Merge branch 'for-2.6.31' of git://git.kernel.org/pub/scm/linux/kernel/git/broonie...

[mv-sheeva.git] / arch / arm / plat-omap / gpio.c

diff --git a/arch/arm/plat-omap/gpio.c b/arch/arm/plat-omap/gpio.c
index ee0b21f5b094f64e70e95caffb7eda66b6c8d930..7fd89ba8d3b5939684ab6999a12fc19c5430b31e 100644 (file)
--- a/arch/arm/plat-omap/gpio.c
+++ b/arch/arm/plat-omap/gpio.c
@@ -6,6 +6,9 @@
  * Copyright (C) 2003-2005 Nokia Corporation
  * Written by Juha Yrjölä <juha.yrjola@nokia.com>
  *
+ * Copyright (C) 2009 Texas Instruments
+ * Added OMAP4 support - Santosh Shilimkar <santosh.shilimkar@ti.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.
@@ -146,6 +149,16 @@
 #define OMAP34XX_GPIO5_BASE            IO_ADDRESS(0x49056000)
 #define OMAP34XX_GPIO6_BASE            IO_ADDRESS(0x49058000)
 
+/*
+ * OMAP44XX  specific GPIO registers
+ */
+#define OMAP44XX_GPIO1_BASE             IO_ADDRESS(0x4a310000)
+#define OMAP44XX_GPIO2_BASE             IO_ADDRESS(0x48055000)
+#define OMAP44XX_GPIO3_BASE             IO_ADDRESS(0x48057000)
+#define OMAP44XX_GPIO4_BASE             IO_ADDRESS(0x48059000)
+#define OMAP44XX_GPIO5_BASE             IO_ADDRESS(0x4805B000)
+#define OMAP44XX_GPIO6_BASE             IO_ADDRESS(0x4805D000)
+
 #define OMAP_MPUIO_VBASE               IO_ADDRESS(OMAP_MPUIO_BASE)
 
 struct gpio_bank {
@@ -153,11 +166,13 @@ struct gpio_bank {
        u16 irq;
        u16 virtual_irq_start;
        int method;
-#if defined(CONFIG_ARCH_OMAP16XX) || defined(CONFIG_ARCH_OMAP24XX) || defined(CONFIG_ARCH_OMAP34XX)
+#if defined(CONFIG_ARCH_OMAP16XX) || defined(CONFIG_ARCH_OMAP24XX) ||  \
+               defined(CONFIG_ARCH_OMAP34XX) || defined(CONFIG_ARCH_OMAP4)
        u32 suspend_wakeup;
        u32 saved_wakeup;
 #endif
-#if defined(CONFIG_ARCH_OMAP24XX) || defined(CONFIG_ARCH_OMAP34XX)
+#if defined(CONFIG_ARCH_OMAP24XX) || defined(CONFIG_ARCH_OMAP34XX) || \
+                       defined(CONFIG_ARCH_OMAP4)
        u32 non_wakeup_gpios;
        u32 enabled_non_wakeup_gpios;
 
@@ -251,6 +266,24 @@ static struct gpio_bank gpio_bank_34xx[6] = {
 
 #endif
 
+#ifdef CONFIG_ARCH_OMAP4
+static struct gpio_bank gpio_bank_44xx[6] = {
+       { OMAP44XX_GPIO1_BASE, INT_44XX_GPIO_BANK1, IH_GPIO_BASE,       \
+               METHOD_GPIO_24XX },
+       { OMAP44XX_GPIO2_BASE, INT_44XX_GPIO_BANK2, IH_GPIO_BASE + 32,  \
+               METHOD_GPIO_24XX },
+       { OMAP44XX_GPIO3_BASE, INT_44XX_GPIO_BANK3, IH_GPIO_BASE + 64,  \
+               METHOD_GPIO_24XX },
+       { OMAP44XX_GPIO4_BASE, INT_44XX_GPIO_BANK4, IH_GPIO_BASE + 96,  \
+               METHOD_GPIO_24XX },
+       { OMAP44XX_GPIO5_BASE, INT_44XX_GPIO_BANK5, IH_GPIO_BASE + 128, \
+               METHOD_GPIO_24XX },
+       { OMAP44XX_GPIO6_BASE, INT_44XX_GPIO_BANK6, IH_GPIO_BASE + 160, \
+               METHOD_GPIO_24XX },
+};
+
+#endif
+
 static struct gpio_bank *gpio_bank;
 static int gpio_bank_count;
 
@@ -273,7 +306,7 @@ static inline struct gpio_bank *get_gpio_bank(int gpio)
        }
        if (cpu_is_omap24xx())
                return &gpio_bank[gpio >> 5];
-       if (cpu_is_omap34xx())
+       if (cpu_is_omap34xx() || cpu_is_omap44xx())
                return &gpio_bank[gpio >> 5];
        BUG();
        return NULL;
@@ -285,7 +318,7 @@ static inline int get_gpio_index(int gpio)
                return gpio & 0x1f;
        if (cpu_is_omap24xx())
                return gpio & 0x1f;
-       if (cpu_is_omap34xx())
+       if (cpu_is_omap34xx() || cpu_is_omap44xx())
                return gpio & 0x1f;
        return gpio & 0x0f;
 }
@@ -307,7 +340,7 @@ static inline int gpio_valid(int gpio)
                return 0;
        if (cpu_is_omap24xx() && gpio < 128)
                return 0;
-       if (cpu_is_omap34xx() && gpio < 192)
+       if ((cpu_is_omap34xx() || cpu_is_omap44xx()) && gpio < 192)
                return 0;
        return -1;
 }
@@ -353,7 +386,8 @@ static void _set_gpio_direction(struct gpio_bank *bank, int gpio, int is_input)
                reg += OMAP850_GPIO_DIR_CONTROL;
                break;
 #endif
-#if defined(CONFIG_ARCH_OMAP24XX) || defined(CONFIG_ARCH_OMAP34XX)
+#if defined(CONFIG_ARCH_OMAP24XX) || defined(CONFIG_ARCH_OMAP34XX) || \
+                       defined(CONFIG_ARCH_OMAP4)
        case METHOD_GPIO_24XX:
                reg += OMAP24XX_GPIO_OE;
                break;
@@ -425,7 +459,8 @@ 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_OMAP24XX) || defined(CONFIG_ARCH_OMAP34XX) || \
+                       defined(CONFIG_ARCH_OMAP4)
        case METHOD_GPIO_24XX:
                if (enable)
                        reg += OMAP24XX_GPIO_SETDATAOUT;
@@ -476,7 +511,8 @@ static int __omap_get_gpio_datain(int gpio)
                reg += OMAP850_GPIO_DATA_INPUT;
                break;
 #endif
-#if defined(CONFIG_ARCH_OMAP24XX) || defined(CONFIG_ARCH_OMAP34XX)
+#if defined(CONFIG_ARCH_OMAP24XX) || defined(CONFIG_ARCH_OMAP34XX) || \
+                       defined(CONFIG_ARCH_OMAP4)
        case METHOD_GPIO_24XX:
                reg += OMAP24XX_GPIO_DATAIN;
                break;
@@ -520,7 +556,7 @@ void omap_set_gpio_debounce(int gpio, int enable)
        else
                goto done;
 
-       if (cpu_is_omap34xx()) {
+       if (cpu_is_omap34xx() || cpu_is_omap44xx()) {
                if (enable)
                        clk_enable(bank->dbck);
                else
@@ -550,7 +586,8 @@ void omap_set_gpio_debounce_time(int gpio, int enc_time)
 }
 EXPORT_SYMBOL(omap_set_gpio_debounce_time);
 
-#if defined(CONFIG_ARCH_OMAP24XX) || defined(CONFIG_ARCH_OMAP34XX)
+#if defined(CONFIG_ARCH_OMAP24XX) || defined(CONFIG_ARCH_OMAP34XX) || \
+                               defined(CONFIG_ARCH_OMAP4)
 static inline void set_24xx_gpio_triggering(struct gpio_bank *bank, int gpio,
                                                int trigger)
 {
@@ -660,7 +697,8 @@ 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)
+#if defined(CONFIG_ARCH_OMAP24XX) || defined(CONFIG_ARCH_OMAP34XX) || \
+                               defined(CONFIG_ARCH_OMAP4)
        case METHOD_GPIO_24XX:
                set_24xx_gpio_triggering(bank, gpio, trigger);
                break;
@@ -745,7 +783,8 @@ static void _clear_gpio_irqbank(struct gpio_bank *bank, int gpio_mask)
                reg += OMAP850_GPIO_INT_STATUS;
                break;
 #endif
-#if defined(CONFIG_ARCH_OMAP24XX) || defined(CONFIG_ARCH_OMAP34XX)
+#if defined(CONFIG_ARCH_OMAP24XX) || defined(CONFIG_ARCH_OMAP34XX) || \
+                               defined(CONFIG_ARCH_OMAP4)
        case METHOD_GPIO_24XX:
                reg += OMAP24XX_GPIO_IRQSTATUS1;
                break;
@@ -814,7 +853,8 @@ 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_OMAP24XX) || defined(CONFIG_ARCH_OMAP34XX) || \
+                               defined(CONFIG_ARCH_OMAP4)
        case METHOD_GPIO_24XX:
                reg += OMAP24XX_GPIO_IRQENABLE1;
                mask = 0xffffffff;
@@ -887,7 +927,8 @@ 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_OMAP24XX) || defined(CONFIG_ARCH_OMAP34XX) || \
+               defined(CONFIG_ARCH_OMAP4)
        case METHOD_GPIO_24XX:
                if (enable)
                        reg += OMAP24XX_GPIO_SETIRQENABLE1;
@@ -932,7 +973,8 @@ 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)
+#if defined(CONFIG_ARCH_OMAP24XX) || defined(CONFIG_ARCH_OMAP34XX) || \
+                               defined(CONFIG_ARCH_OMAP4)
        case METHOD_GPIO_24XX:
                if (bank->non_wakeup_gpios & (1 << gpio)) {
                        printk(KERN_ERR "Unable to modify wakeup on "
@@ -1017,7 +1059,8 @@ 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)
+#if defined(CONFIG_ARCH_OMAP24XX) || defined(CONFIG_ARCH_OMAP34XX) || \
+                               defined(CONFIG_ARCH_OMAP4)
        if (bank->method == METHOD_GPIO_24XX) {
                /* Disable wake-up during idle for dynamic tick */
                void __iomem *reg = bank->base + OMAP24XX_GPIO_CLEARWKUENA;
@@ -1069,7 +1112,8 @@ static void gpio_irq_handler(unsigned int irq, struct irq_desc *desc)
        if (bank->method == METHOD_GPIO_850)
                isr_reg = bank->base + OMAP850_GPIO_INT_STATUS;
 #endif
-#if defined(CONFIG_ARCH_OMAP24XX) || defined(CONFIG_ARCH_OMAP34XX)
+#if defined(CONFIG_ARCH_OMAP24XX) || defined(CONFIG_ARCH_OMAP34XX) || \
+                               defined(CONFIG_ARCH_OMAP4)
        if (bank->method == METHOD_GPIO_24XX)
                isr_reg = bank->base + OMAP24XX_GPIO_IRQSTATUS1;
 #endif
@@ -1346,7 +1390,7 @@ static int gpio_2irq(struct gpio_chip *chip, unsigned offset)
 /*---------------------------------------------------------------------*/
 
 static int initialized;
-#if !defined(CONFIG_ARCH_OMAP3)
+#if !(defined(CONFIG_ARCH_OMAP3) || defined(CONFIG_ARCH_OMAP4))
 static struct clk * gpio_ick;
 #endif
 
@@ -1359,7 +1403,7 @@ static struct clk * gpio5_ick;
 static struct clk * gpio5_fck;
 #endif
 
-#if defined(CONFIG_ARCH_OMAP3)
+#if defined(CONFIG_ARCH_OMAP3) || defined(CONFIG_ARCH_OMAP4)
 static struct clk *gpio_iclks[OMAP34XX_NR_GPIOS];
 #endif
 
@@ -1419,8 +1463,8 @@ static int __init _omap_gpio_init(void)
        }
 #endif
 
-#if defined(CONFIG_ARCH_OMAP3)
-       if (cpu_is_omap34xx()) {
+#if defined(CONFIG_ARCH_OMAP3) || defined(CONFIG_ARCH_OMAP4)
+       if (cpu_is_omap34xx() || cpu_is_omap44xx()) {
                for (i = 0; i < OMAP34XX_NR_GPIOS; i++) {
                        sprintf(clk_name, "gpio%d_ick", i + 1);
                        gpio_iclks[i] = clk_get(NULL, clk_name);
@@ -1496,6 +1540,17 @@ static int __init _omap_gpio_init(void)
                printk(KERN_INFO "OMAP34xx GPIO hardware version %d.%d\n",
                        (rev >> 4) & 0x0f, rev & 0x0f);
        }
+#endif
+#ifdef CONFIG_ARCH_OMAP4
+       if (cpu_is_omap44xx()) {
+               int rev;
+
+               gpio_bank_count = OMAP34XX_NR_GPIOS;
+               gpio_bank = gpio_bank_44xx;
+               rev = __raw_readl(gpio_bank[0].base + OMAP24XX_GPIO_REVISION);
+               printk(KERN_INFO "OMAP44xx 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;
@@ -1520,7 +1575,8 @@ static int __init _omap_gpio_init(void)
                        gpio_count = 32; /* 730 has 32-bit GPIOs */
                }
 
-#if defined(CONFIG_ARCH_OMAP24XX) || defined(CONFIG_ARCH_OMAP34XX)
+#if defined(CONFIG_ARCH_OMAP24XX) || defined(CONFIG_ARCH_OMAP34XX) || \
+                               defined(CONFIG_ARCH_OMAP4)
                if (bank->method == METHOD_GPIO_24XX) {
                        static const u32 non_wakeup_gpios[] = {
                                0xe203ffc0, 0x08700040
@@ -1577,7 +1633,7 @@ static int __init _omap_gpio_init(void)
                set_irq_chained_handler(bank->irq, gpio_irq_handler);
                set_irq_data(bank->irq, bank);
 
-               if (cpu_is_omap34xx()) {
+               if (cpu_is_omap34xx() || cpu_is_omap44xx()) {
                        sprintf(clk_name, "gpio%d_dbck", i + 1);
                        bank->dbck = clk_get(NULL, clk_name);
                        if (IS_ERR(bank->dbck))
@@ -1599,7 +1655,8 @@ static int __init _omap_gpio_init(void)
        return 0;
 }
 
-#if defined(CONFIG_ARCH_OMAP16XX) || defined(CONFIG_ARCH_OMAP24XX) || defined(CONFIG_ARCH_OMAP34XX)
+#if defined(CONFIG_ARCH_OMAP16XX) || defined(CONFIG_ARCH_OMAP24XX) || \
+               defined(CONFIG_ARCH_OMAP34XX) || defined(CONFIG_ARCH_OMAP4)
 static int omap_gpio_suspend(struct sys_device *dev, pm_message_t mesg)
 {
        int i;
@@ -1622,7 +1679,8 @@ 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_OMAP24XX) || defined(CONFIG_ARCH_OMAP34XX) || \
+                               defined(CONFIG_ARCH_OMAP4)
                case METHOD_GPIO_24XX:
                        wake_status = bank->base + OMAP24XX_GPIO_WAKE_EN;
                        wake_clear = bank->base + OMAP24XX_GPIO_CLEARWKUENA;
@@ -1663,7 +1721,8 @@ 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_OMAP24XX) || defined(CONFIG_ARCH_OMAP34XX) || \
+                       defined(CONFIG_ARCH_OMAP4)
                case METHOD_GPIO_24XX:
                        wake_clear = bank->base + OMAP24XX_GPIO_CLEARWKUENA;
                        wake_set = bank->base + OMAP24XX_GPIO_SETWKUENA;
@@ -1695,7 +1754,8 @@ static struct sys_device omap_gpio_device = {
 
 #endif
 
-#if defined(CONFIG_ARCH_OMAP24XX) || defined(CONFIG_ARCH_OMAP34XX)
+#if defined(CONFIG_ARCH_OMAP24XX) || defined(CONFIG_ARCH_OMAP34XX) || \
+                               defined(CONFIG_ARCH_OMAP4)
 
 static int workaround_enabled;
 
@@ -1711,7 +1771,8 @@ void omap2_gpio_prepare_for_retention(void)
 
                if (!(bank->enabled_non_wakeup_gpios))
                        continue;
-#if defined(CONFIG_ARCH_OMAP24XX) || defined(CONFIG_ARCH_OMAP34XX)
+#if defined(CONFIG_ARCH_OMAP24XX) || defined(CONFIG_ARCH_OMAP34XX) || \
+                               defined(CONFIG_ARCH_OMAP4)
                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);
@@ -1720,7 +1781,8 @@ void omap2_gpio_prepare_for_retention(void)
                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)
+#if defined(CONFIG_ARCH_OMAP24XX) || defined(CONFIG_ARCH_OMAP34XX) || \
+                       defined(CONFIG_ARCH_OMAP4)
                __raw_writel(l1, bank->base + OMAP24XX_GPIO_FALLINGDETECT);
                __raw_writel(l2, bank->base + OMAP24XX_GPIO_RISINGDETECT);
 #endif
@@ -1745,7 +1807,8 @@ void omap2_gpio_resume_after_retention(void)
 
                if (!(bank->enabled_non_wakeup_gpios))
                        continue;
-#if defined(CONFIG_ARCH_OMAP24XX) || defined(CONFIG_ARCH_OMAP34XX)
+#if defined(CONFIG_ARCH_OMAP24XX) || defined(CONFIG_ARCH_OMAP34XX) || \
+                       defined(CONFIG_ARCH_OMAP4)
                __raw_writel(bank->saved_fallingdetect,
                                 bank->base + OMAP24XX_GPIO_FALLINGDETECT);
                __raw_writel(bank->saved_risingdetect,
@@ -1755,14 +1818,16 @@ void omap2_gpio_resume_after_retention(void)
                 * 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)
+#if defined(CONFIG_ARCH_OMAP24XX) || defined(CONFIG_ARCH_OMAP34XX) || \
+                       defined(CONFIG_ARCH_OMAP4)
                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)
+#if defined(CONFIG_ARCH_OMAP24XX) || defined(CONFIG_ARCH_OMAP34XX) || \
+                       defined(CONFIG_ARCH_OMAP4)
                        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);
@@ -1798,7 +1863,8 @@ static int __init omap_gpio_sysinit(void)
 
        mpuio_init();
 
-#if defined(CONFIG_ARCH_OMAP16XX) || defined(CONFIG_ARCH_OMAP24XX) || defined(CONFIG_ARCH_OMAP34XX)
+#if defined(CONFIG_ARCH_OMAP16XX) || defined(CONFIG_ARCH_OMAP24XX) || \
+               defined(CONFIG_ARCH_OMAP34XX) || defined(CONFIG_ARCH_OMAP4)
        if (cpu_is_omap16xx() || cpu_class_is_omap2()) {
                if (ret == 0) {
                        ret = sysdev_class_register(&omap_gpio_sysclass);
@@ -1887,7 +1953,7 @@ static int dbg_gpio_show(struct seq_file *s, void *unused)
 
                        irqstat = irq_desc[irq].status;
 #if defined(CONFIG_ARCH_OMAP16XX) || defined(CONFIG_ARCH_OMAP24XX) ||  \
-               defined(CONFIG_ARCH_OMAP34XX)
+               defined(CONFIG_ARCH_OMAP34XX) || defined(CONFIG_ARCH_OMAP4)
                        if (is_in && ((bank->suspend_wakeup & mask)
                                        || irqstat & IRQ_TYPE_SENSE_MASK)) {
                                char    *trigger = NULL;