.c
4 * Author: Michael Hennerich (hennerich@blackfin.uclinux.org)
7 * Description: GPIO Abstraction Layer
10 * Copyright 2007 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,
99 AWA_maska_clear = UART_SCR,
100 AWA_maska_set = UART_SCR,
101 AWA_maska_toggle = UART_SCR,
102 AWA_maskb = UART_GCTL,
103 AWA_maskb_clear = UART_GCTL,
104 AWA_maskb_set = UART_GCTL,
105 AWA_maskb_toggle = UART_GCTL,
106 AWA_dir = SPORT1_STAT,
107 AWA_polar = SPORT1_STAT,
108 AWA_edge = SPORT1_STAT,
109 AWA_both = SPORT1_STAT,
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)
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)
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,
144 static unsigned short *port_mux[gpio_bank(MAX_BLACKFIN_GPIOS)] = {
145 (unsigned short *) PORTF_MUX,
146 (unsigned short *) PORTG_MUX,
147 (unsigned short *) PORTH_MUX,
151 u8 pmux_offset[][16] =
152 {{ 0, 0, 0, 0, 0, 0, 0, 0, 2, 2, 4, 6, 8, 8, 10, 10 }, /* PORTF */
153 { 0, 0, 0, 0, 0, 2, 2, 4, 4, 6, 8, 10, 10, 10, 12, 12 }, /* PORTG */
154 { 0, 0, 0, 0, 0, 0, 0, 0, 2, 4, 4, 4, 4, 4, 4, 4 }, /* PORTH */
159 static struct gpio_port_t *gpio_bankb[gpio_bank(MAX_BLACKFIN_GPIOS)] = {
160 (struct gpio_port_t *) FIO0_FLAG_D,
161 (struct gpio_port_t *) FIO1_FLAG_D,
162 (struct gpio_port_t *) FIO2_FLAG_D,
167 static struct gpio_port_t *gpio_array[gpio_bank(MAX_BLACKFIN_GPIOS)] = {
168 (struct gpio_port_t *)PORTA_FER,
169 (struct gpio_port_t *)PORTB_FER,
170 (struct gpio_port_t *)PORTC_FER,
171 (struct gpio_port_t *)PORTD_FER,
172 (struct gpio_port_t *)PORTE_FER,
173 (struct gpio_port_t *)PORTF_FER,
174 (struct gpio_port_t *)PORTG_FER,
175 (struct gpio_port_t *)PORTH_FER,
176 (struct gpio_port_t *)PORTI_FER,
177 (struct gpio_port_t *)PORTJ_FER,
181 static unsigned short reserved_gpio_map[gpio_bank(MAX_BLACKFIN_GPIOS)];
182 static unsigned short reserved_peri_map[gpio_bank(MAX_RESOURCES)];
184 #define RESOURCE_LABEL_SIZE 16
186 static struct str_ident {
187 char name[RESOURCE_LABEL_SIZE];
188 } str_ident[MAX_RESOURCES];
191 static unsigned short wakeup_map[gpio_bank(MAX_BLACKFIN_GPIOS)];
192 static unsigned char wakeup_flags_map[MAX_BLACKFIN_GPIOS];
193 static struct gpio_port_s gpio_bank_saved[gpio_bank(MAX_BLACKFIN_GPIOS)];
196 static unsigned int sic_iwr_irqs[gpio_bank(MAX_BLACKFIN_GPIOS)] = {IRQ_PROG_INTB};
200 static unsigned int sic_iwr_irqs[gpio_bank(MAX_BLACKFIN_GPIOS)] = {IRQ_PROG_INTB, IRQ_PORTG_INTB, IRQ_MAC_TX};
204 static unsigned int sic_iwr_irqs[gpio_bank(MAX_BLACKFIN_GPIOS)] = {IRQ_PORTF_INTB, IRQ_PORTG_INTB, IRQ_PORTH_INTB};
208 static unsigned int sic_iwr_irqs[gpio_bank(MAX_BLACKFIN_GPIOS)] = {IRQ_PROG0_INTB, IRQ_PROG1_INTB, IRQ_PROG2_INTB};
211 #endif /* CONFIG_PM */
213 #if defined(BF548_FAMILY)
214 inline int check_gpio(unsigned short gpio)
216 if (gpio == GPIO_PB15 || gpio == GPIO_PC14 || gpio == GPIO_PC15
217 || gpio == GPIO_PH14 || gpio == GPIO_PH15
218 || gpio == GPIO_PJ14 || gpio == GPIO_PJ15
219 || gpio > MAX_BLACKFIN_GPIOS)
224 inline int check_gpio(unsigned short gpio)
226 if (gpio >= MAX_BLACKFIN_GPIOS)
232 static void set_label(unsigned short ident, const char *label)
235 if (label && str_ident) {
236 strncpy(str_ident[ident].name, label,
237 RESOURCE_LABEL_SIZE);
238 str_ident[ident].name[RESOURCE_LABEL_SIZE - 1] = 0;
242 static char *get_label(unsigned short ident)
247 return (*str_ident[ident].name ? str_ident[ident].name : "UNKNOWN");
250 static int cmp_label(unsigned short ident, const char *label)
254 printk(KERN_ERR "Please provide none-null label\n");
257 if (label && str_ident)
258 return strncmp(str_ident[ident].name,
259 label, strlen(label));
264 #if defined(BF527_FAMILY) || defined(BF537_FAMILY)
265 static void port_setup(unsigned short gpio, unsigned short usage)
267 if (!check_gpio(gpio)) {
268 if (usage == GPIO_USAGE)
269 *port_fer[gpio_bank(gpio)] &= ~gpio_bit(gpio);
271 *port_fer[gpio_bank(gpio)] |= gpio_bit(gpio);
275 #elif defined(BF548_FAMILY)
276 static void port_setup(unsigned short gpio, unsigned short usage)
278 if (usage == GPIO_USAGE)
279 gpio_array[gpio_bank(gpio)]->port_fer &= ~gpio_bit(gpio);
281 gpio_array[gpio_bank(gpio)]->port_fer |= gpio_bit(gpio);
285 # define port_setup(...) do { } while (0)
291 unsigned short offset;
293 {.res = P_PPI0_D13, .offset = 11},
294 {.res = P_PPI0_D14, .offset = 11},
295 {.res = P_PPI0_D15, .offset = 11},
296 {.res = P_SPORT1_TFS, .offset = 11},
297 {.res = P_SPORT1_TSCLK, .offset = 11},
298 {.res = P_SPORT1_DTPRI, .offset = 11},
299 {.res = P_PPI0_D10, .offset = 10},
300 {.res = P_PPI0_D11, .offset = 10},
301 {.res = P_PPI0_D12, .offset = 10},
302 {.res = P_SPORT1_RSCLK, .offset = 10},
303 {.res = P_SPORT1_RFS, .offset = 10},
304 {.res = P_SPORT1_DRPRI, .offset = 10},
305 {.res = P_PPI0_D8, .offset = 9},
306 {.res = P_PPI0_D9, .offset = 9},
307 {.res = P_SPORT1_DRSEC, .offset = 9},
308 {.res = P_SPORT1_DTSEC, .offset = 9},
309 {.res = P_TMR2, .offset = 8},
310 {.res = P_PPI0_FS3, .offset = 8},
311 {.res = P_TMR3, .offset = 7},
312 {.res = P_SPI0_SSEL4, .offset = 7},
313 {.res = P_TMR4, .offset = 6},
314 {.res = P_SPI0_SSEL5, .offset = 6},
315 {.res = P_TMR5, .offset = 5},
316 {.res = P_SPI0_SSEL6, .offset = 5},
317 {.res = P_UART1_RX, .offset = 4},
318 {.res = P_UART1_TX, .offset = 4},
319 {.res = P_TMR6, .offset = 4},
320 {.res = P_TMR7, .offset = 4},
321 {.res = P_UART0_RX, .offset = 3},
322 {.res = P_UART0_TX, .offset = 3},
323 {.res = P_DMAR0, .offset = 3},
324 {.res = P_DMAR1, .offset = 3},
325 {.res = P_SPORT0_DTSEC, .offset = 1},
326 {.res = P_SPORT0_DRSEC, .offset = 1},
327 {.res = P_CAN0_RX, .offset = 1},
328 {.res = P_CAN0_TX, .offset = 1},
329 {.res = P_SPI0_SSEL7, .offset = 1},
330 {.res = P_SPORT0_TFS, .offset = 0},
331 {.res = P_SPORT0_DTPRI, .offset = 0},
332 {.res = P_SPI0_SSEL2, .offset = 0},
333 {.res = P_SPI0_SSEL3, .offset = 0},
336 static void portmux_setup(unsigned short per, unsigned short function)
338 u16 y, offset, muxreg;
340 for (y = 0; y < ARRAY_SIZE(port_mux_lut); y++) {
341 if (port_mux_lut[y].res == per) {
343 /* SET PORTMUX REG */
345 offset = port_mux_lut[y].offset;
346 muxreg = bfin_read_PORT_MUX();
349 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)
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)
397 static void default_gpio(unsigned short gpio)
399 unsigned short bank, bitmask;
402 bank = gpio_bank(gpio);
403 bitmask = gpio_bit(gpio);
405 local_irq_save(flags);
407 gpio_bankb[bank]->maska_clear = bitmask;
408 gpio_bankb[bank]->maskb_clear = bitmask;
410 gpio_bankb[bank]->inen &= ~bitmask;
411 gpio_bankb[bank]->dir &= ~bitmask;
412 gpio_bankb[bank]->polar &= ~bitmask;
413 gpio_bankb[bank]->both &= ~bitmask;
414 gpio_bankb[bank]->edge &= ~bitmask;
415 AWA_DUMMY_READ(edge);
416 local_irq_restore(flags);
420 # define default_gpio(...) do { } while (0)
423 static int __init bfin_gpio_init(void)
426 printk(KERN_INFO "Blackfin GPIO Controller\n");
431 arch_initcall(bfin_gpio_init);
435 /***********************************************************
437 * FUNCTIONS: Blackfin General Purpose Ports Access Functions
440 * gpio - GPIO Number between 0 and MAX_BLACKFIN_GPIOS
443 * DESCRIPTION: These functions abstract direct register access
444 * to Blackfin processor General Purpose
447 * CAUTION: These functions do not belong to the GPIO Driver API
448 *************************************************************
449 * MODIFICATION HISTORY :
450 **************************************************************/
452 /* Set a specific bit */
454 #define SET_GPIO(name) \
455 void set_gpio_ ## name(unsigned short gpio, unsigned short arg) \
457 unsigned long flags; \
458 BUG_ON(!(reserved_gpio_map[gpio_bank(gpio)] & gpio_bit(gpio))); \
459 local_irq_save(flags); \
461 gpio_bankb[gpio_bank(gpio)]->name |= gpio_bit(gpio); \
463 gpio_bankb[gpio_bank(gpio)]->name &= ~gpio_bit(gpio); \
464 AWA_DUMMY_READ(name); \
465 local_irq_restore(flags); \
467 EXPORT_SYMBOL(set_gpio_ ## name);
476 #if ANOMALY_05000311 || ANOMALY_05000323
477 #define SET_GPIO_SC(name) \
478 void set_gpio_ ## name(unsigned short gpio, unsigned short arg) \
480 unsigned long flags; \
481 BUG_ON(!(reserved_gpio_map[gpio_bank(gpio)] & gpio_bit(gpio))); \
482 local_irq_save(flags); \
484 gpio_bankb[gpio_bank(gpio)]->name ## _set = gpio_bit(gpio); \
486 gpio_bankb[gpio_bank(gpio)]->name ## _clear = gpio_bit(gpio); \
487 AWA_DUMMY_READ(name); \
488 local_irq_restore(flags); \
490 EXPORT_SYMBOL(set_gpio_ ## name);
492 #define SET_GPIO_SC(name) \
493 void set_gpio_ ## name(unsigned short gpio, unsigned short arg) \
495 BUG_ON(!(reserved_gpio_map[gpio_bank(gpio)] & gpio_bit(gpio))); \
497 gpio_bankb[gpio_bank(gpio)]->name ## _set = gpio_bit(gpio); \
499 gpio_bankb[gpio_bank(gpio)]->name ## _clear = gpio_bit(gpio); \
501 EXPORT_SYMBOL(set_gpio_ ## name);
508 #if ANOMALY_05000311 || ANOMALY_05000323
509 void set_gpio_toggle(unsigned short gpio)
512 BUG_ON(!(reserved_gpio_map[gpio_bank(gpio)] & gpio_bit(gpio)));
513 local_irq_save(flags);
514 gpio_bankb[gpio_bank(gpio)]->toggle = gpio_bit(gpio);
515 AWA_DUMMY_READ(toggle);
516 local_irq_restore(flags);
519 void set_gpio_toggle(unsigned short gpio)
521 BUG_ON(!(reserved_gpio_map[gpio_bank(gpio)] & gpio_bit(gpio)));
522 gpio_bankb[gpio_bank(gpio)]->toggle = gpio_bit(gpio);
525 EXPORT_SYMBOL(set_gpio_toggle);
528 /*Set current PORT date (16-bit word)*/
530 #if ANOMALY_05000311 || ANOMALY_05000323
531 #define SET_GPIO_P(name) \
532 void set_gpiop_ ## name(unsigned short gpio, unsigned short arg) \
534 unsigned long flags; \
535 local_irq_save(flags); \
536 gpio_bankb[gpio_bank(gpio)]->name = arg; \
537 AWA_DUMMY_READ(name); \
538 local_irq_restore(flags); \
540 EXPORT_SYMBOL(set_gpiop_ ## name);
542 #define SET_GPIO_P(name) \
543 void set_gpiop_ ## name(unsigned short gpio, unsigned short arg) \
545 gpio_bankb[gpio_bank(gpio)]->name = arg; \
547 EXPORT_SYMBOL(set_gpiop_ ## name);
560 /* Get a specific bit */
561 #if ANOMALY_05000311 || ANOMALY_05000323
562 #define GET_GPIO(name) \
563 unsigned short get_gpio_ ## name(unsigned short gpio) \
565 unsigned long flags; \
566 unsigned short ret; \
567 local_irq_save(flags); \
568 ret = 0x01 & (gpio_bankb[gpio_bank(gpio)]->name >> gpio_sub_n(gpio)); \
569 AWA_DUMMY_READ(name); \
570 local_irq_restore(flags); \
573 EXPORT_SYMBOL(get_gpio_ ## name);
575 #define GET_GPIO(name) \
576 unsigned short get_gpio_ ## name(unsigned short gpio) \
578 return (0x01 & (gpio_bankb[gpio_bank(gpio)]->name >> gpio_sub_n(gpio))); \
580 EXPORT_SYMBOL(get_gpio_ ## name);
592 /*Get current PORT date (16-bit word)*/
594 #if ANOMALY_05000311 || ANOMALY_05000323
595 #define GET_GPIO_P(name) \
596 unsigned short get_gpiop_ ## name(unsigned short gpio) \
598 unsigned long flags; \
599 unsigned short ret; \
600 local_irq_save(flags); \
601 ret = (gpio_bankb[gpio_bank(gpio)]->name); \
602 AWA_DUMMY_READ(name); \
603 local_irq_restore(flags); \
606 EXPORT_SYMBOL(get_gpiop_ ## name);
608 #define GET_GPIO_P(name) \
609 unsigned short get_gpiop_ ## name(unsigned short gpio) \
611 return (gpio_bankb[gpio_bank(gpio)]->name);\
613 EXPORT_SYMBOL(get_gpiop_ ## name);
627 /***********************************************************
629 * FUNCTIONS: Blackfin PM Setup API
632 * gpio - GPIO Number between 0 and MAX_BLACKFIN_GPIOS
640 * DESCRIPTION: Blackfin PM Driver API
643 *************************************************************
644 * MODIFICATION HISTORY :
645 **************************************************************/
646 int gpio_pm_wakeup_request(unsigned short gpio, unsigned char type)
650 if ((check_gpio(gpio) < 0) || !type)
653 local_irq_save(flags);
655 wakeup_map[gpio_bank(gpio)] |= gpio_bit(gpio);
656 wakeup_flags_map[gpio] = type;
657 local_irq_restore(flags);
661 EXPORT_SYMBOL(gpio_pm_wakeup_request);
663 void gpio_pm_wakeup_free(unsigned short gpio)
667 if (check_gpio(gpio) < 0)
670 local_irq_save(flags);
672 wakeup_map[gpio_bank(gpio)] &= ~gpio_bit(gpio);
674 local_irq_restore(flags);
676 EXPORT_SYMBOL(gpio_pm_wakeup_free);
678 static int bfin_gpio_wakeup_type(unsigned short gpio, unsigned char type)
680 port_setup(gpio, GPIO_USAGE);
681 set_gpio_dir(gpio, 0);
682 set_gpio_inen(gpio, 1);
684 if (type & (PM_WAKE_RISING | PM_WAKE_FALLING))
685 set_gpio_edge(gpio, 1);
687 set_gpio_edge(gpio, 0);
689 if ((type & (PM_WAKE_BOTH_EDGES)) == (PM_WAKE_BOTH_EDGES))
690 set_gpio_both(gpio, 1);
692 set_gpio_both(gpio, 0);
694 if ((type & (PM_WAKE_FALLING | PM_WAKE_LOW)))
695 set_gpio_polar(gpio, 1);
697 set_gpio_polar(gpio, 0);
704 u32 gpio_pm_setup(void)
707 u16 bank, mask, i, gpio;
709 for (i = 0; i < MAX_BLACKFIN_GPIOS; i += GPIO_BANKSIZE) {
710 mask = wakeup_map[gpio_bank(i)];
713 gpio_bank_saved[bank].maskb = gpio_bankb[bank]->maskb;
714 gpio_bankb[bank]->maskb = 0;
718 gpio_bank_saved[bank].fer = *port_fer[bank];
720 gpio_bank_saved[bank].inen = gpio_bankb[bank]->inen;
721 gpio_bank_saved[bank].polar = gpio_bankb[bank]->polar;
722 gpio_bank_saved[bank].dir = gpio_bankb[bank]->dir;
723 gpio_bank_saved[bank].edge = gpio_bankb[bank]->edge;
724 gpio_bank_saved[bank].both = gpio_bankb[bank]->both;
725 gpio_bank_saved[bank].reserved =
726 reserved_gpio_map[bank];
732 reserved_gpio_map[gpio_bank(gpio)] |=
734 bfin_gpio_wakeup_type(gpio,
735 wakeup_flags_map[gpio]);
736 set_gpio_data(gpio, 0); /*Clear*/
743 (sic_iwr_irqs[bank] - (IRQ_CORETMR + 1));
744 gpio_bankb[bank]->maskb_set = wakeup_map[gpio_bank(i)];
748 AWA_DUMMY_READ(maskb_set);
753 return IWR_ENABLE_ALL;
756 void gpio_pm_restore(void)
760 for (i = 0; i < MAX_BLACKFIN_GPIOS; i += GPIO_BANKSIZE) {
761 mask = wakeup_map[gpio_bank(i)];
766 *port_fer[bank] = gpio_bank_saved[bank].fer;
768 gpio_bankb[bank]->inen = gpio_bank_saved[bank].inen;
769 gpio_bankb[bank]->dir = gpio_bank_saved[bank].dir;
770 gpio_bankb[bank]->polar = gpio_bank_saved[bank].polar;
771 gpio_bankb[bank]->edge = gpio_bank_saved[bank].edge;
772 gpio_bankb[bank]->both = gpio_bank_saved[bank].both;
774 reserved_gpio_map[bank] =
775 gpio_bank_saved[bank].reserved;
779 gpio_bankb[bank]->maskb = gpio_bank_saved[bank].maskb;
781 AWA_DUMMY_READ(maskb);
785 #else /* BF548_FAMILY */
787 unsigned short get_gpio_dir(unsigned short gpio)
789 return (0x01 & (gpio_array[gpio_bank(gpio)]->port_dir_clear >> gpio_sub_n(gpio)));
791 EXPORT_SYMBOL(get_gpio_dir);
793 #endif /* BF548_FAMILY */
795 /***********************************************************
797 * FUNCTIONS: Blackfin Peripheral Resource Allocation
801 * per Peripheral Identifier
804 * DESCRIPTION: Blackfin Peripheral Resource Allocation and Setup API
807 *************************************************************
808 * MODIFICATION HISTORY :
809 **************************************************************/
812 int peripheral_request(unsigned short per, const char *label)
815 unsigned short ident = P_IDENT(per);
818 * Don't cares are pins with only one dedicated function
821 if (per & P_DONTCARE)
824 if (!(per & P_DEFINED))
827 if (check_gpio(ident) < 0)
830 local_irq_save(flags);
832 if (unlikely(reserved_gpio_map[gpio_bank(ident)] & gpio_bit(ident))) {
834 "%s: Peripheral %d is already reserved as GPIO by %s !\n",
835 __FUNCTION__, ident, get_label(ident));
837 local_irq_restore(flags);
841 if (unlikely(reserved_peri_map[gpio_bank(ident)] & gpio_bit(ident))) {
843 u16 funct = get_portmux(ident);
846 * Pin functions like AMC address strobes my
847 * be requested and used by several drivers
850 if (!((per & P_MAYSHARE) && (funct == P_FUNCT2MUX(per)))) {
853 * Allow that the identical pin function can
854 * be requested from the same driver twice
857 if (cmp_label(ident, label) == 0)
861 "%s: Peripheral %d function %d is already reserved by %s !\n",
862 __FUNCTION__, ident, P_FUNCT2MUX(per), get_label(ident));
864 local_irq_restore(flags);
870 reserved_peri_map[gpio_bank(ident)] |= gpio_bit(ident);
872 portmux_setup(ident, P_FUNCT2MUX(per));
873 port_setup(ident, PERIPHERAL_USAGE);
875 local_irq_restore(flags);
876 set_label(ident, label);
880 EXPORT_SYMBOL(peripheral_request);
883 int peripheral_request(unsigned short per, const char *label)
886 unsigned short ident = P_IDENT(per);
889 * Don't cares are pins with only one dedicated function
892 if (per & P_DONTCARE)
895 if (!(per & P_DEFINED))
898 local_irq_save(flags);
900 if (!check_gpio(ident)) {
902 if (unlikely(reserved_gpio_map[gpio_bank(ident)] & gpio_bit(ident))) {
904 "%s: Peripheral %d is already reserved as GPIO by %s !\n",
905 __FUNCTION__, ident, get_label(ident));
907 local_irq_restore(flags);
913 if (unlikely(reserved_peri_map[gpio_bank(ident)] & gpio_bit(ident))) {
916 * Pin functions like AMC address strobes my
917 * be requested and used by several drivers
920 if (!(per & P_MAYSHARE)) {
923 * Allow that the identical pin function can
924 * be requested from the same driver twice
927 if (cmp_label(ident, label) == 0)
931 "%s: Peripheral %d function %d is already"
932 " reserved by %s !\n",
933 __FUNCTION__, ident, P_FUNCT2MUX(per),
936 local_irq_restore(flags);
943 portmux_setup(per, P_FUNCT2MUX(per));
945 port_setup(ident, PERIPHERAL_USAGE);
947 reserved_peri_map[gpio_bank(ident)] |= gpio_bit(ident);
948 local_irq_restore(flags);
949 set_label(ident, label);
953 EXPORT_SYMBOL(peripheral_request);
956 int peripheral_request_list(unsigned short per[], const char *label)
961 for (cnt = 0; per[cnt] != 0; cnt++) {
963 ret = peripheral_request(per[cnt], label);
966 for ( ; cnt > 0; cnt--) {
967 peripheral_free(per[cnt - 1]);
975 EXPORT_SYMBOL(peripheral_request_list);
977 void peripheral_free(unsigned short per)
980 unsigned short ident = P_IDENT(per);
982 if (per & P_DONTCARE)
985 if (!(per & P_DEFINED))
988 if (check_gpio(ident) < 0)
991 local_irq_save(flags);
993 if (unlikely(!(reserved_peri_map[gpio_bank(ident)]
994 & gpio_bit(ident)))) {
995 local_irq_restore(flags);
999 if (!(per & P_MAYSHARE)) {
1000 port_setup(ident, GPIO_USAGE);
1003 reserved_peri_map[gpio_bank(ident)] &= ~gpio_bit(ident);
1005 set_label(ident, "free");
1007 local_irq_restore(flags);
1009 EXPORT_SYMBOL(peripheral_free);
1011 void peripheral_free_list(unsigned short per[])
1015 for (cnt = 0; per[cnt] != 0; cnt++) {
1016 peripheral_free(per[cnt]);
1020 EXPORT_SYMBOL(peripheral_free_list);
1022 /***********************************************************
1024 * FUNCTIONS: Blackfin GPIO Driver
1027 * gpio PIO Number between 0 and MAX_BLACKFIN_GPIOS
1030 * DESCRIPTION: Blackfin GPIO Driver API
1033 *************************************************************
1034 * MODIFICATION HISTORY :
1035 **************************************************************/
1037 int gpio_request(unsigned short gpio, const char *label)
1039 unsigned long flags;
1041 if (check_gpio(gpio) < 0)
1044 local_irq_save(flags);
1047 * Allow that the identical GPIO can
1048 * be requested from the same driver twice
1049 * Do nothing and return -
1052 if (cmp_label(gpio, label) == 0) {
1053 local_irq_restore(flags);
1057 if (unlikely(reserved_gpio_map[gpio_bank(gpio)] & gpio_bit(gpio))) {
1058 printk(KERN_ERR "bfin-gpio: GPIO %d is already reserved by %s !\n",
1059 gpio, get_label(gpio));
1061 local_irq_restore(flags);
1064 if (unlikely(reserved_peri_map[gpio_bank(gpio)] & gpio_bit(gpio))) {
1066 "bfin-gpio: GPIO %d is already reserved as Peripheral by %s !\n",
1067 gpio, get_label(gpio));
1069 local_irq_restore(flags);
1073 reserved_gpio_map[gpio_bank(gpio)] |= gpio_bit(gpio);
1075 local_irq_restore(flags);
1077 port_setup(gpio, GPIO_USAGE);
1078 set_label(gpio, label);
1082 EXPORT_SYMBOL(gpio_request);
1084 void gpio_free(unsigned short gpio)
1086 unsigned long flags;
1088 if (check_gpio(gpio) < 0)
1091 local_irq_save(flags);
1093 if (unlikely(!(reserved_gpio_map[gpio_bank(gpio)] & gpio_bit(gpio)))) {
1094 printk(KERN_ERR "bfin-gpio: GPIO %d wasn't reserved!\n", gpio);
1096 local_irq_restore(flags);
1102 reserved_gpio_map[gpio_bank(gpio)] &= ~gpio_bit(gpio);
1104 set_label(gpio, "free");
1106 local_irq_restore(flags);
1108 EXPORT_SYMBOL(gpio_free);
1111 void gpio_direction_input(unsigned short gpio)
1113 unsigned long flags;
1115 BUG_ON(!(reserved_gpio_map[gpio_bank(gpio)] & gpio_bit(gpio)));
1117 local_irq_save(flags);
1118 gpio_array[gpio_bank(gpio)]->port_dir_clear = gpio_bit(gpio);
1119 gpio_array[gpio_bank(gpio)]->port_inen |= gpio_bit(gpio);
1120 local_irq_restore(flags);
1122 EXPORT_SYMBOL(gpio_direction_input);
1124 void gpio_direction_output(unsigned short gpio)
1126 unsigned long flags;
1128 BUG_ON(!(reserved_gpio_map[gpio_bank(gpio)] & gpio_bit(gpio)));
1130 local_irq_save(flags);
1131 gpio_array[gpio_bank(gpio)]->port_inen &= ~gpio_bit(gpio);
1132 gpio_array[gpio_bank(gpio)]->port_dir_set = gpio_bit(gpio);
1133 local_irq_restore(flags);
1135 EXPORT_SYMBOL(gpio_direction_output);
1137 void gpio_set_value(unsigned short gpio, unsigned short arg)
1140 gpio_array[gpio_bank(gpio)]->port_set = gpio_bit(gpio);
1142 gpio_array[gpio_bank(gpio)]->port_clear = gpio_bit(gpio);
1145 EXPORT_SYMBOL(gpio_set_value);
1147 unsigned short gpio_get_value(unsigned short gpio)
1149 return (1 & (gpio_array[gpio_bank(gpio)]->port_data >> gpio_sub_n(gpio)));
1151 EXPORT_SYMBOL(gpio_get_value);
1155 void gpio_direction_input(unsigned short gpio)
1157 unsigned long flags;
1159 BUG_ON(!(reserved_gpio_map[gpio_bank(gpio)] & gpio_bit(gpio)));
1161 local_irq_save(flags);
1162 gpio_bankb[gpio_bank(gpio)]->dir &= ~gpio_bit(gpio);
1163 gpio_bankb[gpio_bank(gpio)]->inen |= gpio_bit(gpio);
1164 AWA_DUMMY_READ(inen);
1165 local_irq_restore(flags);
1167 EXPORT_SYMBOL(gpio_direction_input);
1169 void gpio_direction_output(unsigned short gpio)
1171 unsigned long flags;
1173 BUG_ON(!(reserved_gpio_map[gpio_bank(gpio)] & gpio_bit(gpio)));
1175 local_irq_save(flags);
1176 gpio_bankb[gpio_bank(gpio)]->inen &= ~gpio_bit(gpio);
1177 gpio_bankb[gpio_bank(gpio)]->dir |= gpio_bit(gpio);
1178 AWA_DUMMY_READ(dir);
1179 local_irq_restore(flags);
1181 EXPORT_SYMBOL(gpio_direction_output);
1183 /* If we are booting from SPI and our board lacks a strong enough pull up,
1184 * the core can reset and execute the bootrom faster than the resistor can
1185 * pull the signal logically high. To work around this (common) error in
1186 * board design, we explicitly set the pin back to GPIO mode, force /CS
1187 * high, and wait for the electrons to do their thing.
1189 * This function only makes sense to be called from reset code, but it
1190 * lives here as we need to force all the GPIO states w/out going through
1191 * BUG() checks and such.
1193 void bfin_gpio_reset_spi0_ssel1(void)
1195 u16 gpio = P_IDENT(P_SPI0_SSEL1);
1197 port_setup(gpio, GPIO_USAGE);
1198 gpio_bankb[gpio_bank(gpio)]->data_set = gpio_bit(gpio);
1202 #endif /*BF548_FAMILY */
1204 #if defined(CONFIG_PROC_FS)
1205 static int gpio_proc_read(char *buf, char **start, off_t offset,
1206 int len, int *unused_i, void *unused_v)
1210 for (c = 0; c < MAX_RESOURCES; c++) {
1211 if (!check_gpio(c) && (reserved_gpio_map[gpio_bank(c)] & gpio_bit(c)))
1212 len = sprintf(buf, "GPIO_%d: %s \t\tGPIO %s\n", c,
1213 get_label(c), get_gpio_dir(c) ? "OUTPUT" : "INPUT");
1214 else if (reserved_peri_map[gpio_bank(c)] & gpio_bit(c))
1215 len = sprintf(buf, "GPIO_%d: %s \t\tPeripheral\n", c, get_label(c));
1224 static __init int gpio_register_proc(void)
1226 struct proc_dir_entry *proc_gpio;
1228 proc_gpio = create_proc_entry("gpio", S_IRUGO, NULL);
1230 proc_gpio->read_proc = gpio_proc_read;
1231 return proc_gpio != NULL;
1234 __initcall(gpio_register_proc);