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raspberrypi-kernel
提交 78a1a6d3 编写于 作者: S Syed Rafiuddin 提交者： Santosh Shilimkar
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ARM: OMAP4: Update the GPIO support 

This patch adds GPIO support on OMAP4430 development platform.
Signed-off-by: NSyed Rafiuddin <rafiuddin.syed@ti.com>
上级 085b54d9
隐藏空白更改
内联 并排
Showing with 198 addition and 51 deletion
arch/arm/plat-omap/gpio.c
浏览文件 @ 78a1a6d3
......@@ -138,6 +138,32 @@
#define OMAP24XX_GPIO_CLEARDATAOUT 0x0090
#define OMAP24XX_GPIO_SETDATAOUT 0x0094
#define OMAP4_GPIO_REVISION 0x0000
#define OMAP4_GPIO_SYSCONFIG 0x0010
#define OMAP4_GPIO_EOI 0x0020
#define OMAP4_GPIO_IRQSTATUSRAW0 0x0024
#define OMAP4_GPIO_IRQSTATUSRAW1 0x0028
#define OMAP4_GPIO_IRQSTATUS0 0x002c
#define OMAP4_GPIO_IRQSTATUS1 0x0030
#define OMAP4_GPIO_IRQSTATUSSET0 0x0034
#define OMAP4_GPIO_IRQSTATUSSET1 0x0038
#define OMAP4_GPIO_IRQSTATUSCLR0 0x003c
#define OMAP4_GPIO_IRQSTATUSCLR1 0x0040
#define OMAP4_GPIO_IRQWAKEN0 0x0044
#define OMAP4_GPIO_IRQWAKEN1 0x0048
#define OMAP4_GPIO_SYSSTATUS 0x0104
#define OMAP4_GPIO_CTRL 0x0130
#define OMAP4_GPIO_OE 0x0134
#define OMAP4_GPIO_DATAIN 0x0138
#define OMAP4_GPIO_DATAOUT 0x013c
#define OMAP4_GPIO_LEVELDETECT0 0x0140
#define OMAP4_GPIO_LEVELDETECT1 0x0144
#define OMAP4_GPIO_RISINGDETECT 0x0148
#define OMAP4_GPIO_FALLINGDETECT 0x014c
#define OMAP4_GPIO_DEBOUNCENABLE 0x0150
#define OMAP4_GPIO_DEBOUNCINGTIME 0x0154
#define OMAP4_GPIO_CLEARDATAOUT 0x0190
#define OMAP4_GPIO_SETDATAOUT 0x0194
/*
* omap34xx specific GPIO registers
*/
......@@ -386,11 +412,15 @@ 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) || \
defined(CONFIG_ARCH_OMAP4)
#if defined(CONFIG_ARCH_OMAP24XX) || defined(CONFIG_ARCH_OMAP34XX)
case METHOD_GPIO_24XX:
reg += OMAP24XX_GPIO_OE;
break;
#endif
#if defined(CONFIG_ARCH_OMAP4)
case METHOD_GPIO_24XX:
reg += OMAP4_GPIO_OE;
break;
#endif
default:
WARN_ON(1);
......@@ -459,8 +489,7 @@ 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) || \
defined(CONFIG_ARCH_OMAP4)
#if defined(CONFIG_ARCH_OMAP24XX) || defined(CONFIG_ARCH_OMAP34XX)
case METHOD_GPIO_24XX:
if (enable)
reg += OMAP24XX_GPIO_SETDATAOUT;
......@@ -468,6 +497,15 @@ static void _set_gpio_dataout(struct gpio_bank *bank, int gpio, int enable)
reg += OMAP24XX_GPIO_CLEARDATAOUT;
l = 1 << gpio;
break;
#endif
#ifdef CONFIG_ARCH_OMAP4
case METHOD_GPIO_24XX:
if (enable)
reg += OMAP4_GPIO_SETDATAOUT;
else
reg += OMAP4_GPIO_CLEARDATAOUT;
l = 1 << gpio;
break;
#endif
default:
WARN_ON(1);
......@@ -511,11 +549,15 @@ static int __omap_get_gpio_datain(int gpio)
reg += OMAP850_GPIO_DATA_INPUT;
break;
#endif
#if defined(CONFIG_ARCH_OMAP24XX) || defined(CONFIG_ARCH_OMAP34XX) || \
defined(CONFIG_ARCH_OMAP4)
#if defined(CONFIG_ARCH_OMAP24XX) || defined(CONFIG_ARCH_OMAP34XX)
case METHOD_GPIO_24XX:
reg += OMAP24XX_GPIO_DATAIN;
break;
#endif
#ifdef CONFIG_ARCH_OMAP4
case METHOD_GPIO_24XX:
reg += OMAP4_GPIO_DATAIN;
break;
#endif
default:
return -EINVAL;
......@@ -544,7 +586,11 @@ void omap_set_gpio_debounce(int gpio, int enable)
bank = get_gpio_bank(gpio);
reg = bank->base;
#ifdef CONFIG_ARCH_OMAP4
reg += OMAP4_GPIO_DEBOUNCENABLE;
#else
reg += OMAP24XX_GPIO_DEBOUNCE_EN;
#endif
spin_lock_irqsave(&bank->lock, flags);
val = __raw_readl(reg);
......@@ -581,7 +627,11 @@ void omap_set_gpio_debounce_time(int gpio, int enc_time)
reg = bank->base;
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);
......@@ -593,23 +643,46 @@ static inline void set_24xx_gpio_triggering(struct gpio_bank *bank, int gpio,
{
void __iomem *base = bank->base;
u32 gpio_bit = 1 << gpio;
u32 val;
MOD_REG_BIT(OMAP24XX_GPIO_LEVELDETECT0, gpio_bit,
trigger & IRQ_TYPE_LEVEL_LOW);
MOD_REG_BIT(OMAP24XX_GPIO_LEVELDETECT1, gpio_bit,
trigger & IRQ_TYPE_LEVEL_HIGH);
MOD_REG_BIT(OMAP24XX_GPIO_RISINGDETECT, gpio_bit,
trigger & IRQ_TYPE_EDGE_RISING);
MOD_REG_BIT(OMAP24XX_GPIO_FALLINGDETECT, gpio_bit,
trigger & IRQ_TYPE_EDGE_FALLING);
if (cpu_is_omap44xx()) {
MOD_REG_BIT(OMAP4_GPIO_LEVELDETECT0, gpio_bit,
trigger & IRQ_TYPE_LEVEL_LOW);
MOD_REG_BIT(OMAP4_GPIO_LEVELDETECT1, gpio_bit,
trigger & IRQ_TYPE_LEVEL_HIGH);
MOD_REG_BIT(OMAP4_GPIO_RISINGDETECT, gpio_bit,
trigger & IRQ_TYPE_EDGE_RISING);
MOD_REG_BIT(OMAP4_GPIO_FALLINGDETECT, gpio_bit,
trigger & IRQ_TYPE_EDGE_FALLING);
} else {
MOD_REG_BIT(OMAP24XX_GPIO_LEVELDETECT0, gpio_bit,
trigger & IRQ_TYPE_LEVEL_LOW);
MOD_REG_BIT(OMAP24XX_GPIO_LEVELDETECT1, gpio_bit,
trigger & IRQ_TYPE_LEVEL_HIGH);
MOD_REG_BIT(OMAP24XX_GPIO_RISINGDETECT, gpio_bit,
trigger & IRQ_TYPE_EDGE_RISING);
MOD_REG_BIT(OMAP24XX_GPIO_FALLINGDETECT, gpio_bit,
trigger & IRQ_TYPE_EDGE_FALLING);
}
if (likely(!(bank->non_wakeup_gpios & gpio_bit))) {
if (trigger != 0)
__raw_writel(1 << gpio, bank->base
if (cpu_is_omap44xx()) {
if (trigger != 0)
__raw_writel(1 << gpio, bank->base+
OMAP4_GPIO_IRQWAKEN0);
else {
val = __raw_readl(bank->base +
OMAP4_GPIO_IRQWAKEN0);
__raw_writel(val & (~(1 << gpio)), bank->base +
OMAP4_GPIO_IRQWAKEN0);
}
} else {
if (trigger != 0)
__raw_writel(1 << gpio, bank->base
+ OMAP24XX_GPIO_SETWKUENA);
else
__raw_writel(1 << gpio, bank->base
else
__raw_writel(1 << gpio, bank->base
+ OMAP24XX_GPIO_CLEARWKUENA);
}
} else {
if (trigger != 0)
bank->enabled_non_wakeup_gpios |= gpio_bit;
......@@ -617,9 +690,15 @@ static inline void set_24xx_gpio_triggering(struct gpio_bank *bank, int gpio,
bank->enabled_non_wakeup_gpios &= ~gpio_bit;
}
bank->level_mask =
__raw_readl(bank->base + OMAP24XX_GPIO_LEVELDETECT0) |
__raw_readl(bank->base + OMAP24XX_GPIO_LEVELDETECT1);
if (cpu_is_omap44xx()) {
bank->level_mask =
__raw_readl(bank->base + OMAP4_GPIO_LEVELDETECT0) |
__raw_readl(bank->base + OMAP4_GPIO_LEVELDETECT1);
} else {
bank->level_mask =
__raw_readl(bank->base + OMAP24XX_GPIO_LEVELDETECT0) |
__raw_readl(bank->base + OMAP24XX_GPIO_LEVELDETECT1);
}
}
#endif
......@@ -783,11 +862,15 @@ 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) || \
defined(CONFIG_ARCH_OMAP4)
#if defined(CONFIG_ARCH_OMAP24XX) || defined(CONFIG_ARCH_OMAP34XX)
case METHOD_GPIO_24XX:
reg += OMAP24XX_GPIO_IRQSTATUS1;
break;
#endif
#if defined(CONFIG_ARCH_OMAP4)
case METHOD_GPIO_24XX:
reg += OMAP4_GPIO_IRQSTATUS0;
break;
#endif
default:
WARN_ON(1);
......@@ -798,12 +881,16 @@ static void _clear_gpio_irqbank(struct gpio_bank *bank, int gpio_mask)
/* Workaround for clearing DSP GPIO interrupts to allow retention */
#if defined(CONFIG_ARCH_OMAP24XX) || defined(CONFIG_ARCH_OMAP34XX)
reg = bank->base + OMAP24XX_GPIO_IRQSTATUS2;
if (cpu_is_omap24xx() || cpu_is_omap34xx())
#endif
#if defined(CONFIG_ARCH_OMAP4)
reg = bank->base + OMAP4_GPIO_IRQSTATUS1;
#endif
if (cpu_is_omap24xx() || cpu_is_omap34xx() || cpu_is_omap44xx()) {
__raw_writel(gpio_mask, reg);
/* Flush posted write for the irq status to avoid spurious interrupts */
__raw_readl(reg);
#endif
}
}
static inline void _clear_gpio_irqstatus(struct gpio_bank *bank, int gpio)
......@@ -853,12 +940,17 @@ static u32 _get_gpio_irqbank_mask(struct gpio_bank *bank)
inv = 1;
break;
#endif
#if defined(CONFIG_ARCH_OMAP24XX) || defined(CONFIG_ARCH_OMAP34XX) || \
defined(CONFIG_ARCH_OMAP4)
#if defined(CONFIG_ARCH_OMAP24XX) || defined(CONFIG_ARCH_OMAP34XX)
case METHOD_GPIO_24XX:
reg += OMAP24XX_GPIO_IRQENABLE1;
mask = 0xffffffff;
break;
#endif
#if defined(CONFIG_ARCH_OMAP4)
case METHOD_GPIO_24XX:
reg += OMAP4_GPIO_IRQSTATUSSET0;
mask = 0xffffffff;
break;
#endif
default:
WARN_ON(1);
......@@ -927,8 +1019,7 @@ 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) || \
defined(CONFIG_ARCH_OMAP4)
#if defined(CONFIG_ARCH_OMAP24XX) || defined(CONFIG_ARCH_OMAP34XX)
case METHOD_GPIO_24XX:
if (enable)
reg += OMAP24XX_GPIO_SETIRQENABLE1;
......@@ -936,6 +1027,15 @@ static void _enable_gpio_irqbank(struct gpio_bank *bank, int gpio_mask, int enab
reg += OMAP24XX_GPIO_CLEARIRQENABLE1;
l = gpio_mask;
break;
#endif
#ifdef CONFIG_ARCH_OMAP4
case METHOD_GPIO_24XX:
if (enable)
reg += OMAP4_GPIO_IRQSTATUSSET0;
else
reg += OMAP4_GPIO_IRQSTATUSCLR0;
l = gpio_mask;
break;
#endif
default:
WARN_ON(1);
......@@ -1112,10 +1212,13 @@ 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) || \
defined(CONFIG_ARCH_OMAP4)
#if defined(CONFIG_ARCH_OMAP24XX) || defined(CONFIG_ARCH_OMAP34XX)
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)
isr_reg = bank->base + OMAP4_GPIO_IRQSTATUS0;
#endif
while(1) {
u32 isr_saved, level_mask = 0;
......@@ -1547,7 +1650,7 @@ static int __init _omap_gpio_init(void)
gpio_bank_count = OMAP34XX_NR_GPIOS;
gpio_bank = gpio_bank_44xx;
rev = __raw_readl(gpio_bank[0].base + OMAP24XX_GPIO_REVISION);
rev = __raw_readl(gpio_bank[0].base + OMAP4_GPIO_REVISION);
printk(KERN_INFO "OMAP44xx GPIO hardware version %d.%d\n",
(rev >> 4) & 0x0f, rev & 0x0f);
}
......@@ -1581,7 +1684,16 @@ static int __init _omap_gpio_init(void)
static const u32 non_wakeup_gpios[] = {
0xe203ffc0, 0x08700040
};
if (cpu_is_omap44xx()) {
__raw_writel(0xffffffff, bank->base +
OMAP4_GPIO_IRQSTATUSCLR0);
__raw_writew(0x0015, bank->base +
OMAP4_GPIO_SYSCONFIG);
__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);
......@@ -1589,12 +1701,12 @@ static int __init _omap_gpio_init(void)
/* 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
/* REVISIT eventually switch from OMAP-specific gpio structs
* over to the generic ones
*/
......@@ -1680,13 +1792,19 @@ 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) || \
defined(CONFIG_ARCH_OMAP4)
#if defined(CONFIG_ARCH_OMAP24XX) || defined(CONFIG_ARCH_OMAP34XX)
case METHOD_GPIO_24XX:
wake_status = bank->base + OMAP24XX_GPIO_WAKE_EN;
wake_clear = bank->base + OMAP24XX_GPIO_CLEARWKUENA;
wake_set = bank->base + OMAP24XX_GPIO_SETWKUENA;
break;
#endif
#ifdef CONFIG_ARCH_OMAP4
case METHOD_GPIO_24XX:
wake_status = bank->base + OMAP4_GPIO_IRQWAKEN0;
wake_clear = bank->base + OMAP4_GPIO_IRQWAKEN0;
wake_set = bank->base + OMAP4_GPIO_IRQWAKEN0;
break;
#endif
default:
continue;
......@@ -1722,12 +1840,17 @@ 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) || \
defined(CONFIG_ARCH_OMAP4)
#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
#ifdef CONFIG_ARCH_OMAP4
case METHOD_GPIO_24XX:
wake_clear = bank->base + OMAP4_GPIO_IRQWAKEN0;
wake_set = bank->base + OMAP4_GPIO_IRQWAKEN0;
break;
#endif
default:
continue;
......@@ -1772,20 +1895,28 @@ void omap2_gpio_prepare_for_retention(void)
if (!(bank->enabled_non_wakeup_gpios))
continue;
#if defined(CONFIG_ARCH_OMAP24XX) || defined(CONFIG_ARCH_OMAP34XX) || \
defined(CONFIG_ARCH_OMAP4)
#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
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) || \
defined(CONFIG_ARCH_OMAP4)
#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
c++;
}
......@@ -1808,33 +1939,49 @@ void omap2_gpio_resume_after_retention(void)
if (!(bank->enabled_non_wakeup_gpios))
continue;
#if defined(CONFIG_ARCH_OMAP24XX) || defined(CONFIG_ARCH_OMAP34XX) || \
defined(CONFIG_ARCH_OMAP4)
#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);
l = __raw_readl(bank->base + OMAP24XX_GPIO_DATAIN);
#endif
#ifdef CONFIG_ARCH_OMAP4
__raw_writel(bank->saved_fallingdetect,
bank->base + OMAP4_GPIO_FALLINGDETECT);
__raw_writel(bank->saved_risingdetect,
bank->base + OMAP4_GPIO_RISINGDETECT);
l = __raw_readl(bank->base + OMAP4_GPIO_DATAIN);
#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) || \
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) || \
defined(CONFIG_ARCH_OMAP4)
#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
#ifdef CONFIG_ARCH_OMAP4
old0 = __raw_readl(bank->base +
OMAP4_GPIO_LEVELDETECT0);
old1 = __raw_readl(bank->base +
OMAP4_GPIO_LEVELDETECT1);
__raw_writel(old0 | l, bank->base +
OMAP4_GPIO_LEVELDETECT0);
__raw_writel(old1 | l, bank->base +
OMAP4_GPIO_LEVELDETECT1);
__raw_writel(old0, bank->base +
OMAP4_GPIO_LEVELDETECT0);
__raw_writel(old1, bank->base +
OMAP4_GPIO_LEVELDETECT1);
#endif
}
}
......
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