2 * linux/arch/arm/plat-omap/gpio.c
4 * Support functions for OMAP GPIO
6 * Copyright (C) 2003-2005 Nokia Corporation
7 * Written by Juha Yrjölä <juha.yrjola@nokia.com>
9 * Copyright (C) 2009 Texas Instruments
10 * Added OMAP4 support - Santosh Shilimkar <santosh.shilimkar@ti.com>
12 * This program is free software; you can redistribute it and/or modify
13 * it under the terms of the GNU General Public License version 2 as
14 * published by the Free Software Foundation.
17 #include <linux/init.h>
18 #include <linux/module.h>
19 #include <linux/interrupt.h>
20 #include <linux/syscore_ops.h>
21 #include <linux/err.h>
22 #include <linux/clk.h>
24 #include <linux/slab.h>
25 #include <linux/pm_runtime.h>
27 #include <mach/hardware.h>
29 #include <mach/irqs.h>
30 #include <mach/gpio.h>
31 #include <asm/mach/irq.h>
34 * OMAP1510 GPIO registers
36 #define OMAP1510_GPIO_DATA_INPUT 0x00
37 #define OMAP1510_GPIO_DATA_OUTPUT 0x04
38 #define OMAP1510_GPIO_DIR_CONTROL 0x08
39 #define OMAP1510_GPIO_INT_CONTROL 0x0c
40 #define OMAP1510_GPIO_INT_MASK 0x10
41 #define OMAP1510_GPIO_INT_STATUS 0x14
42 #define OMAP1510_GPIO_PIN_CONTROL 0x18
44 #define OMAP1510_IH_GPIO_BASE 64
47 * OMAP1610 specific GPIO registers
49 #define OMAP1610_GPIO_REVISION 0x0000
50 #define OMAP1610_GPIO_SYSCONFIG 0x0010
51 #define OMAP1610_GPIO_SYSSTATUS 0x0014
52 #define OMAP1610_GPIO_IRQSTATUS1 0x0018
53 #define OMAP1610_GPIO_IRQENABLE1 0x001c
54 #define OMAP1610_GPIO_WAKEUPENABLE 0x0028
55 #define OMAP1610_GPIO_DATAIN 0x002c
56 #define OMAP1610_GPIO_DATAOUT 0x0030
57 #define OMAP1610_GPIO_DIRECTION 0x0034
58 #define OMAP1610_GPIO_EDGE_CTRL1 0x0038
59 #define OMAP1610_GPIO_EDGE_CTRL2 0x003c
60 #define OMAP1610_GPIO_CLEAR_IRQENABLE1 0x009c
61 #define OMAP1610_GPIO_CLEAR_WAKEUPENA 0x00a8
62 #define OMAP1610_GPIO_CLEAR_DATAOUT 0x00b0
63 #define OMAP1610_GPIO_SET_IRQENABLE1 0x00dc
64 #define OMAP1610_GPIO_SET_WAKEUPENA 0x00e8
65 #define OMAP1610_GPIO_SET_DATAOUT 0x00f0
68 * OMAP7XX specific GPIO registers
70 #define OMAP7XX_GPIO_DATA_INPUT 0x00
71 #define OMAP7XX_GPIO_DATA_OUTPUT 0x04
72 #define OMAP7XX_GPIO_DIR_CONTROL 0x08
73 #define OMAP7XX_GPIO_INT_CONTROL 0x0c
74 #define OMAP7XX_GPIO_INT_MASK 0x10
75 #define OMAP7XX_GPIO_INT_STATUS 0x14
78 * omap2+ specific GPIO registers
80 #define OMAP24XX_GPIO_REVISION 0x0000
81 #define OMAP24XX_GPIO_IRQSTATUS1 0x0018
82 #define OMAP24XX_GPIO_IRQSTATUS2 0x0028
83 #define OMAP24XX_GPIO_IRQENABLE2 0x002c
84 #define OMAP24XX_GPIO_IRQENABLE1 0x001c
85 #define OMAP24XX_GPIO_WAKE_EN 0x0020
86 #define OMAP24XX_GPIO_CTRL 0x0030
87 #define OMAP24XX_GPIO_OE 0x0034
88 #define OMAP24XX_GPIO_DATAIN 0x0038
89 #define OMAP24XX_GPIO_DATAOUT 0x003c
90 #define OMAP24XX_GPIO_LEVELDETECT0 0x0040
91 #define OMAP24XX_GPIO_LEVELDETECT1 0x0044
92 #define OMAP24XX_GPIO_RISINGDETECT 0x0048
93 #define OMAP24XX_GPIO_FALLINGDETECT 0x004c
94 #define OMAP24XX_GPIO_DEBOUNCE_EN 0x0050
95 #define OMAP24XX_GPIO_DEBOUNCE_VAL 0x0054
96 #define OMAP24XX_GPIO_CLEARIRQENABLE1 0x0060
97 #define OMAP24XX_GPIO_SETIRQENABLE1 0x0064
98 #define OMAP24XX_GPIO_CLEARWKUENA 0x0080
99 #define OMAP24XX_GPIO_SETWKUENA 0x0084
100 #define OMAP24XX_GPIO_CLEARDATAOUT 0x0090
101 #define OMAP24XX_GPIO_SETDATAOUT 0x0094
103 #define OMAP4_GPIO_REVISION 0x0000
104 #define OMAP4_GPIO_EOI 0x0020
105 #define OMAP4_GPIO_IRQSTATUSRAW0 0x0024
106 #define OMAP4_GPIO_IRQSTATUSRAW1 0x0028
107 #define OMAP4_GPIO_IRQSTATUS0 0x002c
108 #define OMAP4_GPIO_IRQSTATUS1 0x0030
109 #define OMAP4_GPIO_IRQSTATUSSET0 0x0034
110 #define OMAP4_GPIO_IRQSTATUSSET1 0x0038
111 #define OMAP4_GPIO_IRQSTATUSCLR0 0x003c
112 #define OMAP4_GPIO_IRQSTATUSCLR1 0x0040
113 #define OMAP4_GPIO_IRQWAKEN0 0x0044
114 #define OMAP4_GPIO_IRQWAKEN1 0x0048
115 #define OMAP4_GPIO_IRQENABLE1 0x011c
116 #define OMAP4_GPIO_WAKE_EN 0x0120
117 #define OMAP4_GPIO_IRQSTATUS2 0x0128
118 #define OMAP4_GPIO_IRQENABLE2 0x012c
119 #define OMAP4_GPIO_CTRL 0x0130
120 #define OMAP4_GPIO_OE 0x0134
121 #define OMAP4_GPIO_DATAIN 0x0138
122 #define OMAP4_GPIO_DATAOUT 0x013c
123 #define OMAP4_GPIO_LEVELDETECT0 0x0140
124 #define OMAP4_GPIO_LEVELDETECT1 0x0144
125 #define OMAP4_GPIO_RISINGDETECT 0x0148
126 #define OMAP4_GPIO_FALLINGDETECT 0x014c
127 #define OMAP4_GPIO_DEBOUNCENABLE 0x0150
128 #define OMAP4_GPIO_DEBOUNCINGTIME 0x0154
129 #define OMAP4_GPIO_CLEARIRQENABLE1 0x0160
130 #define OMAP4_GPIO_SETIRQENABLE1 0x0164
131 #define OMAP4_GPIO_CLEARWKUENA 0x0180
132 #define OMAP4_GPIO_SETWKUENA 0x0184
133 #define OMAP4_GPIO_CLEARDATAOUT 0x0190
134 #define OMAP4_GPIO_SETDATAOUT 0x0194
140 u16 virtual_irq_start;
142 #if defined(CONFIG_ARCH_OMAP16XX) || defined(CONFIG_ARCH_OMAP2PLUS)
146 u32 non_wakeup_gpios;
147 u32 enabled_non_wakeup_gpios;
150 u32 saved_fallingdetect;
151 u32 saved_risingdetect;
155 struct gpio_chip chip;
158 u32 dbck_enable_mask;
164 #ifdef CONFIG_ARCH_OMAP3
165 struct omap3_gpio_regs {
178 static struct omap3_gpio_regs gpio_context[OMAP34XX_NR_GPIOS];
182 * TODO: Cleanup gpio_bank usage as it is having information
183 * related to all instances of the device
185 static struct gpio_bank *gpio_bank;
187 static int bank_width;
189 /* TODO: Analyze removing gpio_bank_count usage from driver code */
192 static inline struct gpio_bank *get_gpio_bank(int gpio)
194 if (cpu_is_omap15xx()) {
195 if (OMAP_GPIO_IS_MPUIO(gpio))
196 return &gpio_bank[0];
197 return &gpio_bank[1];
199 if (cpu_is_omap16xx()) {
200 if (OMAP_GPIO_IS_MPUIO(gpio))
201 return &gpio_bank[0];
202 return &gpio_bank[1 + (gpio >> 4)];
204 if (cpu_is_omap7xx()) {
205 if (OMAP_GPIO_IS_MPUIO(gpio))
206 return &gpio_bank[0];
207 return &gpio_bank[1 + (gpio >> 5)];
209 if (cpu_is_omap24xx())
210 return &gpio_bank[gpio >> 5];
211 if (cpu_is_omap34xx() || cpu_is_omap44xx())
212 return &gpio_bank[gpio >> 5];
217 static inline int get_gpio_index(int gpio)
219 if (cpu_is_omap7xx())
221 if (cpu_is_omap24xx())
223 if (cpu_is_omap34xx() || cpu_is_omap44xx())
228 static inline int gpio_valid(int gpio)
232 if (cpu_class_is_omap1() && OMAP_GPIO_IS_MPUIO(gpio)) {
233 if (gpio >= OMAP_MAX_GPIO_LINES + 16)
237 if (cpu_is_omap15xx() && gpio < 16)
239 if ((cpu_is_omap16xx()) && gpio < 64)
241 if (cpu_is_omap7xx() && gpio < 192)
243 if (cpu_is_omap2420() && gpio < 128)
245 if (cpu_is_omap2430() && gpio < 160)
247 if ((cpu_is_omap34xx() || cpu_is_omap44xx()) && gpio < 192)
252 static int check_gpio(int gpio)
254 if (unlikely(gpio_valid(gpio) < 0)) {
255 printk(KERN_ERR "omap-gpio: invalid GPIO %d\n", gpio);
262 static void _set_gpio_direction(struct gpio_bank *bank, int gpio, int is_input)
264 void __iomem *reg = bank->base;
267 switch (bank->method) {
268 #ifdef CONFIG_ARCH_OMAP1
270 reg += OMAP_MPUIO_IO_CNTL / bank->stride;
273 #ifdef CONFIG_ARCH_OMAP15XX
274 case METHOD_GPIO_1510:
275 reg += OMAP1510_GPIO_DIR_CONTROL;
278 #ifdef CONFIG_ARCH_OMAP16XX
279 case METHOD_GPIO_1610:
280 reg += OMAP1610_GPIO_DIRECTION;
283 #if defined(CONFIG_ARCH_OMAP730) || defined(CONFIG_ARCH_OMAP850)
284 case METHOD_GPIO_7XX:
285 reg += OMAP7XX_GPIO_DIR_CONTROL;
288 #if defined(CONFIG_ARCH_OMAP2) || defined(CONFIG_ARCH_OMAP3)
289 case METHOD_GPIO_24XX:
290 reg += OMAP24XX_GPIO_OE;
293 #if defined(CONFIG_ARCH_OMAP4)
294 case METHOD_GPIO_44XX:
295 reg += OMAP4_GPIO_OE;
302 l = __raw_readl(reg);
307 __raw_writel(l, reg);
310 static void _set_gpio_dataout(struct gpio_bank *bank, int gpio, int enable)
312 void __iomem *reg = bank->base;
315 switch (bank->method) {
316 #ifdef CONFIG_ARCH_OMAP1
318 reg += OMAP_MPUIO_OUTPUT / bank->stride;
319 l = __raw_readl(reg);
326 #ifdef CONFIG_ARCH_OMAP15XX
327 case METHOD_GPIO_1510:
328 reg += OMAP1510_GPIO_DATA_OUTPUT;
329 l = __raw_readl(reg);
336 #ifdef CONFIG_ARCH_OMAP16XX
337 case METHOD_GPIO_1610:
339 reg += OMAP1610_GPIO_SET_DATAOUT;
341 reg += OMAP1610_GPIO_CLEAR_DATAOUT;
345 #if defined(CONFIG_ARCH_OMAP730) || defined(CONFIG_ARCH_OMAP850)
346 case METHOD_GPIO_7XX:
347 reg += OMAP7XX_GPIO_DATA_OUTPUT;
348 l = __raw_readl(reg);
355 #if defined(CONFIG_ARCH_OMAP2) || defined(CONFIG_ARCH_OMAP3)
356 case METHOD_GPIO_24XX:
358 reg += OMAP24XX_GPIO_SETDATAOUT;
360 reg += OMAP24XX_GPIO_CLEARDATAOUT;
364 #ifdef CONFIG_ARCH_OMAP4
365 case METHOD_GPIO_44XX:
367 reg += OMAP4_GPIO_SETDATAOUT;
369 reg += OMAP4_GPIO_CLEARDATAOUT;
377 __raw_writel(l, reg);
380 static int _get_gpio_datain(struct gpio_bank *bank, int gpio)
384 if (check_gpio(gpio) < 0)
387 switch (bank->method) {
388 #ifdef CONFIG_ARCH_OMAP1
390 reg += OMAP_MPUIO_INPUT_LATCH / bank->stride;
393 #ifdef CONFIG_ARCH_OMAP15XX
394 case METHOD_GPIO_1510:
395 reg += OMAP1510_GPIO_DATA_INPUT;
398 #ifdef CONFIG_ARCH_OMAP16XX
399 case METHOD_GPIO_1610:
400 reg += OMAP1610_GPIO_DATAIN;
403 #if defined(CONFIG_ARCH_OMAP730) || defined(CONFIG_ARCH_OMAP850)
404 case METHOD_GPIO_7XX:
405 reg += OMAP7XX_GPIO_DATA_INPUT;
408 #if defined(CONFIG_ARCH_OMAP2) || defined(CONFIG_ARCH_OMAP3)
409 case METHOD_GPIO_24XX:
410 reg += OMAP24XX_GPIO_DATAIN;
413 #ifdef CONFIG_ARCH_OMAP4
414 case METHOD_GPIO_44XX:
415 reg += OMAP4_GPIO_DATAIN;
421 return (__raw_readl(reg)
422 & (1 << get_gpio_index(gpio))) != 0;
425 static int _get_gpio_dataout(struct gpio_bank *bank, int gpio)
429 if (check_gpio(gpio) < 0)
433 switch (bank->method) {
434 #ifdef CONFIG_ARCH_OMAP1
436 reg += OMAP_MPUIO_OUTPUT / bank->stride;
439 #ifdef CONFIG_ARCH_OMAP15XX
440 case METHOD_GPIO_1510:
441 reg += OMAP1510_GPIO_DATA_OUTPUT;
444 #ifdef CONFIG_ARCH_OMAP16XX
445 case METHOD_GPIO_1610:
446 reg += OMAP1610_GPIO_DATAOUT;
449 #if defined(CONFIG_ARCH_OMAP730) || defined(CONFIG_ARCH_OMAP850)
450 case METHOD_GPIO_7XX:
451 reg += OMAP7XX_GPIO_DATA_OUTPUT;
454 #if defined(CONFIG_ARCH_OMAP2) || defined(CONFIG_ARCH_OMAP3)
455 case METHOD_GPIO_24XX:
456 reg += OMAP24XX_GPIO_DATAOUT;
459 #ifdef CONFIG_ARCH_OMAP4
460 case METHOD_GPIO_44XX:
461 reg += OMAP4_GPIO_DATAOUT;
468 return (__raw_readl(reg) & (1 << get_gpio_index(gpio))) != 0;
471 #define MOD_REG_BIT(reg, bit_mask, set) \
473 int l = __raw_readl(base + reg); \
474 if (set) l |= bit_mask; \
475 else l &= ~bit_mask; \
476 __raw_writel(l, base + reg); \
480 * _set_gpio_debounce - low level gpio debounce time
481 * @bank: the gpio bank we're acting upon
482 * @gpio: the gpio number on this @gpio
483 * @debounce: debounce time to use
485 * OMAP's debounce time is in 31us steps so we need
486 * to convert and round up to the closest unit.
488 static void _set_gpio_debounce(struct gpio_bank *bank, unsigned gpio,
491 void __iomem *reg = bank->base;
495 if (!bank->dbck_flag)
500 else if (debounce > 7936)
503 debounce = (debounce / 0x1f) - 1;
505 l = 1 << get_gpio_index(gpio);
507 if (bank->method == METHOD_GPIO_44XX)
508 reg += OMAP4_GPIO_DEBOUNCINGTIME;
510 reg += OMAP24XX_GPIO_DEBOUNCE_VAL;
512 __raw_writel(debounce, reg);
515 if (bank->method == METHOD_GPIO_44XX)
516 reg += OMAP4_GPIO_DEBOUNCENABLE;
518 reg += OMAP24XX_GPIO_DEBOUNCE_EN;
520 val = __raw_readl(reg);
524 clk_enable(bank->dbck);
527 clk_disable(bank->dbck);
529 bank->dbck_enable_mask = val;
531 __raw_writel(val, reg);
534 #ifdef CONFIG_ARCH_OMAP2PLUS
535 static inline void set_24xx_gpio_triggering(struct gpio_bank *bank, int gpio,
538 void __iomem *base = bank->base;
539 u32 gpio_bit = 1 << gpio;
542 if (cpu_is_omap44xx()) {
543 MOD_REG_BIT(OMAP4_GPIO_LEVELDETECT0, gpio_bit,
544 trigger & IRQ_TYPE_LEVEL_LOW);
545 MOD_REG_BIT(OMAP4_GPIO_LEVELDETECT1, gpio_bit,
546 trigger & IRQ_TYPE_LEVEL_HIGH);
547 MOD_REG_BIT(OMAP4_GPIO_RISINGDETECT, gpio_bit,
548 trigger & IRQ_TYPE_EDGE_RISING);
549 MOD_REG_BIT(OMAP4_GPIO_FALLINGDETECT, gpio_bit,
550 trigger & IRQ_TYPE_EDGE_FALLING);
552 MOD_REG_BIT(OMAP24XX_GPIO_LEVELDETECT0, gpio_bit,
553 trigger & IRQ_TYPE_LEVEL_LOW);
554 MOD_REG_BIT(OMAP24XX_GPIO_LEVELDETECT1, gpio_bit,
555 trigger & IRQ_TYPE_LEVEL_HIGH);
556 MOD_REG_BIT(OMAP24XX_GPIO_RISINGDETECT, gpio_bit,
557 trigger & IRQ_TYPE_EDGE_RISING);
558 MOD_REG_BIT(OMAP24XX_GPIO_FALLINGDETECT, gpio_bit,
559 trigger & IRQ_TYPE_EDGE_FALLING);
561 if (likely(!(bank->non_wakeup_gpios & gpio_bit))) {
562 if (cpu_is_omap44xx()) {
564 __raw_writel(1 << gpio, bank->base+
565 OMAP4_GPIO_IRQWAKEN0);
567 val = __raw_readl(bank->base +
568 OMAP4_GPIO_IRQWAKEN0);
569 __raw_writel(val & (~(1 << gpio)), bank->base +
570 OMAP4_GPIO_IRQWAKEN0);
574 * GPIO wakeup request can only be generated on edge
577 if (trigger & IRQ_TYPE_EDGE_BOTH)
578 __raw_writel(1 << gpio, bank->base
579 + OMAP24XX_GPIO_SETWKUENA);
581 __raw_writel(1 << gpio, bank->base
582 + OMAP24XX_GPIO_CLEARWKUENA);
585 /* This part needs to be executed always for OMAP34xx */
586 if (cpu_is_omap34xx() || (bank->non_wakeup_gpios & gpio_bit)) {
588 * Log the edge gpio and manually trigger the IRQ
589 * after resume if the input level changes
590 * to avoid irq lost during PER RET/OFF mode
591 * Applies for omap2 non-wakeup gpio and all omap3 gpios
593 if (trigger & IRQ_TYPE_EDGE_BOTH)
594 bank->enabled_non_wakeup_gpios |= gpio_bit;
596 bank->enabled_non_wakeup_gpios &= ~gpio_bit;
599 if (cpu_is_omap44xx()) {
601 __raw_readl(bank->base + OMAP4_GPIO_LEVELDETECT0) |
602 __raw_readl(bank->base + OMAP4_GPIO_LEVELDETECT1);
605 __raw_readl(bank->base + OMAP24XX_GPIO_LEVELDETECT0) |
606 __raw_readl(bank->base + OMAP24XX_GPIO_LEVELDETECT1);
611 #ifdef CONFIG_ARCH_OMAP1
613 * This only applies to chips that can't do both rising and falling edge
614 * detection at once. For all other chips, this function is a noop.
616 static void _toggle_gpio_edge_triggering(struct gpio_bank *bank, int gpio)
618 void __iomem *reg = bank->base;
621 switch (bank->method) {
623 reg += OMAP_MPUIO_GPIO_INT_EDGE / bank->stride;
625 #ifdef CONFIG_ARCH_OMAP15XX
626 case METHOD_GPIO_1510:
627 reg += OMAP1510_GPIO_INT_CONTROL;
630 #if defined(CONFIG_ARCH_OMAP730) || defined(CONFIG_ARCH_OMAP850)
631 case METHOD_GPIO_7XX:
632 reg += OMAP7XX_GPIO_INT_CONTROL;
639 l = __raw_readl(reg);
645 __raw_writel(l, reg);
649 static int _set_gpio_triggering(struct gpio_bank *bank, int gpio, int trigger)
651 void __iomem *reg = bank->base;
654 switch (bank->method) {
655 #ifdef CONFIG_ARCH_OMAP1
657 reg += OMAP_MPUIO_GPIO_INT_EDGE / bank->stride;
658 l = __raw_readl(reg);
659 if ((trigger & IRQ_TYPE_SENSE_MASK) == IRQ_TYPE_EDGE_BOTH)
660 bank->toggle_mask |= 1 << gpio;
661 if (trigger & IRQ_TYPE_EDGE_RISING)
663 else if (trigger & IRQ_TYPE_EDGE_FALLING)
669 #ifdef CONFIG_ARCH_OMAP15XX
670 case METHOD_GPIO_1510:
671 reg += OMAP1510_GPIO_INT_CONTROL;
672 l = __raw_readl(reg);
673 if ((trigger & IRQ_TYPE_SENSE_MASK) == IRQ_TYPE_EDGE_BOTH)
674 bank->toggle_mask |= 1 << gpio;
675 if (trigger & IRQ_TYPE_EDGE_RISING)
677 else if (trigger & IRQ_TYPE_EDGE_FALLING)
683 #ifdef CONFIG_ARCH_OMAP16XX
684 case METHOD_GPIO_1610:
686 reg += OMAP1610_GPIO_EDGE_CTRL2;
688 reg += OMAP1610_GPIO_EDGE_CTRL1;
690 l = __raw_readl(reg);
691 l &= ~(3 << (gpio << 1));
692 if (trigger & IRQ_TYPE_EDGE_RISING)
693 l |= 2 << (gpio << 1);
694 if (trigger & IRQ_TYPE_EDGE_FALLING)
695 l |= 1 << (gpio << 1);
697 /* Enable wake-up during idle for dynamic tick */
698 __raw_writel(1 << gpio, bank->base + OMAP1610_GPIO_SET_WAKEUPENA);
700 __raw_writel(1 << gpio, bank->base + OMAP1610_GPIO_CLEAR_WAKEUPENA);
703 #if defined(CONFIG_ARCH_OMAP730) || defined(CONFIG_ARCH_OMAP850)
704 case METHOD_GPIO_7XX:
705 reg += OMAP7XX_GPIO_INT_CONTROL;
706 l = __raw_readl(reg);
707 if ((trigger & IRQ_TYPE_SENSE_MASK) == IRQ_TYPE_EDGE_BOTH)
708 bank->toggle_mask |= 1 << gpio;
709 if (trigger & IRQ_TYPE_EDGE_RISING)
711 else if (trigger & IRQ_TYPE_EDGE_FALLING)
717 #ifdef CONFIG_ARCH_OMAP2PLUS
718 case METHOD_GPIO_24XX:
719 case METHOD_GPIO_44XX:
720 set_24xx_gpio_triggering(bank, gpio, trigger);
726 __raw_writel(l, reg);
732 static int gpio_irq_type(struct irq_data *d, unsigned type)
734 struct gpio_bank *bank;
739 if (!cpu_class_is_omap2() && d->irq > IH_MPUIO_BASE)
740 gpio = OMAP_MPUIO(d->irq - IH_MPUIO_BASE);
742 gpio = d->irq - IH_GPIO_BASE;
744 if (check_gpio(gpio) < 0)
747 if (type & ~IRQ_TYPE_SENSE_MASK)
750 /* OMAP1 allows only only edge triggering */
751 if (!cpu_class_is_omap2()
752 && (type & (IRQ_TYPE_LEVEL_LOW|IRQ_TYPE_LEVEL_HIGH)))
755 bank = irq_data_get_irq_chip_data(d);
756 spin_lock_irqsave(&bank->lock, flags);
757 retval = _set_gpio_triggering(bank, get_gpio_index(gpio), type);
758 spin_unlock_irqrestore(&bank->lock, flags);
760 if (type & (IRQ_TYPE_LEVEL_LOW | IRQ_TYPE_LEVEL_HIGH))
761 __irq_set_handler_locked(d->irq, handle_level_irq);
762 else if (type & (IRQ_TYPE_EDGE_FALLING | IRQ_TYPE_EDGE_RISING))
763 __irq_set_handler_locked(d->irq, handle_edge_irq);
768 static void _clear_gpio_irqbank(struct gpio_bank *bank, int gpio_mask)
770 void __iomem *reg = bank->base;
772 switch (bank->method) {
773 #ifdef CONFIG_ARCH_OMAP1
775 /* MPUIO irqstatus is reset by reading the status register,
776 * so do nothing here */
779 #ifdef CONFIG_ARCH_OMAP15XX
780 case METHOD_GPIO_1510:
781 reg += OMAP1510_GPIO_INT_STATUS;
784 #ifdef CONFIG_ARCH_OMAP16XX
785 case METHOD_GPIO_1610:
786 reg += OMAP1610_GPIO_IRQSTATUS1;
789 #if defined(CONFIG_ARCH_OMAP730) || defined(CONFIG_ARCH_OMAP850)
790 case METHOD_GPIO_7XX:
791 reg += OMAP7XX_GPIO_INT_STATUS;
794 #if defined(CONFIG_ARCH_OMAP2) || defined(CONFIG_ARCH_OMAP3)
795 case METHOD_GPIO_24XX:
796 reg += OMAP24XX_GPIO_IRQSTATUS1;
799 #if defined(CONFIG_ARCH_OMAP4)
800 case METHOD_GPIO_44XX:
801 reg += OMAP4_GPIO_IRQSTATUS0;
808 __raw_writel(gpio_mask, reg);
810 /* Workaround for clearing DSP GPIO interrupts to allow retention */
811 if (cpu_is_omap24xx() || cpu_is_omap34xx())
812 reg = bank->base + OMAP24XX_GPIO_IRQSTATUS2;
813 else if (cpu_is_omap44xx())
814 reg = bank->base + OMAP4_GPIO_IRQSTATUS1;
816 if (cpu_is_omap24xx() || cpu_is_omap34xx() || cpu_is_omap44xx()) {
817 __raw_writel(gpio_mask, reg);
819 /* Flush posted write for the irq status to avoid spurious interrupts */
824 static inline void _clear_gpio_irqstatus(struct gpio_bank *bank, int gpio)
826 _clear_gpio_irqbank(bank, 1 << get_gpio_index(gpio));
829 static u32 _get_gpio_irqbank_mask(struct gpio_bank *bank)
831 void __iomem *reg = bank->base;
836 switch (bank->method) {
837 #ifdef CONFIG_ARCH_OMAP1
839 reg += OMAP_MPUIO_GPIO_MASKIT / bank->stride;
844 #ifdef CONFIG_ARCH_OMAP15XX
845 case METHOD_GPIO_1510:
846 reg += OMAP1510_GPIO_INT_MASK;
851 #ifdef CONFIG_ARCH_OMAP16XX
852 case METHOD_GPIO_1610:
853 reg += OMAP1610_GPIO_IRQENABLE1;
857 #if defined(CONFIG_ARCH_OMAP730) || defined(CONFIG_ARCH_OMAP850)
858 case METHOD_GPIO_7XX:
859 reg += OMAP7XX_GPIO_INT_MASK;
864 #if defined(CONFIG_ARCH_OMAP2) || defined(CONFIG_ARCH_OMAP3)
865 case METHOD_GPIO_24XX:
866 reg += OMAP24XX_GPIO_IRQENABLE1;
870 #if defined(CONFIG_ARCH_OMAP4)
871 case METHOD_GPIO_44XX:
872 reg += OMAP4_GPIO_IRQSTATUSSET0;
881 l = __raw_readl(reg);
888 static void _enable_gpio_irqbank(struct gpio_bank *bank, int gpio_mask, int enable)
890 void __iomem *reg = bank->base;
893 switch (bank->method) {
894 #ifdef CONFIG_ARCH_OMAP1
896 reg += OMAP_MPUIO_GPIO_MASKIT / bank->stride;
897 l = __raw_readl(reg);
904 #ifdef CONFIG_ARCH_OMAP15XX
905 case METHOD_GPIO_1510:
906 reg += OMAP1510_GPIO_INT_MASK;
907 l = __raw_readl(reg);
914 #ifdef CONFIG_ARCH_OMAP16XX
915 case METHOD_GPIO_1610:
917 reg += OMAP1610_GPIO_SET_IRQENABLE1;
919 reg += OMAP1610_GPIO_CLEAR_IRQENABLE1;
923 #if defined(CONFIG_ARCH_OMAP730) || defined(CONFIG_ARCH_OMAP850)
924 case METHOD_GPIO_7XX:
925 reg += OMAP7XX_GPIO_INT_MASK;
926 l = __raw_readl(reg);
933 #if defined(CONFIG_ARCH_OMAP2) || defined(CONFIG_ARCH_OMAP3)
934 case METHOD_GPIO_24XX:
936 reg += OMAP24XX_GPIO_SETIRQENABLE1;
938 reg += OMAP24XX_GPIO_CLEARIRQENABLE1;
942 #ifdef CONFIG_ARCH_OMAP4
943 case METHOD_GPIO_44XX:
945 reg += OMAP4_GPIO_IRQSTATUSSET0;
947 reg += OMAP4_GPIO_IRQSTATUSCLR0;
955 __raw_writel(l, reg);
958 static inline void _set_gpio_irqenable(struct gpio_bank *bank, int gpio, int enable)
960 _enable_gpio_irqbank(bank, 1 << get_gpio_index(gpio), enable);
964 * Note that ENAWAKEUP needs to be enabled in GPIO_SYSCONFIG register.
965 * 1510 does not seem to have a wake-up register. If JTAG is connected
966 * to the target, system will wake up always on GPIO events. While
967 * system is running all registered GPIO interrupts need to have wake-up
968 * enabled. When system is suspended, only selected GPIO interrupts need
969 * to have wake-up enabled.
971 static int _set_gpio_wakeup(struct gpio_bank *bank, int gpio, int enable)
973 unsigned long uninitialized_var(flags);
975 switch (bank->method) {
976 #ifdef CONFIG_ARCH_OMAP16XX
978 case METHOD_GPIO_1610:
979 spin_lock_irqsave(&bank->lock, flags);
981 bank->suspend_wakeup |= (1 << gpio);
983 bank->suspend_wakeup &= ~(1 << gpio);
984 spin_unlock_irqrestore(&bank->lock, flags);
987 #ifdef CONFIG_ARCH_OMAP2PLUS
988 case METHOD_GPIO_24XX:
989 case METHOD_GPIO_44XX:
990 if (bank->non_wakeup_gpios & (1 << gpio)) {
991 printk(KERN_ERR "Unable to modify wakeup on "
992 "non-wakeup GPIO%d\n",
993 (bank - gpio_bank) * 32 + gpio);
996 spin_lock_irqsave(&bank->lock, flags);
998 bank->suspend_wakeup |= (1 << gpio);
1000 bank->suspend_wakeup &= ~(1 << gpio);
1001 spin_unlock_irqrestore(&bank->lock, flags);
1005 printk(KERN_ERR "Can't enable GPIO wakeup for method %i\n",
1011 static void _reset_gpio(struct gpio_bank *bank, int gpio)
1013 _set_gpio_direction(bank, get_gpio_index(gpio), 1);
1014 _set_gpio_irqenable(bank, gpio, 0);
1015 _clear_gpio_irqstatus(bank, gpio);
1016 _set_gpio_triggering(bank, get_gpio_index(gpio), IRQ_TYPE_NONE);
1019 /* Use disable_irq_wake() and enable_irq_wake() functions from drivers */
1020 static int gpio_wake_enable(struct irq_data *d, unsigned int enable)
1022 unsigned int gpio = d->irq - IH_GPIO_BASE;
1023 struct gpio_bank *bank;
1026 if (check_gpio(gpio) < 0)
1028 bank = irq_data_get_irq_chip_data(d);
1029 retval = _set_gpio_wakeup(bank, get_gpio_index(gpio), enable);
1034 static int omap_gpio_request(struct gpio_chip *chip, unsigned offset)
1036 struct gpio_bank *bank = container_of(chip, struct gpio_bank, chip);
1037 unsigned long flags;
1039 spin_lock_irqsave(&bank->lock, flags);
1041 /* Set trigger to none. You need to enable the desired trigger with
1042 * request_irq() or set_irq_type().
1044 _set_gpio_triggering(bank, offset, IRQ_TYPE_NONE);
1046 #ifdef CONFIG_ARCH_OMAP15XX
1047 if (bank->method == METHOD_GPIO_1510) {
1050 /* Claim the pin for MPU */
1051 reg = bank->base + OMAP1510_GPIO_PIN_CONTROL;
1052 __raw_writel(__raw_readl(reg) | (1 << offset), reg);
1055 if (!cpu_class_is_omap1()) {
1056 if (!bank->mod_usage) {
1057 void __iomem *reg = bank->base;
1060 if (cpu_is_omap24xx() || cpu_is_omap34xx())
1061 reg += OMAP24XX_GPIO_CTRL;
1062 else if (cpu_is_omap44xx())
1063 reg += OMAP4_GPIO_CTRL;
1064 ctrl = __raw_readl(reg);
1065 /* Module is enabled, clocks are not gated */
1067 __raw_writel(ctrl, reg);
1069 bank->mod_usage |= 1 << offset;
1071 spin_unlock_irqrestore(&bank->lock, flags);
1076 static void omap_gpio_free(struct gpio_chip *chip, unsigned offset)
1078 struct gpio_bank *bank = container_of(chip, struct gpio_bank, chip);
1079 unsigned long flags;
1081 spin_lock_irqsave(&bank->lock, flags);
1082 #ifdef CONFIG_ARCH_OMAP16XX
1083 if (bank->method == METHOD_GPIO_1610) {
1084 /* Disable wake-up during idle for dynamic tick */
1085 void __iomem *reg = bank->base + OMAP1610_GPIO_CLEAR_WAKEUPENA;
1086 __raw_writel(1 << offset, reg);
1089 #if defined(CONFIG_ARCH_OMAP2) || defined(CONFIG_ARCH_OMAP3)
1090 if (bank->method == METHOD_GPIO_24XX) {
1091 /* Disable wake-up during idle for dynamic tick */
1092 void __iomem *reg = bank->base + OMAP24XX_GPIO_CLEARWKUENA;
1093 __raw_writel(1 << offset, reg);
1096 #ifdef CONFIG_ARCH_OMAP4
1097 if (bank->method == METHOD_GPIO_44XX) {
1098 /* Disable wake-up during idle for dynamic tick */
1099 void __iomem *reg = bank->base + OMAP4_GPIO_IRQWAKEN0;
1100 __raw_writel(1 << offset, reg);
1103 if (!cpu_class_is_omap1()) {
1104 bank->mod_usage &= ~(1 << offset);
1105 if (!bank->mod_usage) {
1106 void __iomem *reg = bank->base;
1109 if (cpu_is_omap24xx() || cpu_is_omap34xx())
1110 reg += OMAP24XX_GPIO_CTRL;
1111 else if (cpu_is_omap44xx())
1112 reg += OMAP4_GPIO_CTRL;
1113 ctrl = __raw_readl(reg);
1114 /* Module is disabled, clocks are gated */
1116 __raw_writel(ctrl, reg);
1119 _reset_gpio(bank, bank->chip.base + offset);
1120 spin_unlock_irqrestore(&bank->lock, flags);
1124 * We need to unmask the GPIO bank interrupt as soon as possible to
1125 * avoid missing GPIO interrupts for other lines in the bank.
1126 * Then we need to mask-read-clear-unmask the triggered GPIO lines
1127 * in the bank to avoid missing nested interrupts for a GPIO line.
1128 * If we wait to unmask individual GPIO lines in the bank after the
1129 * line's interrupt handler has been run, we may miss some nested
1132 static void gpio_irq_handler(unsigned int irq, struct irq_desc *desc)
1134 void __iomem *isr_reg = NULL;
1136 unsigned int gpio_irq, gpio_index;
1137 struct gpio_bank *bank;
1141 desc->irq_data.chip->irq_ack(&desc->irq_data);
1143 bank = irq_get_handler_data(irq);
1144 #ifdef CONFIG_ARCH_OMAP1
1145 if (bank->method == METHOD_MPUIO)
1146 isr_reg = bank->base +
1147 OMAP_MPUIO_GPIO_INT / bank->stride;
1149 #ifdef CONFIG_ARCH_OMAP15XX
1150 if (bank->method == METHOD_GPIO_1510)
1151 isr_reg = bank->base + OMAP1510_GPIO_INT_STATUS;
1153 #if defined(CONFIG_ARCH_OMAP16XX)
1154 if (bank->method == METHOD_GPIO_1610)
1155 isr_reg = bank->base + OMAP1610_GPIO_IRQSTATUS1;
1157 #if defined(CONFIG_ARCH_OMAP730) || defined(CONFIG_ARCH_OMAP850)
1158 if (bank->method == METHOD_GPIO_7XX)
1159 isr_reg = bank->base + OMAP7XX_GPIO_INT_STATUS;
1161 #if defined(CONFIG_ARCH_OMAP2) || defined(CONFIG_ARCH_OMAP3)
1162 if (bank->method == METHOD_GPIO_24XX)
1163 isr_reg = bank->base + OMAP24XX_GPIO_IRQSTATUS1;
1165 #if defined(CONFIG_ARCH_OMAP4)
1166 if (bank->method == METHOD_GPIO_44XX)
1167 isr_reg = bank->base + OMAP4_GPIO_IRQSTATUS0;
1170 if (WARN_ON(!isr_reg))
1174 u32 isr_saved, level_mask = 0;
1177 enabled = _get_gpio_irqbank_mask(bank);
1178 isr_saved = isr = __raw_readl(isr_reg) & enabled;
1180 if (cpu_is_omap15xx() && (bank->method == METHOD_MPUIO))
1183 if (cpu_class_is_omap2()) {
1184 level_mask = bank->level_mask & enabled;
1187 /* clear edge sensitive interrupts before handler(s) are
1188 called so that we don't miss any interrupt occurred while
1190 _enable_gpio_irqbank(bank, isr_saved & ~level_mask, 0);
1191 _clear_gpio_irqbank(bank, isr_saved & ~level_mask);
1192 _enable_gpio_irqbank(bank, isr_saved & ~level_mask, 1);
1194 /* if there is only edge sensitive GPIO pin interrupts
1195 configured, we could unmask GPIO bank interrupt immediately */
1196 if (!level_mask && !unmasked) {
1198 desc->irq_data.chip->irq_unmask(&desc->irq_data);
1206 gpio_irq = bank->virtual_irq_start;
1207 for (; isr != 0; isr >>= 1, gpio_irq++) {
1208 gpio_index = get_gpio_index(irq_to_gpio(gpio_irq));
1213 #ifdef CONFIG_ARCH_OMAP1
1215 * Some chips can't respond to both rising and falling
1216 * at the same time. If this irq was requested with
1217 * both flags, we need to flip the ICR data for the IRQ
1218 * to respond to the IRQ for the opposite direction.
1219 * This will be indicated in the bank toggle_mask.
1221 if (bank->toggle_mask & (1 << gpio_index))
1222 _toggle_gpio_edge_triggering(bank, gpio_index);
1225 generic_handle_irq(gpio_irq);
1228 /* if bank has any level sensitive GPIO pin interrupt
1229 configured, we must unmask the bank interrupt only after
1230 handler(s) are executed in order to avoid spurious bank
1234 desc->irq_data.chip->irq_unmask(&desc->irq_data);
1237 static void gpio_irq_shutdown(struct irq_data *d)
1239 unsigned int gpio = d->irq - IH_GPIO_BASE;
1240 struct gpio_bank *bank = irq_data_get_irq_chip_data(d);
1242 _reset_gpio(bank, gpio);
1245 static void gpio_ack_irq(struct irq_data *d)
1247 unsigned int gpio = d->irq - IH_GPIO_BASE;
1248 struct gpio_bank *bank = irq_data_get_irq_chip_data(d);
1250 _clear_gpio_irqstatus(bank, gpio);
1253 static void gpio_mask_irq(struct irq_data *d)
1255 unsigned int gpio = d->irq - IH_GPIO_BASE;
1256 struct gpio_bank *bank = irq_data_get_irq_chip_data(d);
1258 _set_gpio_irqenable(bank, gpio, 0);
1259 _set_gpio_triggering(bank, get_gpio_index(gpio), IRQ_TYPE_NONE);
1262 static void gpio_unmask_irq(struct irq_data *d)
1264 unsigned int gpio = d->irq - IH_GPIO_BASE;
1265 struct gpio_bank *bank = irq_data_get_irq_chip_data(d);
1266 unsigned int irq_mask = 1 << get_gpio_index(gpio);
1267 u32 trigger = irqd_get_trigger_type(d);
1270 _set_gpio_triggering(bank, get_gpio_index(gpio), trigger);
1272 /* For level-triggered GPIOs, the clearing must be done after
1273 * the HW source is cleared, thus after the handler has run */
1274 if (bank->level_mask & irq_mask) {
1275 _set_gpio_irqenable(bank, gpio, 0);
1276 _clear_gpio_irqstatus(bank, gpio);
1279 _set_gpio_irqenable(bank, gpio, 1);
1282 static struct irq_chip gpio_irq_chip = {
1284 .irq_shutdown = gpio_irq_shutdown,
1285 .irq_ack = gpio_ack_irq,
1286 .irq_mask = gpio_mask_irq,
1287 .irq_unmask = gpio_unmask_irq,
1288 .irq_set_type = gpio_irq_type,
1289 .irq_set_wake = gpio_wake_enable,
1292 /*---------------------------------------------------------------------*/
1294 #ifdef CONFIG_ARCH_OMAP1
1296 /* MPUIO uses the always-on 32k clock */
1298 static void mpuio_ack_irq(struct irq_data *d)
1300 /* The ISR is reset automatically, so do nothing here. */
1303 static void mpuio_mask_irq(struct irq_data *d)
1305 unsigned int gpio = OMAP_MPUIO(d->irq - IH_MPUIO_BASE);
1306 struct gpio_bank *bank = irq_data_get_irq_chip_data(d);
1308 _set_gpio_irqenable(bank, gpio, 0);
1311 static void mpuio_unmask_irq(struct irq_data *d)
1313 unsigned int gpio = OMAP_MPUIO(d->irq - IH_MPUIO_BASE);
1314 struct gpio_bank *bank = irq_data_get_irq_chip_data(d);
1316 _set_gpio_irqenable(bank, gpio, 1);
1319 static struct irq_chip mpuio_irq_chip = {
1321 .irq_ack = mpuio_ack_irq,
1322 .irq_mask = mpuio_mask_irq,
1323 .irq_unmask = mpuio_unmask_irq,
1324 .irq_set_type = gpio_irq_type,
1325 #ifdef CONFIG_ARCH_OMAP16XX
1326 /* REVISIT: assuming only 16xx supports MPUIO wake events */
1327 .irq_set_wake = gpio_wake_enable,
1332 #define bank_is_mpuio(bank) ((bank)->method == METHOD_MPUIO)
1335 #ifdef CONFIG_ARCH_OMAP16XX
1337 #include <linux/platform_device.h>
1339 static int omap_mpuio_suspend_noirq(struct device *dev)
1341 struct platform_device *pdev = to_platform_device(dev);
1342 struct gpio_bank *bank = platform_get_drvdata(pdev);
1343 void __iomem *mask_reg = bank->base +
1344 OMAP_MPUIO_GPIO_MASKIT / bank->stride;
1345 unsigned long flags;
1347 spin_lock_irqsave(&bank->lock, flags);
1348 bank->saved_wakeup = __raw_readl(mask_reg);
1349 __raw_writel(0xffff & ~bank->suspend_wakeup, mask_reg);
1350 spin_unlock_irqrestore(&bank->lock, flags);
1355 static int omap_mpuio_resume_noirq(struct device *dev)
1357 struct platform_device *pdev = to_platform_device(dev);
1358 struct gpio_bank *bank = platform_get_drvdata(pdev);
1359 void __iomem *mask_reg = bank->base +
1360 OMAP_MPUIO_GPIO_MASKIT / bank->stride;
1361 unsigned long flags;
1363 spin_lock_irqsave(&bank->lock, flags);
1364 __raw_writel(bank->saved_wakeup, mask_reg);
1365 spin_unlock_irqrestore(&bank->lock, flags);
1370 static const struct dev_pm_ops omap_mpuio_dev_pm_ops = {
1371 .suspend_noirq = omap_mpuio_suspend_noirq,
1372 .resume_noirq = omap_mpuio_resume_noirq,
1375 /* use platform_driver for this. */
1376 static struct platform_driver omap_mpuio_driver = {
1379 .pm = &omap_mpuio_dev_pm_ops,
1383 static struct platform_device omap_mpuio_device = {
1387 .driver = &omap_mpuio_driver.driver,
1389 /* could list the /proc/iomem resources */
1392 static inline void mpuio_init(void)
1394 struct gpio_bank *bank = get_gpio_bank(OMAP_MPUIO(0));
1395 platform_set_drvdata(&omap_mpuio_device, bank);
1397 if (platform_driver_register(&omap_mpuio_driver) == 0)
1398 (void) platform_device_register(&omap_mpuio_device);
1402 static inline void mpuio_init(void) {}
1407 extern struct irq_chip mpuio_irq_chip;
1409 #define bank_is_mpuio(bank) 0
1410 static inline void mpuio_init(void) {}
1414 /*---------------------------------------------------------------------*/
1416 /* REVISIT these are stupid implementations! replace by ones that
1417 * don't switch on METHOD_* and which mostly avoid spinlocks
1420 static int gpio_input(struct gpio_chip *chip, unsigned offset)
1422 struct gpio_bank *bank;
1423 unsigned long flags;
1425 bank = container_of(chip, struct gpio_bank, chip);
1426 spin_lock_irqsave(&bank->lock, flags);
1427 _set_gpio_direction(bank, offset, 1);
1428 spin_unlock_irqrestore(&bank->lock, flags);
1432 static int gpio_is_input(struct gpio_bank *bank, int mask)
1434 void __iomem *reg = bank->base;
1436 switch (bank->method) {
1438 reg += OMAP_MPUIO_IO_CNTL / bank->stride;
1440 case METHOD_GPIO_1510:
1441 reg += OMAP1510_GPIO_DIR_CONTROL;
1443 case METHOD_GPIO_1610:
1444 reg += OMAP1610_GPIO_DIRECTION;
1446 case METHOD_GPIO_7XX:
1447 reg += OMAP7XX_GPIO_DIR_CONTROL;
1449 case METHOD_GPIO_24XX:
1450 reg += OMAP24XX_GPIO_OE;
1452 case METHOD_GPIO_44XX:
1453 reg += OMAP4_GPIO_OE;
1456 WARN_ONCE(1, "gpio_is_input: incorrect OMAP GPIO method");
1459 return __raw_readl(reg) & mask;
1462 static int gpio_get(struct gpio_chip *chip, unsigned offset)
1464 struct gpio_bank *bank;
1469 gpio = chip->base + offset;
1470 bank = get_gpio_bank(gpio);
1472 mask = 1 << get_gpio_index(gpio);
1474 if (gpio_is_input(bank, mask))
1475 return _get_gpio_datain(bank, gpio);
1477 return _get_gpio_dataout(bank, gpio);
1480 static int gpio_output(struct gpio_chip *chip, unsigned offset, int value)
1482 struct gpio_bank *bank;
1483 unsigned long flags;
1485 bank = container_of(chip, struct gpio_bank, chip);
1486 spin_lock_irqsave(&bank->lock, flags);
1487 _set_gpio_dataout(bank, offset, value);
1488 _set_gpio_direction(bank, offset, 0);
1489 spin_unlock_irqrestore(&bank->lock, flags);
1493 static int gpio_debounce(struct gpio_chip *chip, unsigned offset,
1496 struct gpio_bank *bank;
1497 unsigned long flags;
1499 bank = container_of(chip, struct gpio_bank, chip);
1502 bank->dbck = clk_get(bank->dev, "dbclk");
1503 if (IS_ERR(bank->dbck))
1504 dev_err(bank->dev, "Could not get gpio dbck\n");
1507 spin_lock_irqsave(&bank->lock, flags);
1508 _set_gpio_debounce(bank, offset, debounce);
1509 spin_unlock_irqrestore(&bank->lock, flags);
1514 static void gpio_set(struct gpio_chip *chip, unsigned offset, int value)
1516 struct gpio_bank *bank;
1517 unsigned long flags;
1519 bank = container_of(chip, struct gpio_bank, chip);
1520 spin_lock_irqsave(&bank->lock, flags);
1521 _set_gpio_dataout(bank, offset, value);
1522 spin_unlock_irqrestore(&bank->lock, flags);
1525 static int gpio_2irq(struct gpio_chip *chip, unsigned offset)
1527 struct gpio_bank *bank;
1529 bank = container_of(chip, struct gpio_bank, chip);
1530 return bank->virtual_irq_start + offset;
1533 /*---------------------------------------------------------------------*/
1535 static void __init omap_gpio_show_rev(struct gpio_bank *bank)
1539 if (cpu_is_omap16xx() && !(bank->method != METHOD_MPUIO))
1540 rev = __raw_readw(bank->base + OMAP1610_GPIO_REVISION);
1541 else if (cpu_is_omap24xx() || cpu_is_omap34xx())
1542 rev = __raw_readl(bank->base + OMAP24XX_GPIO_REVISION);
1543 else if (cpu_is_omap44xx())
1544 rev = __raw_readl(bank->base + OMAP4_GPIO_REVISION);
1548 printk(KERN_INFO "OMAP GPIO hardware version %d.%d\n",
1549 (rev >> 4) & 0x0f, rev & 0x0f);
1552 /* This lock class tells lockdep that GPIO irqs are in a different
1553 * category than their parents, so it won't report false recursion.
1555 static struct lock_class_key gpio_lock_class;
1557 static inline int init_gpio_info(struct platform_device *pdev)
1559 /* TODO: Analyze removing gpio_bank_count usage from driver code */
1560 gpio_bank = kzalloc(gpio_bank_count * sizeof(struct gpio_bank),
1563 dev_err(&pdev->dev, "Memory alloc failed for gpio_bank\n");
1569 /* TODO: Cleanup cpu_is_* checks */
1570 static void omap_gpio_mod_init(struct gpio_bank *bank, int id)
1572 if (cpu_class_is_omap2()) {
1573 if (cpu_is_omap44xx()) {
1574 __raw_writel(0xffffffff, bank->base +
1575 OMAP4_GPIO_IRQSTATUSCLR0);
1576 __raw_writel(0x00000000, bank->base +
1577 OMAP4_GPIO_DEBOUNCENABLE);
1578 /* Initialize interface clk ungated, module enabled */
1579 __raw_writel(0, bank->base + OMAP4_GPIO_CTRL);
1580 } else if (cpu_is_omap34xx()) {
1581 __raw_writel(0x00000000, bank->base +
1582 OMAP24XX_GPIO_IRQENABLE1);
1583 __raw_writel(0xffffffff, bank->base +
1584 OMAP24XX_GPIO_IRQSTATUS1);
1585 __raw_writel(0x00000000, bank->base +
1586 OMAP24XX_GPIO_DEBOUNCE_EN);
1588 /* Initialize interface clk ungated, module enabled */
1589 __raw_writel(0, bank->base + OMAP24XX_GPIO_CTRL);
1590 } else if (cpu_is_omap24xx()) {
1591 static const u32 non_wakeup_gpios[] = {
1592 0xe203ffc0, 0x08700040
1594 if (id < ARRAY_SIZE(non_wakeup_gpios))
1595 bank->non_wakeup_gpios = non_wakeup_gpios[id];
1597 } else if (cpu_class_is_omap1()) {
1598 if (bank_is_mpuio(bank))
1599 __raw_writew(0xffff, bank->base +
1600 OMAP_MPUIO_GPIO_MASKIT / bank->stride);
1601 if (cpu_is_omap15xx() && bank->method == METHOD_GPIO_1510) {
1602 __raw_writew(0xffff, bank->base
1603 + OMAP1510_GPIO_INT_MASK);
1604 __raw_writew(0x0000, bank->base
1605 + OMAP1510_GPIO_INT_STATUS);
1607 if (cpu_is_omap16xx() && bank->method == METHOD_GPIO_1610) {
1608 __raw_writew(0x0000, bank->base
1609 + OMAP1610_GPIO_IRQENABLE1);
1610 __raw_writew(0xffff, bank->base
1611 + OMAP1610_GPIO_IRQSTATUS1);
1612 __raw_writew(0x0014, bank->base
1613 + OMAP1610_GPIO_SYSCONFIG);
1616 * Enable system clock for GPIO module.
1617 * The CAM_CLK_CTRL *is* really the right place.
1619 omap_writel(omap_readl(ULPD_CAM_CLK_CTRL) | 0x04,
1622 if (cpu_is_omap7xx() && bank->method == METHOD_GPIO_7XX) {
1623 __raw_writel(0xffffffff, bank->base
1624 + OMAP7XX_GPIO_INT_MASK);
1625 __raw_writel(0x00000000, bank->base
1626 + OMAP7XX_GPIO_INT_STATUS);
1631 static void __init omap_gpio_chip_init(struct gpio_bank *bank)
1636 bank->mod_usage = 0;
1638 * REVISIT eventually switch from OMAP-specific gpio structs
1639 * over to the generic ones
1641 bank->chip.request = omap_gpio_request;
1642 bank->chip.free = omap_gpio_free;
1643 bank->chip.direction_input = gpio_input;
1644 bank->chip.get = gpio_get;
1645 bank->chip.direction_output = gpio_output;
1646 bank->chip.set_debounce = gpio_debounce;
1647 bank->chip.set = gpio_set;
1648 bank->chip.to_irq = gpio_2irq;
1649 if (bank_is_mpuio(bank)) {
1650 bank->chip.label = "mpuio";
1651 #ifdef CONFIG_ARCH_OMAP16XX
1652 bank->chip.dev = &omap_mpuio_device.dev;
1654 bank->chip.base = OMAP_MPUIO(0);
1656 bank->chip.label = "gpio";
1657 bank->chip.base = gpio;
1660 bank->chip.ngpio = bank_width;
1662 gpiochip_add(&bank->chip);
1664 for (j = bank->virtual_irq_start;
1665 j < bank->virtual_irq_start + bank_width; j++) {
1666 irq_set_lockdep_class(j, &gpio_lock_class);
1667 irq_set_chip_data(j, bank);
1668 if (bank_is_mpuio(bank))
1669 irq_set_chip(j, &mpuio_irq_chip);
1671 irq_set_chip(j, &gpio_irq_chip);
1672 irq_set_handler(j, handle_simple_irq);
1673 set_irq_flags(j, IRQF_VALID);
1675 irq_set_chained_handler(bank->irq, gpio_irq_handler);
1676 irq_set_handler_data(bank->irq, bank);
1679 static int __devinit omap_gpio_probe(struct platform_device *pdev)
1681 static int gpio_init_done;
1682 struct omap_gpio_platform_data *pdata;
1683 struct resource *res;
1685 struct gpio_bank *bank;
1687 if (!pdev->dev.platform_data)
1690 pdata = pdev->dev.platform_data;
1692 if (!gpio_init_done) {
1695 ret = init_gpio_info(pdev);
1701 bank = &gpio_bank[id];
1703 res = platform_get_resource(pdev, IORESOURCE_IRQ, 0);
1704 if (unlikely(!res)) {
1705 dev_err(&pdev->dev, "GPIO Bank %i Invalid IRQ resource\n", id);
1709 bank->irq = res->start;
1710 bank->virtual_irq_start = pdata->virtual_irq_start;
1711 bank->method = pdata->bank_type;
1712 bank->dev = &pdev->dev;
1713 bank->dbck_flag = pdata->dbck_flag;
1714 bank->stride = pdata->bank_stride;
1715 bank_width = pdata->bank_width;
1717 spin_lock_init(&bank->lock);
1719 /* Static mapping, never released */
1720 res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
1721 if (unlikely(!res)) {
1722 dev_err(&pdev->dev, "GPIO Bank %i Invalid mem resource\n", id);
1726 bank->base = ioremap(res->start, resource_size(res));
1728 dev_err(&pdev->dev, "Could not ioremap gpio bank%i\n", id);
1732 pm_runtime_enable(bank->dev);
1733 pm_runtime_get_sync(bank->dev);
1735 omap_gpio_mod_init(bank, id);
1736 omap_gpio_chip_init(bank);
1737 omap_gpio_show_rev(bank);
1739 if (!gpio_init_done)
1745 #if defined(CONFIG_ARCH_OMAP16XX) || defined(CONFIG_ARCH_OMAP2PLUS)
1746 static int omap_gpio_suspend(void)
1750 if (!cpu_class_is_omap2() && !cpu_is_omap16xx())
1753 for (i = 0; i < gpio_bank_count; i++) {
1754 struct gpio_bank *bank = &gpio_bank[i];
1755 void __iomem *wake_status;
1756 void __iomem *wake_clear;
1757 void __iomem *wake_set;
1758 unsigned long flags;
1760 switch (bank->method) {
1761 #ifdef CONFIG_ARCH_OMAP16XX
1762 case METHOD_GPIO_1610:
1763 wake_status = bank->base + OMAP1610_GPIO_WAKEUPENABLE;
1764 wake_clear = bank->base + OMAP1610_GPIO_CLEAR_WAKEUPENA;
1765 wake_set = bank->base + OMAP1610_GPIO_SET_WAKEUPENA;
1768 #if defined(CONFIG_ARCH_OMAP2) || defined(CONFIG_ARCH_OMAP3)
1769 case METHOD_GPIO_24XX:
1770 wake_status = bank->base + OMAP24XX_GPIO_WAKE_EN;
1771 wake_clear = bank->base + OMAP24XX_GPIO_CLEARWKUENA;
1772 wake_set = bank->base + OMAP24XX_GPIO_SETWKUENA;
1775 #ifdef CONFIG_ARCH_OMAP4
1776 case METHOD_GPIO_44XX:
1777 wake_status = bank->base + OMAP4_GPIO_IRQWAKEN0;
1778 wake_clear = bank->base + OMAP4_GPIO_IRQWAKEN0;
1779 wake_set = bank->base + OMAP4_GPIO_IRQWAKEN0;
1786 spin_lock_irqsave(&bank->lock, flags);
1787 bank->saved_wakeup = __raw_readl(wake_status);
1788 __raw_writel(0xffffffff, wake_clear);
1789 __raw_writel(bank->suspend_wakeup, wake_set);
1790 spin_unlock_irqrestore(&bank->lock, flags);
1796 static void omap_gpio_resume(void)
1800 if (!cpu_class_is_omap2() && !cpu_is_omap16xx())
1803 for (i = 0; i < gpio_bank_count; i++) {
1804 struct gpio_bank *bank = &gpio_bank[i];
1805 void __iomem *wake_clear;
1806 void __iomem *wake_set;
1807 unsigned long flags;
1809 switch (bank->method) {
1810 #ifdef CONFIG_ARCH_OMAP16XX
1811 case METHOD_GPIO_1610:
1812 wake_clear = bank->base + OMAP1610_GPIO_CLEAR_WAKEUPENA;
1813 wake_set = bank->base + OMAP1610_GPIO_SET_WAKEUPENA;
1816 #if defined(CONFIG_ARCH_OMAP2) || defined(CONFIG_ARCH_OMAP3)
1817 case METHOD_GPIO_24XX:
1818 wake_clear = bank->base + OMAP24XX_GPIO_CLEARWKUENA;
1819 wake_set = bank->base + OMAP24XX_GPIO_SETWKUENA;
1822 #ifdef CONFIG_ARCH_OMAP4
1823 case METHOD_GPIO_44XX:
1824 wake_clear = bank->base + OMAP4_GPIO_IRQWAKEN0;
1825 wake_set = bank->base + OMAP4_GPIO_IRQWAKEN0;
1832 spin_lock_irqsave(&bank->lock, flags);
1833 __raw_writel(0xffffffff, wake_clear);
1834 __raw_writel(bank->saved_wakeup, wake_set);
1835 spin_unlock_irqrestore(&bank->lock, flags);
1839 static struct syscore_ops omap_gpio_syscore_ops = {
1840 .suspend = omap_gpio_suspend,
1841 .resume = omap_gpio_resume,
1846 #ifdef CONFIG_ARCH_OMAP2PLUS
1848 static int workaround_enabled;
1850 void omap2_gpio_prepare_for_idle(int off_mode)
1855 if (cpu_is_omap34xx())
1858 for (i = min; i < gpio_bank_count; i++) {
1859 struct gpio_bank *bank = &gpio_bank[i];
1863 for (j = 0; j < hweight_long(bank->dbck_enable_mask); j++)
1864 clk_disable(bank->dbck);
1869 /* If going to OFF, remove triggering for all
1870 * non-wakeup GPIOs. Otherwise spurious IRQs will be
1871 * generated. See OMAP2420 Errata item 1.101. */
1872 if (!(bank->enabled_non_wakeup_gpios))
1875 if (cpu_is_omap24xx() || cpu_is_omap34xx()) {
1876 bank->saved_datain = __raw_readl(bank->base +
1877 OMAP24XX_GPIO_DATAIN);
1878 l1 = __raw_readl(bank->base +
1879 OMAP24XX_GPIO_FALLINGDETECT);
1880 l2 = __raw_readl(bank->base +
1881 OMAP24XX_GPIO_RISINGDETECT);
1884 if (cpu_is_omap44xx()) {
1885 bank->saved_datain = __raw_readl(bank->base +
1887 l1 = __raw_readl(bank->base +
1888 OMAP4_GPIO_FALLINGDETECT);
1889 l2 = __raw_readl(bank->base +
1890 OMAP4_GPIO_RISINGDETECT);
1893 bank->saved_fallingdetect = l1;
1894 bank->saved_risingdetect = l2;
1895 l1 &= ~bank->enabled_non_wakeup_gpios;
1896 l2 &= ~bank->enabled_non_wakeup_gpios;
1898 if (cpu_is_omap24xx() || cpu_is_omap34xx()) {
1899 __raw_writel(l1, bank->base +
1900 OMAP24XX_GPIO_FALLINGDETECT);
1901 __raw_writel(l2, bank->base +
1902 OMAP24XX_GPIO_RISINGDETECT);
1905 if (cpu_is_omap44xx()) {
1906 __raw_writel(l1, bank->base + OMAP4_GPIO_FALLINGDETECT);
1907 __raw_writel(l2, bank->base + OMAP4_GPIO_RISINGDETECT);
1913 workaround_enabled = 0;
1916 workaround_enabled = 1;
1919 void omap2_gpio_resume_after_idle(void)
1924 if (cpu_is_omap34xx())
1926 for (i = min; i < gpio_bank_count; i++) {
1927 struct gpio_bank *bank = &gpio_bank[i];
1928 u32 l = 0, gen, gen0, gen1;
1931 for (j = 0; j < hweight_long(bank->dbck_enable_mask); j++)
1932 clk_enable(bank->dbck);
1934 if (!workaround_enabled)
1937 if (!(bank->enabled_non_wakeup_gpios))
1940 if (cpu_is_omap24xx() || cpu_is_omap34xx()) {
1941 __raw_writel(bank->saved_fallingdetect,
1942 bank->base + OMAP24XX_GPIO_FALLINGDETECT);
1943 __raw_writel(bank->saved_risingdetect,
1944 bank->base + OMAP24XX_GPIO_RISINGDETECT);
1945 l = __raw_readl(bank->base + OMAP24XX_GPIO_DATAIN);
1948 if (cpu_is_omap44xx()) {
1949 __raw_writel(bank->saved_fallingdetect,
1950 bank->base + OMAP4_GPIO_FALLINGDETECT);
1951 __raw_writel(bank->saved_risingdetect,
1952 bank->base + OMAP4_GPIO_RISINGDETECT);
1953 l = __raw_readl(bank->base + OMAP4_GPIO_DATAIN);
1956 /* Check if any of the non-wakeup interrupt GPIOs have changed
1957 * state. If so, generate an IRQ by software. This is
1958 * horribly racy, but it's the best we can do to work around
1959 * this silicon bug. */
1960 l ^= bank->saved_datain;
1961 l &= bank->enabled_non_wakeup_gpios;
1964 * No need to generate IRQs for the rising edge for gpio IRQs
1965 * configured with falling edge only; and vice versa.
1967 gen0 = l & bank->saved_fallingdetect;
1968 gen0 &= bank->saved_datain;
1970 gen1 = l & bank->saved_risingdetect;
1971 gen1 &= ~(bank->saved_datain);
1973 /* FIXME: Consider GPIO IRQs with level detections properly! */
1974 gen = l & (~(bank->saved_fallingdetect) &
1975 ~(bank->saved_risingdetect));
1976 /* Consider all GPIO IRQs needed to be updated */
1982 if (cpu_is_omap24xx() || cpu_is_omap34xx()) {
1983 old0 = __raw_readl(bank->base +
1984 OMAP24XX_GPIO_LEVELDETECT0);
1985 old1 = __raw_readl(bank->base +
1986 OMAP24XX_GPIO_LEVELDETECT1);
1987 __raw_writel(old0 | gen, bank->base +
1988 OMAP24XX_GPIO_LEVELDETECT0);
1989 __raw_writel(old1 | gen, bank->base +
1990 OMAP24XX_GPIO_LEVELDETECT1);
1991 __raw_writel(old0, bank->base +
1992 OMAP24XX_GPIO_LEVELDETECT0);
1993 __raw_writel(old1, bank->base +
1994 OMAP24XX_GPIO_LEVELDETECT1);
1997 if (cpu_is_omap44xx()) {
1998 old0 = __raw_readl(bank->base +
1999 OMAP4_GPIO_LEVELDETECT0);
2000 old1 = __raw_readl(bank->base +
2001 OMAP4_GPIO_LEVELDETECT1);
2002 __raw_writel(old0 | l, bank->base +
2003 OMAP4_GPIO_LEVELDETECT0);
2004 __raw_writel(old1 | l, bank->base +
2005 OMAP4_GPIO_LEVELDETECT1);
2006 __raw_writel(old0, bank->base +
2007 OMAP4_GPIO_LEVELDETECT0);
2008 __raw_writel(old1, bank->base +
2009 OMAP4_GPIO_LEVELDETECT1);
2018 #ifdef CONFIG_ARCH_OMAP3
2019 /* save the registers of bank 2-6 */
2020 void omap_gpio_save_context(void)
2024 /* saving banks from 2-6 only since GPIO1 is in WKUP */
2025 for (i = 1; i < gpio_bank_count; i++) {
2026 struct gpio_bank *bank = &gpio_bank[i];
2027 gpio_context[i].irqenable1 =
2028 __raw_readl(bank->base + OMAP24XX_GPIO_IRQENABLE1);
2029 gpio_context[i].irqenable2 =
2030 __raw_readl(bank->base + OMAP24XX_GPIO_IRQENABLE2);
2031 gpio_context[i].wake_en =
2032 __raw_readl(bank->base + OMAP24XX_GPIO_WAKE_EN);
2033 gpio_context[i].ctrl =
2034 __raw_readl(bank->base + OMAP24XX_GPIO_CTRL);
2035 gpio_context[i].oe =
2036 __raw_readl(bank->base + OMAP24XX_GPIO_OE);
2037 gpio_context[i].leveldetect0 =
2038 __raw_readl(bank->base + OMAP24XX_GPIO_LEVELDETECT0);
2039 gpio_context[i].leveldetect1 =
2040 __raw_readl(bank->base + OMAP24XX_GPIO_LEVELDETECT1);
2041 gpio_context[i].risingdetect =
2042 __raw_readl(bank->base + OMAP24XX_GPIO_RISINGDETECT);
2043 gpio_context[i].fallingdetect =
2044 __raw_readl(bank->base + OMAP24XX_GPIO_FALLINGDETECT);
2045 gpio_context[i].dataout =
2046 __raw_readl(bank->base + OMAP24XX_GPIO_DATAOUT);
2050 /* restore the required registers of bank 2-6 */
2051 void omap_gpio_restore_context(void)
2055 for (i = 1; i < gpio_bank_count; i++) {
2056 struct gpio_bank *bank = &gpio_bank[i];
2057 __raw_writel(gpio_context[i].irqenable1,
2058 bank->base + OMAP24XX_GPIO_IRQENABLE1);
2059 __raw_writel(gpio_context[i].irqenable2,
2060 bank->base + OMAP24XX_GPIO_IRQENABLE2);
2061 __raw_writel(gpio_context[i].wake_en,
2062 bank->base + OMAP24XX_GPIO_WAKE_EN);
2063 __raw_writel(gpio_context[i].ctrl,
2064 bank->base + OMAP24XX_GPIO_CTRL);
2065 __raw_writel(gpio_context[i].oe,
2066 bank->base + OMAP24XX_GPIO_OE);
2067 __raw_writel(gpio_context[i].leveldetect0,
2068 bank->base + OMAP24XX_GPIO_LEVELDETECT0);
2069 __raw_writel(gpio_context[i].leveldetect1,
2070 bank->base + OMAP24XX_GPIO_LEVELDETECT1);
2071 __raw_writel(gpio_context[i].risingdetect,
2072 bank->base + OMAP24XX_GPIO_RISINGDETECT);
2073 __raw_writel(gpio_context[i].fallingdetect,
2074 bank->base + OMAP24XX_GPIO_FALLINGDETECT);
2075 __raw_writel(gpio_context[i].dataout,
2076 bank->base + OMAP24XX_GPIO_DATAOUT);
2081 static struct platform_driver omap_gpio_driver = {
2082 .probe = omap_gpio_probe,
2084 .name = "omap_gpio",
2089 * gpio driver register needs to be done before
2090 * machine_init functions access gpio APIs.
2091 * Hence omap_gpio_drv_reg() is a postcore_initcall.
2093 static int __init omap_gpio_drv_reg(void)
2095 return platform_driver_register(&omap_gpio_driver);
2097 postcore_initcall(omap_gpio_drv_reg);
2099 static int __init omap_gpio_sysinit(void)
2103 #if defined(CONFIG_ARCH_OMAP16XX) || defined(CONFIG_ARCH_OMAP2PLUS)
2104 if (cpu_is_omap16xx() || cpu_class_is_omap2())
2105 register_syscore_ops(&omap_gpio_syscore_ops);
2111 arch_initcall(omap_gpio_sysinit);