diff options
Diffstat (limited to 'arch/arm/plat-omap/gpio.c')
| -rw-r--r-- | arch/arm/plat-omap/gpio.c | 1836 |
1 files changed, 0 insertions, 1836 deletions
diff --git a/arch/arm/plat-omap/gpio.c b/arch/arm/plat-omap/gpio.c deleted file mode 100644 index 8c78e4e57b5..00000000000 --- a/arch/arm/plat-omap/gpio.c +++ /dev/null @@ -1,1836 +0,0 @@ -/* - * linux/arch/arm/plat-omap/gpio.c - * - * Support functions for OMAP GPIO - * - * Copyright (C) 2003-2005 Nokia Corporation - * Written by Juha Yrjölä <juha.yrjola@nokia.com> - * - * This program is free software; you can redistribute it and/or modify - * it under the terms of the GNU General Public License version 2 as - * published by the Free Software Foundation. - */ - -#include <linux/init.h> -#include <linux/module.h> -#include <linux/interrupt.h> -#include <linux/sysdev.h> -#include <linux/err.h> -#include <linux/clk.h> - -#include <asm/hardware.h> -#include <asm/irq.h> -#include <asm/arch/irqs.h> -#include <asm/arch/gpio.h> -#include <asm/mach/irq.h> - -#include <asm/io.h> - -/* - * OMAP1510 GPIO registers - */ -#define OMAP1510_GPIO_BASE (void __iomem *)0xfffce000 -#define OMAP1510_GPIO_DATA_INPUT 0x00 -#define OMAP1510_GPIO_DATA_OUTPUT 0x04 -#define OMAP1510_GPIO_DIR_CONTROL 0x08 -#define OMAP1510_GPIO_INT_CONTROL 0x0c -#define OMAP1510_GPIO_INT_MASK 0x10 -#define OMAP1510_GPIO_INT_STATUS 0x14 -#define OMAP1510_GPIO_PIN_CONTROL 0x18 - -#define OMAP1510_IH_GPIO_BASE 64 - -/* - * OMAP1610 specific GPIO registers - */ -#define OMAP1610_GPIO1_BASE (void __iomem *)0xfffbe400 -#define OMAP1610_GPIO2_BASE (void __iomem *)0xfffbec00 -#define OMAP1610_GPIO3_BASE (void __iomem *)0xfffbb400 -#define OMAP1610_GPIO4_BASE (void __iomem *)0xfffbbc00 -#define OMAP1610_GPIO_REVISION 0x0000 -#define OMAP1610_GPIO_SYSCONFIG 0x0010 -#define OMAP1610_GPIO_SYSSTATUS 0x0014 -#define OMAP1610_GPIO_IRQSTATUS1 0x0018 -#define OMAP1610_GPIO_IRQENABLE1 0x001c -#define OMAP1610_GPIO_WAKEUPENABLE 0x0028 -#define OMAP1610_GPIO_DATAIN 0x002c -#define OMAP1610_GPIO_DATAOUT 0x0030 -#define OMAP1610_GPIO_DIRECTION 0x0034 -#define OMAP1610_GPIO_EDGE_CTRL1 0x0038 -#define OMAP1610_GPIO_EDGE_CTRL2 0x003c -#define OMAP1610_GPIO_CLEAR_IRQENABLE1 0x009c -#define OMAP1610_GPIO_CLEAR_WAKEUPENA 0x00a8 -#define OMAP1610_GPIO_CLEAR_DATAOUT 0x00b0 -#define OMAP1610_GPIO_SET_IRQENABLE1 0x00dc -#define OMAP1610_GPIO_SET_WAKEUPENA 0x00e8 -#define OMAP1610_GPIO_SET_DATAOUT 0x00f0 - -/* - * OMAP730 specific GPIO registers - */ -#define OMAP730_GPIO1_BASE (void __iomem *)0xfffbc000 -#define OMAP730_GPIO2_BASE (void __iomem *)0xfffbc800 -#define OMAP730_GPIO3_BASE (void __iomem *)0xfffbd000 -#define OMAP730_GPIO4_BASE (void __iomem *)0xfffbd800 -#define OMAP730_GPIO5_BASE (void __iomem *)0xfffbe000 -#define OMAP730_GPIO6_BASE (void __iomem *)0xfffbe800 -#define OMAP730_GPIO_DATA_INPUT 0x00 -#define OMAP730_GPIO_DATA_OUTPUT 0x04 -#define OMAP730_GPIO_DIR_CONTROL 0x08 -#define OMAP730_GPIO_INT_CONTROL 0x0c -#define OMAP730_GPIO_INT_MASK 0x10 -#define OMAP730_GPIO_INT_STATUS 0x14 - -/* - * omap24xx specific GPIO registers - */ -#define OMAP242X_GPIO1_BASE (void __iomem *)0x48018000 -#define OMAP242X_GPIO2_BASE (void __iomem *)0x4801a000 -#define OMAP242X_GPIO3_BASE (void __iomem *)0x4801c000 -#define OMAP242X_GPIO4_BASE (void __iomem *)0x4801e000 - -#define OMAP243X_GPIO1_BASE (void __iomem *)0x4900C000 -#define OMAP243X_GPIO2_BASE (void __iomem *)0x4900E000 -#define OMAP243X_GPIO3_BASE (void __iomem *)0x49010000 -#define OMAP243X_GPIO4_BASE (void __iomem *)0x49012000 -#define OMAP243X_GPIO5_BASE (void __iomem *)0x480B6000 - -#define OMAP24XX_GPIO_REVISION 0x0000 -#define OMAP24XX_GPIO_SYSCONFIG 0x0010 -#define OMAP24XX_GPIO_SYSSTATUS 0x0014 -#define OMAP24XX_GPIO_IRQSTATUS1 0x0018 -#define OMAP24XX_GPIO_IRQSTATUS2 0x0028 -#define OMAP24XX_GPIO_IRQENABLE2 0x002c -#define OMAP24XX_GPIO_IRQENABLE1 0x001c -#define OMAP24XX_GPIO_CTRL 0x0030 -#define OMAP24XX_GPIO_OE 0x0034 -#define OMAP24XX_GPIO_DATAIN 0x0038 -#define OMAP24XX_GPIO_DATAOUT 0x003c -#define OMAP24XX_GPIO_LEVELDETECT0 0x0040 -#define OMAP24XX_GPIO_LEVELDETECT1 0x0044 -#define OMAP24XX_GPIO_RISINGDETECT 0x0048 -#define OMAP24XX_GPIO_FALLINGDETECT 0x004c -#define OMAP24XX_GPIO_DEBOUNCE_EN 0x0050 -#define OMAP24XX_GPIO_DEBOUNCE_VAL 0x0054 -#define OMAP24XX_GPIO_CLEARIRQENABLE1 0x0060 -#define OMAP24XX_GPIO_SETIRQENABLE1 0x0064 -#define OMAP24XX_GPIO_CLEARWKUENA 0x0080 -#define OMAP24XX_GPIO_SETWKUENA 0x0084 -#define OMAP24XX_GPIO_CLEARDATAOUT 0x0090 -#define OMAP24XX_GPIO_SETDATAOUT 0x0094 - -/* - * omap34xx specific GPIO registers - */ - -#define OMAP34XX_GPIO1_BASE (void __iomem *)0x48310000 -#define OMAP34XX_GPIO2_BASE (void __iomem *)0x49050000 -#define OMAP34XX_GPIO3_BASE (void __iomem *)0x49052000 -#define OMAP34XX_GPIO4_BASE (void __iomem *)0x49054000 -#define OMAP34XX_GPIO5_BASE (void __iomem *)0x49056000 -#define OMAP34XX_GPIO6_BASE (void __iomem *)0x49058000 - - -struct gpio_bank { - void __iomem *base; - u16 irq; - u16 virtual_irq_start; - int method; - u32 reserved_map; -#if defined(CONFIG_ARCH_OMAP16XX) || defined(CONFIG_ARCH_OMAP24XX) || defined(CONFIG_ARCH_OMAP34XX) - u32 suspend_wakeup; - u32 saved_wakeup; -#endif -#if defined(CONFIG_ARCH_OMAP24XX) || defined(CONFIG_ARCH_OMAP34XX) - u32 non_wakeup_gpios; - u32 enabled_non_wakeup_gpios; - - u32 saved_datain; - u32 saved_fallingdetect; - u32 saved_risingdetect; -#endif - spinlock_t lock; -}; - -#define METHOD_MPUIO 0 -#define METHOD_GPIO_1510 1 -#define METHOD_GPIO_1610 2 -#define METHOD_GPIO_730 3 -#define METHOD_GPIO_24XX 4 - -#ifdef CONFIG_ARCH_OMAP16XX -static struct gpio_bank gpio_bank_1610[5] = { - { OMAP_MPUIO_BASE, INT_MPUIO, IH_MPUIO_BASE, METHOD_MPUIO}, - { OMAP1610_GPIO1_BASE, INT_GPIO_BANK1, IH_GPIO_BASE, METHOD_GPIO_1610 }, - { OMAP1610_GPIO2_BASE, INT_1610_GPIO_BANK2, IH_GPIO_BASE + 16, METHOD_GPIO_1610 }, - { OMAP1610_GPIO3_BASE, INT_1610_GPIO_BANK3, IH_GPIO_BASE + 32, METHOD_GPIO_1610 }, - { OMAP1610_GPIO4_BASE, INT_1610_GPIO_BANK4, IH_GPIO_BASE + 48, METHOD_GPIO_1610 }, -}; -#endif - -#ifdef CONFIG_ARCH_OMAP15XX -static struct gpio_bank gpio_bank_1510[2] = { - { OMAP_MPUIO_BASE, INT_MPUIO, IH_MPUIO_BASE, METHOD_MPUIO }, - { OMAP1510_GPIO_BASE, INT_GPIO_BANK1, IH_GPIO_BASE, METHOD_GPIO_1510 } -}; -#endif - -#ifdef CONFIG_ARCH_OMAP730 -static struct gpio_bank gpio_bank_730[7] = { - { OMAP_MPUIO_BASE, INT_730_MPUIO, IH_MPUIO_BASE, METHOD_MPUIO }, - { OMAP730_GPIO1_BASE, INT_730_GPIO_BANK1, IH_GPIO_BASE, METHOD_GPIO_730 }, - { OMAP730_GPIO2_BASE, INT_730_GPIO_BANK2, IH_GPIO_BASE + 32, METHOD_GPIO_730 }, - { OMAP730_GPIO3_BASE, INT_730_GPIO_BANK3, IH_GPIO_BASE + 64, METHOD_GPIO_730 }, - { OMAP730_GPIO4_BASE, INT_730_GPIO_BANK4, IH_GPIO_BASE + 96, METHOD_GPIO_730 }, - { OMAP730_GPIO5_BASE, INT_730_GPIO_BANK5, IH_GPIO_BASE + 128, METHOD_GPIO_730 }, - { OMAP730_GPIO6_BASE, INT_730_GPIO_BANK6, IH_GPIO_BASE + 160, METHOD_GPIO_730 }, -}; -#endif - -#ifdef CONFIG_ARCH_OMAP24XX - -static struct gpio_bank gpio_bank_242x[4] = { - { OMAP242X_GPIO1_BASE, INT_24XX_GPIO_BANK1, IH_GPIO_BASE, METHOD_GPIO_24XX }, - { OMAP242X_GPIO2_BASE, INT_24XX_GPIO_BANK2, IH_GPIO_BASE + 32, METHOD_GPIO_24XX }, - { OMAP242X_GPIO3_BASE, INT_24XX_GPIO_BANK3, IH_GPIO_BASE + 64, METHOD_GPIO_24XX }, - { OMAP242X_GPIO4_BASE, INT_24XX_GPIO_BANK4, IH_GPIO_BASE + 96, METHOD_GPIO_24XX }, -}; - -static struct gpio_bank gpio_bank_243x[5] = { - { OMAP243X_GPIO1_BASE, INT_24XX_GPIO_BANK1, IH_GPIO_BASE, METHOD_GPIO_24XX }, - { OMAP243X_GPIO2_BASE, INT_24XX_GPIO_BANK2, IH_GPIO_BASE + 32, METHOD_GPIO_24XX }, - { OMAP243X_GPIO3_BASE, INT_24XX_GPIO_BANK3, IH_GPIO_BASE + 64, METHOD_GPIO_24XX }, - { OMAP243X_GPIO4_BASE, INT_24XX_GPIO_BANK4, IH_GPIO_BASE + 96, METHOD_GPIO_24XX }, - { OMAP243X_GPIO5_BASE, INT_24XX_GPIO_BANK5, IH_GPIO_BASE + 128, METHOD_GPIO_24XX }, -}; - -#endif - -#ifdef CONFIG_ARCH_OMAP34XX -static struct gpio_bank gpio_bank_34xx[6] = { - { OMAP34XX_GPIO1_BASE, INT_34XX_GPIO_BANK1, IH_GPIO_BASE, METHOD_GPIO_24XX }, - { OMAP34XX_GPIO2_BASE, INT_34XX_GPIO_BANK2, IH_GPIO_BASE + 32, METHOD_GPIO_24XX }, - { OMAP34XX_GPIO3_BASE, INT_34XX_GPIO_BANK3, IH_GPIO_BASE + 64, METHOD_GPIO_24XX }, - { OMAP34XX_GPIO4_BASE, INT_34XX_GPIO_BANK4, IH_GPIO_BASE + 96, METHOD_GPIO_24XX }, - { OMAP34XX_GPIO5_BASE, INT_34XX_GPIO_BANK5, IH_GPIO_BASE + 128, METHOD_GPIO_24XX }, - { OMAP34XX_GPIO6_BASE, INT_34XX_GPIO_BANK6, IH_GPIO_BASE + 160, METHOD_GPIO_24XX }, -}; - -#endif - -static struct gpio_bank *gpio_bank; -static int gpio_bank_count; - -static inline struct gpio_bank *get_gpio_bank(int gpio) -{ - if (cpu_is_omap15xx()) { - if (OMAP_GPIO_IS_MPUIO(gpio)) - return &gpio_bank[0]; - return &gpio_bank[1]; - } - if (cpu_is_omap16xx()) { - if (OMAP_GPIO_IS_MPUIO(gpio)) - return &gpio_bank[0]; - return &gpio_bank[1 + (gpio >> 4)]; - } - if (cpu_is_omap730()) { - if (OMAP_GPIO_IS_MPUIO(gpio)) - return &gpio_bank[0]; - return &gpio_bank[1 + (gpio >> 5)]; - } - if (cpu_is_omap24xx()) - return &gpio_bank[gpio >> 5]; - if (cpu_is_omap34xx()) - return &gpio_bank[gpio >> 5]; -} - -static inline int get_gpio_index(int gpio) -{ - if (cpu_is_omap730()) - return gpio & 0x1f; - if (cpu_is_omap24xx()) - return gpio & 0x1f; - if (cpu_is_omap34xx()) - return gpio & 0x1f; - return gpio & 0x0f; -} - -static inline int gpio_valid(int gpio) -{ - if (gpio < 0) - return -1; - if (cpu_class_is_omap1() && OMAP_GPIO_IS_MPUIO(gpio)) { - if (gpio >= OMAP_MAX_GPIO_LINES + 16) - return -1; - return 0; - } - if (cpu_is_omap15xx() && gpio < 16) - return 0; - if ((cpu_is_omap16xx()) && gpio < 64) - return 0; - if (cpu_is_omap730() && gpio < 192) - return 0; - if (cpu_is_omap24xx() && gpio < 128) - return 0; - if (cpu_is_omap34xx() && gpio < 160) - return 0; - return -1; -} - -static int check_gpio(int gpio) -{ - if (unlikely(gpio_valid(gpio)) < 0) { - printk(KERN_ERR "omap-gpio: invalid GPIO %d\n", gpio); - dump_stack(); - return -1; - } - return 0; -} - -static void _set_gpio_direction(struct gpio_bank *bank, int gpio, int is_input) -{ - void __iomem *reg = bank->base; - u32 l; - - switch (bank->method) { -#ifdef CONFIG_ARCH_OMAP1 - case METHOD_MPUIO: - reg += OMAP_MPUIO_IO_CNTL; - break; -#endif -#ifdef CONFIG_ARCH_OMAP15XX - case METHOD_GPIO_1510: - reg += OMAP1510_GPIO_DIR_CONTROL; - break; -#endif -#ifdef CONFIG_ARCH_OMAP16XX - case METHOD_GPIO_1610: - reg += OMAP1610_GPIO_DIRECTION; - break; -#endif -#ifdef CONFIG_ARCH_OMAP730 - case METHOD_GPIO_730: - reg += OMAP730_GPIO_DIR_CONTROL; - break; -#endif -#if defined(CONFIG_ARCH_OMAP24XX) || defined(CONFIG_ARCH_OMAP34XX) - case METHOD_GPIO_24XX: - reg += OMAP24XX_GPIO_OE; - break; -#endif - default: - WARN_ON(1); - return; - } - l = __raw_readl(reg); - if (is_input) - l |= 1 << gpio; - else - l &= ~(1 << gpio); - __raw_writel(l, reg); -} - -void omap_set_gpio_direction(int gpio, int is_input) -{ - struct gpio_bank *bank; - unsigned long flags; - - if (check_gpio(gpio) < 0) - return; - bank = get_gpio_bank(gpio); - spin_lock_irqsave(&bank->lock, flags); - _set_gpio_direction(bank, get_gpio_index(gpio), is_input); - spin_unlock_irqrestore(&bank->lock, flags); -} - -static void _set_gpio_dataout(struct gpio_bank *bank, int gpio, int enable) -{ - void __iomem *reg = bank->base; - u32 l = 0; - - switch (bank->method) { -#ifdef CONFIG_ARCH_OMAP1 - case METHOD_MPUIO: - reg += OMAP_MPUIO_OUTPUT; - l = __raw_readl(reg); - if (enable) - l |= 1 << gpio; - else - l &= ~(1 << gpio); - break; -#endif -#ifdef CONFIG_ARCH_OMAP15XX - case METHOD_GPIO_1510: - reg += OMAP1510_GPIO_DATA_OUTPUT; - l = __raw_readl(reg); - if (enable) - l |= 1 << gpio; - else - l &= ~(1 << gpio); - break; -#endif -#ifdef CONFIG_ARCH_OMAP16XX - case METHOD_GPIO_1610: - if (enable) - reg += OMAP1610_GPIO_SET_DATAOUT; - else - reg += OMAP1610_GPIO_CLEAR_DATAOUT; - l = 1 << gpio; - break; -#endif -#ifdef CONFIG_ARCH_OMAP730 - case METHOD_GPIO_730: - reg += OMAP730_GPIO_DATA_OUTPUT; - l = __raw_readl(reg); - if (enable) - l |= 1 << gpio; - else - l &= ~(1 << gpio); - break; -#endif -#if defined(CONFIG_ARCH_OMAP24XX) || defined(CONFIG_ARCH_OMAP34XX) - case METHOD_GPIO_24XX: - if (enable) - reg += OMAP24XX_GPIO_SETDATAOUT; - else - reg += OMAP24XX_GPIO_CLEARDATAOUT; - l = 1 << gpio; - break; -#endif - default: - WARN_ON(1); - return; - } - __raw_writel(l, reg); -} - -void omap_set_gpio_dataout(int gpio, int enable) -{ - struct gpio_bank *bank; - unsigned long flags; - - if (check_gpio(gpio) < 0) - return; - bank = get_gpio_bank(gpio); - spin_lock_irqsave(&bank->lock, flags); - _set_gpio_dataout(bank, get_gpio_index(gpio), enable); - spin_unlock_irqrestore(&bank->lock, flags); -} - -int omap_get_gpio_datain(int gpio) -{ - struct gpio_bank *bank; - void __iomem *reg; - - if (check_gpio(gpio) < 0) - return -EINVAL; - bank = get_gpio_bank(gpio); - reg = bank->base; - switch (bank->method) { -#ifdef CONFIG_ARCH_OMAP1 - case METHOD_MPUIO: - reg += OMAP_MPUIO_INPUT_LATCH; - break; -#endif -#ifdef CONFIG_ARCH_OMAP15XX - case METHOD_GPIO_1510: - reg += OMAP1510_GPIO_DATA_INPUT; - break; -#endif -#ifdef CONFIG_ARCH_OMAP16XX - case METHOD_GPIO_1610: - reg += OMAP1610_GPIO_DATAIN; - break; -#endif -#ifdef CONFIG_ARCH_OMAP730 - case METHOD_GPIO_730: - reg += OMAP730_GPIO_DATA_INPUT; - break; -#endif -#if defined(CONFIG_ARCH_OMAP24XX) || defined(CONFIG_ARCH_OMAP34XX) - case METHOD_GPIO_24XX: - reg += OMAP24XX_GPIO_DATAIN; - break; -#endif - default: - return -EINVAL; - } - return (__raw_readl(reg) - & (1 << get_gpio_index(gpio))) != 0; -} - -#define MOD_REG_BIT(reg, bit_mask, set) \ -do { \ - int l = __raw_readl(base + reg); \ - if (set) l |= bit_mask; \ - else l &= ~bit_mask; \ - __raw_writel(l, base + reg); \ -} while(0) - -void omap_set_gpio_debounce(int gpio, int enable) -{ - struct gpio_bank *bank; - void __iomem *reg; - u32 val, l = 1 << get_gpio_index(gpio); - - if (cpu_class_is_omap1()) - return; - - bank = get_gpio_bank(gpio); - reg = bank->base; - - reg += OMAP24XX_GPIO_DEBOUNCE_EN; - val = __raw_readl(reg); - - if (enable) - val |= l; - else - val &= ~l; - - __raw_writel(val, reg); -} -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; - - enc_time &= 0xff; - reg += OMAP24XX_GPIO_DEBOUNCE_VAL; - __raw_writel(enc_time, reg); -} -EXPORT_SYMBOL(omap_set_gpio_debounce_time); - -#if defined(CONFIG_ARCH_OMAP24XX) || defined(CONFIG_ARCH_OMAP34XX) -static inline void set_24xx_gpio_triggering(struct gpio_bank *bank, int gpio, - int trigger) -{ - void __iomem *base = bank->base; - u32 gpio_bit = 1 << gpio; - - MOD_REG_BIT(OMAP24XX_GPIO_LEVELDETECT0, gpio_bit, - trigger & __IRQT_LOWLVL); - MOD_REG_BIT(OMAP24XX_GPIO_LEVELDETECT1, gpio_bit, - trigger & __IRQT_HIGHLVL); - MOD_REG_BIT(OMAP24XX_GPIO_RISINGDETECT, gpio_bit, - trigger & __IRQT_RISEDGE); - MOD_REG_BIT(OMAP24XX_GPIO_FALLINGDETECT, gpio_bit, - trigger & __IRQT_FALEDGE); - - if (likely(!(bank->non_wakeup_gpios & gpio_bit))) { - if (trigger != 0) - __raw_writel(1 << gpio, bank->base - + OMAP24XX_GPIO_SETWKUENA); - else - __raw_writel(1 << gpio, bank->base - + OMAP24XX_GPIO_CLEARWKUENA); - } else { - if (trigger != 0) - bank->enabled_non_wakeup_gpios |= gpio_bit; - else - bank->enabled_non_wakeup_gpios &= ~gpio_bit; - } - - /* - * FIXME: Possibly do 'set_irq_handler(j, handle_level_irq)' if only - * level triggering requested. - */ -} -#endif - -static int _set_gpio_triggering(struct gpio_bank *bank, int gpio, int trigger) -{ - void __iomem *reg = bank->base; - u32 l = 0; - - switch (bank->method) { -#ifdef CONFIG_ARCH_OMAP1 - case METHOD_MPUIO: - reg += OMAP_MPUIO_GPIO_INT_EDGE; - l = __raw_readl(reg); - if (trigger & __IRQT_RISEDGE) - l |= 1 << gpio; - else if (trigger & __IRQT_FALEDGE) - l &= ~(1 << gpio); - else - goto bad; - break; -#endif -#ifdef CONFIG_ARCH_OMAP15XX - case METHOD_GPIO_1510: - reg += OMAP1510_GPIO_INT_CONTROL; - l = __raw_readl(reg); - if (trigger & __IRQT_RISEDGE) - l |= 1 << gpio; - else if (trigger & __IRQT_FALEDGE) - l &= ~(1 << gpio); - else - goto bad; - break; -#endif -#ifdef CONFIG_ARCH_OMAP16XX - case METHOD_GPIO_1610: - if (gpio & 0x08) - reg += OMAP1610_GPIO_EDGE_CTRL2; - else - reg += OMAP1610_GPIO_EDGE_CTRL1; - gpio &= 0x07; - l = __raw_readl(reg); - l &= ~(3 << (gpio << 1)); - if (trigger & __IRQT_RISEDGE) - l |= 2 << (gpio << 1); - if (trigger & __IRQT_FALEDGE) - l |= 1 << (gpio << 1); - if (trigger) - /* Enable wake-up during idle for dynamic tick */ - __raw_writel(1 << gpio, bank->base + OMAP1610_GPIO_SET_WAKEUPENA); - else - __raw_writel(1 << gpio, bank->base + OMAP1610_GPIO_CLEAR_WAKEUPENA); - break; -#endif -#ifdef CONFIG_ARCH_OMAP730 - case METHOD_GPIO_730: - reg += OMAP730_GPIO_INT_CONTROL; - l = __raw_readl(reg); - if (trigger & __IRQT_RISEDGE) - l |= 1 << gpio; - else if (trigger & __IRQT_FALEDGE) - l &= ~(1 << gpio); - else - goto bad; - break; -#endif -#if defined(CONFIG_ARCH_OMAP24XX) || defined(CONFIG_ARCH_OMAP34XX) - case METHOD_GPIO_24XX: - set_24xx_gpio_triggering(bank, gpio, trigger); - break; -#endif - default: - goto bad; - } - __raw_writel(l, reg); - return 0; -bad: - return -EINVAL; -} - -static int gpio_irq_type(unsigned irq, unsigned type) -{ - struct gpio_bank *bank; - unsigned gpio; - int retval; - unsigned long flags; - - if (!cpu_class_is_omap2() && irq > IH_MPUIO_BASE) - gpio = OMAP_MPUIO(irq - IH_MPUIO_BASE); - else - gpio = irq - IH_GPIO_BASE; - - if (check_gpio(gpio) < 0) - return -EINVAL; - - if (type & ~IRQ_TYPE_SENSE_MASK) - return -EINVAL; - - /* OMAP1 allows only only edge triggering */ - if (!cpu_class_is_omap2() - && (type & (IRQ_TYPE_LEVEL_LOW|IRQ_TYPE_LEVEL_HIGH))) - return -EINVAL; - - bank = get_irq_chip_data(irq); - spin_lock_irqsave(&bank->lock, flags); - retval = _set_gpio_triggering(bank, get_gpio_index(gpio), type); - if (retval == 0) { - irq_desc[irq].status &= ~IRQ_TYPE_SENSE_MASK; - irq_desc[irq].status |= type; - } - spin_unlock_irqrestore(&bank->lock, flags); - return retval; -} - -static void _clear_gpio_irqbank(struct gpio_bank *bank, int gpio_mask) -{ - void __iomem *reg = bank->base; - - switch (bank->method) { -#ifdef CONFIG_ARCH_OMAP1 - case METHOD_MPUIO: - /* MPUIO irqstatus is reset by reading the status register, - * so do nothing here */ - return; -#endif -#ifdef CONFIG_ARCH_OMAP15XX - case METHOD_GPIO_1510: - reg += OMAP1510_GPIO_INT_STATUS; - break; -#endif -#ifdef CONFIG_ARCH_OMAP16XX - case METHOD_GPIO_1610: - reg += OMAP1610_GPIO_IRQSTATUS1; - break; -#endif -#ifdef CONFIG_ARCH_OMAP730 - case METHOD_GPIO_730: - reg += OMAP730_GPIO_INT_STATUS; - break; -#endif -#if defined(CONFIG_ARCH_OMAP24XX) || defined(CONFIG_ARCH_OMAP34XX) - case METHOD_GPIO_24XX: - reg += OMAP24XX_GPIO_IRQSTATUS1; - break; -#endif - default: - WARN_ON(1); - return; - } - __raw_writel(gpio_mask, reg); - - /* Workaround for clearing DSP GPIO interrupts to allow retention */ -#if defined(CONFIG_ARCH_OMAP24XX) || defined(CONFIG_ARCH_OMAP34XX) - if (cpu_is_omap24xx() || cpu_is_omap34xx()) - __raw_writel(gpio_mask, bank->base + OMAP24XX_GPIO_IRQSTATUS2); -#endif -} - -static inline void _clear_gpio_irqstatus(struct gpio_bank *bank, int gpio) -{ - _clear_gpio_irqbank(bank, 1 << get_gpio_index(gpio)); -} - -static u32 _get_gpio_irqbank_mask(struct gpio_bank *bank) -{ - void __iomem *reg = bank->base; - int inv = 0; - u32 l; - u32 mask; - - switch (bank->method) { -#ifdef CONFIG_ARCH_OMAP1 - case METHOD_MPUIO: - reg += OMAP_MPUIO_GPIO_MASKIT; - mask = 0xffff; - inv = 1; - break; -#endif -#ifdef CONFIG_ARCH_OMAP15XX - case METHOD_GPIO_1510: - reg += OMAP1510_GPIO_INT_MASK; - mask = 0xffff; - inv = 1; - break; -#endif -#ifdef CONFIG_ARCH_OMAP16XX - case METHOD_GPIO_1610: - reg += OMAP1610_GPIO_IRQENABLE1; - mask = 0xffff; - break; -#endif -#ifdef CONFIG_ARCH_OMAP730 - case METHOD_GPIO_730: - reg += OMAP730_GPIO_INT_MASK; - mask = 0xffffffff; - inv = 1; - break; -#endif -#if defined(CONFIG_ARCH_OMAP24XX) || defined(CONFIG_ARCH_OMAP34XX) - case METHOD_GPIO_24XX: - reg += OMAP24XX_GPIO_IRQENABLE1; - mask = 0xffffffff; - break; -#endif - default: - WARN_ON(1); - return 0; - } - - l = __raw_readl(reg); - if (inv) - l = ~l; - l &= mask; - return l; -} - -static void _enable_gpio_irqbank(struct gpio_bank *bank, int gpio_mask, int enable) -{ - void __iomem *reg = bank->base; - u32 l; - - switch (bank->method) { -#ifdef CONFIG_ARCH_OMAP1 - case METHOD_MPUIO: - reg += OMAP_MPUIO_GPIO_MASKIT; - l = __raw_readl(reg); - if (enable) - l &= ~(gpio_mask); - else - l |= gpio_mask; - break; -#endif -#ifdef CONFIG_ARCH_OMAP15XX - case METHOD_GPIO_1510: - reg += OMAP1510_GPIO_INT_MASK; - l = __raw_readl(reg); - if (enable) - l &= ~(gpio_mask); - else - l |= gpio_mask; - break; -#endif -#ifdef CONFIG_ARCH_OMAP16XX - case METHOD_GPIO_1610: - if (enable) - reg += OMAP1610_GPIO_SET_IRQENABLE1; - else - reg += OMAP1610_GPIO_CLEAR_IRQENABLE1; - l = gpio_mask; - break; -#endif -#ifdef CONFIG_ARCH_OMAP730 - case METHOD_GPIO_730: - reg += OMAP730_GPIO_INT_MASK; - l = __raw_readl(reg); - if (enable) - l &= ~(gpio_mask); - else - l |= gpio_mask; - break; -#endif -#if defined(CONFIG_ARCH_OMAP24XX) || defined(CONFIG_ARCH_OMAP34XX) - case METHOD_GPIO_24XX: - if (enable) - reg += OMAP24XX_GPIO_SETIRQENABLE1; - else - reg += OMAP24XX_GPIO_CLEARIRQENABLE1; - l = gpio_mask; - break; -#endif - default: - WARN_ON(1); - return; - } - __raw_writel(l, reg); -} - -static inline void _set_gpio_irqenable(struct gpio_bank *bank, int gpio, int enable) -{ - _enable_gpio_irqbank(bank, 1 << get_gpio_index(gpio), enable); -} - -/* - * Note that ENAWAKEUP needs to be enabled in GPIO_SYSCONFIG register. - * 1510 does not seem to have a wake-up register. If JTAG is connected - * to the target, system will wake up always on GPIO events. While - * system is running all registered GPIO interrupts need to have wake-up - * enabled. When system is suspended, only selected GPIO interrupts need - * to have wake-up enabled. - */ -static int _set_gpio_wakeup(struct gpio_bank *bank, int gpio, int enable) -{ - unsigned long flags; - - switch (bank->method) { -#ifdef CONFIG_ARCH_OMAP16XX - case METHOD_MPUIO: - case METHOD_GPIO_1610: - spin_lock_irqsave(&bank->lock, flags); - if (enable) { - bank->suspend_wakeup |= (1 << gpio); - enable_irq_wake(bank->irq); - } else { - disable_irq_wake(bank->irq); - bank->suspend_wakeup &= ~(1 << gpio); - } - spin_unlock_irqrestore(&bank->lock, flags); - return 0; -#endif -#if defined(CONFIG_ARCH_OMAP24XX) || defined(CONFIG_ARCH_OMAP34XX) - case METHOD_GPIO_24XX: - if (bank->non_wakeup_gpios & (1 << gpio)) { - printk(KERN_ERR "Unable to modify wakeup on " - "non-wakeup GPIO%d\n", - (bank - gpio_bank) * 32 + gpio); - return -EINVAL; - } - spin_lock_irqsave(&bank->lock, flags); - if (enable) { - bank->suspend_wakeup |= (1 << gpio); - enable_irq_wake(bank->irq); - } else { - disable_irq_wake(bank->irq); - bank->suspend_wakeup &= ~(1 << gpio); - } - spin_unlock_irqrestore(&bank->lock, flags); - return 0; -#endif - default: - printk(KERN_ERR "Can't enable GPIO wakeup for method %i\n", - bank->method); - return -EINVAL; - } -} - -static void _reset_gpio(struct gpio_bank *bank, int gpio) -{ - _set_gpio_direction(bank, get_gpio_index(gpio), 1); - _set_gpio_irqenable(bank, gpio, 0); - _clear_gpio_irqstatus(bank, gpio); - _set_gpio_triggering(bank, get_gpio_index(gpio), IRQT_NOEDGE); -} - -/* Use disable_irq_wake() and enable_irq_wake() functions from drivers */ -static int gpio_wake_enable(unsigned int irq, unsigned int enable) -{ - unsigned int gpio = irq - IH_GPIO_BASE; - struct gpio_bank *bank; - int retval; - - if (check_gpio(gpio) < 0) - return -ENODEV; - bank = get_irq_chip_data(irq); - retval = _set_gpio_wakeup(bank, get_gpio_index(gpio), enable); - - return retval; -} - -int omap_request_gpio(int gpio) -{ - struct gpio_bank *bank; - unsigned long flags; - - if (check_gpio(gpio) < 0) - return -EINVAL; - - bank = get_gpio_bank(gpio); - spin_lock_irqsave(&bank->lock, flags); - if (unlikely(bank->reserved_map & (1 << get_gpio_index(gpio)))) { - printk(KERN_ERR "omap-gpio: GPIO %d is already reserved!\n", gpio); - dump_stack(); - spin_unlock_irqrestore(&bank->lock, flags); - return -1; - } - bank->reserved_map |= (1 << get_gpio_index(gpio)); - - /* Set trigger to none. You need to enable the desired trigger with - * request_irq() or set_irq_type(). - */ - _set_gpio_triggering(bank, get_gpio_index(gpio), IRQT_NOEDGE); - -#ifdef CONFIG_ARCH_OMAP15XX - if (bank->method == METHOD_GPIO_1510) { - void __iomem *reg; - - /* Claim the pin for MPU */ - reg = bank->base + OMAP1510_GPIO_PIN_CONTROL; - __raw_writel(__raw_readl(reg) | (1 << get_gpio_index(gpio)), reg); - } -#endif - spin_unlock_irqrestore(&bank->lock, flags); - - return 0; -} - -void omap_free_gpio(int gpio) -{ - struct gpio_bank *bank; - unsigned long flags; - - if (check_gpio(gpio) < 0) - return; - bank = get_gpio_bank(gpio); - spin_lock_irqsave(&bank->lock, flags); - if (unlikely(!(bank->reserved_map & (1 << get_gpio_index(gpio))))) { - printk(KERN_ERR "omap-gpio: GPIO %d wasn't reserved!\n", gpio); - dump_stack(); - spin_unlock_irqrestore(&bank->lock, flags); - return; - } -#ifdef CONFIG_ARCH_OMAP16XX - if (bank->method == METHOD_GPIO_1610) { - /* Disable wake-up during idle for dynamic tick */ - void __iomem *reg = bank->base + OMAP1610_GPIO_CLEAR_WAKEUPENA; - __raw_writel(1 << get_gpio_index(gpio), reg); - } -#endif -#if defined(CONFIG_ARCH_OMAP24XX) || defined(CONFIG_ARCH_OMAP34XX) - 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 << get_gpio_index(gpio), reg); - } -#endif - bank->reserved_map &= ~(1 << get_gpio_index(gpio)); - _reset_gpio(bank, gpio); - spin_unlock_irqrestore(&bank->lock, flags); -} - -/* - * We need to unmask the GPIO bank interrupt as soon as possible to - * avoid missing GPIO interrupts for other lines in the bank. - * Then we need to mask-read-clear-unmask the triggered GPIO lines - * in the bank to avoid missing nested interrupts for a GPIO line. - * If we wait to unmask individual GPIO lines in the bank after the - * line's interrupt handler has been run, we may miss some nested - * interrupts. - */ -static void gpio_irq_handler(unsigned int irq, struct irq_desc *desc) -{ - void __iomem *isr_reg = NULL; - u32 isr; - unsigned int gpio_irq; - struct gpio_bank *bank; - u32 retrigger = 0; - int unmasked = 0; - - desc->chip->ack(irq); - - bank = get_irq_data(irq); -#ifdef CONFIG_ARCH_OMAP1 - if (bank->method == METHOD_MPUIO) - isr_reg = bank->base + OMAP_MPUIO_GPIO_INT; -#endif -#ifdef CONFIG_ARCH_OMAP15XX - if (bank->method == METHOD_GPIO_1510) - isr_reg = bank->base + OMAP1510_GPIO_INT_STATUS; -#endif -#if defined(CONFIG_ARCH_OMAP16XX) - if (bank->method == METHOD_GPIO_1610) - isr_reg = bank->base + OMAP1610_GPIO_IRQSTATUS1; -#endif -#ifdef CONFIG_ARCH_OMAP730 - if (bank->method == METHOD_GPIO_730) - isr_reg = bank->base + OMAP730_GPIO_INT_STATUS; -#endif -#if defined(CONFIG_ARCH_OMAP24XX) || defined(CONFIG_ARCH_OMAP34XX) - if (bank->method == METHOD_GPIO_24XX) - isr_reg = bank->base + OMAP24XX_GPIO_IRQSTATUS1; -#endif - while(1) { - u32 isr_saved, level_mask = 0; - u32 enabled; - - enabled = _get_gpio_irqbank_mask(bank); - isr_saved = isr = __raw_readl(isr_reg) & enabled; - - if (cpu_is_omap15xx() && (bank->method == METHOD_MPUIO)) - isr &= 0x0000ffff; - - if (cpu_class_is_omap2()) { - level_mask = - __raw_readl(bank->base + - OMAP24XX_GPIO_LEVELDETECT0) | - __raw_readl(bank->base + - OMAP24XX_GPIO_LEVELDETECT1); - level_mask &= enabled; - } - - /* clear edge sensitive interrupts before handler(s) are - called so that we don't miss any interrupt occurred while - executing them */ - _enable_gpio_irqbank(bank, isr_saved & ~level_mask, 0); - _clear_gpio_irqbank(bank, isr_saved & ~level_mask); - _enable_gpio_irqbank(bank, isr_saved & ~level_mask, 1); - - /* if there is only edge sensitive GPIO pin interrupts - configured, we could unmask GPIO bank interrupt immediately */ - if (!level_mask && !unmasked) { - unmasked = 1; - desc->chip->unmask(irq); - } - - isr |= retrigger; - retrigger = 0; - if (!isr) - break; - - gpio_irq = bank->virtual_irq_start; - for (; isr != 0; isr >>= 1, gpio_irq++) { - struct irq_desc *d; - int irq_mask; - if (!(isr & 1)) - continue; - d = irq_desc + gpio_irq; - /* Don't run the handler if it's already running - * or was disabled lazely. - */ - if (unlikely((d->depth || - (d->status & IRQ_INPROGRESS)))) { - irq_mask = 1 << - (gpio_irq - bank->virtual_irq_start); - /* The unmasking will be done by - * enable_irq in case it is disabled or - * after returning from the handler if - * it's already running. - */ - _enable_gpio_irqbank(bank, irq_mask, 0); - if (!d->depth) { - /* Level triggered interrupts - * won't ever be reentered - */ - BUG_ON(level_mask & irq_mask); - d->status |= IRQ_PENDING; - } - continue; - } - - desc_handle_irq(gpio_irq, d); - - if (unlikely((d->status & IRQ_PENDING) && !d->depth)) { - irq_mask = 1 << - (gpio_irq - bank->virtual_irq_start); - d->status &= ~IRQ_PENDING; - _enable_gpio_irqbank(bank, irq_mask, 1); - retrigger |= irq_mask; - } - } - - if (cpu_class_is_omap2()) { - /* clear level sensitive interrupts after handler(s) */ - _enable_gpio_irqbank(bank, isr_saved & level_mask, 0); - _clear_gpio_irqbank(bank, isr_saved & level_mask); - _enable_gpio_irqbank(bank, isr_saved & level_mask, 1); - } - - } - /* if bank has any level sensitive GPIO pin interrupt - configured, we must unmask the bank interrupt only after - handler(s) are executed in order to avoid spurious bank - interrupt */ - if (!unmasked) - desc->chip->unmask(irq); - -} - -static void gpio_irq_shutdown(unsigned int irq) -{ - unsigned int gpio = irq - IH_GPIO_BASE; - struct gpio_bank *bank = get_irq_chip_data(irq); - - _reset_gpio(bank, gpio); -} - -static void gpio_ack_irq(unsigned int irq) -{ - unsigned int gpio = irq - IH_GPIO_BASE; - struct gpio_bank *bank = get_irq_chip_data(irq); - - _clear_gpio_irqstatus(bank, gpio); -} - -static void gpio_mask_irq(unsigned int irq) -{ - unsigned int gpio = irq - IH_GPIO_BASE; - struct gpio_bank *bank = get_irq_chip_data(irq); - - _set_gpio_irqenable(bank, gpio, 0); -} - -static void gpio_unmask_irq(unsigned int irq) -{ - unsigned int gpio = irq - IH_GPIO_BASE; - struct gpio_bank *bank = get_irq_chip_data(irq); - - _set_gpio_irqenable(bank, gpio, 1); -} - -static struct irq_chip gpio_irq_chip = { - .name = "GPIO", - .shutdown = gpio_irq_shutdown, - .ack = gpio_ack_irq, - .mask = gpio_mask_irq, - .unmask = gpio_unmask_irq, - .set_type = gpio_irq_type, - .set_wake = gpio_wake_enable, -}; - -/*---------------------------------------------------------------------*/ - -#ifdef CONFIG_ARCH_OMAP1 - -/* MPUIO uses the always-on 32k clock */ - -static void mpuio_ack_irq(unsigned int irq) -{ - /* The ISR is reset automatically, so do nothing here. */ -} - -static void mpuio_mask_irq(unsigned int irq) -{ - unsigned int gpio = OMAP_MPUIO(irq - IH_MPUIO_BASE); - struct gpio_bank *bank = get_irq_chip_data(irq); - - _set_gpio_irqenable(bank, gpio, 0); -} - -static void mpuio_unmask_irq(unsigned int irq) -{ - unsigned int gpio = OMAP_MPUIO(irq - IH_MPUIO_BASE); - struct gpio_bank *bank = get_irq_chip_data(irq); - - _set_gpio_irqenable(bank, gpio, 1); -} - -static struct irq_chip mpuio_irq_chip = { - .name = "MPUIO", - .ack = mpuio_ack_irq, - .mask = mpuio_mask_irq, - .unmask = mpuio_unmask_irq, - .set_type = gpio_irq_type, -#ifdef CONFIG_ARCH_OMAP16XX - /* REVISIT: assuming only 16xx supports MPUIO wake events */ - .set_wake = gpio_wake_enable, -#endif -}; - - -#define bank_is_mpuio(bank) ((bank)->method == METHOD_MPUIO) - - -#ifdef CONFIG_ARCH_OMAP16XX - -#include <linux/platform_device.h> - -static int omap_mpuio_suspend_late(struct platform_device *pdev, pm_message_t mesg) -{ - struct gpio_bank *bank = platform_get_drvdata(pdev); - void __iomem *mask_reg = bank->base + OMAP_MPUIO_GPIO_MASKIT; - unsigned long flags; - - spin_lock_irqsave(&bank->lock, flags); - bank->saved_wakeup = __raw_readl(mask_reg); - __raw_writel(0xffff & ~bank->suspend_wakeup, mask_reg); - spin_unlock_irqrestore(&bank->lock, flags); - - return 0; -} - -static int omap_mpuio_resume_early(struct platform_device *pdev) -{ - struct gpio_bank *bank = platform_get_drvdata(pdev); - void __iomem *mask_reg = bank->base + OMAP_MPUIO_GPIO_MASKIT; - unsigned long flags; - - spin_lock_irqsave(&bank->lock, flags); - __raw_writel(bank->saved_wakeup, mask_reg); - spin_unlock_irqrestore(&bank->lock, flags); - - return 0; -} - -/* use platform_driver for this, now that there's no longer any - * point to sys_device (other than not disturbing old code). - */ -static struct platform_driver omap_mpuio_driver = { - .suspend_late = omap_mpuio_suspend_late, - .resume_early = omap_mpuio_resume_early, - .driver = { - .name = "mpuio", - }, -}; - -static struct platform_device omap_mpuio_device = { - .name = "mpuio", - .id = -1, - .dev = { - .driver = &omap_mpuio_driver.driver, - } - /* could list the /proc/iomem resources */ -}; - -static inline void mpuio_init(void) -{ - platform_set_drvdata(&omap_mpuio_device, &gpio_bank_1610[0]); - - if (platform_driver_register(&omap_mpuio_driver) == 0) - (void) platform_device_register(&omap_mpuio_device); -} - -#else -static inline void mpuio_init(void) {} -#endif /* 16xx */ - -#else - -extern struct irq_chip mpuio_irq_chip; - -#define bank_is_mpuio(bank) 0 -static inline void mpuio_init(void) {} - -#endif - -/*---------------------------------------------------------------------*/ - -static int initialized; -#if !defined(CONFIG_ARCH_OMAP3) -static struct clk * gpio_ick; -#endif - -#if defined(CONFIG_ARCH_OMAP2) -static struct clk * gpio_fck; -#endif - -#if defined(CONFIG_ARCH_OMAP2430) -static struct clk * gpio5_ick; -static struct clk * gpio5_fck; -#endif - -#if defined(CONFIG_ARCH_OMAP3) -static struct clk *gpio_fclks[OMAP34XX_NR_GPIOS]; -static struct clk *gpio_iclks[OMAP34XX_NR_GPIOS]; -#endif - -/* This lock class tells lockdep that GPIO irqs are in a different - * category than their parents, so it won't report false recursion. - */ -static struct lock_class_key gpio_lock_class; - -static int __init _omap_gpio_init(void) -{ - int i; - struct gpio_bank *bank; -#if defined(CONFIG_ARCH_OMAP3) - char clk_name[11]; -#endif - - initialized = 1; - -#if defined(CONFIG_ARCH_OMAP1) - if (cpu_is_omap15xx()) { - gpio_ick = clk_get(NULL, "arm_gpio_ck"); - if (IS_ERR(gpio_ick)) - printk("Could not get arm_gpio_ck\n"); - else - clk_enable(gpio_ick); - } -#endif -#if defined(CONFIG_ARCH_OMAP2) - if (cpu_class_is_omap2()) { - gpio_ick = clk_get(NULL, "gpios_ick"); - if (IS_ERR(gpio_ick)) - printk("Could not get gpios_ick\n"); - else - clk_enable(gpio_ick); - gpio_fck = clk_get(NULL, "gpios_fck"); - if (IS_ERR(gpio_fck)) - printk("Could not get gpios_fck\n"); - else - clk_enable(gpio_fck); - - /* - * On 2430 & 3430 GPIO 5 uses CORE L4 ICLK - */ -#if defined(CONFIG_ARCH_OMAP2430) - if (cpu_is_omap2430()) { - gpio5_ick = clk_get(NULL, "gpio5_ick"); - if (IS_ERR(gpio5_ick)) - printk("Could not get gpio5_ick\n"); - else - clk_enable(gpio5_ick); - gpio5_fck = clk_get(NULL, "gpio5_fck"); - if (IS_ERR(gpio5_fck)) - printk("Could not get gpio5_fck\n"); - else - clk_enable(gpio5_fck); - } -#endif - } -#endif - -#if defined(CONFIG_ARCH_OMAP3) - if (cpu_is_omap34xx()) { - for (i = 0; i < OMAP34XX_NR_GPIOS; i++) { - sprintf(clk_name, "gpio%d_ick", i + 1); - gpio_iclks[i] = clk_get(NULL, clk_name); - if (IS_ERR(gpio_iclks[i])) - printk(KERN_ERR "Could not get %s\n", clk_name); - else - clk_enable(gpio_iclks[i]); - sprintf(clk_name, "gpio%d_fck", i + 1); - gpio_fclks[i] = clk_get(NULL, clk_name); - if (IS_ERR(gpio_fclks[i])) - printk(KERN_ERR "Could not get %s\n", clk_name); - else - clk_enable(gpio_fclks[i]); - } - } -#endif - - -#ifdef CONFIG_ARCH_OMAP15XX - if (cpu_is_omap15xx()) { - printk(KERN_INFO "OMAP1510 GPIO hardware\n"); - gpio_bank_count = 2; - gpio_bank = gpio_bank_1510; - } -#endif -#if defined(CONFIG_ARCH_OMAP16XX) - if (cpu_is_omap16xx()) { - u32 rev; - - gpio_bank_count = 5; - gpio_bank = gpio_bank_1610; - rev = omap_readw(gpio_bank[1].base + OMAP1610_GPIO_REVISION); - printk(KERN_INFO "OMAP GPIO hardware version %d.%d\n", - (rev >> 4) & 0x0f, rev & 0x0f); - } -#endif -#ifdef CONFIG_ARCH_OMAP730 - if (cpu_is_omap730()) { - printk(KERN_INFO "OMAP730 GPIO hardware\n"); - gpio_bank_count = 7; - gpio_bank = gpio_bank_730; - } -#endif - -#ifdef CONFIG_ARCH_OMAP24XX - if (cpu_is_omap242x()) { - int rev; - - gpio_bank_count = 4; - gpio_bank = gpio_bank_242x; - rev = omap_readl(gpio_bank[0].base + OMAP24XX_GPIO_REVISION); - printk(KERN_INFO "OMAP242x GPIO hardware version %d.%d\n", - (rev >> 4) & 0x0f, rev & 0x0f); - } - if (cpu_is_omap243x()) { - int rev; - - gpio_bank_count = 5; - gpio_bank = gpio_bank_243x; - rev = omap_readl(gpio_bank[0].base + OMAP24XX_GPIO_REVISION); - printk(KERN_INFO "OMAP243x GPIO hardware version %d.%d\n", - (rev >> 4) & 0x0f, rev & 0x0f); - } -#endif -#ifdef CONFIG_ARCH_OMAP34XX - if (cpu_is_omap34xx()) { - int rev; - - gpio_bank_count = OMAP34XX_NR_GPIOS; - gpio_bank = gpio_bank_34xx; - rev = omap_readl(gpio_bank[0].base + OMAP24XX_GPIO_REVISION); - printk(KERN_INFO "OMAP34xx GPIO hardware version %d.%d\n", - (rev >> 4) & 0x0f, rev & 0x0f); - } -#endif - for (i = 0; i < gpio_bank_count; i++) { - int j, gpio_count = 16; - - bank = &gpio_bank[i]; - bank->reserved_map = 0; - bank->base = IO_ADDRESS(bank->base); - spin_lock_init(&bank->lock); - if (bank_is_mpuio(bank)) - omap_writew(0xFFFF, OMAP_MPUIO_BASE + OMAP_MPUIO_GPIO_MASKIT); - if (cpu_is_omap15xx() && bank->method == METHOD_GPIO_1510) { - __raw_writew(0xffff, bank->base + OMAP1510_GPIO_INT_MASK); - __raw_writew(0x0000, bank->base + OMAP1510_GPIO_INT_STATUS); - } - if (cpu_is_omap16xx() && bank->method == METHOD_GPIO_1610) { - __raw_writew(0x0000, bank->base + OMAP1610_GPIO_IRQENABLE1); - __raw_writew(0xffff, bank->base + OMAP1610_GPIO_IRQSTATUS1); - __raw_writew(0x0014, bank->base + OMAP1610_GPIO_SYSCONFIG); - } - if (cpu_is_omap730() && bank->method == METHOD_GPIO_730) { - __raw_writel(0xffffffff, bank->base + OMAP730_GPIO_INT_MASK); - __raw_writel(0x00000000, bank->base + OMAP730_GPIO_INT_STATUS); - - gpio_count = 32; /* 730 has 32-bit GPIOs */ - } - -#if defined(CONFIG_ARCH_OMAP24XX) || defined(CONFIG_ARCH_OMAP34XX) - if (bank->method == METHOD_GPIO_24XX) { - static const u32 non_wakeup_gpios[] = { - 0xe203ffc0, 0x08700040 - }; - - __raw_writel(0x00000000, bank->base + OMAP24XX_GPIO_IRQENABLE1); - __raw_writel(0xffffffff, bank->base + OMAP24XX_GPIO_IRQSTATUS1); - __raw_writew(0x0015, bank->base + OMAP24XX_GPIO_SYSCONFIG); - - /* Initialize interface clock ungated, module enabled */ - __raw_writel(0, bank->base + OMAP24XX_GPIO_CTRL); - if (i < ARRAY_SIZE(non_wakeup_gpios)) - bank->non_wakeup_gpios = non_wakeup_gpios[i]; - gpio_count = 32; - } -#endif - for (j = bank->virtual_irq_start; - j < bank->virtual_irq_start + gpio_count; j++) { - lockdep_set_class(&irq_desc[j].lock, &gpio_lock_class); - set_irq_chip_data(j, bank); - if (bank_is_mpuio(bank)) - set_irq_chip(j, &mpuio_irq_chip); - else - set_irq_chip(j, &gpio_irq_chip); - set_irq_handler(j, handle_simple_irq); - set_irq_flags(j, IRQF_VALID); - } - set_irq_chained_handler(bank->irq, gpio_irq_handler); - set_irq_data(bank->irq, bank); - } - - /* Enable system clock for GPIO module. - * The CAM_CLK_CTRL *is* really the right place. */ - if (cpu_is_omap16xx()) - omap_writel(omap_readl(ULPD_CAM_CLK_CTRL) | 0x04, ULPD_CAM_CLK_CTRL); - - /* Enable autoidle for the OCP interface */ - if (cpu_is_omap24xx()) - omap_writel(1 << 0, 0x48019010); - if (cpu_is_omap34xx()) - omap_writel(1 << 0, 0x48306814); - - return 0; -} - -#if defined(CONFIG_ARCH_OMAP16XX) || defined(CONFIG_ARCH_OMAP24XX) || defined(CONFIG_ARCH_OMAP34XX) -static int omap_gpio_suspend(struct sys_device *dev, pm_message_t mesg) -{ - int i; - - if (!cpu_class_is_omap2() && !cpu_is_omap16xx()) - return 0; - - for (i = 0; i < gpio_bank_count; i++) { - struct gpio_bank *bank = &gpio_bank[i]; - void __iomem *wake_status; - void __iomem *wake_clear; - void __iomem *wake_set; - unsigned long flags; - - switch (bank->method) { -#ifdef CONFIG_ARCH_OMAP16XX - case METHOD_GPIO_1610: - wake_status = bank->base + OMAP1610_GPIO_WAKEUPENABLE; - wake_clear = bank->base + OMAP1610_GPIO_CLEAR_WAKEUPENA; - wake_set = bank->base + OMAP1610_GPIO_SET_WAKEUPENA; - break; -#endif -#if defined(CONFIG_ARCH_OMAP24XX) || defined(CONFIG_ARCH_OMAP34XX) - case METHOD_GPIO_24XX: - wake_status = bank->base + OMAP24XX_GPIO_SETWKUENA; - wake_clear = bank->base + OMAP24XX_GPIO_CLEARWKUENA; - wake_set = bank->base + OMAP24XX_GPIO_SETWKUENA; - break; -#endif - default: - continue; - } - - spin_lock_irqsave(&bank->lock, flags); - bank->saved_wakeup = __raw_readl(wake_status); - __raw_writel(0xffffffff, wake_clear); - __raw_writel(bank->suspend_wakeup, wake_set); - spin_unlock_irqrestore(&bank->lock, flags); - } - - return 0; -} - -static int omap_gpio_resume(struct sys_device *dev) -{ - int i; - - if (!cpu_is_omap24xx() && !cpu_is_omap16xx()) - return 0; - - for (i = 0; i < gpio_bank_count; i++) { - struct gpio_bank *bank = &gpio_bank[i]; - void __iomem *wake_clear; - void __iomem *wake_set; - unsigned long flags; - - switch (bank->method) { -#ifdef CONFIG_ARCH_OMAP16XX - case METHOD_GPIO_1610: - wake_clear = bank->base + OMAP1610_GPIO_CLEAR_WAKEUPENA; - wake_set = bank->base + OMAP1610_GPIO_SET_WAKEUPENA; - break; -#endif -#if defined(CONFIG_ARCH_OMAP24XX) || defined(CONFIG_ARCH_OMAP34XX) - case METHOD_GPIO_24XX: - wake_clear = bank->base + OMAP24XX_GPIO_CLEARWKUENA; - wake_set = bank->base + OMAP24XX_GPIO_SETWKUENA; - break; -#endif - default: - continue; - } - - spin_lock_irqsave(&bank->lock, flags); - __raw_writel(0xffffffff, wake_clear); - __raw_writel(bank->saved_wakeup, wake_set); - spin_unlock_irqrestore(&bank->lock, flags); - } - - return 0; -} - -static struct sysdev_class omap_gpio_sysclass = { - .name = "gpio", - .suspend = omap_gpio_suspend, - .resume = omap_gpio_resume, -}; - -static struct sys_device omap_gpio_device = { - .id = 0, - .cls = &omap_gpio_sysclass, -}; - -#endif - -#if defined(CONFIG_ARCH_OMAP24XX) || defined(CONFIG_ARCH_OMAP34XX) - -static int workaround_enabled; - -void omap2_gpio_prepare_for_retention(void) -{ - int i, c = 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++) { - struct gpio_bank *bank = &gpio_bank[i]; - u32 l1, l2; - - 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 - 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 - c++; - } - if (!c) { - workaround_enabled = 0; - return; - } - workaround_enabled = 1; -} - -void omap2_gpio_resume_after_retention(void) -{ - int i; - - if (!workaround_enabled) - return; - for (i = 0; i < gpio_bank_count; i++) { - struct gpio_bank *bank = &gpio_bank[i]; - u32 l; - - if (!(bank->enabled_non_wakeup_gpios)) - continue; -#if defined(CONFIG_ARCH_OMAP24XX) || defined(CONFIG_ARCH_OMAP34XX) - __raw_writel(bank->saved_fallingdetect, - bank->base + OMAP24XX_GPIO_FALLINGDETECT); - __raw_writel(bank->saved_risingdetect, - bank->base + OMAP24XX_GPIO_RISINGDETECT); -#endif - /* 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. */ -#if defined(CONFIG_ARCH_OMAP24XX) || defined(CONFIG_ARCH_OMAP34XX) - l = __raw_readl(bank->base + OMAP24XX_GPIO_DATAIN); -#endif - l ^= bank->saved_datain; - l &= bank->non_wakeup_gpios; - if (l) { - 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 | l, bank->base + OMAP24XX_GPIO_LEVELDETECT0); - __raw_writel(old1 | l, bank->base + OMAP24XX_GPIO_LEVELDETECT1); - __raw_writel(old0, bank->base + OMAP24XX_GPIO_LEVELDETECT0); - __raw_writel(old1, bank->base + OMAP24XX_GPIO_LEVELDETECT1); -#endif - } - } - -} - -#endif - -/* - * This may get called early from board specific init - * for boards that have interrupts routed via FPGA. - */ -int __init omap_gpio_init(void) -{ - if (!initialized) - return _omap_gpio_init(); - else - return 0; -} - -static int __init omap_gpio_sysinit(void) -{ - int ret = 0; - - if (!initialized) - ret = _omap_gpio_init(); - - mpuio_init(); - -#if defined(CONFIG_ARCH_OMAP16XX) || defined(CONFIG_ARCH_OMAP24XX) || defined(CONFIG_ARCH_OMAP34XX) - if (cpu_is_omap16xx() || cpu_class_is_omap2()) { - if (ret == 0) { - ret = sysdev_class_register(&omap_gpio_sysclass); - if (ret == 0) - ret = sysdev_register(&omap_gpio_device); - } - } -#endif - - return ret; -} - -EXPORT_SYMBOL(omap_request_gpio); -EXPORT_SYMBOL(omap_free_gpio); -EXPORT_SYMBOL(omap_set_gpio_direction); -EXPORT_SYMBOL(omap_set_gpio_dataout); -EXPORT_SYMBOL(omap_get_gpio_datain); - -arch_initcall(omap_gpio_sysinit); - - -#ifdef CONFIG_DEBUG_FS - -#include <linux/debugfs.h> -#include <linux/seq_file.h> - -static int gpio_is_input(struct gpio_bank *bank, int mask) -{ - void __iomem *reg = bank->base; - - switch (bank->method) { - case METHOD_MPUIO: - reg += OMAP_MPUIO_IO_CNTL; - break; - case METHOD_GPIO_1510: - reg += OMAP1510_GPIO_DIR_CONTROL; - break; - case METHOD_GPIO_1610: - reg += OMAP1610_GPIO_DIRECTION; - break; - case METHOD_GPIO_730: - reg += OMAP730_GPIO_DIR_CONTROL; - break; - case METHOD_GPIO_24XX: - reg += OMAP24XX_GPIO_OE; - break; - } - return __raw_readl(reg) & mask; -} - - -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_omap730()) - bankwidth = 32; - - for (j = 0; j < bankwidth; j++, gpio++, mask <<= 1) { - unsigned irq, value, is_in, irqstat; - - if (!(bank->reserved_map & mask)) - continue; - - irq = bank->virtual_irq_start + j; - value = omap_get_gpio_datain(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, "%s %s", - is_in ? "in " : "out", - value ? "hi" : "lo"); - - irqstat = irq_desc[irq].status; - 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 = "(unspecified)"; - break; - } - seq_printf(s, ", irq-%d %s%s", - irq, trigger, - (bank->suspend_wakeup & mask) - ? " wakeup" : ""); - } - 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 |