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Diffstat (limited to 'arch/arm/plat-omap/gpio.c')
-rw-r--r--arch/arm/plat-omap/gpio.c236
1 files changed, 94 insertions, 142 deletions
diff --git a/arch/arm/plat-omap/gpio.c b/arch/arm/plat-omap/gpio.c
index 45a225d09125..dc2ac42d6319 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
/*
@@ -195,6 +204,7 @@ struct gpio_bank {
struct gpio_chip chip;
struct clk *dbck;
u32 mod_usage;
+ u32 dbck_enable_mask;
};
#define METHOD_MPUIO 0
@@ -303,8 +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];
@@ -591,12 +599,16 @@ static int _get_gpio_dataout(struct gpio_bank *bank, int gpio)
reg += OMAP7XX_GPIO_DATA_OUTPUT;
break;
#endif
-#ifdef CONFIG_ARCH_OMAP2PLUS
+#if defined(CONFIG_ARCH_OMAP2) || defined(CONFIG_ARCH_OMAP3)
case METHOD_GPIO_24XX:
- case METHOD_GPIO_44XX:
reg += OMAP24XX_GPIO_DATAOUT;
break;
#endif
+#ifdef CONFIG_ARCH_OMAP4
+ case METHOD_GPIO_44XX:
+ reg += OMAP4_GPIO_DATAOUT;
+ break;
+#endif
default:
return -EINVAL;
}
@@ -646,6 +658,7 @@ void omap_set_gpio_debounce(int gpio, int enable)
goto done;
if (cpu_is_omap34xx() || cpu_is_omap44xx()) {
+ bank->dbck_enable_mask = val;
if (enable)
clk_enable(bank->dbck);
else
@@ -724,15 +737,27 @@ 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;
@@ -1200,11 +1225,17 @@ 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;
}
@@ -1226,22 +1257,34 @@ static void omap_gpio_free(struct gpio_chip *chip, unsigned offset)
__raw_writel(1 << offset, reg);
}
#endif
-#ifdef CONFIG_ARCH_OMAP2PLUS
- if ((bank->method == METHOD_GPIO_24XX) ||
- (bank->method == METHOD_GPIO_44XX)) {
+#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);
@@ -1570,9 +1613,14 @@ static int gpio_is_input(struct gpio_bank *bank, int mask)
reg += OMAP7XX_GPIO_DIR_CONTROL;
break;
case METHOD_GPIO_24XX:
- case METHOD_GPIO_44XX:
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;
}
@@ -1845,7 +1893,8 @@ static int __init _omap_gpio_init(void)
__raw_writel(0, bank->base +
OMAP24XX_GPIO_CTRL);
}
- if (i < ARRAY_SIZE(non_wakeup_gpios))
+ if (cpu_is_omap24xx() &&
+ i < ARRAY_SIZE(non_wakeup_gpios))
bank->non_wakeup_gpios = non_wakeup_gpios[i];
gpio_count = 32;
}
@@ -2028,16 +2077,27 @@ static struct sys_device omap_gpio_device = {
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;
@@ -2085,16 +2145,23 @@ 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;
@@ -2119,7 +2186,7 @@ void omap2_gpio_resume_after_retention(void)
* 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
@@ -2207,10 +2274,6 @@ 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);
}
}
@@ -2243,10 +2306,6 @@ 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
@@ -2286,110 +2345,3 @@ 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_OMAP2PLUS)
- 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