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/sysdev.h>
21 #include <linux/err.h>
22 #include <linux/clk.h>
25 #include <mach/hardware.h>
27 #include <mach/irqs.h>
28 #include <mach/gpio.h>
29 #include <asm/mach/irq.h>
30 #include <plat/powerdomain.h>
33 * OMAP1510 GPIO registers
35 #define OMAP1510_GPIO_BASE 0xfffce000
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_GPIO1_BASE 0xfffbe400
50 #define OMAP1610_GPIO2_BASE 0xfffbec00
51 #define OMAP1610_GPIO3_BASE 0xfffbb400
52 #define OMAP1610_GPIO4_BASE 0xfffbbc00
53 #define OMAP1610_GPIO_REVISION 0x0000
54 #define OMAP1610_GPIO_SYSCONFIG 0x0010
55 #define OMAP1610_GPIO_SYSSTATUS 0x0014
56 #define OMAP1610_GPIO_IRQSTATUS1 0x0018
57 #define OMAP1610_GPIO_IRQENABLE1 0x001c
58 #define OMAP1610_GPIO_WAKEUPENABLE 0x0028
59 #define OMAP1610_GPIO_DATAIN 0x002c
60 #define OMAP1610_GPIO_DATAOUT 0x0030
61 #define OMAP1610_GPIO_DIRECTION 0x0034
62 #define OMAP1610_GPIO_EDGE_CTRL1 0x0038
63 #define OMAP1610_GPIO_EDGE_CTRL2 0x003c
64 #define OMAP1610_GPIO_CLEAR_IRQENABLE1 0x009c
65 #define OMAP1610_GPIO_CLEAR_WAKEUPENA 0x00a8
66 #define OMAP1610_GPIO_CLEAR_DATAOUT 0x00b0
67 #define OMAP1610_GPIO_SET_IRQENABLE1 0x00dc
68 #define OMAP1610_GPIO_SET_WAKEUPENA 0x00e8
69 #define OMAP1610_GPIO_SET_DATAOUT 0x00f0
72 * OMAP7XX specific GPIO registers
74 #define OMAP7XX_GPIO1_BASE 0xfffbc000
75 #define OMAP7XX_GPIO2_BASE 0xfffbc800
76 #define OMAP7XX_GPIO3_BASE 0xfffbd000
77 #define OMAP7XX_GPIO4_BASE 0xfffbd800
78 #define OMAP7XX_GPIO5_BASE 0xfffbe000
79 #define OMAP7XX_GPIO6_BASE 0xfffbe800
80 #define OMAP7XX_GPIO_DATA_INPUT 0x00
81 #define OMAP7XX_GPIO_DATA_OUTPUT 0x04
82 #define OMAP7XX_GPIO_DIR_CONTROL 0x08
83 #define OMAP7XX_GPIO_INT_CONTROL 0x0c
84 #define OMAP7XX_GPIO_INT_MASK 0x10
85 #define OMAP7XX_GPIO_INT_STATUS 0x14
87 #define OMAP1_MPUIO_VBASE OMAP1_MPUIO_BASE
90 * omap24xx specific GPIO registers
92 #define OMAP242X_GPIO1_BASE 0x48018000
93 #define OMAP242X_GPIO2_BASE 0x4801a000
94 #define OMAP242X_GPIO3_BASE 0x4801c000
95 #define OMAP242X_GPIO4_BASE 0x4801e000
97 #define OMAP243X_GPIO1_BASE 0x4900C000
98 #define OMAP243X_GPIO2_BASE 0x4900E000
99 #define OMAP243X_GPIO3_BASE 0x49010000
100 #define OMAP243X_GPIO4_BASE 0x49012000
101 #define OMAP243X_GPIO5_BASE 0x480B6000
103 #define OMAP24XX_GPIO_REVISION 0x0000
104 #define OMAP24XX_GPIO_SYSCONFIG 0x0010
105 #define OMAP24XX_GPIO_SYSSTATUS 0x0014
106 #define OMAP24XX_GPIO_IRQSTATUS1 0x0018
107 #define OMAP24XX_GPIO_IRQSTATUS2 0x0028
108 #define OMAP24XX_GPIO_IRQENABLE2 0x002c
109 #define OMAP24XX_GPIO_IRQENABLE1 0x001c
110 #define OMAP24XX_GPIO_WAKE_EN 0x0020
111 #define OMAP24XX_GPIO_CTRL 0x0030
112 #define OMAP24XX_GPIO_OE 0x0034
113 #define OMAP24XX_GPIO_DATAIN 0x0038
114 #define OMAP24XX_GPIO_DATAOUT 0x003c
115 #define OMAP24XX_GPIO_LEVELDETECT0 0x0040
116 #define OMAP24XX_GPIO_LEVELDETECT1 0x0044
117 #define OMAP24XX_GPIO_RISINGDETECT 0x0048
118 #define OMAP24XX_GPIO_FALLINGDETECT 0x004c
119 #define OMAP24XX_GPIO_DEBOUNCE_EN 0x0050
120 #define OMAP24XX_GPIO_DEBOUNCE_VAL 0x0054
121 #define OMAP24XX_GPIO_CLEARIRQENABLE1 0x0060
122 #define OMAP24XX_GPIO_SETIRQENABLE1 0x0064
123 #define OMAP24XX_GPIO_CLEARWKUENA 0x0080
124 #define OMAP24XX_GPIO_SETWKUENA 0x0084
125 #define OMAP24XX_GPIO_CLEARDATAOUT 0x0090
126 #define OMAP24XX_GPIO_SETDATAOUT 0x0094
128 #define OMAP4_GPIO_REVISION 0x0000
129 #define OMAP4_GPIO_SYSCONFIG 0x0010
130 #define OMAP4_GPIO_EOI 0x0020
131 #define OMAP4_GPIO_IRQSTATUSRAW0 0x0024
132 #define OMAP4_GPIO_IRQSTATUSRAW1 0x0028
133 #define OMAP4_GPIO_IRQSTATUS0 0x002c
134 #define OMAP4_GPIO_IRQSTATUS1 0x0030
135 #define OMAP4_GPIO_IRQSTATUSSET0 0x0034
136 #define OMAP4_GPIO_IRQSTATUSSET1 0x0038
137 #define OMAP4_GPIO_IRQSTATUSCLR0 0x003c
138 #define OMAP4_GPIO_IRQSTATUSCLR1 0x0040
139 #define OMAP4_GPIO_IRQWAKEN0 0x0044
140 #define OMAP4_GPIO_IRQWAKEN1 0x0048
141 #define OMAP4_GPIO_SYSSTATUS 0x0114
142 #define OMAP4_GPIO_IRQENABLE1 0x011c
143 #define OMAP4_GPIO_WAKE_EN 0x0120
144 #define OMAP4_GPIO_IRQSTATUS2 0x0128
145 #define OMAP4_GPIO_IRQENABLE2 0x012c
146 #define OMAP4_GPIO_CTRL 0x0130
147 #define OMAP4_GPIO_OE 0x0134
148 #define OMAP4_GPIO_DATAIN 0x0138
149 #define OMAP4_GPIO_DATAOUT 0x013c
150 #define OMAP4_GPIO_LEVELDETECT0 0x0140
151 #define OMAP4_GPIO_LEVELDETECT1 0x0144
152 #define OMAP4_GPIO_RISINGDETECT 0x0148
153 #define OMAP4_GPIO_FALLINGDETECT 0x014c
154 #define OMAP4_GPIO_DEBOUNCENABLE 0x0150
155 #define OMAP4_GPIO_DEBOUNCINGTIME 0x0154
156 #define OMAP4_GPIO_CLEARIRQENABLE1 0x0160
157 #define OMAP4_GPIO_SETIRQENABLE1 0x0164
158 #define OMAP4_GPIO_CLEARWKUENA 0x0180
159 #define OMAP4_GPIO_SETWKUENA 0x0184
160 #define OMAP4_GPIO_CLEARDATAOUT 0x0190
161 #define OMAP4_GPIO_SETDATAOUT 0x0194
163 * omap34xx specific GPIO registers
166 #define OMAP34XX_GPIO1_BASE 0x48310000
167 #define OMAP34XX_GPIO2_BASE 0x49050000
168 #define OMAP34XX_GPIO3_BASE 0x49052000
169 #define OMAP34XX_GPIO4_BASE 0x49054000
170 #define OMAP34XX_GPIO5_BASE 0x49056000
171 #define OMAP34XX_GPIO6_BASE 0x49058000
174 * OMAP44XX specific GPIO registers
176 #define OMAP44XX_GPIO1_BASE 0x4a310000
177 #define OMAP44XX_GPIO2_BASE 0x48055000
178 #define OMAP44XX_GPIO3_BASE 0x48057000
179 #define OMAP44XX_GPIO4_BASE 0x48059000
180 #define OMAP44XX_GPIO5_BASE 0x4805B000
181 #define OMAP44XX_GPIO6_BASE 0x4805D000
187 u16 virtual_irq_start;
189 #if defined(CONFIG_ARCH_OMAP16XX) || defined(CONFIG_ARCH_OMAP2PLUS)
193 #ifdef CONFIG_ARCH_OMAP2PLUS
194 u32 non_wakeup_gpios;
195 u32 enabled_non_wakeup_gpios;
198 u32 saved_fallingdetect;
199 u32 saved_risingdetect;
204 struct gpio_chip chip;
207 u32 dbck_enable_mask;
210 #define METHOD_MPUIO 0
211 #define METHOD_GPIO_1510 1
212 #define METHOD_GPIO_1610 2
213 #define METHOD_GPIO_7XX 3
214 #define METHOD_GPIO_24XX 5
215 #define METHOD_GPIO_44XX 6
217 #ifdef CONFIG_ARCH_OMAP16XX
218 static struct gpio_bank gpio_bank_1610[5] = {
219 { OMAP1_MPUIO_VBASE, NULL, INT_MPUIO, IH_MPUIO_BASE,
221 { OMAP1610_GPIO1_BASE, NULL, INT_GPIO_BANK1, IH_GPIO_BASE,
223 { OMAP1610_GPIO2_BASE, NULL, INT_1610_GPIO_BANK2, IH_GPIO_BASE + 16,
225 { OMAP1610_GPIO3_BASE, NULL, INT_1610_GPIO_BANK3, IH_GPIO_BASE + 32,
227 { OMAP1610_GPIO4_BASE, NULL, INT_1610_GPIO_BANK4, IH_GPIO_BASE + 48,
232 #ifdef CONFIG_ARCH_OMAP15XX
233 static struct gpio_bank gpio_bank_1510[2] = {
234 { OMAP1_MPUIO_VBASE, NULL, INT_MPUIO, IH_MPUIO_BASE,
236 { OMAP1510_GPIO_BASE, NULL, INT_GPIO_BANK1, IH_GPIO_BASE,
241 #if defined(CONFIG_ARCH_OMAP730) || defined(CONFIG_ARCH_OMAP850)
242 static struct gpio_bank gpio_bank_7xx[7] = {
243 { OMAP1_MPUIO_VBASE, NULL, INT_7XX_MPUIO, IH_MPUIO_BASE,
245 { OMAP7XX_GPIO1_BASE, NULL, INT_7XX_GPIO_BANK1, IH_GPIO_BASE,
247 { OMAP7XX_GPIO2_BASE, NULL, INT_7XX_GPIO_BANK2, IH_GPIO_BASE + 32,
249 { OMAP7XX_GPIO3_BASE, NULL, INT_7XX_GPIO_BANK3, IH_GPIO_BASE + 64,
251 { OMAP7XX_GPIO4_BASE, NULL, INT_7XX_GPIO_BANK4, IH_GPIO_BASE + 96,
253 { OMAP7XX_GPIO5_BASE, NULL, INT_7XX_GPIO_BANK5, IH_GPIO_BASE + 128,
255 { OMAP7XX_GPIO6_BASE, NULL, INT_7XX_GPIO_BANK6, IH_GPIO_BASE + 160,
260 #ifdef CONFIG_ARCH_OMAP2
262 static struct gpio_bank gpio_bank_242x[4] = {
263 { OMAP242X_GPIO1_BASE, NULL, INT_24XX_GPIO_BANK1, IH_GPIO_BASE,
265 { OMAP242X_GPIO2_BASE, NULL, INT_24XX_GPIO_BANK2, IH_GPIO_BASE + 32,
267 { OMAP242X_GPIO3_BASE, NULL, INT_24XX_GPIO_BANK3, IH_GPIO_BASE + 64,
269 { OMAP242X_GPIO4_BASE, NULL, INT_24XX_GPIO_BANK4, IH_GPIO_BASE + 96,
273 static struct gpio_bank gpio_bank_243x[5] = {
274 { OMAP243X_GPIO1_BASE, NULL, INT_24XX_GPIO_BANK1, IH_GPIO_BASE,
276 { OMAP243X_GPIO2_BASE, NULL, INT_24XX_GPIO_BANK2, IH_GPIO_BASE + 32,
278 { OMAP243X_GPIO3_BASE, NULL, INT_24XX_GPIO_BANK3, IH_GPIO_BASE + 64,
280 { OMAP243X_GPIO4_BASE, NULL, INT_24XX_GPIO_BANK4, IH_GPIO_BASE + 96,
282 { OMAP243X_GPIO5_BASE, NULL, INT_24XX_GPIO_BANK5, IH_GPIO_BASE + 128,
288 #ifdef CONFIG_ARCH_OMAP3
289 static struct gpio_bank gpio_bank_34xx[6] = {
290 { OMAP34XX_GPIO1_BASE, NULL, INT_34XX_GPIO_BANK1, IH_GPIO_BASE,
292 { OMAP34XX_GPIO2_BASE, NULL, INT_34XX_GPIO_BANK2, IH_GPIO_BASE + 32,
294 { OMAP34XX_GPIO3_BASE, NULL, INT_34XX_GPIO_BANK3, IH_GPIO_BASE + 64,
296 { OMAP34XX_GPIO4_BASE, NULL, INT_34XX_GPIO_BANK4, IH_GPIO_BASE + 96,
298 { OMAP34XX_GPIO5_BASE, NULL, INT_34XX_GPIO_BANK5, IH_GPIO_BASE + 128,
300 { OMAP34XX_GPIO6_BASE, NULL, INT_34XX_GPIO_BANK6, IH_GPIO_BASE + 160,
304 struct omap3_gpio_regs {
318 static struct omap3_gpio_regs gpio_context[OMAP34XX_NR_GPIOS];
321 #ifdef CONFIG_ARCH_OMAP4
322 static struct gpio_bank gpio_bank_44xx[6] = {
323 { OMAP44XX_GPIO1_BASE, NULL, OMAP44XX_IRQ_GPIO1, IH_GPIO_BASE,
325 { OMAP44XX_GPIO2_BASE, NULL, OMAP44XX_IRQ_GPIO2, IH_GPIO_BASE + 32,
327 { OMAP44XX_GPIO3_BASE, NULL, OMAP44XX_IRQ_GPIO3, IH_GPIO_BASE + 64,
329 { OMAP44XX_GPIO4_BASE, NULL, OMAP44XX_IRQ_GPIO4, IH_GPIO_BASE + 96,
331 { OMAP44XX_GPIO5_BASE, NULL, OMAP44XX_IRQ_GPIO5, IH_GPIO_BASE + 128,
333 { OMAP44XX_GPIO6_BASE, NULL, OMAP44XX_IRQ_GPIO6, IH_GPIO_BASE + 160,
339 static struct gpio_bank *gpio_bank;
340 static int gpio_bank_count;
342 static inline struct gpio_bank *get_gpio_bank(int gpio)
344 if (cpu_is_omap15xx()) {
345 if (OMAP_GPIO_IS_MPUIO(gpio))
346 return &gpio_bank[0];
347 return &gpio_bank[1];
349 if (cpu_is_omap16xx()) {
350 if (OMAP_GPIO_IS_MPUIO(gpio))
351 return &gpio_bank[0];
352 return &gpio_bank[1 + (gpio >> 4)];
354 if (cpu_is_omap7xx()) {
355 if (OMAP_GPIO_IS_MPUIO(gpio))
356 return &gpio_bank[0];
357 return &gpio_bank[1 + (gpio >> 5)];
359 if (cpu_is_omap24xx())
360 return &gpio_bank[gpio >> 5];
361 if (cpu_is_omap34xx() || cpu_is_omap44xx())
362 return &gpio_bank[gpio >> 5];
367 static inline int get_gpio_index(int gpio)
369 if (cpu_is_omap7xx())
371 if (cpu_is_omap24xx())
373 if (cpu_is_omap34xx() || cpu_is_omap44xx())
378 static inline int gpio_valid(int gpio)
382 if (cpu_class_is_omap1() && OMAP_GPIO_IS_MPUIO(gpio)) {
383 if (gpio >= OMAP_MAX_GPIO_LINES + 16)
387 if (cpu_is_omap15xx() && gpio < 16)
389 if ((cpu_is_omap16xx()) && gpio < 64)
391 if (cpu_is_omap7xx() && gpio < 192)
393 if (cpu_is_omap2420() && gpio < 128)
395 if (cpu_is_omap2430() && gpio < 160)
397 if ((cpu_is_omap34xx() || cpu_is_omap44xx()) && gpio < 192)
402 static int check_gpio(int gpio)
404 if (unlikely(gpio_valid(gpio) < 0)) {
405 printk(KERN_ERR "omap-gpio: invalid GPIO %d\n", gpio);
412 static void _set_gpio_direction(struct gpio_bank *bank, int gpio, int is_input)
414 void __iomem *reg = bank->base;
417 switch (bank->method) {
418 #ifdef CONFIG_ARCH_OMAP1
420 reg += OMAP_MPUIO_IO_CNTL;
423 #ifdef CONFIG_ARCH_OMAP15XX
424 case METHOD_GPIO_1510:
425 reg += OMAP1510_GPIO_DIR_CONTROL;
428 #ifdef CONFIG_ARCH_OMAP16XX
429 case METHOD_GPIO_1610:
430 reg += OMAP1610_GPIO_DIRECTION;
433 #if defined(CONFIG_ARCH_OMAP730) || defined(CONFIG_ARCH_OMAP850)
434 case METHOD_GPIO_7XX:
435 reg += OMAP7XX_GPIO_DIR_CONTROL;
438 #if defined(CONFIG_ARCH_OMAP2) || defined(CONFIG_ARCH_OMAP3)
439 case METHOD_GPIO_24XX:
440 reg += OMAP24XX_GPIO_OE;
443 #if defined(CONFIG_ARCH_OMAP4)
444 case METHOD_GPIO_44XX:
445 reg += OMAP4_GPIO_OE;
452 l = __raw_readl(reg);
457 __raw_writel(l, reg);
460 static void _set_gpio_dataout(struct gpio_bank *bank, int gpio, int enable)
462 void __iomem *reg = bank->base;
465 switch (bank->method) {
466 #ifdef CONFIG_ARCH_OMAP1
468 reg += OMAP_MPUIO_OUTPUT;
469 l = __raw_readl(reg);
476 #ifdef CONFIG_ARCH_OMAP15XX
477 case METHOD_GPIO_1510:
478 reg += OMAP1510_GPIO_DATA_OUTPUT;
479 l = __raw_readl(reg);
486 #ifdef CONFIG_ARCH_OMAP16XX
487 case METHOD_GPIO_1610:
489 reg += OMAP1610_GPIO_SET_DATAOUT;
491 reg += OMAP1610_GPIO_CLEAR_DATAOUT;
495 #if defined(CONFIG_ARCH_OMAP730) || defined(CONFIG_ARCH_OMAP850)
496 case METHOD_GPIO_7XX:
497 reg += OMAP7XX_GPIO_DATA_OUTPUT;
498 l = __raw_readl(reg);
505 #if defined(CONFIG_ARCH_OMAP2) || defined(CONFIG_ARCH_OMAP3)
506 case METHOD_GPIO_24XX:
508 reg += OMAP24XX_GPIO_SETDATAOUT;
510 reg += OMAP24XX_GPIO_CLEARDATAOUT;
514 #ifdef CONFIG_ARCH_OMAP4
515 case METHOD_GPIO_44XX:
517 reg += OMAP4_GPIO_SETDATAOUT;
519 reg += OMAP4_GPIO_CLEARDATAOUT;
527 __raw_writel(l, reg);
530 static int _get_gpio_datain(struct gpio_bank *bank, int gpio)
534 if (check_gpio(gpio) < 0)
537 switch (bank->method) {
538 #ifdef CONFIG_ARCH_OMAP1
540 reg += OMAP_MPUIO_INPUT_LATCH;
543 #ifdef CONFIG_ARCH_OMAP15XX
544 case METHOD_GPIO_1510:
545 reg += OMAP1510_GPIO_DATA_INPUT;
548 #ifdef CONFIG_ARCH_OMAP16XX
549 case METHOD_GPIO_1610:
550 reg += OMAP1610_GPIO_DATAIN;
553 #if defined(CONFIG_ARCH_OMAP730) || defined(CONFIG_ARCH_OMAP850)
554 case METHOD_GPIO_7XX:
555 reg += OMAP7XX_GPIO_DATA_INPUT;
558 #if defined(CONFIG_ARCH_OMAP2) || defined(CONFIG_ARCH_OMAP3)
559 case METHOD_GPIO_24XX:
560 reg += OMAP24XX_GPIO_DATAIN;
563 #ifdef CONFIG_ARCH_OMAP4
564 case METHOD_GPIO_44XX:
565 reg += OMAP4_GPIO_DATAIN;
571 return (__raw_readl(reg)
572 & (1 << get_gpio_index(gpio))) != 0;
575 static int _get_gpio_dataout(struct gpio_bank *bank, int gpio)
579 if (check_gpio(gpio) < 0)
583 switch (bank->method) {
584 #ifdef CONFIG_ARCH_OMAP1
586 reg += OMAP_MPUIO_OUTPUT;
589 #ifdef CONFIG_ARCH_OMAP15XX
590 case METHOD_GPIO_1510:
591 reg += OMAP1510_GPIO_DATA_OUTPUT;
594 #ifdef CONFIG_ARCH_OMAP16XX
595 case METHOD_GPIO_1610:
596 reg += OMAP1610_GPIO_DATAOUT;
599 #if defined(CONFIG_ARCH_OMAP730) || defined(CONFIG_ARCH_OMAP850)
600 case METHOD_GPIO_7XX:
601 reg += OMAP7XX_GPIO_DATA_OUTPUT;
604 #if defined(CONFIG_ARCH_OMAP2) || defined(CONFIG_ARCH_OMAP3)
605 case METHOD_GPIO_24XX:
606 reg += OMAP24XX_GPIO_DATAOUT;
609 #ifdef CONFIG_ARCH_OMAP4
610 case METHOD_GPIO_44XX:
611 reg += OMAP4_GPIO_DATAOUT;
618 return (__raw_readl(reg) & (1 << get_gpio_index(gpio))) != 0;
621 #define MOD_REG_BIT(reg, bit_mask, set) \
623 int l = __raw_readl(base + reg); \
624 if (set) l |= bit_mask; \
625 else l &= ~bit_mask; \
626 __raw_writel(l, base + reg); \
630 * _set_gpio_debounce - low level gpio debounce time
631 * @bank: the gpio bank we're acting upon
632 * @gpio: the gpio number on this @gpio
633 * @debounce: debounce time to use
635 * OMAP's debounce time is in 31us steps so we need
636 * to convert and round up to the closest unit.
638 static void _set_gpio_debounce(struct gpio_bank *bank, unsigned gpio,
641 void __iomem *reg = bank->base;
647 else if (debounce > 7936)
650 debounce = (debounce / 0x1f) - 1;
652 l = 1 << get_gpio_index(gpio);
654 if (cpu_is_omap44xx())
655 reg += OMAP4_GPIO_DEBOUNCINGTIME;
657 reg += OMAP24XX_GPIO_DEBOUNCE_VAL;
659 __raw_writel(debounce, reg);
662 if (cpu_is_omap44xx())
663 reg += OMAP4_GPIO_DEBOUNCENABLE;
665 reg += OMAP24XX_GPIO_DEBOUNCE_EN;
667 val = __raw_readl(reg);
671 if (cpu_is_omap34xx() || cpu_is_omap44xx())
672 clk_enable(bank->dbck);
675 if (cpu_is_omap34xx() || cpu_is_omap44xx())
676 clk_disable(bank->dbck);
678 bank->dbck_enable_mask = val;
680 __raw_writel(val, reg);
683 #ifdef CONFIG_ARCH_OMAP2PLUS
684 static inline void set_24xx_gpio_triggering(struct gpio_bank *bank, int gpio,
687 void __iomem *base = bank->base;
688 u32 gpio_bit = 1 << gpio;
691 if (cpu_is_omap44xx()) {
692 MOD_REG_BIT(OMAP4_GPIO_LEVELDETECT0, gpio_bit,
693 trigger & IRQ_TYPE_LEVEL_LOW);
694 MOD_REG_BIT(OMAP4_GPIO_LEVELDETECT1, gpio_bit,
695 trigger & IRQ_TYPE_LEVEL_HIGH);
696 MOD_REG_BIT(OMAP4_GPIO_RISINGDETECT, gpio_bit,
697 trigger & IRQ_TYPE_EDGE_RISING);
698 MOD_REG_BIT(OMAP4_GPIO_FALLINGDETECT, gpio_bit,
699 trigger & IRQ_TYPE_EDGE_FALLING);
701 MOD_REG_BIT(OMAP24XX_GPIO_LEVELDETECT0, gpio_bit,
702 trigger & IRQ_TYPE_LEVEL_LOW);
703 MOD_REG_BIT(OMAP24XX_GPIO_LEVELDETECT1, gpio_bit,
704 trigger & IRQ_TYPE_LEVEL_HIGH);
705 MOD_REG_BIT(OMAP24XX_GPIO_RISINGDETECT, gpio_bit,
706 trigger & IRQ_TYPE_EDGE_RISING);
707 MOD_REG_BIT(OMAP24XX_GPIO_FALLINGDETECT, gpio_bit,
708 trigger & IRQ_TYPE_EDGE_FALLING);
710 if (likely(!(bank->non_wakeup_gpios & gpio_bit))) {
711 if (cpu_is_omap44xx()) {
713 __raw_writel(1 << gpio, bank->base+
714 OMAP4_GPIO_IRQWAKEN0);
716 val = __raw_readl(bank->base +
717 OMAP4_GPIO_IRQWAKEN0);
718 __raw_writel(val & (~(1 << gpio)), bank->base +
719 OMAP4_GPIO_IRQWAKEN0);
723 * GPIO wakeup request can only be generated on edge
726 if (trigger & IRQ_TYPE_EDGE_BOTH)
727 __raw_writel(1 << gpio, bank->base
728 + OMAP24XX_GPIO_SETWKUENA);
730 __raw_writel(1 << gpio, bank->base
731 + OMAP24XX_GPIO_CLEARWKUENA);
734 /* This part needs to be executed always for OMAP34xx */
735 if (cpu_is_omap34xx() || (bank->non_wakeup_gpios & gpio_bit)) {
737 * Log the edge gpio and manually trigger the IRQ
738 * after resume if the input level changes
739 * to avoid irq lost during PER RET/OFF mode
740 * Applies for omap2 non-wakeup gpio and all omap3 gpios
742 if (trigger & IRQ_TYPE_EDGE_BOTH)
743 bank->enabled_non_wakeup_gpios |= gpio_bit;
745 bank->enabled_non_wakeup_gpios &= ~gpio_bit;
748 if (cpu_is_omap44xx()) {
750 __raw_readl(bank->base + OMAP4_GPIO_LEVELDETECT0) |
751 __raw_readl(bank->base + OMAP4_GPIO_LEVELDETECT1);
754 __raw_readl(bank->base + OMAP24XX_GPIO_LEVELDETECT0) |
755 __raw_readl(bank->base + OMAP24XX_GPIO_LEVELDETECT1);
760 #ifdef CONFIG_ARCH_OMAP1
762 * This only applies to chips that can't do both rising and falling edge
763 * detection at once. For all other chips, this function is a noop.
765 static void _toggle_gpio_edge_triggering(struct gpio_bank *bank, int gpio)
767 void __iomem *reg = bank->base;
770 switch (bank->method) {
772 reg += OMAP_MPUIO_GPIO_INT_EDGE;
774 #ifdef CONFIG_ARCH_OMAP15XX
775 case METHOD_GPIO_1510:
776 reg += OMAP1510_GPIO_INT_CONTROL;
779 #if defined(CONFIG_ARCH_OMAP730) || defined(CONFIG_ARCH_OMAP850)
780 case METHOD_GPIO_7XX:
781 reg += OMAP7XX_GPIO_INT_CONTROL;
788 l = __raw_readl(reg);
794 __raw_writel(l, reg);
798 static int _set_gpio_triggering(struct gpio_bank *bank, int gpio, int trigger)
800 void __iomem *reg = bank->base;
803 switch (bank->method) {
804 #ifdef CONFIG_ARCH_OMAP1
806 reg += OMAP_MPUIO_GPIO_INT_EDGE;
807 l = __raw_readl(reg);
808 if ((trigger & IRQ_TYPE_SENSE_MASK) == IRQ_TYPE_EDGE_BOTH)
809 bank->toggle_mask |= 1 << gpio;
810 if (trigger & IRQ_TYPE_EDGE_RISING)
812 else if (trigger & IRQ_TYPE_EDGE_FALLING)
818 #ifdef CONFIG_ARCH_OMAP15XX
819 case METHOD_GPIO_1510:
820 reg += OMAP1510_GPIO_INT_CONTROL;
821 l = __raw_readl(reg);
822 if ((trigger & IRQ_TYPE_SENSE_MASK) == IRQ_TYPE_EDGE_BOTH)
823 bank->toggle_mask |= 1 << gpio;
824 if (trigger & IRQ_TYPE_EDGE_RISING)
826 else if (trigger & IRQ_TYPE_EDGE_FALLING)
832 #ifdef CONFIG_ARCH_OMAP16XX
833 case METHOD_GPIO_1610:
835 reg += OMAP1610_GPIO_EDGE_CTRL2;
837 reg += OMAP1610_GPIO_EDGE_CTRL1;
839 l = __raw_readl(reg);
840 l &= ~(3 << (gpio << 1));
841 if (trigger & IRQ_TYPE_EDGE_RISING)
842 l |= 2 << (gpio << 1);
843 if (trigger & IRQ_TYPE_EDGE_FALLING)
844 l |= 1 << (gpio << 1);
846 /* Enable wake-up during idle for dynamic tick */
847 __raw_writel(1 << gpio, bank->base + OMAP1610_GPIO_SET_WAKEUPENA);
849 __raw_writel(1 << gpio, bank->base + OMAP1610_GPIO_CLEAR_WAKEUPENA);
852 #if defined(CONFIG_ARCH_OMAP730) || defined(CONFIG_ARCH_OMAP850)
853 case METHOD_GPIO_7XX:
854 reg += OMAP7XX_GPIO_INT_CONTROL;
855 l = __raw_readl(reg);
856 if ((trigger & IRQ_TYPE_SENSE_MASK) == IRQ_TYPE_EDGE_BOTH)
857 bank->toggle_mask |= 1 << gpio;
858 if (trigger & IRQ_TYPE_EDGE_RISING)
860 else if (trigger & IRQ_TYPE_EDGE_FALLING)
866 #ifdef CONFIG_ARCH_OMAP2PLUS
867 case METHOD_GPIO_24XX:
868 case METHOD_GPIO_44XX:
869 set_24xx_gpio_triggering(bank, gpio, trigger);
875 __raw_writel(l, reg);
881 static int gpio_irq_type(unsigned irq, unsigned type)
883 struct gpio_bank *bank;
888 if (!cpu_class_is_omap2() && irq > IH_MPUIO_BASE)
889 gpio = OMAP_MPUIO(irq - IH_MPUIO_BASE);
891 gpio = irq - IH_GPIO_BASE;
893 if (check_gpio(gpio) < 0)
896 if (type & ~IRQ_TYPE_SENSE_MASK)
899 /* OMAP1 allows only only edge triggering */
900 if (!cpu_class_is_omap2()
901 && (type & (IRQ_TYPE_LEVEL_LOW|IRQ_TYPE_LEVEL_HIGH)))
904 bank = get_irq_chip_data(irq);
905 spin_lock_irqsave(&bank->lock, flags);
906 retval = _set_gpio_triggering(bank, get_gpio_index(gpio), type);
908 irq_desc[irq].status &= ~IRQ_TYPE_SENSE_MASK;
909 irq_desc[irq].status |= type;
911 spin_unlock_irqrestore(&bank->lock, flags);
913 if (type & (IRQ_TYPE_LEVEL_LOW | IRQ_TYPE_LEVEL_HIGH))
914 __set_irq_handler_unlocked(irq, handle_level_irq);
915 else if (type & (IRQ_TYPE_EDGE_FALLING | IRQ_TYPE_EDGE_RISING))
916 __set_irq_handler_unlocked(irq, handle_edge_irq);
921 static void _clear_gpio_irqbank(struct gpio_bank *bank, int gpio_mask)
923 void __iomem *reg = bank->base;
925 switch (bank->method) {
926 #ifdef CONFIG_ARCH_OMAP1
928 /* MPUIO irqstatus is reset by reading the status register,
929 * so do nothing here */
932 #ifdef CONFIG_ARCH_OMAP15XX
933 case METHOD_GPIO_1510:
934 reg += OMAP1510_GPIO_INT_STATUS;
937 #ifdef CONFIG_ARCH_OMAP16XX
938 case METHOD_GPIO_1610:
939 reg += OMAP1610_GPIO_IRQSTATUS1;
942 #if defined(CONFIG_ARCH_OMAP730) || defined(CONFIG_ARCH_OMAP850)
943 case METHOD_GPIO_7XX:
944 reg += OMAP7XX_GPIO_INT_STATUS;
947 #if defined(CONFIG_ARCH_OMAP2) || defined(CONFIG_ARCH_OMAP3)
948 case METHOD_GPIO_24XX:
949 reg += OMAP24XX_GPIO_IRQSTATUS1;
952 #if defined(CONFIG_ARCH_OMAP4)
953 case METHOD_GPIO_44XX:
954 reg += OMAP4_GPIO_IRQSTATUS0;
961 __raw_writel(gpio_mask, reg);
963 /* Workaround for clearing DSP GPIO interrupts to allow retention */
964 if (cpu_is_omap24xx() || cpu_is_omap34xx())
965 reg = bank->base + OMAP24XX_GPIO_IRQSTATUS2;
966 else if (cpu_is_omap44xx())
967 reg = bank->base + OMAP4_GPIO_IRQSTATUS1;
969 if (cpu_is_omap24xx() || cpu_is_omap34xx() || cpu_is_omap44xx()) {
970 __raw_writel(gpio_mask, reg);
972 /* Flush posted write for the irq status to avoid spurious interrupts */
977 static inline void _clear_gpio_irqstatus(struct gpio_bank *bank, int gpio)
979 _clear_gpio_irqbank(bank, 1 << get_gpio_index(gpio));
982 static u32 _get_gpio_irqbank_mask(struct gpio_bank *bank)
984 void __iomem *reg = bank->base;
989 switch (bank->method) {
990 #ifdef CONFIG_ARCH_OMAP1
992 reg += OMAP_MPUIO_GPIO_MASKIT;
997 #ifdef CONFIG_ARCH_OMAP15XX
998 case METHOD_GPIO_1510:
999 reg += OMAP1510_GPIO_INT_MASK;
1004 #ifdef CONFIG_ARCH_OMAP16XX
1005 case METHOD_GPIO_1610:
1006 reg += OMAP1610_GPIO_IRQENABLE1;
1010 #if defined(CONFIG_ARCH_OMAP730) || defined(CONFIG_ARCH_OMAP850)
1011 case METHOD_GPIO_7XX:
1012 reg += OMAP7XX_GPIO_INT_MASK;
1017 #if defined(CONFIG_ARCH_OMAP2) || defined(CONFIG_ARCH_OMAP3)
1018 case METHOD_GPIO_24XX:
1019 reg += OMAP24XX_GPIO_IRQENABLE1;
1023 #if defined(CONFIG_ARCH_OMAP4)
1024 case METHOD_GPIO_44XX:
1025 reg += OMAP4_GPIO_IRQSTATUSSET0;
1034 l = __raw_readl(reg);
1041 static void _enable_gpio_irqbank(struct gpio_bank *bank, int gpio_mask, int enable)
1043 void __iomem *reg = bank->base;
1046 switch (bank->method) {
1047 #ifdef CONFIG_ARCH_OMAP1
1049 reg += OMAP_MPUIO_GPIO_MASKIT;
1050 l = __raw_readl(reg);
1057 #ifdef CONFIG_ARCH_OMAP15XX
1058 case METHOD_GPIO_1510:
1059 reg += OMAP1510_GPIO_INT_MASK;
1060 l = __raw_readl(reg);
1067 #ifdef CONFIG_ARCH_OMAP16XX
1068 case METHOD_GPIO_1610:
1070 reg += OMAP1610_GPIO_SET_IRQENABLE1;
1072 reg += OMAP1610_GPIO_CLEAR_IRQENABLE1;
1076 #if defined(CONFIG_ARCH_OMAP730) || defined(CONFIG_ARCH_OMAP850)
1077 case METHOD_GPIO_7XX:
1078 reg += OMAP7XX_GPIO_INT_MASK;
1079 l = __raw_readl(reg);
1086 #if defined(CONFIG_ARCH_OMAP2) || defined(CONFIG_ARCH_OMAP3)
1087 case METHOD_GPIO_24XX:
1089 reg += OMAP24XX_GPIO_SETIRQENABLE1;
1091 reg += OMAP24XX_GPIO_CLEARIRQENABLE1;
1095 #ifdef CONFIG_ARCH_OMAP4
1096 case METHOD_GPIO_44XX:
1098 reg += OMAP4_GPIO_IRQSTATUSSET0;
1100 reg += OMAP4_GPIO_IRQSTATUSCLR0;
1108 __raw_writel(l, reg);
1111 static inline void _set_gpio_irqenable(struct gpio_bank *bank, int gpio, int enable)
1113 _enable_gpio_irqbank(bank, 1 << get_gpio_index(gpio), enable);
1117 * Note that ENAWAKEUP needs to be enabled in GPIO_SYSCONFIG register.
1118 * 1510 does not seem to have a wake-up register. If JTAG is connected
1119 * to the target, system will wake up always on GPIO events. While
1120 * system is running all registered GPIO interrupts need to have wake-up
1121 * enabled. When system is suspended, only selected GPIO interrupts need
1122 * to have wake-up enabled.
1124 static int _set_gpio_wakeup(struct gpio_bank *bank, int gpio, int enable)
1126 unsigned long uninitialized_var(flags);
1128 switch (bank->method) {
1129 #ifdef CONFIG_ARCH_OMAP16XX
1131 case METHOD_GPIO_1610:
1132 spin_lock_irqsave(&bank->lock, flags);
1134 bank->suspend_wakeup |= (1 << gpio);
1136 bank->suspend_wakeup &= ~(1 << gpio);
1137 spin_unlock_irqrestore(&bank->lock, flags);
1140 #ifdef CONFIG_ARCH_OMAP2PLUS
1141 case METHOD_GPIO_24XX:
1142 case METHOD_GPIO_44XX:
1143 if (bank->non_wakeup_gpios & (1 << gpio)) {
1144 printk(KERN_ERR "Unable to modify wakeup on "
1145 "non-wakeup GPIO%d\n",
1146 (bank - gpio_bank) * 32 + gpio);
1149 spin_lock_irqsave(&bank->lock, flags);
1151 bank->suspend_wakeup |= (1 << gpio);
1153 bank->suspend_wakeup &= ~(1 << gpio);
1154 spin_unlock_irqrestore(&bank->lock, flags);
1158 printk(KERN_ERR "Can't enable GPIO wakeup for method %i\n",
1164 static void _reset_gpio(struct gpio_bank *bank, int gpio)
1166 _set_gpio_direction(bank, get_gpio_index(gpio), 1);
1167 _set_gpio_irqenable(bank, gpio, 0);
1168 _clear_gpio_irqstatus(bank, gpio);
1169 _set_gpio_triggering(bank, get_gpio_index(gpio), IRQ_TYPE_NONE);
1172 /* Use disable_irq_wake() and enable_irq_wake() functions from drivers */
1173 static int gpio_wake_enable(unsigned int irq, unsigned int enable)
1175 unsigned int gpio = irq - IH_GPIO_BASE;
1176 struct gpio_bank *bank;
1179 if (check_gpio(gpio) < 0)
1181 bank = get_irq_chip_data(irq);
1182 retval = _set_gpio_wakeup(bank, get_gpio_index(gpio), enable);
1187 static int omap_gpio_request(struct gpio_chip *chip, unsigned offset)
1189 struct gpio_bank *bank = container_of(chip, struct gpio_bank, chip);
1190 unsigned long flags;
1192 spin_lock_irqsave(&bank->lock, flags);
1194 /* Set trigger to none. You need to enable the desired trigger with
1195 * request_irq() or set_irq_type().
1197 _set_gpio_triggering(bank, offset, IRQ_TYPE_NONE);
1199 #ifdef CONFIG_ARCH_OMAP15XX
1200 if (bank->method == METHOD_GPIO_1510) {
1203 /* Claim the pin for MPU */
1204 reg = bank->base + OMAP1510_GPIO_PIN_CONTROL;
1205 __raw_writel(__raw_readl(reg) | (1 << offset), reg);
1208 if (!cpu_class_is_omap1()) {
1209 if (!bank->mod_usage) {
1210 void __iomem *reg = bank->base;
1213 if (cpu_is_omap24xx() || cpu_is_omap34xx())
1214 reg += OMAP24XX_GPIO_CTRL;
1215 else if (cpu_is_omap44xx())
1216 reg += OMAP4_GPIO_CTRL;
1217 ctrl = __raw_readl(reg);
1218 /* Module is enabled, clocks are not gated */
1220 __raw_writel(ctrl, reg);
1222 bank->mod_usage |= 1 << offset;
1224 spin_unlock_irqrestore(&bank->lock, flags);
1229 static void omap_gpio_free(struct gpio_chip *chip, unsigned offset)
1231 struct gpio_bank *bank = container_of(chip, struct gpio_bank, chip);
1232 unsigned long flags;
1234 spin_lock_irqsave(&bank->lock, flags);
1235 #ifdef CONFIG_ARCH_OMAP16XX
1236 if (bank->method == METHOD_GPIO_1610) {
1237 /* Disable wake-up during idle for dynamic tick */
1238 void __iomem *reg = bank->base + OMAP1610_GPIO_CLEAR_WAKEUPENA;
1239 __raw_writel(1 << offset, reg);
1242 #if defined(CONFIG_ARCH_OMAP2) || defined(CONFIG_ARCH_OMAP3)
1243 if (bank->method == METHOD_GPIO_24XX) {
1244 /* Disable wake-up during idle for dynamic tick */
1245 void __iomem *reg = bank->base + OMAP24XX_GPIO_CLEARWKUENA;
1246 __raw_writel(1 << offset, reg);
1249 #ifdef CONFIG_ARCH_OMAP4
1250 if (bank->method == METHOD_GPIO_44XX) {
1251 /* Disable wake-up during idle for dynamic tick */
1252 void __iomem *reg = bank->base + OMAP4_GPIO_IRQWAKEN0;
1253 __raw_writel(1 << offset, reg);
1256 if (!cpu_class_is_omap1()) {
1257 bank->mod_usage &= ~(1 << offset);
1258 if (!bank->mod_usage) {
1259 void __iomem *reg = bank->base;
1262 if (cpu_is_omap24xx() || cpu_is_omap34xx())
1263 reg += OMAP24XX_GPIO_CTRL;
1264 else if (cpu_is_omap44xx())
1265 reg += OMAP4_GPIO_CTRL;
1266 ctrl = __raw_readl(reg);
1267 /* Module is disabled, clocks are gated */
1269 __raw_writel(ctrl, reg);
1272 _reset_gpio(bank, bank->chip.base + offset);
1273 spin_unlock_irqrestore(&bank->lock, flags);
1277 * We need to unmask the GPIO bank interrupt as soon as possible to
1278 * avoid missing GPIO interrupts for other lines in the bank.
1279 * Then we need to mask-read-clear-unmask the triggered GPIO lines
1280 * in the bank to avoid missing nested interrupts for a GPIO line.
1281 * If we wait to unmask individual GPIO lines in the bank after the
1282 * line's interrupt handler has been run, we may miss some nested
1285 static void gpio_irq_handler(unsigned int irq, struct irq_desc *desc)
1287 void __iomem *isr_reg = NULL;
1289 unsigned int gpio_irq, gpio_index;
1290 struct gpio_bank *bank;
1294 desc->chip->ack(irq);
1296 bank = get_irq_data(irq);
1297 #ifdef CONFIG_ARCH_OMAP1
1298 if (bank->method == METHOD_MPUIO)
1299 isr_reg = bank->base + OMAP_MPUIO_GPIO_INT;
1301 #ifdef CONFIG_ARCH_OMAP15XX
1302 if (bank->method == METHOD_GPIO_1510)
1303 isr_reg = bank->base + OMAP1510_GPIO_INT_STATUS;
1305 #if defined(CONFIG_ARCH_OMAP16XX)
1306 if (bank->method == METHOD_GPIO_1610)
1307 isr_reg = bank->base + OMAP1610_GPIO_IRQSTATUS1;
1309 #if defined(CONFIG_ARCH_OMAP730) || defined(CONFIG_ARCH_OMAP850)
1310 if (bank->method == METHOD_GPIO_7XX)
1311 isr_reg = bank->base + OMAP7XX_GPIO_INT_STATUS;
1313 #if defined(CONFIG_ARCH_OMAP2) || defined(CONFIG_ARCH_OMAP3)
1314 if (bank->method == METHOD_GPIO_24XX)
1315 isr_reg = bank->base + OMAP24XX_GPIO_IRQSTATUS1;
1317 #if defined(CONFIG_ARCH_OMAP4)
1318 if (bank->method == METHOD_GPIO_44XX)
1319 isr_reg = bank->base + OMAP4_GPIO_IRQSTATUS0;
1322 if (WARN_ON(!isr_reg))
1326 u32 isr_saved, level_mask = 0;
1329 enabled = _get_gpio_irqbank_mask(bank);
1330 isr_saved = isr = __raw_readl(isr_reg) & enabled;
1332 if (cpu_is_omap15xx() && (bank->method == METHOD_MPUIO))
1335 if (cpu_class_is_omap2()) {
1336 level_mask = bank->level_mask & enabled;
1339 /* clear edge sensitive interrupts before handler(s) are
1340 called so that we don't miss any interrupt occurred while
1342 _enable_gpio_irqbank(bank, isr_saved & ~level_mask, 0);
1343 _clear_gpio_irqbank(bank, isr_saved & ~level_mask);
1344 _enable_gpio_irqbank(bank, isr_saved & ~level_mask, 1);
1346 /* if there is only edge sensitive GPIO pin interrupts
1347 configured, we could unmask GPIO bank interrupt immediately */
1348 if (!level_mask && !unmasked) {
1350 desc->chip->unmask(irq);
1358 gpio_irq = bank->virtual_irq_start;
1359 for (; isr != 0; isr >>= 1, gpio_irq++) {
1360 gpio_index = get_gpio_index(irq_to_gpio(gpio_irq));
1365 #ifdef CONFIG_ARCH_OMAP1
1367 * Some chips can't respond to both rising and falling
1368 * at the same time. If this irq was requested with
1369 * both flags, we need to flip the ICR data for the IRQ
1370 * to respond to the IRQ for the opposite direction.
1371 * This will be indicated in the bank toggle_mask.
1373 if (bank->toggle_mask & (1 << gpio_index))
1374 _toggle_gpio_edge_triggering(bank, gpio_index);
1377 generic_handle_irq(gpio_irq);
1380 /* if bank has any level sensitive GPIO pin interrupt
1381 configured, we must unmask the bank interrupt only after
1382 handler(s) are executed in order to avoid spurious bank
1386 desc->chip->unmask(irq);
1390 static void gpio_irq_shutdown(unsigned int irq)
1392 unsigned int gpio = irq - IH_GPIO_BASE;
1393 struct gpio_bank *bank = get_irq_chip_data(irq);
1395 _reset_gpio(bank, gpio);
1398 static void gpio_ack_irq(unsigned int irq)
1400 unsigned int gpio = irq - IH_GPIO_BASE;
1401 struct gpio_bank *bank = get_irq_chip_data(irq);
1403 _clear_gpio_irqstatus(bank, gpio);
1406 static void gpio_mask_irq(unsigned int irq)
1408 unsigned int gpio = irq - IH_GPIO_BASE;
1409 struct gpio_bank *bank = get_irq_chip_data(irq);
1411 _set_gpio_irqenable(bank, gpio, 0);
1412 _set_gpio_triggering(bank, get_gpio_index(gpio), IRQ_TYPE_NONE);
1415 static void gpio_unmask_irq(unsigned int irq)
1417 unsigned int gpio = irq - IH_GPIO_BASE;
1418 struct gpio_bank *bank = get_irq_chip_data(irq);
1419 unsigned int irq_mask = 1 << get_gpio_index(gpio);
1420 struct irq_desc *desc = irq_to_desc(irq);
1421 u32 trigger = desc->status & IRQ_TYPE_SENSE_MASK;
1424 _set_gpio_triggering(bank, get_gpio_index(gpio), trigger);
1426 /* For level-triggered GPIOs, the clearing must be done after
1427 * the HW source is cleared, thus after the handler has run */
1428 if (bank->level_mask & irq_mask) {
1429 _set_gpio_irqenable(bank, gpio, 0);
1430 _clear_gpio_irqstatus(bank, gpio);
1433 _set_gpio_irqenable(bank, gpio, 1);
1436 static struct irq_chip gpio_irq_chip = {
1438 .shutdown = gpio_irq_shutdown,
1439 .ack = gpio_ack_irq,
1440 .mask = gpio_mask_irq,
1441 .unmask = gpio_unmask_irq,
1442 .set_type = gpio_irq_type,
1443 .set_wake = gpio_wake_enable,
1446 /*---------------------------------------------------------------------*/
1448 #ifdef CONFIG_ARCH_OMAP1
1450 /* MPUIO uses the always-on 32k clock */
1452 static void mpuio_ack_irq(unsigned int irq)
1454 /* The ISR is reset automatically, so do nothing here. */
1457 static void mpuio_mask_irq(unsigned int irq)
1459 unsigned int gpio = OMAP_MPUIO(irq - IH_MPUIO_BASE);
1460 struct gpio_bank *bank = get_irq_chip_data(irq);
1462 _set_gpio_irqenable(bank, gpio, 0);
1465 static void mpuio_unmask_irq(unsigned int irq)
1467 unsigned int gpio = OMAP_MPUIO(irq - IH_MPUIO_BASE);
1468 struct gpio_bank *bank = get_irq_chip_data(irq);
1470 _set_gpio_irqenable(bank, gpio, 1);
1473 static struct irq_chip mpuio_irq_chip = {
1475 .ack = mpuio_ack_irq,
1476 .mask = mpuio_mask_irq,
1477 .unmask = mpuio_unmask_irq,
1478 .set_type = gpio_irq_type,
1479 #ifdef CONFIG_ARCH_OMAP16XX
1480 /* REVISIT: assuming only 16xx supports MPUIO wake events */
1481 .set_wake = gpio_wake_enable,
1486 #define bank_is_mpuio(bank) ((bank)->method == METHOD_MPUIO)
1489 #ifdef CONFIG_ARCH_OMAP16XX
1491 #include <linux/platform_device.h>
1493 static int omap_mpuio_suspend_noirq(struct device *dev)
1495 struct platform_device *pdev = to_platform_device(dev);
1496 struct gpio_bank *bank = platform_get_drvdata(pdev);
1497 void __iomem *mask_reg = bank->base + OMAP_MPUIO_GPIO_MASKIT;
1498 unsigned long flags;
1500 spin_lock_irqsave(&bank->lock, flags);
1501 bank->saved_wakeup = __raw_readl(mask_reg);
1502 __raw_writel(0xffff & ~bank->suspend_wakeup, mask_reg);
1503 spin_unlock_irqrestore(&bank->lock, flags);
1508 static int omap_mpuio_resume_noirq(struct device *dev)
1510 struct platform_device *pdev = to_platform_device(dev);
1511 struct gpio_bank *bank = platform_get_drvdata(pdev);
1512 void __iomem *mask_reg = bank->base + OMAP_MPUIO_GPIO_MASKIT;
1513 unsigned long flags;
1515 spin_lock_irqsave(&bank->lock, flags);
1516 __raw_writel(bank->saved_wakeup, mask_reg);
1517 spin_unlock_irqrestore(&bank->lock, flags);
1522 static const struct dev_pm_ops omap_mpuio_dev_pm_ops = {
1523 .suspend_noirq = omap_mpuio_suspend_noirq,
1524 .resume_noirq = omap_mpuio_resume_noirq,
1527 /* use platform_driver for this, now that there's no longer any
1528 * point to sys_device (other than not disturbing old code).
1530 static struct platform_driver omap_mpuio_driver = {
1533 .pm = &omap_mpuio_dev_pm_ops,
1537 static struct platform_device omap_mpuio_device = {
1541 .driver = &omap_mpuio_driver.driver,
1543 /* could list the /proc/iomem resources */
1546 static inline void mpuio_init(void)
1548 platform_set_drvdata(&omap_mpuio_device, &gpio_bank_1610[0]);
1550 if (platform_driver_register(&omap_mpuio_driver) == 0)
1551 (void) platform_device_register(&omap_mpuio_device);
1555 static inline void mpuio_init(void) {}
1560 extern struct irq_chip mpuio_irq_chip;
1562 #define bank_is_mpuio(bank) 0
1563 static inline void mpuio_init(void) {}
1567 /*---------------------------------------------------------------------*/
1569 /* REVISIT these are stupid implementations! replace by ones that
1570 * don't switch on METHOD_* and which mostly avoid spinlocks
1573 static int gpio_input(struct gpio_chip *chip, unsigned offset)
1575 struct gpio_bank *bank;
1576 unsigned long flags;
1578 bank = container_of(chip, struct gpio_bank, chip);
1579 spin_lock_irqsave(&bank->lock, flags);
1580 _set_gpio_direction(bank, offset, 1);
1581 spin_unlock_irqrestore(&bank->lock, flags);
1585 static int gpio_is_input(struct gpio_bank *bank, int mask)
1587 void __iomem *reg = bank->base;
1589 switch (bank->method) {
1591 reg += OMAP_MPUIO_IO_CNTL;
1593 case METHOD_GPIO_1510:
1594 reg += OMAP1510_GPIO_DIR_CONTROL;
1596 case METHOD_GPIO_1610:
1597 reg += OMAP1610_GPIO_DIRECTION;
1599 case METHOD_GPIO_7XX:
1600 reg += OMAP7XX_GPIO_DIR_CONTROL;
1602 case METHOD_GPIO_24XX:
1603 reg += OMAP24XX_GPIO_OE;
1605 case METHOD_GPIO_44XX:
1606 reg += OMAP4_GPIO_OE;
1609 WARN_ONCE(1, "gpio_is_input: incorrect OMAP GPIO method");
1612 return __raw_readl(reg) & mask;
1615 static int gpio_get(struct gpio_chip *chip, unsigned offset)
1617 struct gpio_bank *bank;
1622 gpio = chip->base + offset;
1623 bank = get_gpio_bank(gpio);
1625 mask = 1 << get_gpio_index(gpio);
1627 if (gpio_is_input(bank, mask))
1628 return _get_gpio_datain(bank, gpio);
1630 return _get_gpio_dataout(bank, gpio);
1633 static int gpio_output(struct gpio_chip *chip, unsigned offset, int value)
1635 struct gpio_bank *bank;
1636 unsigned long flags;
1638 bank = container_of(chip, struct gpio_bank, chip);
1639 spin_lock_irqsave(&bank->lock, flags);
1640 _set_gpio_dataout(bank, offset, value);
1641 _set_gpio_direction(bank, offset, 0);
1642 spin_unlock_irqrestore(&bank->lock, flags);
1646 static int gpio_debounce(struct gpio_chip *chip, unsigned offset,
1649 struct gpio_bank *bank;
1650 unsigned long flags;
1652 bank = container_of(chip, struct gpio_bank, chip);
1653 spin_lock_irqsave(&bank->lock, flags);
1654 _set_gpio_debounce(bank, offset, debounce);
1655 spin_unlock_irqrestore(&bank->lock, flags);
1660 static void gpio_set(struct gpio_chip *chip, unsigned offset, int value)
1662 struct gpio_bank *bank;
1663 unsigned long flags;
1665 bank = container_of(chip, struct gpio_bank, chip);
1666 spin_lock_irqsave(&bank->lock, flags);
1667 _set_gpio_dataout(bank, offset, value);
1668 spin_unlock_irqrestore(&bank->lock, flags);
1671 static int gpio_2irq(struct gpio_chip *chip, unsigned offset)
1673 struct gpio_bank *bank;
1675 bank = container_of(chip, struct gpio_bank, chip);
1676 return bank->virtual_irq_start + offset;
1679 /*---------------------------------------------------------------------*/
1681 static int initialized;
1682 #if defined(CONFIG_ARCH_OMAP1) || defined(CONFIG_ARCH_OMAP2)
1683 static struct clk * gpio_ick;
1686 #if defined(CONFIG_ARCH_OMAP2)
1687 static struct clk * gpio_fck;
1690 #if defined(CONFIG_ARCH_OMAP2430)
1691 static struct clk * gpio5_ick;
1692 static struct clk * gpio5_fck;
1695 #if defined(CONFIG_ARCH_OMAP3) || defined(CONFIG_ARCH_OMAP4)
1696 static struct clk *gpio_iclks[OMAP34XX_NR_GPIOS];
1699 static void __init omap_gpio_show_rev(void)
1703 if (cpu_is_omap16xx())
1704 rev = __raw_readw(gpio_bank[1].base + OMAP1610_GPIO_REVISION);
1705 else if (cpu_is_omap24xx() || cpu_is_omap34xx())
1706 rev = __raw_readl(gpio_bank[0].base + OMAP24XX_GPIO_REVISION);
1707 else if (cpu_is_omap44xx())
1708 rev = __raw_readl(gpio_bank[0].base + OMAP4_GPIO_REVISION);
1712 printk(KERN_INFO "OMAP GPIO hardware version %d.%d\n",
1713 (rev >> 4) & 0x0f, rev & 0x0f);
1716 /* This lock class tells lockdep that GPIO irqs are in a different
1717 * category than their parents, so it won't report false recursion.
1719 static struct lock_class_key gpio_lock_class;
1721 static int __init _omap_gpio_init(void)
1725 struct gpio_bank *bank;
1726 int bank_size = SZ_8K; /* Module 4KB + L4 4KB except on omap1 */
1731 #if defined(CONFIG_ARCH_OMAP1)
1732 if (cpu_is_omap15xx()) {
1733 gpio_ick = clk_get(NULL, "arm_gpio_ck");
1734 if (IS_ERR(gpio_ick))
1735 printk("Could not get arm_gpio_ck\n");
1737 clk_enable(gpio_ick);
1740 #if defined(CONFIG_ARCH_OMAP2)
1741 if (cpu_class_is_omap2()) {
1742 gpio_ick = clk_get(NULL, "gpios_ick");
1743 if (IS_ERR(gpio_ick))
1744 printk("Could not get gpios_ick\n");
1746 clk_enable(gpio_ick);
1747 gpio_fck = clk_get(NULL, "gpios_fck");
1748 if (IS_ERR(gpio_fck))
1749 printk("Could not get gpios_fck\n");
1751 clk_enable(gpio_fck);
1754 * On 2430 & 3430 GPIO 5 uses CORE L4 ICLK
1756 #if defined(CONFIG_ARCH_OMAP2430)
1757 if (cpu_is_omap2430()) {
1758 gpio5_ick = clk_get(NULL, "gpio5_ick");
1759 if (IS_ERR(gpio5_ick))
1760 printk("Could not get gpio5_ick\n");
1762 clk_enable(gpio5_ick);
1763 gpio5_fck = clk_get(NULL, "gpio5_fck");
1764 if (IS_ERR(gpio5_fck))
1765 printk("Could not get gpio5_fck\n");
1767 clk_enable(gpio5_fck);
1773 #if defined(CONFIG_ARCH_OMAP3) || defined(CONFIG_ARCH_OMAP4)
1774 if (cpu_is_omap34xx() || cpu_is_omap44xx()) {
1775 for (i = 0; i < OMAP34XX_NR_GPIOS; i++) {
1776 sprintf(clk_name, "gpio%d_ick", i + 1);
1777 gpio_iclks[i] = clk_get(NULL, clk_name);
1778 if (IS_ERR(gpio_iclks[i]))
1779 printk(KERN_ERR "Could not get %s\n", clk_name);
1781 clk_enable(gpio_iclks[i]);
1787 #ifdef CONFIG_ARCH_OMAP15XX
1788 if (cpu_is_omap15xx()) {
1789 gpio_bank_count = 2;
1790 gpio_bank = gpio_bank_1510;
1794 #if defined(CONFIG_ARCH_OMAP16XX)
1795 if (cpu_is_omap16xx()) {
1796 gpio_bank_count = 5;
1797 gpio_bank = gpio_bank_1610;
1801 #if defined(CONFIG_ARCH_OMAP730) || defined(CONFIG_ARCH_OMAP850)
1802 if (cpu_is_omap7xx()) {
1803 gpio_bank_count = 7;
1804 gpio_bank = gpio_bank_7xx;
1808 #ifdef CONFIG_ARCH_OMAP2
1809 if (cpu_is_omap242x()) {
1810 gpio_bank_count = 4;
1811 gpio_bank = gpio_bank_242x;
1813 if (cpu_is_omap243x()) {
1814 gpio_bank_count = 5;
1815 gpio_bank = gpio_bank_243x;
1818 #ifdef CONFIG_ARCH_OMAP3
1819 if (cpu_is_omap34xx()) {
1820 gpio_bank_count = OMAP34XX_NR_GPIOS;
1821 gpio_bank = gpio_bank_34xx;
1824 #ifdef CONFIG_ARCH_OMAP4
1825 if (cpu_is_omap44xx()) {
1826 gpio_bank_count = OMAP34XX_NR_GPIOS;
1827 gpio_bank = gpio_bank_44xx;
1830 for (i = 0; i < gpio_bank_count; i++) {
1831 int j, gpio_count = 16;
1833 bank = &gpio_bank[i];
1834 spin_lock_init(&bank->lock);
1836 /* Static mapping, never released */
1837 bank->base = ioremap(bank->pbase, bank_size);
1839 printk(KERN_ERR "Could not ioremap gpio bank%i\n", i);
1843 if (bank_is_mpuio(bank))
1844 __raw_writew(0xffff, bank->base + OMAP_MPUIO_GPIO_MASKIT);
1845 if (cpu_is_omap15xx() && bank->method == METHOD_GPIO_1510) {
1846 __raw_writew(0xffff, bank->base + OMAP1510_GPIO_INT_MASK);
1847 __raw_writew(0x0000, bank->base + OMAP1510_GPIO_INT_STATUS);
1849 if (cpu_is_omap16xx() && bank->method == METHOD_GPIO_1610) {
1850 __raw_writew(0x0000, bank->base + OMAP1610_GPIO_IRQENABLE1);
1851 __raw_writew(0xffff, bank->base + OMAP1610_GPIO_IRQSTATUS1);
1852 __raw_writew(0x0014, bank->base + OMAP1610_GPIO_SYSCONFIG);
1854 if (cpu_is_omap7xx() && bank->method == METHOD_GPIO_7XX) {
1855 __raw_writel(0xffffffff, bank->base + OMAP7XX_GPIO_INT_MASK);
1856 __raw_writel(0x00000000, bank->base + OMAP7XX_GPIO_INT_STATUS);
1858 gpio_count = 32; /* 7xx has 32-bit GPIOs */
1861 #ifdef CONFIG_ARCH_OMAP2PLUS
1862 if ((bank->method == METHOD_GPIO_24XX) ||
1863 (bank->method == METHOD_GPIO_44XX)) {
1864 static const u32 non_wakeup_gpios[] = {
1865 0xe203ffc0, 0x08700040
1868 if (cpu_is_omap44xx()) {
1869 __raw_writel(0xffffffff, bank->base +
1870 OMAP4_GPIO_IRQSTATUSCLR0);
1871 __raw_writew(0x0015, bank->base +
1872 OMAP4_GPIO_SYSCONFIG);
1873 __raw_writel(0x00000000, bank->base +
1874 OMAP4_GPIO_DEBOUNCENABLE);
1876 * Initialize interface clock ungated,
1879 __raw_writel(0, bank->base + OMAP4_GPIO_CTRL);
1881 __raw_writel(0x00000000, bank->base +
1882 OMAP24XX_GPIO_IRQENABLE1);
1883 __raw_writel(0xffffffff, bank->base +
1884 OMAP24XX_GPIO_IRQSTATUS1);
1885 __raw_writew(0x0015, bank->base +
1886 OMAP24XX_GPIO_SYSCONFIG);
1887 __raw_writel(0x00000000, bank->base +
1888 OMAP24XX_GPIO_DEBOUNCE_EN);
1891 * Initialize interface clock ungated,
1894 __raw_writel(0, bank->base +
1895 OMAP24XX_GPIO_CTRL);
1897 if (cpu_is_omap24xx() &&
1898 i < ARRAY_SIZE(non_wakeup_gpios))
1899 bank->non_wakeup_gpios = non_wakeup_gpios[i];
1904 bank->mod_usage = 0;
1905 /* REVISIT eventually switch from OMAP-specific gpio structs
1906 * over to the generic ones
1908 bank->chip.request = omap_gpio_request;
1909 bank->chip.free = omap_gpio_free;
1910 bank->chip.direction_input = gpio_input;
1911 bank->chip.get = gpio_get;
1912 bank->chip.direction_output = gpio_output;
1913 bank->chip.set_debounce = gpio_debounce;
1914 bank->chip.set = gpio_set;
1915 bank->chip.to_irq = gpio_2irq;
1916 if (bank_is_mpuio(bank)) {
1917 bank->chip.label = "mpuio";
1918 #ifdef CONFIG_ARCH_OMAP16XX
1919 bank->chip.dev = &omap_mpuio_device.dev;
1921 bank->chip.base = OMAP_MPUIO(0);
1923 bank->chip.label = "gpio";
1924 bank->chip.base = gpio;
1927 bank->chip.ngpio = gpio_count;
1929 gpiochip_add(&bank->chip);
1931 for (j = bank->virtual_irq_start;
1932 j < bank->virtual_irq_start + gpio_count; j++) {
1933 lockdep_set_class(&irq_desc[j].lock, &gpio_lock_class);
1934 set_irq_chip_data(j, bank);
1935 if (bank_is_mpuio(bank))
1936 set_irq_chip(j, &mpuio_irq_chip);
1938 set_irq_chip(j, &gpio_irq_chip);
1939 set_irq_handler(j, handle_simple_irq);
1940 set_irq_flags(j, IRQF_VALID);
1942 set_irq_chained_handler(bank->irq, gpio_irq_handler);
1943 set_irq_data(bank->irq, bank);
1945 if (cpu_is_omap34xx() || cpu_is_omap44xx()) {
1946 sprintf(clk_name, "gpio%d_dbck", i + 1);
1947 bank->dbck = clk_get(NULL, clk_name);
1948 if (IS_ERR(bank->dbck))
1949 printk(KERN_ERR "Could not get %s\n", clk_name);
1953 /* Enable system clock for GPIO module.
1954 * The CAM_CLK_CTRL *is* really the right place. */
1955 if (cpu_is_omap16xx())
1956 omap_writel(omap_readl(ULPD_CAM_CLK_CTRL) | 0x04, ULPD_CAM_CLK_CTRL);
1958 /* Enable autoidle for the OCP interface */
1959 if (cpu_is_omap24xx())
1960 omap_writel(1 << 0, 0x48019010);
1961 if (cpu_is_omap34xx())
1962 omap_writel(1 << 0, 0x48306814);
1964 omap_gpio_show_rev();
1969 #if defined(CONFIG_ARCH_OMAP16XX) || defined(CONFIG_ARCH_OMAP2PLUS)
1970 static int omap_gpio_suspend(struct sys_device *dev, pm_message_t mesg)
1974 if (!cpu_class_is_omap2() && !cpu_is_omap16xx())
1977 for (i = 0; i < gpio_bank_count; i++) {
1978 struct gpio_bank *bank = &gpio_bank[i];
1979 void __iomem *wake_status;
1980 void __iomem *wake_clear;
1981 void __iomem *wake_set;
1982 unsigned long flags;
1984 switch (bank->method) {
1985 #ifdef CONFIG_ARCH_OMAP16XX
1986 case METHOD_GPIO_1610:
1987 wake_status = bank->base + OMAP1610_GPIO_WAKEUPENABLE;
1988 wake_clear = bank->base + OMAP1610_GPIO_CLEAR_WAKEUPENA;
1989 wake_set = bank->base + OMAP1610_GPIO_SET_WAKEUPENA;
1992 #if defined(CONFIG_ARCH_OMAP2) || defined(CONFIG_ARCH_OMAP3)
1993 case METHOD_GPIO_24XX:
1994 wake_status = bank->base + OMAP24XX_GPIO_WAKE_EN;
1995 wake_clear = bank->base + OMAP24XX_GPIO_CLEARWKUENA;
1996 wake_set = bank->base + OMAP24XX_GPIO_SETWKUENA;
1999 #ifdef CONFIG_ARCH_OMAP4
2000 case METHOD_GPIO_44XX:
2001 wake_status = bank->base + OMAP4_GPIO_IRQWAKEN0;
2002 wake_clear = bank->base + OMAP4_GPIO_IRQWAKEN0;
2003 wake_set = bank->base + OMAP4_GPIO_IRQWAKEN0;
2010 spin_lock_irqsave(&bank->lock, flags);
2011 bank->saved_wakeup = __raw_readl(wake_status);
2012 __raw_writel(0xffffffff, wake_clear);
2013 __raw_writel(bank->suspend_wakeup, wake_set);
2014 spin_unlock_irqrestore(&bank->lock, flags);
2020 static int omap_gpio_resume(struct sys_device *dev)
2024 if (!cpu_class_is_omap2() && !cpu_is_omap16xx())
2027 for (i = 0; i < gpio_bank_count; i++) {
2028 struct gpio_bank *bank = &gpio_bank[i];
2029 void __iomem *wake_clear;
2030 void __iomem *wake_set;
2031 unsigned long flags;
2033 switch (bank->method) {
2034 #ifdef CONFIG_ARCH_OMAP16XX
2035 case METHOD_GPIO_1610:
2036 wake_clear = bank->base + OMAP1610_GPIO_CLEAR_WAKEUPENA;
2037 wake_set = bank->base + OMAP1610_GPIO_SET_WAKEUPENA;
2040 #if defined(CONFIG_ARCH_OMAP2) || defined(CONFIG_ARCH_OMAP3)
2041 case METHOD_GPIO_24XX:
2042 wake_clear = bank->base + OMAP24XX_GPIO_CLEARWKUENA;
2043 wake_set = bank->base + OMAP24XX_GPIO_SETWKUENA;
2046 #ifdef CONFIG_ARCH_OMAP4
2047 case METHOD_GPIO_44XX:
2048 wake_clear = bank->base + OMAP4_GPIO_IRQWAKEN0;
2049 wake_set = bank->base + OMAP4_GPIO_IRQWAKEN0;
2056 spin_lock_irqsave(&bank->lock, flags);
2057 __raw_writel(0xffffffff, wake_clear);
2058 __raw_writel(bank->saved_wakeup, wake_set);
2059 spin_unlock_irqrestore(&bank->lock, flags);
2065 static struct sysdev_class omap_gpio_sysclass = {
2067 .suspend = omap_gpio_suspend,
2068 .resume = omap_gpio_resume,
2071 static struct sys_device omap_gpio_device = {
2073 .cls = &omap_gpio_sysclass,
2078 #ifdef CONFIG_ARCH_OMAP2PLUS
2080 static int workaround_enabled;
2082 void omap2_gpio_prepare_for_idle(int power_state)
2087 if (cpu_is_omap34xx())
2090 for (i = min; i < gpio_bank_count; i++) {
2091 struct gpio_bank *bank = &gpio_bank[i];
2095 for (j = 0; j < hweight_long(bank->dbck_enable_mask); j++)
2096 clk_disable(bank->dbck);
2098 if (power_state > PWRDM_POWER_OFF)
2101 /* If going to OFF, remove triggering for all
2102 * non-wakeup GPIOs. Otherwise spurious IRQs will be
2103 * generated. See OMAP2420 Errata item 1.101. */
2104 if (!(bank->enabled_non_wakeup_gpios))
2107 if (cpu_is_omap24xx() || cpu_is_omap34xx()) {
2108 bank->saved_datain = __raw_readl(bank->base +
2109 OMAP24XX_GPIO_DATAIN);
2110 l1 = __raw_readl(bank->base +
2111 OMAP24XX_GPIO_FALLINGDETECT);
2112 l2 = __raw_readl(bank->base +
2113 OMAP24XX_GPIO_RISINGDETECT);
2116 if (cpu_is_omap44xx()) {
2117 bank->saved_datain = __raw_readl(bank->base +
2119 l1 = __raw_readl(bank->base +
2120 OMAP4_GPIO_FALLINGDETECT);
2121 l2 = __raw_readl(bank->base +
2122 OMAP4_GPIO_RISINGDETECT);
2125 bank->saved_fallingdetect = l1;
2126 bank->saved_risingdetect = l2;
2127 l1 &= ~bank->enabled_non_wakeup_gpios;
2128 l2 &= ~bank->enabled_non_wakeup_gpios;
2130 if (cpu_is_omap24xx() || cpu_is_omap34xx()) {
2131 __raw_writel(l1, bank->base +
2132 OMAP24XX_GPIO_FALLINGDETECT);
2133 __raw_writel(l2, bank->base +
2134 OMAP24XX_GPIO_RISINGDETECT);
2137 if (cpu_is_omap44xx()) {
2138 __raw_writel(l1, bank->base + OMAP4_GPIO_FALLINGDETECT);
2139 __raw_writel(l2, bank->base + OMAP4_GPIO_RISINGDETECT);
2145 workaround_enabled = 0;
2148 workaround_enabled = 1;
2151 void omap2_gpio_resume_after_idle(void)
2156 if (cpu_is_omap34xx())
2158 for (i = min; i < gpio_bank_count; i++) {
2159 struct gpio_bank *bank = &gpio_bank[i];
2160 u32 l = 0, gen, gen0, gen1;
2163 for (j = 0; j < hweight_long(bank->dbck_enable_mask); j++)
2164 clk_enable(bank->dbck);
2166 if (!workaround_enabled)
2169 if (!(bank->enabled_non_wakeup_gpios))
2172 if (cpu_is_omap24xx() || cpu_is_omap34xx()) {
2173 __raw_writel(bank->saved_fallingdetect,
2174 bank->base + OMAP24XX_GPIO_FALLINGDETECT);
2175 __raw_writel(bank->saved_risingdetect,
2176 bank->base + OMAP24XX_GPIO_RISINGDETECT);
2177 l = __raw_readl(bank->base + OMAP24XX_GPIO_DATAIN);
2180 if (cpu_is_omap44xx()) {
2181 __raw_writel(bank->saved_fallingdetect,
2182 bank->base + OMAP4_GPIO_FALLINGDETECT);
2183 __raw_writel(bank->saved_risingdetect,
2184 bank->base + OMAP4_GPIO_RISINGDETECT);
2185 l = __raw_readl(bank->base + OMAP4_GPIO_DATAIN);
2188 /* Check if any of the non-wakeup interrupt GPIOs have changed
2189 * state. If so, generate an IRQ by software. This is
2190 * horribly racy, but it's the best we can do to work around
2191 * this silicon bug. */
2192 l ^= bank->saved_datain;
2193 l &= bank->enabled_non_wakeup_gpios;
2196 * No need to generate IRQs for the rising edge for gpio IRQs
2197 * configured with falling edge only; and vice versa.
2199 gen0 = l & bank->saved_fallingdetect;
2200 gen0 &= bank->saved_datain;
2202 gen1 = l & bank->saved_risingdetect;
2203 gen1 &= ~(bank->saved_datain);
2205 /* FIXME: Consider GPIO IRQs with level detections properly! */
2206 gen = l & (~(bank->saved_fallingdetect) &
2207 ~(bank->saved_risingdetect));
2208 /* Consider all GPIO IRQs needed to be updated */
2214 if (cpu_is_omap24xx() || cpu_is_omap34xx()) {
2215 old0 = __raw_readl(bank->base +
2216 OMAP24XX_GPIO_LEVELDETECT0);
2217 old1 = __raw_readl(bank->base +
2218 OMAP24XX_GPIO_LEVELDETECT1);
2219 __raw_writel(old0 | gen, bank->base +
2220 OMAP24XX_GPIO_LEVELDETECT0);
2221 __raw_writel(old1 | gen, bank->base +
2222 OMAP24XX_GPIO_LEVELDETECT1);
2223 __raw_writel(old0, bank->base +
2224 OMAP24XX_GPIO_LEVELDETECT0);
2225 __raw_writel(old1, bank->base +
2226 OMAP24XX_GPIO_LEVELDETECT1);
2229 if (cpu_is_omap44xx()) {
2230 old0 = __raw_readl(bank->base +
2231 OMAP4_GPIO_LEVELDETECT0);
2232 old1 = __raw_readl(bank->base +
2233 OMAP4_GPIO_LEVELDETECT1);
2234 __raw_writel(old0 | l, bank->base +
2235 OMAP4_GPIO_LEVELDETECT0);
2236 __raw_writel(old1 | l, bank->base +
2237 OMAP4_GPIO_LEVELDETECT1);
2238 __raw_writel(old0, bank->base +
2239 OMAP4_GPIO_LEVELDETECT0);
2240 __raw_writel(old1, bank->base +
2241 OMAP4_GPIO_LEVELDETECT1);
2250 #ifdef CONFIG_ARCH_OMAP3
2251 /* save the registers of bank 2-6 */
2252 void omap_gpio_save_context(void)
2256 /* saving banks from 2-6 only since GPIO1 is in WKUP */
2257 for (i = 1; i < gpio_bank_count; i++) {
2258 struct gpio_bank *bank = &gpio_bank[i];
2259 gpio_context[i].sysconfig =
2260 __raw_readl(bank->base + OMAP24XX_GPIO_SYSCONFIG);
2261 gpio_context[i].irqenable1 =
2262 __raw_readl(bank->base + OMAP24XX_GPIO_IRQENABLE1);
2263 gpio_context[i].irqenable2 =
2264 __raw_readl(bank->base + OMAP24XX_GPIO_IRQENABLE2);
2265 gpio_context[i].wake_en =
2266 __raw_readl(bank->base + OMAP24XX_GPIO_WAKE_EN);
2267 gpio_context[i].ctrl =
2268 __raw_readl(bank->base + OMAP24XX_GPIO_CTRL);
2269 gpio_context[i].oe =
2270 __raw_readl(bank->base + OMAP24XX_GPIO_OE);
2271 gpio_context[i].leveldetect0 =
2272 __raw_readl(bank->base + OMAP24XX_GPIO_LEVELDETECT0);
2273 gpio_context[i].leveldetect1 =
2274 __raw_readl(bank->base + OMAP24XX_GPIO_LEVELDETECT1);
2275 gpio_context[i].risingdetect =
2276 __raw_readl(bank->base + OMAP24XX_GPIO_RISINGDETECT);
2277 gpio_context[i].fallingdetect =
2278 __raw_readl(bank->base + OMAP24XX_GPIO_FALLINGDETECT);
2279 gpio_context[i].dataout =
2280 __raw_readl(bank->base + OMAP24XX_GPIO_DATAOUT);
2284 /* restore the required registers of bank 2-6 */
2285 void omap_gpio_restore_context(void)
2289 for (i = 1; i < gpio_bank_count; i++) {
2290 struct gpio_bank *bank = &gpio_bank[i];
2291 __raw_writel(gpio_context[i].sysconfig,
2292 bank->base + OMAP24XX_GPIO_SYSCONFIG);
2293 __raw_writel(gpio_context[i].irqenable1,
2294 bank->base + OMAP24XX_GPIO_IRQENABLE1);
2295 __raw_writel(gpio_context[i].irqenable2,
2296 bank->base + OMAP24XX_GPIO_IRQENABLE2);
2297 __raw_writel(gpio_context[i].wake_en,
2298 bank->base + OMAP24XX_GPIO_WAKE_EN);
2299 __raw_writel(gpio_context[i].ctrl,
2300 bank->base + OMAP24XX_GPIO_CTRL);
2301 __raw_writel(gpio_context[i].oe,
2302 bank->base + OMAP24XX_GPIO_OE);
2303 __raw_writel(gpio_context[i].leveldetect0,
2304 bank->base + OMAP24XX_GPIO_LEVELDETECT0);
2305 __raw_writel(gpio_context[i].leveldetect1,
2306 bank->base + OMAP24XX_GPIO_LEVELDETECT1);
2307 __raw_writel(gpio_context[i].risingdetect,
2308 bank->base + OMAP24XX_GPIO_RISINGDETECT);
2309 __raw_writel(gpio_context[i].fallingdetect,
2310 bank->base + OMAP24XX_GPIO_FALLINGDETECT);
2311 __raw_writel(gpio_context[i].dataout,
2312 bank->base + OMAP24XX_GPIO_DATAOUT);
2318 * This may get called early from board specific init
2319 * for boards that have interrupts routed via FPGA.
2321 int __init omap_gpio_init(void)
2324 return _omap_gpio_init();
2329 static int __init omap_gpio_sysinit(void)
2334 ret = _omap_gpio_init();
2338 #if defined(CONFIG_ARCH_OMAP16XX) || defined(CONFIG_ARCH_OMAP2PLUS)
2339 if (cpu_is_omap16xx() || cpu_class_is_omap2()) {
2341 ret = sysdev_class_register(&omap_gpio_sysclass);
2343 ret = sysdev_register(&omap_gpio_device);
2351 arch_initcall(omap_gpio_sysinit);