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 * This program is free software; you can redistribute it and/or modify
10 * it under the terms of the GNU General Public License version 2 as
11 * published by the Free Software Foundation.
14 #include <linux/init.h>
15 #include <linux/module.h>
16 #include <linux/sched.h>
17 #include <linux/interrupt.h>
18 #include <linux/ptrace.h>
19 #include <linux/sysdev.h>
20 #include <linux/err.h>
21 #include <linux/clk.h>
23 #include <asm/hardware.h>
25 #include <asm/arch/irqs.h>
26 #include <asm/arch/gpio.h>
27 #include <asm/mach/irq.h>
32 * OMAP1510 GPIO registers
34 #define OMAP1510_GPIO_BASE (void __iomem *)0xfffce000
35 #define OMAP1510_GPIO_DATA_INPUT 0x00
36 #define OMAP1510_GPIO_DATA_OUTPUT 0x04
37 #define OMAP1510_GPIO_DIR_CONTROL 0x08
38 #define OMAP1510_GPIO_INT_CONTROL 0x0c
39 #define OMAP1510_GPIO_INT_MASK 0x10
40 #define OMAP1510_GPIO_INT_STATUS 0x14
41 #define OMAP1510_GPIO_PIN_CONTROL 0x18
43 #define OMAP1510_IH_GPIO_BASE 64
46 * OMAP1610 specific GPIO registers
48 #define OMAP1610_GPIO1_BASE (void __iomem *)0xfffbe400
49 #define OMAP1610_GPIO2_BASE (void __iomem *)0xfffbec00
50 #define OMAP1610_GPIO3_BASE (void __iomem *)0xfffbb400
51 #define OMAP1610_GPIO4_BASE (void __iomem *)0xfffbbc00
52 #define OMAP1610_GPIO_REVISION 0x0000
53 #define OMAP1610_GPIO_SYSCONFIG 0x0010
54 #define OMAP1610_GPIO_SYSSTATUS 0x0014
55 #define OMAP1610_GPIO_IRQSTATUS1 0x0018
56 #define OMAP1610_GPIO_IRQENABLE1 0x001c
57 #define OMAP1610_GPIO_WAKEUPENABLE 0x0028
58 #define OMAP1610_GPIO_DATAIN 0x002c
59 #define OMAP1610_GPIO_DATAOUT 0x0030
60 #define OMAP1610_GPIO_DIRECTION 0x0034
61 #define OMAP1610_GPIO_EDGE_CTRL1 0x0038
62 #define OMAP1610_GPIO_EDGE_CTRL2 0x003c
63 #define OMAP1610_GPIO_CLEAR_IRQENABLE1 0x009c
64 #define OMAP1610_GPIO_CLEAR_WAKEUPENA 0x00a8
65 #define OMAP1610_GPIO_CLEAR_DATAOUT 0x00b0
66 #define OMAP1610_GPIO_SET_IRQENABLE1 0x00dc
67 #define OMAP1610_GPIO_SET_WAKEUPENA 0x00e8
68 #define OMAP1610_GPIO_SET_DATAOUT 0x00f0
71 * OMAP730 specific GPIO registers
73 #define OMAP730_GPIO1_BASE (void __iomem *)0xfffbc000
74 #define OMAP730_GPIO2_BASE (void __iomem *)0xfffbc800
75 #define OMAP730_GPIO3_BASE (void __iomem *)0xfffbd000
76 #define OMAP730_GPIO4_BASE (void __iomem *)0xfffbd800
77 #define OMAP730_GPIO5_BASE (void __iomem *)0xfffbe000
78 #define OMAP730_GPIO6_BASE (void __iomem *)0xfffbe800
79 #define OMAP730_GPIO_DATA_INPUT 0x00
80 #define OMAP730_GPIO_DATA_OUTPUT 0x04
81 #define OMAP730_GPIO_DIR_CONTROL 0x08
82 #define OMAP730_GPIO_INT_CONTROL 0x0c
83 #define OMAP730_GPIO_INT_MASK 0x10
84 #define OMAP730_GPIO_INT_STATUS 0x14
87 * omap24xx specific GPIO registers
89 #define OMAP24XX_GPIO1_BASE (void __iomem *)0x48018000
90 #define OMAP24XX_GPIO2_BASE (void __iomem *)0x4801a000
91 #define OMAP24XX_GPIO3_BASE (void __iomem *)0x4801c000
92 #define OMAP24XX_GPIO4_BASE (void __iomem *)0x4801e000
93 #define OMAP24XX_GPIO_REVISION 0x0000
94 #define OMAP24XX_GPIO_SYSCONFIG 0x0010
95 #define OMAP24XX_GPIO_SYSSTATUS 0x0014
96 #define OMAP24XX_GPIO_IRQSTATUS1 0x0018
97 #define OMAP24XX_GPIO_IRQENABLE1 0x001c
98 #define OMAP24XX_GPIO_CTRL 0x0030
99 #define OMAP24XX_GPIO_OE 0x0034
100 #define OMAP24XX_GPIO_DATAIN 0x0038
101 #define OMAP24XX_GPIO_DATAOUT 0x003c
102 #define OMAP24XX_GPIO_LEVELDETECT0 0x0040
103 #define OMAP24XX_GPIO_LEVELDETECT1 0x0044
104 #define OMAP24XX_GPIO_RISINGDETECT 0x0048
105 #define OMAP24XX_GPIO_FALLINGDETECT 0x004c
106 #define OMAP24XX_GPIO_CLEARIRQENABLE1 0x0060
107 #define OMAP24XX_GPIO_SETIRQENABLE1 0x0064
108 #define OMAP24XX_GPIO_CLEARWKUENA 0x0080
109 #define OMAP24XX_GPIO_SETWKUENA 0x0084
110 #define OMAP24XX_GPIO_CLEARDATAOUT 0x0090
111 #define OMAP24XX_GPIO_SETDATAOUT 0x0094
113 #define OMAP_MPUIO_MASK (~OMAP_MAX_GPIO_LINES & 0xff)
118 u16 virtual_irq_start;
126 #define METHOD_MPUIO 0
127 #define METHOD_GPIO_1510 1
128 #define METHOD_GPIO_1610 2
129 #define METHOD_GPIO_730 3
130 #define METHOD_GPIO_24XX 4
132 #ifdef CONFIG_ARCH_OMAP16XX
133 static struct gpio_bank gpio_bank_1610[5] = {
134 { OMAP_MPUIO_BASE, INT_MPUIO, IH_MPUIO_BASE, METHOD_MPUIO},
135 { OMAP1610_GPIO1_BASE, INT_GPIO_BANK1, IH_GPIO_BASE, METHOD_GPIO_1610 },
136 { OMAP1610_GPIO2_BASE, INT_1610_GPIO_BANK2, IH_GPIO_BASE + 16, METHOD_GPIO_1610 },
137 { OMAP1610_GPIO3_BASE, INT_1610_GPIO_BANK3, IH_GPIO_BASE + 32, METHOD_GPIO_1610 },
138 { OMAP1610_GPIO4_BASE, INT_1610_GPIO_BANK4, IH_GPIO_BASE + 48, METHOD_GPIO_1610 },
142 #ifdef CONFIG_ARCH_OMAP15XX
143 static struct gpio_bank gpio_bank_1510[2] = {
144 { OMAP_MPUIO_BASE, INT_MPUIO, IH_MPUIO_BASE, METHOD_MPUIO },
145 { OMAP1510_GPIO_BASE, INT_GPIO_BANK1, IH_GPIO_BASE, METHOD_GPIO_1510 }
149 #ifdef CONFIG_ARCH_OMAP730
150 static struct gpio_bank gpio_bank_730[7] = {
151 { OMAP_MPUIO_BASE, INT_730_MPUIO, IH_MPUIO_BASE, METHOD_MPUIO },
152 { OMAP730_GPIO1_BASE, INT_730_GPIO_BANK1, IH_GPIO_BASE, METHOD_GPIO_730 },
153 { OMAP730_GPIO2_BASE, INT_730_GPIO_BANK2, IH_GPIO_BASE + 32, METHOD_GPIO_730 },
154 { OMAP730_GPIO3_BASE, INT_730_GPIO_BANK3, IH_GPIO_BASE + 64, METHOD_GPIO_730 },
155 { OMAP730_GPIO4_BASE, INT_730_GPIO_BANK4, IH_GPIO_BASE + 96, METHOD_GPIO_730 },
156 { OMAP730_GPIO5_BASE, INT_730_GPIO_BANK5, IH_GPIO_BASE + 128, METHOD_GPIO_730 },
157 { OMAP730_GPIO6_BASE, INT_730_GPIO_BANK6, IH_GPIO_BASE + 160, METHOD_GPIO_730 },
161 #ifdef CONFIG_ARCH_OMAP24XX
162 static struct gpio_bank gpio_bank_24xx[4] = {
163 { OMAP24XX_GPIO1_BASE, INT_24XX_GPIO_BANK1, IH_GPIO_BASE, METHOD_GPIO_24XX },
164 { OMAP24XX_GPIO2_BASE, INT_24XX_GPIO_BANK2, IH_GPIO_BASE + 32, METHOD_GPIO_24XX },
165 { OMAP24XX_GPIO3_BASE, INT_24XX_GPIO_BANK3, IH_GPIO_BASE + 64, METHOD_GPIO_24XX },
166 { OMAP24XX_GPIO4_BASE, INT_24XX_GPIO_BANK4, IH_GPIO_BASE + 96, METHOD_GPIO_24XX },
170 static struct gpio_bank *gpio_bank;
171 static int gpio_bank_count;
173 static inline struct gpio_bank *get_gpio_bank(int gpio)
175 #ifdef CONFIG_ARCH_OMAP15XX
176 if (cpu_is_omap15xx()) {
177 if (OMAP_GPIO_IS_MPUIO(gpio))
178 return &gpio_bank[0];
179 return &gpio_bank[1];
182 #if defined(CONFIG_ARCH_OMAP16XX)
183 if (cpu_is_omap16xx()) {
184 if (OMAP_GPIO_IS_MPUIO(gpio))
185 return &gpio_bank[0];
186 return &gpio_bank[1 + (gpio >> 4)];
189 #ifdef CONFIG_ARCH_OMAP730
190 if (cpu_is_omap730()) {
191 if (OMAP_GPIO_IS_MPUIO(gpio))
192 return &gpio_bank[0];
193 return &gpio_bank[1 + (gpio >> 5)];
196 #ifdef CONFIG_ARCH_OMAP24XX
197 if (cpu_is_omap24xx())
198 return &gpio_bank[gpio >> 5];
202 static inline int get_gpio_index(int gpio)
204 #ifdef CONFIG_ARCH_OMAP730
205 if (cpu_is_omap730())
208 #ifdef CONFIG_ARCH_OMAP24XX
209 if (cpu_is_omap24xx())
215 static inline int gpio_valid(int gpio)
219 if (OMAP_GPIO_IS_MPUIO(gpio)) {
220 if ((gpio & OMAP_MPUIO_MASK) > 16)
224 #ifdef CONFIG_ARCH_OMAP15XX
225 if (cpu_is_omap15xx() && gpio < 16)
228 #if defined(CONFIG_ARCH_OMAP16XX)
229 if ((cpu_is_omap16xx()) && gpio < 64)
232 #ifdef CONFIG_ARCH_OMAP730
233 if (cpu_is_omap730() && gpio < 192)
236 #ifdef CONFIG_ARCH_OMAP24XX
237 if (cpu_is_omap24xx() && gpio < 128)
243 static int check_gpio(int gpio)
245 if (unlikely(gpio_valid(gpio)) < 0) {
246 printk(KERN_ERR "omap-gpio: invalid GPIO %d\n", gpio);
253 static void _set_gpio_direction(struct gpio_bank *bank, int gpio, int is_input)
255 void __iomem *reg = bank->base;
258 switch (bank->method) {
260 reg += OMAP_MPUIO_IO_CNTL;
262 case METHOD_GPIO_1510:
263 reg += OMAP1510_GPIO_DIR_CONTROL;
265 case METHOD_GPIO_1610:
266 reg += OMAP1610_GPIO_DIRECTION;
268 case METHOD_GPIO_730:
269 reg += OMAP730_GPIO_DIR_CONTROL;
271 case METHOD_GPIO_24XX:
272 reg += OMAP24XX_GPIO_OE;
275 l = __raw_readl(reg);
280 __raw_writel(l, reg);
283 void omap_set_gpio_direction(int gpio, int is_input)
285 struct gpio_bank *bank;
287 if (check_gpio(gpio) < 0)
289 bank = get_gpio_bank(gpio);
290 spin_lock(&bank->lock);
291 _set_gpio_direction(bank, get_gpio_index(gpio), is_input);
292 spin_unlock(&bank->lock);
295 static void _set_gpio_dataout(struct gpio_bank *bank, int gpio, int enable)
297 void __iomem *reg = bank->base;
300 switch (bank->method) {
302 reg += OMAP_MPUIO_OUTPUT;
303 l = __raw_readl(reg);
309 case METHOD_GPIO_1510:
310 reg += OMAP1510_GPIO_DATA_OUTPUT;
311 l = __raw_readl(reg);
317 case METHOD_GPIO_1610:
319 reg += OMAP1610_GPIO_SET_DATAOUT;
321 reg += OMAP1610_GPIO_CLEAR_DATAOUT;
324 case METHOD_GPIO_730:
325 reg += OMAP730_GPIO_DATA_OUTPUT;
326 l = __raw_readl(reg);
332 case METHOD_GPIO_24XX:
334 reg += OMAP24XX_GPIO_SETDATAOUT;
336 reg += OMAP24XX_GPIO_CLEARDATAOUT;
343 __raw_writel(l, reg);
346 void omap_set_gpio_dataout(int gpio, int enable)
348 struct gpio_bank *bank;
350 if (check_gpio(gpio) < 0)
352 bank = get_gpio_bank(gpio);
353 spin_lock(&bank->lock);
354 _set_gpio_dataout(bank, get_gpio_index(gpio), enable);
355 spin_unlock(&bank->lock);
358 int omap_get_gpio_datain(int gpio)
360 struct gpio_bank *bank;
363 if (check_gpio(gpio) < 0)
365 bank = get_gpio_bank(gpio);
367 switch (bank->method) {
369 reg += OMAP_MPUIO_INPUT_LATCH;
371 case METHOD_GPIO_1510:
372 reg += OMAP1510_GPIO_DATA_INPUT;
374 case METHOD_GPIO_1610:
375 reg += OMAP1610_GPIO_DATAIN;
377 case METHOD_GPIO_730:
378 reg += OMAP730_GPIO_DATA_INPUT;
380 case METHOD_GPIO_24XX:
381 reg += OMAP24XX_GPIO_DATAIN;
387 return (__raw_readl(reg)
388 & (1 << get_gpio_index(gpio))) != 0;
391 #define MOD_REG_BIT(reg, bit_mask, set) \
393 int l = __raw_readl(base + reg); \
394 if (set) l |= bit_mask; \
395 else l &= ~bit_mask; \
396 __raw_writel(l, base + reg); \
399 static inline void set_24xx_gpio_triggering(void __iomem *base, int gpio, int trigger)
401 u32 gpio_bit = 1 << gpio;
403 MOD_REG_BIT(OMAP24XX_GPIO_LEVELDETECT0, gpio_bit,
404 trigger & __IRQT_LOWLVL);
405 MOD_REG_BIT(OMAP24XX_GPIO_LEVELDETECT1, gpio_bit,
406 trigger & __IRQT_HIGHLVL);
407 MOD_REG_BIT(OMAP24XX_GPIO_RISINGDETECT, gpio_bit,
408 trigger & __IRQT_RISEDGE);
409 MOD_REG_BIT(OMAP24XX_GPIO_FALLINGDETECT, gpio_bit,
410 trigger & __IRQT_FALEDGE);
411 /* FIXME: Possibly do 'set_irq_handler(j, do_level_IRQ)' if only level
412 * triggering requested. */
415 static int _set_gpio_triggering(struct gpio_bank *bank, int gpio, int trigger)
417 void __iomem *reg = bank->base;
420 switch (bank->method) {
422 reg += OMAP_MPUIO_GPIO_INT_EDGE;
423 l = __raw_readl(reg);
424 if (trigger & __IRQT_RISEDGE)
426 else if (trigger & __IRQT_FALEDGE)
431 case METHOD_GPIO_1510:
432 reg += OMAP1510_GPIO_INT_CONTROL;
433 l = __raw_readl(reg);
434 if (trigger & __IRQT_RISEDGE)
436 else if (trigger & __IRQT_FALEDGE)
441 case METHOD_GPIO_1610:
443 reg += OMAP1610_GPIO_EDGE_CTRL2;
445 reg += OMAP1610_GPIO_EDGE_CTRL1;
447 /* We allow only edge triggering, i.e. two lowest bits */
448 if (trigger & (__IRQT_LOWLVL | __IRQT_HIGHLVL))
450 l = __raw_readl(reg);
451 l &= ~(3 << (gpio << 1));
452 if (trigger & __IRQT_RISEDGE)
453 l |= 2 << (gpio << 1);
454 if (trigger & __IRQT_FALEDGE)
455 l |= 1 << (gpio << 1);
457 case METHOD_GPIO_730:
458 reg += OMAP730_GPIO_INT_CONTROL;
459 l = __raw_readl(reg);
460 if (trigger & __IRQT_RISEDGE)
462 else if (trigger & __IRQT_FALEDGE)
467 case METHOD_GPIO_24XX:
468 set_24xx_gpio_triggering(reg, gpio, trigger);
474 __raw_writel(l, reg);
480 static int gpio_irq_type(unsigned irq, unsigned type)
482 struct gpio_bank *bank;
486 if (irq > IH_MPUIO_BASE)
487 gpio = OMAP_MPUIO(irq - IH_MPUIO_BASE);
489 gpio = irq - IH_GPIO_BASE;
491 if (check_gpio(gpio) < 0)
494 if (type & IRQT_PROBE)
496 if (!cpu_is_omap24xx() && (type & (__IRQT_LOWLVL|__IRQT_HIGHLVL)))
499 bank = get_gpio_bank(gpio);
500 spin_lock(&bank->lock);
501 retval = _set_gpio_triggering(bank, get_gpio_index(gpio), type);
502 spin_unlock(&bank->lock);
506 static void _clear_gpio_irqbank(struct gpio_bank *bank, int gpio_mask)
508 void __iomem *reg = bank->base;
510 switch (bank->method) {
512 /* MPUIO irqstatus is reset by reading the status register,
513 * so do nothing here */
515 case METHOD_GPIO_1510:
516 reg += OMAP1510_GPIO_INT_STATUS;
518 case METHOD_GPIO_1610:
519 reg += OMAP1610_GPIO_IRQSTATUS1;
521 case METHOD_GPIO_730:
522 reg += OMAP730_GPIO_INT_STATUS;
524 case METHOD_GPIO_24XX:
525 reg += OMAP24XX_GPIO_IRQSTATUS1;
531 __raw_writel(gpio_mask, reg);
534 static inline void _clear_gpio_irqstatus(struct gpio_bank *bank, int gpio)
536 _clear_gpio_irqbank(bank, 1 << get_gpio_index(gpio));
539 static u32 _get_gpio_irqbank_mask(struct gpio_bank *bank)
541 void __iomem *reg = bank->base;
546 switch (bank->method) {
548 reg += OMAP_MPUIO_GPIO_MASKIT;
552 case METHOD_GPIO_1510:
553 reg += OMAP1510_GPIO_INT_MASK;
557 case METHOD_GPIO_1610:
558 reg += OMAP1610_GPIO_IRQENABLE1;
561 case METHOD_GPIO_730:
562 reg += OMAP730_GPIO_INT_MASK;
566 case METHOD_GPIO_24XX:
567 reg += OMAP24XX_GPIO_IRQENABLE1;
575 l = __raw_readl(reg);
582 static void _enable_gpio_irqbank(struct gpio_bank *bank, int gpio_mask, int enable)
584 void __iomem *reg = bank->base;
587 switch (bank->method) {
589 reg += OMAP_MPUIO_GPIO_MASKIT;
590 l = __raw_readl(reg);
596 case METHOD_GPIO_1510:
597 reg += OMAP1510_GPIO_INT_MASK;
598 l = __raw_readl(reg);
604 case METHOD_GPIO_1610:
606 reg += OMAP1610_GPIO_SET_IRQENABLE1;
608 reg += OMAP1610_GPIO_CLEAR_IRQENABLE1;
611 case METHOD_GPIO_730:
612 reg += OMAP730_GPIO_INT_MASK;
613 l = __raw_readl(reg);
619 case METHOD_GPIO_24XX:
621 reg += OMAP24XX_GPIO_SETIRQENABLE1;
623 reg += OMAP24XX_GPIO_CLEARIRQENABLE1;
630 __raw_writel(l, reg);
633 static inline void _set_gpio_irqenable(struct gpio_bank *bank, int gpio, int enable)
635 _enable_gpio_irqbank(bank, 1 << get_gpio_index(gpio), enable);
639 * Note that ENAWAKEUP needs to be enabled in GPIO_SYSCONFIG register.
640 * 1510 does not seem to have a wake-up register. If JTAG is connected
641 * to the target, system will wake up always on GPIO events. While
642 * system is running all registered GPIO interrupts need to have wake-up
643 * enabled. When system is suspended, only selected GPIO interrupts need
644 * to have wake-up enabled.
646 static int _set_gpio_wakeup(struct gpio_bank *bank, int gpio, int enable)
648 switch (bank->method) {
649 case METHOD_GPIO_1610:
650 case METHOD_GPIO_24XX:
651 spin_lock(&bank->lock);
653 bank->suspend_wakeup |= (1 << gpio);
655 bank->suspend_wakeup &= ~(1 << gpio);
656 spin_unlock(&bank->lock);
659 printk(KERN_ERR "Can't enable GPIO wakeup for method %i\n",
665 /* Use disable_irq_wake() and enable_irq_wake() functions from drivers */
666 static int gpio_wake_enable(unsigned int irq, unsigned int enable)
668 unsigned int gpio = irq - IH_GPIO_BASE;
669 struct gpio_bank *bank;
672 if (check_gpio(gpio) < 0)
674 bank = get_gpio_bank(gpio);
675 spin_lock(&bank->lock);
676 retval = _set_gpio_wakeup(bank, get_gpio_index(gpio), enable);
677 spin_unlock(&bank->lock);
682 int omap_request_gpio(int gpio)
684 struct gpio_bank *bank;
686 if (check_gpio(gpio) < 0)
689 bank = get_gpio_bank(gpio);
690 spin_lock(&bank->lock);
691 if (unlikely(bank->reserved_map & (1 << get_gpio_index(gpio)))) {
692 printk(KERN_ERR "omap-gpio: GPIO %d is already reserved!\n", gpio);
694 spin_unlock(&bank->lock);
697 bank->reserved_map |= (1 << get_gpio_index(gpio));
699 /* Set trigger to none. You need to enable the trigger after request_irq */
700 _set_gpio_triggering(bank, get_gpio_index(gpio), IRQT_NOEDGE);
702 #ifdef CONFIG_ARCH_OMAP15XX
703 if (bank->method == METHOD_GPIO_1510) {
706 /* Claim the pin for MPU */
707 reg = bank->base + OMAP1510_GPIO_PIN_CONTROL;
708 __raw_writel(__raw_readl(reg) | (1 << get_gpio_index(gpio)), reg);
711 #ifdef CONFIG_ARCH_OMAP16XX
712 if (bank->method == METHOD_GPIO_1610) {
713 /* Enable wake-up during idle for dynamic tick */
714 void __iomem *reg = bank->base + OMAP1610_GPIO_SET_WAKEUPENA;
715 __raw_writel(1 << get_gpio_index(gpio), reg);
718 #ifdef CONFIG_ARCH_OMAP24XX
719 if (bank->method == METHOD_GPIO_24XX) {
720 /* Enable wake-up during idle for dynamic tick */
721 void __iomem *reg = bank->base + OMAP24XX_GPIO_SETWKUENA;
722 __raw_writel(1 << get_gpio_index(gpio), reg);
725 spin_unlock(&bank->lock);
730 void omap_free_gpio(int gpio)
732 struct gpio_bank *bank;
734 if (check_gpio(gpio) < 0)
736 bank = get_gpio_bank(gpio);
737 spin_lock(&bank->lock);
738 if (unlikely(!(bank->reserved_map & (1 << get_gpio_index(gpio))))) {
739 printk(KERN_ERR "omap-gpio: GPIO %d wasn't reserved!\n", gpio);
741 spin_unlock(&bank->lock);
744 #ifdef CONFIG_ARCH_OMAP16XX
745 if (bank->method == METHOD_GPIO_1610) {
746 /* Disable wake-up during idle for dynamic tick */
747 void __iomem *reg = bank->base + OMAP1610_GPIO_CLEAR_WAKEUPENA;
748 __raw_writel(1 << get_gpio_index(gpio), reg);
751 #ifdef CONFIG_ARCH_OMAP24XX
752 if (bank->method == METHOD_GPIO_24XX) {
753 /* Disable wake-up during idle for dynamic tick */
754 void __iomem *reg = bank->base + OMAP24XX_GPIO_CLEARWKUENA;
755 __raw_writel(1 << get_gpio_index(gpio), reg);
758 bank->reserved_map &= ~(1 << get_gpio_index(gpio));
759 _set_gpio_direction(bank, get_gpio_index(gpio), 1);
760 _set_gpio_irqenable(bank, gpio, 0);
761 _clear_gpio_irqstatus(bank, gpio);
762 spin_unlock(&bank->lock);
766 * We need to unmask the GPIO bank interrupt as soon as possible to
767 * avoid missing GPIO interrupts for other lines in the bank.
768 * Then we need to mask-read-clear-unmask the triggered GPIO lines
769 * in the bank to avoid missing nested interrupts for a GPIO line.
770 * If we wait to unmask individual GPIO lines in the bank after the
771 * line's interrupt handler has been run, we may miss some nested
774 static void gpio_irq_handler(unsigned int irq, struct irqdesc *desc,
775 struct pt_regs *regs)
777 void __iomem *isr_reg = NULL;
779 unsigned int gpio_irq;
780 struct gpio_bank *bank;
784 desc->chip->ack(irq);
786 bank = get_irq_data(irq);
787 if (bank->method == METHOD_MPUIO)
788 isr_reg = bank->base + OMAP_MPUIO_GPIO_INT;
789 #ifdef CONFIG_ARCH_OMAP15XX
790 if (bank->method == METHOD_GPIO_1510)
791 isr_reg = bank->base + OMAP1510_GPIO_INT_STATUS;
793 #if defined(CONFIG_ARCH_OMAP16XX)
794 if (bank->method == METHOD_GPIO_1610)
795 isr_reg = bank->base + OMAP1610_GPIO_IRQSTATUS1;
797 #ifdef CONFIG_ARCH_OMAP730
798 if (bank->method == METHOD_GPIO_730)
799 isr_reg = bank->base + OMAP730_GPIO_INT_STATUS;
801 #ifdef CONFIG_ARCH_OMAP24XX
802 if (bank->method == METHOD_GPIO_24XX)
803 isr_reg = bank->base + OMAP24XX_GPIO_IRQSTATUS1;
806 u32 isr_saved, level_mask = 0;
809 enabled = _get_gpio_irqbank_mask(bank);
810 isr_saved = isr = __raw_readl(isr_reg) & enabled;
812 if (cpu_is_omap15xx() && (bank->method == METHOD_MPUIO))
815 if (cpu_is_omap24xx()) {
817 __raw_readl(bank->base +
818 OMAP24XX_GPIO_LEVELDETECT0) |
819 __raw_readl(bank->base +
820 OMAP24XX_GPIO_LEVELDETECT1);
821 level_mask &= enabled;
824 /* clear edge sensitive interrupts before handler(s) are
825 called so that we don't miss any interrupt occurred while
827 _enable_gpio_irqbank(bank, isr_saved & ~level_mask, 0);
828 _clear_gpio_irqbank(bank, isr_saved & ~level_mask);
829 _enable_gpio_irqbank(bank, isr_saved & ~level_mask, 1);
831 /* if there is only edge sensitive GPIO pin interrupts
832 configured, we could unmask GPIO bank interrupt immediately */
833 if (!level_mask && !unmasked) {
835 desc->chip->unmask(irq);
843 gpio_irq = bank->virtual_irq_start;
844 for (; isr != 0; isr >>= 1, gpio_irq++) {
849 d = irq_desc + gpio_irq;
850 /* Don't run the handler if it's already running
851 * or was disabled lazely.
853 if (unlikely((d->depth ||
854 (d->status & IRQ_INPROGRESS)))) {
856 (gpio_irq - bank->virtual_irq_start);
857 /* The unmasking will be done by
858 * enable_irq in case it is disabled or
859 * after returning from the handler if
860 * it's already running.
862 _enable_gpio_irqbank(bank, irq_mask, 0);
864 /* Level triggered interrupts
865 * won't ever be reentered
867 BUG_ON(level_mask & irq_mask);
868 d->status |= IRQ_PENDING;
873 desc_handle_irq(gpio_irq, d, regs);
875 if (unlikely((d->status & IRQ_PENDING) && !d->depth)) {
877 (gpio_irq - bank->virtual_irq_start);
878 d->status &= ~IRQ_PENDING;
879 _enable_gpio_irqbank(bank, irq_mask, 1);
880 retrigger |= irq_mask;
884 if (cpu_is_omap24xx()) {
885 /* clear level sensitive interrupts after handler(s) */
886 _enable_gpio_irqbank(bank, isr_saved & level_mask, 0);
887 _clear_gpio_irqbank(bank, isr_saved & level_mask);
888 _enable_gpio_irqbank(bank, isr_saved & level_mask, 1);
892 /* if bank has any level sensitive GPIO pin interrupt
893 configured, we must unmask the bank interrupt only after
894 handler(s) are executed in order to avoid spurious bank
897 desc->chip->unmask(irq);
901 static void gpio_ack_irq(unsigned int irq)
903 unsigned int gpio = irq - IH_GPIO_BASE;
904 struct gpio_bank *bank = get_gpio_bank(gpio);
906 _clear_gpio_irqstatus(bank, gpio);
909 static void gpio_mask_irq(unsigned int irq)
911 unsigned int gpio = irq - IH_GPIO_BASE;
912 struct gpio_bank *bank = get_gpio_bank(gpio);
914 _set_gpio_irqenable(bank, gpio, 0);
917 static void gpio_unmask_irq(unsigned int irq)
919 unsigned int gpio = irq - IH_GPIO_BASE;
920 unsigned int gpio_idx = get_gpio_index(gpio);
921 struct gpio_bank *bank = get_gpio_bank(gpio);
923 _set_gpio_irqenable(bank, gpio_idx, 1);
926 static void mpuio_ack_irq(unsigned int irq)
928 /* The ISR is reset automatically, so do nothing here. */
931 static void mpuio_mask_irq(unsigned int irq)
933 unsigned int gpio = OMAP_MPUIO(irq - IH_MPUIO_BASE);
934 struct gpio_bank *bank = get_gpio_bank(gpio);
936 _set_gpio_irqenable(bank, gpio, 0);
939 static void mpuio_unmask_irq(unsigned int irq)
941 unsigned int gpio = OMAP_MPUIO(irq - IH_MPUIO_BASE);
942 struct gpio_bank *bank = get_gpio_bank(gpio);
944 _set_gpio_irqenable(bank, gpio, 1);
947 static struct irq_chip gpio_irq_chip = {
950 .mask = gpio_mask_irq,
951 .unmask = gpio_unmask_irq,
952 .set_type = gpio_irq_type,
953 .set_wake = gpio_wake_enable,
956 static struct irq_chip mpuio_irq_chip = {
958 .ack = mpuio_ack_irq,
959 .mask = mpuio_mask_irq,
960 .unmask = mpuio_unmask_irq
963 static int initialized;
964 static struct clk * gpio_ick;
965 static struct clk * gpio_fck;
967 static int __init _omap_gpio_init(void)
970 struct gpio_bank *bank;
974 if (cpu_is_omap15xx()) {
975 gpio_ick = clk_get(NULL, "arm_gpio_ck");
976 if (IS_ERR(gpio_ick))
977 printk("Could not get arm_gpio_ck\n");
979 clk_enable(gpio_ick);
981 if (cpu_is_omap24xx()) {
982 gpio_ick = clk_get(NULL, "gpios_ick");
983 if (IS_ERR(gpio_ick))
984 printk("Could not get gpios_ick\n");
986 clk_enable(gpio_ick);
987 gpio_fck = clk_get(NULL, "gpios_fck");
988 if (IS_ERR(gpio_ick))
989 printk("Could not get gpios_fck\n");
991 clk_enable(gpio_fck);
994 #ifdef CONFIG_ARCH_OMAP15XX
995 if (cpu_is_omap15xx()) {
996 printk(KERN_INFO "OMAP1510 GPIO hardware\n");
998 gpio_bank = gpio_bank_1510;
1001 #if defined(CONFIG_ARCH_OMAP16XX)
1002 if (cpu_is_omap16xx()) {
1005 gpio_bank_count = 5;
1006 gpio_bank = gpio_bank_1610;
1007 rev = omap_readw(gpio_bank[1].base + OMAP1610_GPIO_REVISION);
1008 printk(KERN_INFO "OMAP GPIO hardware version %d.%d\n",
1009 (rev >> 4) & 0x0f, rev & 0x0f);
1012 #ifdef CONFIG_ARCH_OMAP730
1013 if (cpu_is_omap730()) {
1014 printk(KERN_INFO "OMAP730 GPIO hardware\n");
1015 gpio_bank_count = 7;
1016 gpio_bank = gpio_bank_730;
1019 #ifdef CONFIG_ARCH_OMAP24XX
1020 if (cpu_is_omap24xx()) {
1023 gpio_bank_count = 4;
1024 gpio_bank = gpio_bank_24xx;
1025 rev = omap_readl(gpio_bank[0].base + OMAP24XX_GPIO_REVISION);
1026 printk(KERN_INFO "OMAP24xx GPIO hardware version %d.%d\n",
1027 (rev >> 4) & 0x0f, rev & 0x0f);
1030 for (i = 0; i < gpio_bank_count; i++) {
1031 int j, gpio_count = 16;
1033 bank = &gpio_bank[i];
1034 bank->reserved_map = 0;
1035 bank->base = IO_ADDRESS(bank->base);
1036 spin_lock_init(&bank->lock);
1037 if (bank->method == METHOD_MPUIO) {
1038 omap_writew(0xFFFF, OMAP_MPUIO_BASE + OMAP_MPUIO_GPIO_MASKIT);
1040 #ifdef CONFIG_ARCH_OMAP15XX
1041 if (bank->method == METHOD_GPIO_1510) {
1042 __raw_writew(0xffff, bank->base + OMAP1510_GPIO_INT_MASK);
1043 __raw_writew(0x0000, bank->base + OMAP1510_GPIO_INT_STATUS);
1046 #if defined(CONFIG_ARCH_OMAP16XX)
1047 if (bank->method == METHOD_GPIO_1610) {
1048 __raw_writew(0x0000, bank->base + OMAP1610_GPIO_IRQENABLE1);
1049 __raw_writew(0xffff, bank->base + OMAP1610_GPIO_IRQSTATUS1);
1050 __raw_writew(0x0014, bank->base + OMAP1610_GPIO_SYSCONFIG);
1053 #ifdef CONFIG_ARCH_OMAP730
1054 if (bank->method == METHOD_GPIO_730) {
1055 __raw_writel(0xffffffff, bank->base + OMAP730_GPIO_INT_MASK);
1056 __raw_writel(0x00000000, bank->base + OMAP730_GPIO_INT_STATUS);
1058 gpio_count = 32; /* 730 has 32-bit GPIOs */
1061 #ifdef CONFIG_ARCH_OMAP24XX
1062 if (bank->method == METHOD_GPIO_24XX) {
1063 __raw_writel(0x00000000, bank->base + OMAP24XX_GPIO_IRQENABLE1);
1064 __raw_writel(0xffffffff, bank->base + OMAP24XX_GPIO_IRQSTATUS1);
1069 for (j = bank->virtual_irq_start;
1070 j < bank->virtual_irq_start + gpio_count; j++) {
1071 if (bank->method == METHOD_MPUIO)
1072 set_irq_chip(j, &mpuio_irq_chip);
1074 set_irq_chip(j, &gpio_irq_chip);
1075 set_irq_handler(j, do_simple_IRQ);
1076 set_irq_flags(j, IRQF_VALID);
1078 set_irq_chained_handler(bank->irq, gpio_irq_handler);
1079 set_irq_data(bank->irq, bank);
1082 /* Enable system clock for GPIO module.
1083 * The CAM_CLK_CTRL *is* really the right place. */
1084 if (cpu_is_omap16xx())
1085 omap_writel(omap_readl(ULPD_CAM_CLK_CTRL) | 0x04, ULPD_CAM_CLK_CTRL);
1090 #if defined (CONFIG_ARCH_OMAP16XX) || defined (CONFIG_ARCH_OMAP24XX)
1091 static int omap_gpio_suspend(struct sys_device *dev, pm_message_t mesg)
1095 if (!cpu_is_omap24xx() && !cpu_is_omap16xx())
1098 for (i = 0; i < gpio_bank_count; i++) {
1099 struct gpio_bank *bank = &gpio_bank[i];
1100 void __iomem *wake_status;
1101 void __iomem *wake_clear;
1102 void __iomem *wake_set;
1104 switch (bank->method) {
1105 case METHOD_GPIO_1610:
1106 wake_status = bank->base + OMAP1610_GPIO_WAKEUPENABLE;
1107 wake_clear = bank->base + OMAP1610_GPIO_CLEAR_WAKEUPENA;
1108 wake_set = bank->base + OMAP1610_GPIO_SET_WAKEUPENA;
1110 case METHOD_GPIO_24XX:
1111 wake_status = bank->base + OMAP24XX_GPIO_SETWKUENA;
1112 wake_clear = bank->base + OMAP24XX_GPIO_CLEARWKUENA;
1113 wake_set = bank->base + OMAP24XX_GPIO_SETWKUENA;
1119 spin_lock(&bank->lock);
1120 bank->saved_wakeup = __raw_readl(wake_status);
1121 __raw_writel(0xffffffff, wake_clear);
1122 __raw_writel(bank->suspend_wakeup, wake_set);
1123 spin_unlock(&bank->lock);
1129 static int omap_gpio_resume(struct sys_device *dev)
1133 if (!cpu_is_omap24xx() && !cpu_is_omap16xx())
1136 for (i = 0; i < gpio_bank_count; i++) {
1137 struct gpio_bank *bank = &gpio_bank[i];
1138 void __iomem *wake_clear;
1139 void __iomem *wake_set;
1141 switch (bank->method) {
1142 case METHOD_GPIO_1610:
1143 wake_clear = bank->base + OMAP1610_GPIO_CLEAR_WAKEUPENA;
1144 wake_set = bank->base + OMAP1610_GPIO_SET_WAKEUPENA;
1146 case METHOD_GPIO_24XX:
1147 wake_clear = bank->base + OMAP1610_GPIO_CLEAR_WAKEUPENA;
1148 wake_set = bank->base + OMAP1610_GPIO_SET_WAKEUPENA;
1154 spin_lock(&bank->lock);
1155 __raw_writel(0xffffffff, wake_clear);
1156 __raw_writel(bank->saved_wakeup, wake_set);
1157 spin_unlock(&bank->lock);
1163 static struct sysdev_class omap_gpio_sysclass = {
1164 set_kset_name("gpio"),
1165 .suspend = omap_gpio_suspend,
1166 .resume = omap_gpio_resume,
1169 static struct sys_device omap_gpio_device = {
1171 .cls = &omap_gpio_sysclass,
1176 * This may get called early from board specific init
1177 * for boards that have interrupts routed via FPGA.
1179 int omap_gpio_init(void)
1182 return _omap_gpio_init();
1187 static int __init omap_gpio_sysinit(void)
1192 ret = _omap_gpio_init();
1194 #if defined(CONFIG_ARCH_OMAP16XX) || defined(CONFIG_ARCH_OMAP24XX)
1195 if (cpu_is_omap16xx() || cpu_is_omap24xx()) {
1197 ret = sysdev_class_register(&omap_gpio_sysclass);
1199 ret = sysdev_register(&omap_gpio_device);
1207 EXPORT_SYMBOL(omap_request_gpio);
1208 EXPORT_SYMBOL(omap_free_gpio);
1209 EXPORT_SYMBOL(omap_set_gpio_direction);
1210 EXPORT_SYMBOL(omap_set_gpio_dataout);
1211 EXPORT_SYMBOL(omap_get_gpio_datain);
1213 arch_initcall(omap_gpio_sysinit);