diff options
Diffstat (limited to 'arch/arm/plat-omap/gpio.c')
| -rw-r--r-- | arch/arm/plat-omap/gpio.c | 623 |
1 files changed, 300 insertions, 323 deletions
diff --git a/arch/arm/plat-omap/gpio.c b/arch/arm/plat-omap/gpio.c index d17620c50c2..9b7e3545f32 100644 --- a/arch/arm/plat-omap/gpio.c +++ b/arch/arm/plat-omap/gpio.c @@ -27,6 +27,7 @@ #include <mach/irqs.h> #include <mach/gpio.h> #include <asm/mach/irq.h> +#include <plat/powerdomain.h> /* * OMAP1510 GPIO registers @@ -137,7 +138,11 @@ #define OMAP4_GPIO_IRQSTATUSCLR1 0x0040 #define OMAP4_GPIO_IRQWAKEN0 0x0044 #define OMAP4_GPIO_IRQWAKEN1 0x0048 -#define OMAP4_GPIO_SYSSTATUS 0x0104 +#define OMAP4_GPIO_SYSSTATUS 0x0114 +#define OMAP4_GPIO_IRQENABLE1 0x011c +#define OMAP4_GPIO_WAKE_EN 0x0120 +#define OMAP4_GPIO_IRQSTATUS2 0x0128 +#define OMAP4_GPIO_IRQENABLE2 0x012c #define OMAP4_GPIO_CTRL 0x0130 #define OMAP4_GPIO_OE 0x0134 #define OMAP4_GPIO_DATAIN 0x0138 @@ -148,6 +153,10 @@ #define OMAP4_GPIO_FALLINGDETECT 0x014c #define OMAP4_GPIO_DEBOUNCENABLE 0x0150 #define OMAP4_GPIO_DEBOUNCINGTIME 0x0154 +#define OMAP4_GPIO_CLEARIRQENABLE1 0x0160 +#define OMAP4_GPIO_SETIRQENABLE1 0x0164 +#define OMAP4_GPIO_CLEARWKUENA 0x0180 +#define OMAP4_GPIO_SETWKUENA 0x0184 #define OMAP4_GPIO_CLEARDATAOUT 0x0190 #define OMAP4_GPIO_SETDATAOUT 0x0194 /* @@ -177,13 +186,11 @@ struct gpio_bank { u16 irq; u16 virtual_irq_start; int method; -#if defined(CONFIG_ARCH_OMAP16XX) || defined(CONFIG_ARCH_OMAP24XX) || \ - defined(CONFIG_ARCH_OMAP34XX) || defined(CONFIG_ARCH_OMAP4) +#if defined(CONFIG_ARCH_OMAP16XX) || defined(CONFIG_ARCH_OMAP2PLUS) u32 suspend_wakeup; u32 saved_wakeup; #endif -#if defined(CONFIG_ARCH_OMAP24XX) || defined(CONFIG_ARCH_OMAP34XX) || \ - defined(CONFIG_ARCH_OMAP4) +#ifdef CONFIG_ARCH_OMAP2PLUS u32 non_wakeup_gpios; u32 enabled_non_wakeup_gpios; @@ -197,6 +204,7 @@ struct gpio_bank { struct gpio_chip chip; struct clk *dbck; u32 mod_usage; + u32 dbck_enable_mask; }; #define METHOD_MPUIO 0 @@ -204,6 +212,7 @@ struct gpio_bank { #define METHOD_GPIO_1610 2 #define METHOD_GPIO_7XX 3 #define METHOD_GPIO_24XX 5 +#define METHOD_GPIO_44XX 6 #ifdef CONFIG_ARCH_OMAP16XX static struct gpio_bank gpio_bank_1610[5] = { @@ -248,7 +257,7 @@ static struct gpio_bank gpio_bank_7xx[7] = { }; #endif -#ifdef CONFIG_ARCH_OMAP24XX +#ifdef CONFIG_ARCH_OMAP2 static struct gpio_bank gpio_bank_242x[4] = { { OMAP242X_GPIO1_BASE, NULL, INT_24XX_GPIO_BANK1, IH_GPIO_BASE, @@ -276,7 +285,7 @@ static struct gpio_bank gpio_bank_243x[5] = { #endif -#ifdef CONFIG_ARCH_OMAP34XX +#ifdef CONFIG_ARCH_OMAP3 static struct gpio_bank gpio_bank_34xx[6] = { { OMAP34XX_GPIO1_BASE, NULL, INT_34XX_GPIO_BANK1, IH_GPIO_BASE, METHOD_GPIO_24XX }, @@ -304,8 +313,6 @@ struct omap3_gpio_regs { u32 risingdetect; u32 fallingdetect; u32 dataout; - u32 setwkuena; - u32 setdataout; }; static struct omap3_gpio_regs gpio_context[OMAP34XX_NR_GPIOS]; @@ -313,18 +320,18 @@ static struct omap3_gpio_regs gpio_context[OMAP34XX_NR_GPIOS]; #ifdef CONFIG_ARCH_OMAP4 static struct gpio_bank gpio_bank_44xx[6] = { - { OMAP44XX_GPIO1_BASE, NULL, INT_44XX_GPIO_BANK1, IH_GPIO_BASE, - METHOD_GPIO_24XX }, - { OMAP44XX_GPIO2_BASE, NULL, INT_44XX_GPIO_BANK2, IH_GPIO_BASE + 32, - METHOD_GPIO_24XX }, - { OMAP44XX_GPIO3_BASE, NULL, INT_44XX_GPIO_BANK3, IH_GPIO_BASE + 64, - METHOD_GPIO_24XX }, - { OMAP44XX_GPIO4_BASE, NULL, INT_44XX_GPIO_BANK4, IH_GPIO_BASE + 96, - METHOD_GPIO_24XX }, - { OMAP44XX_GPIO5_BASE, NULL, INT_44XX_GPIO_BANK5, IH_GPIO_BASE + 128, - METHOD_GPIO_24XX }, - { OMAP44XX_GPIO6_BASE, NULL, INT_44XX_GPIO_BANK6, IH_GPIO_BASE + 160, - METHOD_GPIO_24XX }, + { OMAP44XX_GPIO1_BASE, NULL, OMAP44XX_IRQ_GPIO1, IH_GPIO_BASE, + METHOD_GPIO_44XX }, + { OMAP44XX_GPIO2_BASE, NULL, OMAP44XX_IRQ_GPIO2, IH_GPIO_BASE + 32, + METHOD_GPIO_44XX }, + { OMAP44XX_GPIO3_BASE, NULL, OMAP44XX_IRQ_GPIO3, IH_GPIO_BASE + 64, + METHOD_GPIO_44XX }, + { OMAP44XX_GPIO4_BASE, NULL, OMAP44XX_IRQ_GPIO4, IH_GPIO_BASE + 96, + METHOD_GPIO_44XX }, + { OMAP44XX_GPIO5_BASE, NULL, OMAP44XX_IRQ_GPIO5, IH_GPIO_BASE + 128, + METHOD_GPIO_44XX }, + { OMAP44XX_GPIO6_BASE, NULL, OMAP44XX_IRQ_GPIO6, IH_GPIO_BASE + 160, + METHOD_GPIO_44XX }, }; #endif @@ -426,13 +433,13 @@ static void _set_gpio_direction(struct gpio_bank *bank, int gpio, int is_input) reg += OMAP7XX_GPIO_DIR_CONTROL; break; #endif -#if defined(CONFIG_ARCH_OMAP24XX) || defined(CONFIG_ARCH_OMAP34XX) +#if defined(CONFIG_ARCH_OMAP2) || defined(CONFIG_ARCH_OMAP3) case METHOD_GPIO_24XX: reg += OMAP24XX_GPIO_OE; break; #endif #if defined(CONFIG_ARCH_OMAP4) - case METHOD_GPIO_24XX: + case METHOD_GPIO_44XX: reg += OMAP4_GPIO_OE; break; #endif @@ -493,7 +500,7 @@ static void _set_gpio_dataout(struct gpio_bank *bank, int gpio, int enable) l &= ~(1 << gpio); break; #endif -#if defined(CONFIG_ARCH_OMAP24XX) || defined(CONFIG_ARCH_OMAP34XX) +#if defined(CONFIG_ARCH_OMAP2) || defined(CONFIG_ARCH_OMAP3) case METHOD_GPIO_24XX: if (enable) reg += OMAP24XX_GPIO_SETDATAOUT; @@ -503,7 +510,7 @@ static void _set_gpio_dataout(struct gpio_bank *bank, int gpio, int enable) break; #endif #ifdef CONFIG_ARCH_OMAP4 - case METHOD_GPIO_24XX: + case METHOD_GPIO_44XX: if (enable) reg += OMAP4_GPIO_SETDATAOUT; else @@ -546,13 +553,13 @@ static int _get_gpio_datain(struct gpio_bank *bank, int gpio) reg += OMAP7XX_GPIO_DATA_INPUT; break; #endif -#if defined(CONFIG_ARCH_OMAP24XX) || defined(CONFIG_ARCH_OMAP34XX) +#if defined(CONFIG_ARCH_OMAP2) || defined(CONFIG_ARCH_OMAP3) case METHOD_GPIO_24XX: reg += OMAP24XX_GPIO_DATAIN; break; #endif #ifdef CONFIG_ARCH_OMAP4 - case METHOD_GPIO_24XX: + case METHOD_GPIO_44XX: reg += OMAP4_GPIO_DATAIN; break; #endif @@ -592,12 +599,16 @@ static int _get_gpio_dataout(struct gpio_bank *bank, int gpio) reg += OMAP7XX_GPIO_DATA_OUTPUT; break; #endif -#if defined(CONFIG_ARCH_OMAP24XX) || defined(CONFIG_ARCH_OMAP34XX) || \ - defined(CONFIG_ARCH_OMAP4) +#if defined(CONFIG_ARCH_OMAP2) || defined(CONFIG_ARCH_OMAP3) case METHOD_GPIO_24XX: reg += OMAP24XX_GPIO_DATAOUT; break; #endif +#ifdef CONFIG_ARCH_OMAP4 + case METHOD_GPIO_44XX: + reg += OMAP4_GPIO_DATAOUT; + break; +#endif default: return -EINVAL; } @@ -613,79 +624,61 @@ do { \ __raw_writel(l, base + reg); \ } while(0) -void omap_set_gpio_debounce(int gpio, int enable) +/** + * _set_gpio_debounce - low level gpio debounce time + * @bank: the gpio bank we're acting upon + * @gpio: the gpio number on this @gpio + * @debounce: debounce time to use + * + * OMAP's debounce time is in 31us steps so we need + * to convert and round up to the closest unit. + */ +static void _set_gpio_debounce(struct gpio_bank *bank, unsigned gpio, + unsigned debounce) { - struct gpio_bank *bank; - void __iomem *reg; - unsigned long flags; - u32 val, l = 1 << get_gpio_index(gpio); + void __iomem *reg = bank->base; + u32 val; + u32 l; + + if (debounce < 32) + debounce = 0x01; + else if (debounce > 7936) + debounce = 0xff; + else + debounce = (debounce / 0x1f) - 1; - if (cpu_class_is_omap1()) - return; + l = 1 << get_gpio_index(gpio); + + if (cpu_is_omap44xx()) + reg += OMAP4_GPIO_DEBOUNCINGTIME; + else + reg += OMAP24XX_GPIO_DEBOUNCE_VAL; + + __raw_writel(debounce, reg); - bank = get_gpio_bank(gpio); reg = bank->base; -#ifdef CONFIG_ARCH_OMAP4 - reg += OMAP4_GPIO_DEBOUNCENABLE; -#else - reg += OMAP24XX_GPIO_DEBOUNCE_EN; -#endif - if (!(bank->mod_usage & l)) { - printk(KERN_ERR "GPIO %d not requested\n", gpio); - return; - } + if (cpu_is_omap44xx()) + reg += OMAP4_GPIO_DEBOUNCENABLE; + else + reg += OMAP24XX_GPIO_DEBOUNCE_EN; - spin_lock_irqsave(&bank->lock, flags); val = __raw_readl(reg); - if (enable && !(val & l)) + if (debounce) { val |= l; - else if (!enable && (val & l)) - val &= ~l; - else - goto done; - - if (cpu_is_omap34xx() || cpu_is_omap44xx()) { - if (enable) + if (cpu_is_omap34xx() || cpu_is_omap44xx()) clk_enable(bank->dbck); - else + } else { + val &= ~l; + if (cpu_is_omap34xx() || cpu_is_omap44xx()) clk_disable(bank->dbck); } + bank->dbck_enable_mask = val; __raw_writel(val, reg); -done: - spin_unlock_irqrestore(&bank->lock, flags); } -EXPORT_SYMBOL(omap_set_gpio_debounce); - -void omap_set_gpio_debounce_time(int gpio, int enc_time) -{ - struct gpio_bank *bank; - void __iomem *reg; - - if (cpu_class_is_omap1()) - return; - - bank = get_gpio_bank(gpio); - reg = bank->base; - if (!bank->mod_usage) { - printk(KERN_ERR "GPIO not requested\n"); - return; - } - - enc_time &= 0xff; -#ifdef CONFIG_ARCH_OMAP4 - reg += OMAP4_GPIO_DEBOUNCINGTIME; -#else - reg += OMAP24XX_GPIO_DEBOUNCE_VAL; -#endif - __raw_writel(enc_time, reg); -} -EXPORT_SYMBOL(omap_set_gpio_debounce_time); - -#if defined(CONFIG_ARCH_OMAP24XX) || defined(CONFIG_ARCH_OMAP34XX) || \ - defined(CONFIG_ARCH_OMAP4) +#ifdef CONFIG_ARCH_OMAP2PLUS static inline void set_24xx_gpio_triggering(struct gpio_bank *bank, int gpio, int trigger) { @@ -724,15 +717,27 @@ static inline void set_24xx_gpio_triggering(struct gpio_bank *bank, int gpio, OMAP4_GPIO_IRQWAKEN0); } } else { - if (trigger != 0) + /* + * GPIO wakeup request can only be generated on edge + * transitions + */ + if (trigger & IRQ_TYPE_EDGE_BOTH) __raw_writel(1 << gpio, bank->base + OMAP24XX_GPIO_SETWKUENA); else __raw_writel(1 << gpio, bank->base + OMAP24XX_GPIO_CLEARWKUENA); } - } else { - if (trigger != 0) + } + /* This part needs to be executed always for OMAP34xx */ + if (cpu_is_omap34xx() || (bank->non_wakeup_gpios & gpio_bit)) { + /* + * Log the edge gpio and manually trigger the IRQ + * after resume if the input level changes + * to avoid irq lost during PER RET/OFF mode + * Applies for omap2 non-wakeup gpio and all omap3 gpios + */ + if (trigger & IRQ_TYPE_EDGE_BOTH) bank->enabled_non_wakeup_gpios |= gpio_bit; else bank->enabled_non_wakeup_gpios &= ~gpio_bit; @@ -750,6 +755,7 @@ static inline void set_24xx_gpio_triggering(struct gpio_bank *bank, int gpio, } #endif +#ifdef CONFIG_ARCH_OMAP1 /* * This only applies to chips that can't do both rising and falling edge * detection at once. For all other chips, this function is a noop. @@ -760,11 +766,9 @@ static void _toggle_gpio_edge_triggering(struct gpio_bank *bank, int gpio) u32 l = 0; switch (bank->method) { -#ifdef CONFIG_ARCH_OMAP1 case METHOD_MPUIO: reg += OMAP_MPUIO_GPIO_INT_EDGE; break; -#endif #ifdef CONFIG_ARCH_OMAP15XX case METHOD_GPIO_1510: reg += OMAP1510_GPIO_INT_CONTROL; @@ -787,6 +791,7 @@ static void _toggle_gpio_edge_triggering(struct gpio_bank *bank, int gpio) __raw_writel(l, reg); } +#endif static int _set_gpio_triggering(struct gpio_bank *bank, int gpio, int trigger) { @@ -798,7 +803,7 @@ static int _set_gpio_triggering(struct gpio_bank *bank, int gpio, int trigger) case METHOD_MPUIO: reg += OMAP_MPUIO_GPIO_INT_EDGE; l = __raw_readl(reg); - if (trigger & IRQ_TYPE_EDGE_BOTH) + if ((trigger & IRQ_TYPE_SENSE_MASK) == IRQ_TYPE_EDGE_BOTH) bank->toggle_mask |= 1 << gpio; if (trigger & IRQ_TYPE_EDGE_RISING) l |= 1 << gpio; @@ -812,7 +817,7 @@ static int _set_gpio_triggering(struct gpio_bank *bank, int gpio, int trigger) case METHOD_GPIO_1510: reg += OMAP1510_GPIO_INT_CONTROL; l = __raw_readl(reg); - if (trigger & IRQ_TYPE_EDGE_BOTH) + if ((trigger & IRQ_TYPE_SENSE_MASK) == IRQ_TYPE_EDGE_BOTH) bank->toggle_mask |= 1 << gpio; if (trigger & IRQ_TYPE_EDGE_RISING) l |= 1 << gpio; @@ -846,7 +851,7 @@ static int _set_gpio_triggering(struct gpio_bank *bank, int gpio, int trigger) case METHOD_GPIO_7XX: reg += OMAP7XX_GPIO_INT_CONTROL; l = __raw_readl(reg); - if (trigger & IRQ_TYPE_EDGE_BOTH) + if ((trigger & IRQ_TYPE_SENSE_MASK) == IRQ_TYPE_EDGE_BOTH) bank->toggle_mask |= 1 << gpio; if (trigger & IRQ_TYPE_EDGE_RISING) l |= 1 << gpio; @@ -856,9 +861,9 @@ static int _set_gpio_triggering(struct gpio_bank *bank, int gpio, int trigger) goto bad; break; #endif -#if defined(CONFIG_ARCH_OMAP24XX) || defined(CONFIG_ARCH_OMAP34XX) || \ - defined(CONFIG_ARCH_OMAP4) +#ifdef CONFIG_ARCH_OMAP2PLUS case METHOD_GPIO_24XX: + case METHOD_GPIO_44XX: set_24xx_gpio_triggering(bank, gpio, trigger); break; #endif @@ -937,13 +942,13 @@ static void _clear_gpio_irqbank(struct gpio_bank *bank, int gpio_mask) reg += OMAP7XX_GPIO_INT_STATUS; break; #endif -#if defined(CONFIG_ARCH_OMAP24XX) || defined(CONFIG_ARCH_OMAP34XX) +#if defined(CONFIG_ARCH_OMAP2) || defined(CONFIG_ARCH_OMAP3) case METHOD_GPIO_24XX: reg += OMAP24XX_GPIO_IRQSTATUS1; break; #endif #if defined(CONFIG_ARCH_OMAP4) - case METHOD_GPIO_24XX: + case METHOD_GPIO_44XX: reg += OMAP4_GPIO_IRQSTATUS0; break; #endif @@ -954,12 +959,11 @@ static void _clear_gpio_irqbank(struct gpio_bank *bank, int gpio_mask) __raw_writel(gpio_mask, reg); /* Workaround for clearing DSP GPIO interrupts to allow retention */ -#if defined(CONFIG_ARCH_OMAP24XX) || defined(CONFIG_ARCH_OMAP34XX) - reg = bank->base + OMAP24XX_GPIO_IRQSTATUS2; -#endif -#if defined(CONFIG_ARCH_OMAP4) - reg = bank->base + OMAP4_GPIO_IRQSTATUS1; -#endif + if (cpu_is_omap24xx() || cpu_is_omap34xx()) + reg = bank->base + OMAP24XX_GPIO_IRQSTATUS2; + else if (cpu_is_omap44xx()) + reg = bank->base + OMAP4_GPIO_IRQSTATUS1; + if (cpu_is_omap24xx() || cpu_is_omap34xx() || cpu_is_omap44xx()) { __raw_writel(gpio_mask, reg); @@ -1008,14 +1012,14 @@ static u32 _get_gpio_irqbank_mask(struct gpio_bank *bank) inv = 1; break; #endif -#if defined(CONFIG_ARCH_OMAP24XX) || defined(CONFIG_ARCH_OMAP34XX) +#if defined(CONFIG_ARCH_OMAP2) || defined(CONFIG_ARCH_OMAP3) case METHOD_GPIO_24XX: reg += OMAP24XX_GPIO_IRQENABLE1; mask = 0xffffffff; break; #endif #if defined(CONFIG_ARCH_OMAP4) - case METHOD_GPIO_24XX: + case METHOD_GPIO_44XX: reg += OMAP4_GPIO_IRQSTATUSSET0; mask = 0xffffffff; break; @@ -1077,7 +1081,7 @@ static void _enable_gpio_irqbank(struct gpio_bank *bank, int gpio_mask, int enab l |= gpio_mask; break; #endif -#if defined(CONFIG_ARCH_OMAP24XX) || defined(CONFIG_ARCH_OMAP34XX) +#if defined(CONFIG_ARCH_OMAP2) || defined(CONFIG_ARCH_OMAP3) case METHOD_GPIO_24XX: if (enable) reg += OMAP24XX_GPIO_SETIRQENABLE1; @@ -1087,7 +1091,7 @@ static void _enable_gpio_irqbank(struct gpio_bank *bank, int gpio_mask, int enab break; #endif #ifdef CONFIG_ARCH_OMAP4 - case METHOD_GPIO_24XX: + case METHOD_GPIO_44XX: if (enable) reg += OMAP4_GPIO_IRQSTATUSSET0; else @@ -1131,9 +1135,9 @@ static int _set_gpio_wakeup(struct gpio_bank *bank, int gpio, int enable) spin_unlock_irqrestore(&bank->lock, flags); return 0; #endif -#if defined(CONFIG_ARCH_OMAP24XX) || defined(CONFIG_ARCH_OMAP34XX) || \ - defined(CONFIG_ARCH_OMAP4) +#ifdef CONFIG_ARCH_OMAP2PLUS case METHOD_GPIO_24XX: + case METHOD_GPIO_44XX: if (bank->non_wakeup_gpios & (1 << gpio)) { printk(KERN_ERR "Unable to modify wakeup on " "non-wakeup GPIO%d\n", @@ -1201,11 +1205,17 @@ static int omap_gpio_request(struct gpio_chip *chip, unsigned offset) #endif if (!cpu_class_is_omap1()) { if (!bank->mod_usage) { + void __iomem *reg = bank->base; u32 ctrl; - ctrl = __raw_readl(bank->base + OMAP24XX_GPIO_CTRL); - ctrl &= 0xFFFFFFFE; + + if (cpu_is_omap24xx() || cpu_is_omap34xx()) + reg += OMAP24XX_GPIO_CTRL; + else if (cpu_is_omap44xx()) + reg += OMAP4_GPIO_CTRL; + ctrl = __raw_readl(reg); /* Module is enabled, clocks are not gated */ - __raw_writel(ctrl, bank->base + OMAP24XX_GPIO_CTRL); + ctrl &= 0xFFFFFFFE; + __raw_writel(ctrl, reg); } bank->mod_usage |= 1 << offset; } @@ -1227,22 +1237,34 @@ static void omap_gpio_free(struct gpio_chip *chip, unsigned offset) __raw_writel(1 << offset, reg); } #endif -#if defined(CONFIG_ARCH_OMAP24XX) || defined(CONFIG_ARCH_OMAP34XX) || \ - defined(CONFIG_ARCH_OMAP4) +#if defined(CONFIG_ARCH_OMAP2) || defined(CONFIG_ARCH_OMAP3) if (bank->method == METHOD_GPIO_24XX) { /* Disable wake-up during idle for dynamic tick */ void __iomem *reg = bank->base + OMAP24XX_GPIO_CLEARWKUENA; __raw_writel(1 << offset, reg); } #endif +#ifdef CONFIG_ARCH_OMAP4 + if (bank->method == METHOD_GPIO_44XX) { + /* Disable wake-up during idle for dynamic tick */ + void __iomem *reg = bank->base + OMAP4_GPIO_IRQWAKEN0; + __raw_writel(1 << offset, reg); + } +#endif if (!cpu_class_is_omap1()) { bank->mod_usage &= ~(1 << offset); if (!bank->mod_usage) { + void __iomem *reg = bank->base; u32 ctrl; - ctrl = __raw_readl(bank->base + OMAP24XX_GPIO_CTRL); + + if (cpu_is_omap24xx() || cpu_is_omap34xx()) + reg += OMAP24XX_GPIO_CTRL; + else if (cpu_is_omap44xx()) + reg += OMAP4_GPIO_CTRL; + ctrl = __raw_readl(reg); /* Module is disabled, clocks are gated */ ctrl |= 1; - __raw_writel(ctrl, bank->base + OMAP24XX_GPIO_CTRL); + __raw_writel(ctrl, reg); } } _reset_gpio(bank, bank->chip.base + offset); @@ -1286,12 +1308,12 @@ static void gpio_irq_handler(unsigned int irq, struct irq_desc *desc) if (bank->method == METHOD_GPIO_7XX) isr_reg = bank->base + OMAP7XX_GPIO_INT_STATUS; #endif -#if defined(CONFIG_ARCH_OMAP24XX) || defined(CONFIG_ARCH_OMAP34XX) +#if defined(CONFIG_ARCH_OMAP2) || defined(CONFIG_ARCH_OMAP3) if (bank->method == METHOD_GPIO_24XX) isr_reg = bank->base + OMAP24XX_GPIO_IRQSTATUS1; #endif #if defined(CONFIG_ARCH_OMAP4) - if (bank->method == METHOD_GPIO_24XX) + if (bank->method == METHOD_GPIO_44XX) isr_reg = bank->base + OMAP4_GPIO_IRQSTATUS0; #endif while(1) { @@ -1573,6 +1595,12 @@ static int gpio_is_input(struct gpio_bank *bank, int mask) case METHOD_GPIO_24XX: reg += OMAP24XX_GPIO_OE; break; + case METHOD_GPIO_44XX: + reg += OMAP4_GPIO_OE; + break; + default: + WARN_ONCE(1, "gpio_is_input: incorrect OMAP GPIO method"); + return -EINVAL; } return __raw_readl(reg) & mask; } @@ -1608,6 +1636,20 @@ static int gpio_output(struct gpio_chip *chip, unsigned offset, int value) return 0; } +static int gpio_debounce(struct gpio_chip *chip, unsigned offset, + unsigned debounce) +{ + struct gpio_bank *bank; + unsigned long flags; + + bank = container_of(chip, struct gpio_bank, chip); + spin_lock_irqsave(&bank->lock, flags); + _set_gpio_debounce(bank, offset, debounce); + spin_unlock_irqrestore(&bank->lock, flags); + + return 0; +} + static void gpio_set(struct gpio_chip *chip, unsigned offset, int value) { struct gpio_bank *bank; @@ -1630,7 +1672,7 @@ static int gpio_2irq(struct gpio_chip *chip, unsigned offset) /*---------------------------------------------------------------------*/ static int initialized; -#if !(defined(CONFIG_ARCH_OMAP3) || defined(CONFIG_ARCH_OMAP4)) +#if defined(CONFIG_ARCH_OMAP1) || defined(CONFIG_ARCH_OMAP2) static struct clk * gpio_ick; #endif @@ -1756,7 +1798,7 @@ static int __init _omap_gpio_init(void) bank_size = SZ_2K; } #endif -#ifdef CONFIG_ARCH_OMAP24XX +#ifdef CONFIG_ARCH_OMAP2 if (cpu_is_omap242x()) { gpio_bank_count = 4; gpio_bank = gpio_bank_242x; @@ -1766,7 +1808,7 @@ static int __init _omap_gpio_init(void) gpio_bank = gpio_bank_243x; } #endif -#ifdef CONFIG_ARCH_OMAP34XX +#ifdef CONFIG_ARCH_OMAP3 if (cpu_is_omap34xx()) { gpio_bank_count = OMAP34XX_NR_GPIOS; gpio_bank = gpio_bank_34xx; @@ -1809,31 +1851,44 @@ static int __init _omap_gpio_init(void) gpio_count = 32; /* 7xx has 32-bit GPIOs */ } -#if defined(CONFIG_ARCH_OMAP24XX) || defined(CONFIG_ARCH_OMAP34XX) || \ - defined(CONFIG_ARCH_OMAP4) - if (bank->method == METHOD_GPIO_24XX) { +#ifdef CONFIG_ARCH_OMAP2PLUS + if ((bank->method == METHOD_GPIO_24XX) || + (bank->method == METHOD_GPIO_44XX)) { static const u32 non_wakeup_gpios[] = { 0xe203ffc0, 0x08700040 }; - if (cpu_is_omap44xx()) { - __raw_writel(0xffffffff, bank->base + + + if (cpu_is_omap44xx()) { + __raw_writel(0xffffffff, bank->base + OMAP4_GPIO_IRQSTATUSCLR0); - __raw_writew(0x0015, bank->base + + __raw_writew(0x0015, bank->base + OMAP4_GPIO_SYSCONFIG); - __raw_writel(0x00000000, bank->base + + __raw_writel(0x00000000, bank->base + OMAP4_GPIO_DEBOUNCENABLE); - /* Initialize interface clock ungated, module enabled */ - __raw_writel(0, bank->base + OMAP4_GPIO_CTRL); - } else { - __raw_writel(0x00000000, bank->base + OMAP24XX_GPIO_IRQENABLE1); - __raw_writel(0xffffffff, bank->base + OMAP24XX_GPIO_IRQSTATUS1); - __raw_writew(0x0015, bank->base + OMAP24XX_GPIO_SYSCONFIG); - __raw_writel(0x00000000, bank->base + OMAP24XX_GPIO_DEBOUNCE_EN); - - /* Initialize interface clock ungated, module enabled */ - __raw_writel(0, bank->base + OMAP24XX_GPIO_CTRL); - } - if (i < ARRAY_SIZE(non_wakeup_gpios)) + /* + * Initialize interface clock ungated, + * module enabled + */ + __raw_writel(0, bank->base + OMAP4_GPIO_CTRL); + } else { + __raw_writel(0x00000000, bank->base + + OMAP24XX_GPIO_IRQENABLE1); + __raw_writel(0xffffffff, bank->base + + OMAP24XX_GPIO_IRQSTATUS1); + __raw_writew(0x0015, bank->base + + OMAP24XX_GPIO_SYSCONFIG); + __raw_writel(0x00000000, bank->base + + OMAP24XX_GPIO_DEBOUNCE_EN); + + /* + * Initialize interface clock ungated, + * module enabled + */ + __raw_writel(0, bank->base + + OMAP24XX_GPIO_CTRL); + } + if (cpu_is_omap24xx() && + i < ARRAY_SIZE(non_wakeup_gpios)) bank->non_wakeup_gpios = non_wakeup_gpios[i]; gpio_count = 32; } @@ -1848,6 +1903,7 @@ static int __init _omap_gpio_init(void) bank->chip.direction_input = gpio_input; bank->chip.get = gpio_get; bank->chip.direction_output = gpio_output; + bank->chip.set_debounce = gpio_debounce; bank->chip.set = gpio_set; bank->chip.to_irq = gpio_2irq; if (bank_is_mpuio(bank)) { @@ -1903,8 +1959,7 @@ static int __init _omap_gpio_init(void) return 0; } -#if defined(CONFIG_ARCH_OMAP16XX) || defined(CONFIG_ARCH_OMAP24XX) || \ - defined(CONFIG_ARCH_OMAP34XX) || defined(CONFIG_ARCH_OMAP4) +#if defined(CONFIG_ARCH_OMAP16XX) || defined(CONFIG_ARCH_OMAP2PLUS) static int omap_gpio_suspend(struct sys_device *dev, pm_message_t mesg) { int i; @@ -1927,7 +1982,7 @@ static int omap_gpio_suspend(struct sys_device *dev, pm_message_t mesg) wake_set = bank->base + OMAP1610_GPIO_SET_WAKEUPENA; break; #endif -#if defined(CONFIG_ARCH_OMAP24XX) || defined(CONFIG_ARCH_OMAP34XX) +#if defined(CONFIG_ARCH_OMAP2) || defined(CONFIG_ARCH_OMAP3) case METHOD_GPIO_24XX: wake_status = bank->base + OMAP24XX_GPIO_WAKE_EN; wake_clear = bank->base + OMAP24XX_GPIO_CLEARWKUENA; @@ -1935,7 +1990,7 @@ static int omap_gpio_suspend(struct sys_device *dev, pm_message_t mesg) break; #endif #ifdef CONFIG_ARCH_OMAP4 - case METHOD_GPIO_24XX: + case METHOD_GPIO_44XX: wake_status = bank->base + OMAP4_GPIO_IRQWAKEN0; wake_clear = bank->base + OMAP4_GPIO_IRQWAKEN0; wake_set = bank->base + OMAP4_GPIO_IRQWAKEN0; @@ -1975,14 +2030,14 @@ static int omap_gpio_resume(struct sys_device *dev) wake_set = bank->base + OMAP1610_GPIO_SET_WAKEUPENA; break; #endif -#if defined(CONFIG_ARCH_OMAP24XX) || defined(CONFIG_ARCH_OMAP34XX) +#if defined(CONFIG_ARCH_OMAP2) || defined(CONFIG_ARCH_OMAP3) case METHOD_GPIO_24XX: wake_clear = bank->base + OMAP24XX_GPIO_CLEARWKUENA; wake_set = bank->base + OMAP24XX_GPIO_SETWKUENA; break; #endif #ifdef CONFIG_ARCH_OMAP4 - case METHOD_GPIO_24XX: + case METHOD_GPIO_44XX: wake_clear = bank->base + OMAP4_GPIO_IRQWAKEN0; wake_set = bank->base + OMAP4_GPIO_IRQWAKEN0; break; @@ -2013,46 +2068,69 @@ static struct sys_device omap_gpio_device = { #endif -#if defined(CONFIG_ARCH_OMAP24XX) || defined(CONFIG_ARCH_OMAP34XX) || \ - defined(CONFIG_ARCH_OMAP4) +#ifdef CONFIG_ARCH_OMAP2PLUS static int workaround_enabled; -void omap2_gpio_prepare_for_retention(void) +void omap2_gpio_prepare_for_idle(int power_state) { int i, c = 0; + int min = 0; - /* Remove triggering for all non-wakeup GPIOs. Otherwise spurious - * IRQs will be generated. See OMAP2420 Errata item 1.101. */ - for (i = 0; i < gpio_bank_count; i++) { + if (cpu_is_omap34xx()) + min = 1; + + for (i = min; i < gpio_bank_count; i++) { struct gpio_bank *bank = &gpio_bank[i]; u32 l1, l2; + if (bank->dbck_enable_mask) + clk_disable(bank->dbck); + + if (power_state > PWRDM_POWER_OFF) + continue; + + /* If going to OFF, remove triggering for all + * non-wakeup GPIOs. Otherwise spurious IRQs will be + * generated. See OMAP2420 Errata item 1.101. */ if (!(bank->enabled_non_wakeup_gpios)) continue; -#if defined(CONFIG_ARCH_OMAP24XX) || defined(CONFIG_ARCH_OMAP34XX) - bank->saved_datain = __raw_readl(bank->base + OMAP24XX_GPIO_DATAIN); - l1 = __raw_readl(bank->base + OMAP24XX_GPIO_FALLINGDETECT); - l2 = __raw_readl(bank->base + OMAP24XX_GPIO_RISINGDETECT); -#endif -#ifdef CONFIG_ARCH_OMAP4 - bank->saved_datain = __raw_readl(bank->base + - OMAP4_GPIO_DATAIN); - l1 = __raw_readl(bank->base + OMAP4_GPIO_FALLINGDETECT); - l2 = __raw_readl(bank->base + OMAP4_GPIO_RISINGDETECT); -#endif + + if (cpu_is_omap24xx() || cpu_is_omap34xx()) { + bank->saved_datain = __raw_readl(bank->base + + OMAP24XX_GPIO_DATAIN); + l1 = __raw_readl(bank->base + + OMAP24XX_GPIO_FALLINGDETECT); + l2 = __raw_readl(bank->base + + OMAP24XX_GPIO_RISINGDETECT); + } + + if (cpu_is_omap44xx()) { + bank->saved_datain = __raw_readl(bank->base + + OMAP4_GPIO_DATAIN); + l1 = __raw_readl(bank->base + + OMAP4_GPIO_FALLINGDETECT); + l2 = __raw_readl(bank->base + + OMAP4_GPIO_RISINGDETECT); + } + bank->saved_fallingdetect = l1; bank->saved_risingdetect = l2; l1 &= ~bank->enabled_non_wakeup_gpios; l2 &= ~bank->enabled_non_wakeup_gpios; -#if defined(CONFIG_ARCH_OMAP24XX) || defined(CONFIG_ARCH_OMAP34XX) - __raw_writel(l1, bank->base + OMAP24XX_GPIO_FALLINGDETECT); - __raw_writel(l2, bank->base + OMAP24XX_GPIO_RISINGDETECT); -#endif -#ifdef CONFIG_ARCH_OMAP4 - __raw_writel(l1, bank->base + OMAP4_GPIO_FALLINGDETECT); - __raw_writel(l2, bank->base + OMAP4_GPIO_RISINGDETECT); -#endif + + if (cpu_is_omap24xx() || cpu_is_omap34xx()) { + __raw_writel(l1, bank->base + + OMAP24XX_GPIO_FALLINGDETECT); + __raw_writel(l2, bank->base + + OMAP24XX_GPIO_RISINGDETECT); + } + + if (cpu_is_omap44xx()) { + __raw_writel(l1, bank->base + OMAP4_GPIO_FALLINGDETECT); + __raw_writel(l2, bank->base + OMAP4_GPIO_RISINGDETECT); + } + c++; } if (!c) { @@ -2062,38 +2140,48 @@ void omap2_gpio_prepare_for_retention(void) workaround_enabled = 1; } -void omap2_gpio_resume_after_retention(void) +void omap2_gpio_resume_after_idle(void) { int i; + int min = 0; - if (!workaround_enabled) - return; - for (i = 0; i < gpio_bank_count; i++) { + if (cpu_is_omap34xx()) + min = 1; + for (i = min; i < gpio_bank_count; i++) { struct gpio_bank *bank = &gpio_bank[i]; u32 l, gen, gen0, gen1; + if (bank->dbck_enable_mask) + clk_enable(bank->dbck); + + if (!workaround_enabled) + continue; + if (!(bank->enabled_non_wakeup_gpios)) continue; -#if defined(CONFIG_ARCH_OMAP24XX) || defined(CONFIG_ARCH_OMAP34XX) - __raw_writel(bank->saved_fallingdetect, + + if (cpu_is_omap24xx() || cpu_is_omap34xx()) { + __raw_writel(bank->saved_fallingdetect, bank->base + OMAP24XX_GPIO_FALLINGDETECT); - __raw_writel(bank->saved_risingdetect, + __raw_writel(bank->saved_risingdetect, bank->base + OMAP24XX_GPIO_RISINGDETECT); - l = __raw_readl(bank->base + OMAP24XX_GPIO_DATAIN); -#endif -#ifdef CONFIG_ARCH_OMAP4 - __raw_writel(bank->saved_fallingdetect, + l = __raw_readl(bank->base + OMAP24XX_GPIO_DATAIN); + } + + if (cpu_is_omap44xx()) { + __raw_writel(bank->saved_fallingdetect, bank->base + OMAP4_GPIO_FALLINGDETECT); - __raw_writel(bank->saved_risingdetect, + __raw_writel(bank->saved_risingdetect, bank->base + OMAP4_GPIO_RISINGDETECT); - l = __raw_readl(bank->base + OMAP4_GPIO_DATAIN); -#endif + l = __raw_readl(bank->base + OMAP4_GPIO_DATAIN); + } + /* Check if any of the non-wakeup interrupt GPIOs have changed * state. If so, generate an IRQ by software. This is * horribly racy, but it's the best we can do to work around * this silicon bug. */ l ^= bank->saved_datain; - l &= bank->non_wakeup_gpios; + l &= bank->enabled_non_wakeup_gpios; /* * No need to generate IRQs for the rising edge for gpio IRQs @@ -2113,30 +2201,36 @@ void omap2_gpio_resume_after_retention(void) if (gen) { u32 old0, old1; -#if defined(CONFIG_ARCH_OMAP24XX) || defined(CONFIG_ARCH_OMAP34XX) - old0 = __raw_readl(bank->base + OMAP24XX_GPIO_LEVELDETECT0); - old1 = __raw_readl(bank->base + OMAP24XX_GPIO_LEVELDETECT1); - __raw_writel(old0 | gen, bank->base + + + if (cpu_is_omap24xx() || cpu_is_omap34xx()) { + old0 = __raw_readl(bank->base + OMAP24XX_GPIO_LEVELDETECT0); - __raw_writel(old1 | gen, bank->base + + old1 = __raw_readl(bank->base + OMAP24XX_GPIO_LEVELDETECT1); - __raw_writel(old0, bank->base + OMAP24XX_GPIO_LEVELDETECT0); - __raw_writel(old1, bank->base + OMAP24XX_GPIO_LEVELDETECT1); -#endif -#ifdef CONFIG_ARCH_OMAP4 - old0 = __raw_readl(bank->base + + __raw_writel(old0 | gen, bank->base + + OMAP24XX_GPIO_LEVELDETECT0); + __raw_writel(old1 | gen, bank->base + + OMAP24XX_GPIO_LEVELDETECT1); + __raw_writel(old0, bank->base + + OMAP24XX_GPIO_LEVELDETECT0); + __raw_writel(old1, bank->base + + OMAP24XX_GPIO_LEVELDETECT1); + } + + if (cpu_is_omap44xx()) { + old0 = __raw_readl(bank->base + OMAP4_GPIO_LEVELDETECT0); - old1 = __raw_readl(bank->base + + old1 = __raw_readl(bank->base + OMAP4_GPIO_LEVELDETECT1); - __raw_writel(old0 | l, bank->base + + __raw_writel(old0 | l, bank->base + OMAP4_GPIO_LEVELDETECT0); - __raw_writel(old1 | l, bank->base + + __raw_writel(old1 | l, bank->base + OMAP4_GPIO_LEVELDETECT1); - __raw_writel(old0, bank->base + + __raw_writel(old0, bank->base + OMAP4_GPIO_LEVELDETECT0); - __raw_writel(old1, bank->base + + __raw_writel(old1, bank->base + OMAP4_GPIO_LEVELDETECT1); -#endif + } } } @@ -2144,7 +2238,7 @@ void omap2_gpio_resume_after_retention(void) #endif -#ifdef CONFIG_ARCH_OMAP34XX +#ifdef CONFIG_ARCH_OMAP3 /* save the registers of bank 2-6 */ void omap_gpio_save_context(void) { @@ -2175,10 +2269,6 @@ void omap_gpio_save_context(void) __raw_readl(bank->base + OMAP24XX_GPIO_FALLINGDETECT); gpio_context[i].dataout = __raw_readl(bank->base + OMAP24XX_GPIO_DATAOUT); - gpio_context[i].setwkuena = - __raw_readl(bank->base + OMAP24XX_GPIO_SETWKUENA); - gpio_context[i].setdataout = - __raw_readl(bank->base + OMAP24XX_GPIO_SETDATAOUT); } } @@ -2211,10 +2301,6 @@ void omap_gpio_restore_context(void) bank->base + OMAP24XX_GPIO_FALLINGDETECT); __raw_writel(gpio_context[i].dataout, bank->base + OMAP24XX_GPIO_DATAOUT); - __raw_writel(gpio_context[i].setwkuena, - bank->base + OMAP24XX_GPIO_SETWKUENA); - __raw_writel(gpio_context[i].setdataout, - bank->base + OMAP24XX_GPIO_SETDATAOUT); } } #endif @@ -2240,8 +2326,7 @@ static int __init omap_gpio_sysinit(void) mpuio_init(); -#if defined(CONFIG_ARCH_OMAP16XX) || defined(CONFIG_ARCH_OMAP24XX) || \ - defined(CONFIG_ARCH_OMAP34XX) || defined(CONFIG_ARCH_OMAP4) +#if defined(CONFIG_ARCH_OMAP16XX) || defined(CONFIG_ARCH_OMAP2PLUS) if (cpu_is_omap16xx() || cpu_class_is_omap2()) { if (ret == 0) { ret = sysdev_class_register(&omap_gpio_sysclass); @@ -2255,111 +2340,3 @@ static int __init omap_gpio_sysinit(void) } arch_initcall(omap_gpio_sysinit); - - -#ifdef CONFIG_DEBUG_FS - -#include <linux/debugfs.h> -#include <linux/seq_file.h> - -static int dbg_gpio_show(struct seq_file *s, void *unused) -{ - unsigned i, j, gpio; - - for (i = 0, gpio = 0; i < gpio_bank_count; i++) { - struct gpio_bank *bank = gpio_bank + i; - unsigned bankwidth = 16; - u32 mask = 1; - - if (bank_is_mpuio(bank)) - gpio = OMAP_MPUIO(0); - else if (cpu_class_is_omap2() || cpu_is_omap7xx()) - bankwidth = 32; - - for (j = 0; j < bankwidth; j++, gpio++, mask <<= 1) { - unsigned irq, value, is_in, irqstat; - const char *label; - - label = gpiochip_is_requested(&bank->chip, j); - if (!label) - continue; - - irq = bank->virtual_irq_start + j; - value = gpio_get_value(gpio); - is_in = gpio_is_input(bank, mask); - - if (bank_is_mpuio(bank)) - seq_printf(s, "MPUIO %2d ", j); - else - seq_printf(s, "GPIO %3d ", gpio); - seq_printf(s, "(%-20.20s): %s %s", - label, - is_in ? "in " : "out", - value ? "hi" : "lo"); - -/* FIXME for at least omap2, show pullup/pulldown state */ - - irqstat = irq_desc[irq].status; -#if defined(CONFIG_ARCH_OMAP16XX) || defined(CONFIG_ARCH_OMAP24XX) || \ - defined(CONFIG_ARCH_OMAP34XX) || defined(CONFIG_ARCH_OMAP4) - if (is_in && ((bank->suspend_wakeup & mask) - || irqstat & IRQ_TYPE_SENSE_MASK)) { - char *trigger = NULL; - - switch (irqstat & IRQ_TYPE_SENSE_MASK) { - case IRQ_TYPE_EDGE_FALLING: - trigger = "falling"; - break; - case IRQ_TYPE_EDGE_RISING: - trigger = "rising"; - break; - case IRQ_TYPE_EDGE_BOTH: - trigger = "bothedge"; - break; - case IRQ_TYPE_LEVEL_LOW: - trigger = "low"; - break; - case IRQ_TYPE_LEVEL_HIGH: - trigger = "high"; - break; - case IRQ_TYPE_NONE: - trigger = "(?)"; - break; - } - seq_printf(s, ", irq-%d %-8s%s", - irq, trigger, - (bank->suspend_wakeup & mask) - ? " wakeup" : ""); - } -#endif - seq_printf(s, "\n"); - } - - if (bank_is_mpuio(bank)) { - seq_printf(s, "\n"); - gpio = 0; - } - } - return 0; -} - -static int dbg_gpio_open(struct inode *inode, struct file *file) -{ - return single_open(file, dbg_gpio_show, &inode->i_private); -} - -static const struct file_operations debug_fops = { - .open = dbg_gpio_open, - .read = seq_read, - .llseek = seq_lseek, - .release = single_release, -}; - -static int __init omap_gpio_debuginit(void) -{ - (void) debugfs_create_file("omap_gpio", S_IRUGO, - NULL, NULL, &debug_fops); - return 0; -} -late_initcall(omap_gpio_debuginit); -#endif |