diff options
Diffstat (limited to 'arch/arm/mach-ep93xx/core.c')
| -rw-r--r-- | arch/arm/mach-ep93xx/core.c | 109 |
1 files changed, 12 insertions, 97 deletions
diff --git a/arch/arm/mach-ep93xx/core.c b/arch/arm/mach-ep93xx/core.c index 91f6a07..8bc1872 100644 --- a/arch/arm/mach-ep93xx/core.c +++ b/arch/arm/mach-ep93xx/core.c @@ -159,7 +159,7 @@ static const u8 int_type2_register_offset[3] = { 0x94, 0xb0, 0x50 }; static const u8 eoi_register_offset[3] = { 0x98, 0xb4, 0x54 }; static const u8 int_en_register_offset[3] = { 0x9c, 0xb8, 0x5c }; -static void update_gpio_int_params(unsigned port) +void ep93xx_gpio_update_int_params(unsigned port) { BUG_ON(port > 2); @@ -175,98 +175,10 @@ static void update_gpio_int_params(unsigned port) EP93XX_GPIO_REG(int_en_register_offset[port])); } -/* Port ordering is: A B F D E C G H */ -static const u8 data_register_offset[8] = { - 0x00, 0x04, 0x30, 0x0c, 0x20, 0x08, 0x38, 0x40, -}; - -static const u8 data_direction_register_offset[8] = { - 0x10, 0x14, 0x34, 0x1c, 0x24, 0x18, 0x3c, 0x44, -}; - -#define GPIO_IN 0 -#define GPIO_OUT 1 - -static void ep93xx_gpio_set_direction(unsigned line, int direction) -{ - unsigned int data_direction_register; - unsigned long flags; - unsigned char v; - - data_direction_register = - EP93XX_GPIO_REG(data_direction_register_offset[line >> 3]); - - local_irq_save(flags); - if (direction == GPIO_OUT) { - if (line >= 0 && line <= EP93XX_GPIO_LINE_MAX_IRQ) { - /* Port A/B/F */ - gpio_int_unmasked[line >> 3] &= ~(1 << (line & 7)); - update_gpio_int_params(line >> 3); - } - - v = __raw_readb(data_direction_register); - v |= 1 << (line & 7); - __raw_writeb(v, data_direction_register); - } else if (direction == GPIO_IN) { - v = __raw_readb(data_direction_register); - v &= ~(1 << (line & 7)); - __raw_writeb(v, data_direction_register); - } - local_irq_restore(flags); -} - -int gpio_direction_input(unsigned gpio) -{ - if (gpio > EP93XX_GPIO_LINE_MAX) - return -EINVAL; - - ep93xx_gpio_set_direction(gpio, GPIO_IN); - - return 0; -} -EXPORT_SYMBOL(gpio_direction_input); - -int gpio_direction_output(unsigned gpio, int value) -{ - if (gpio > EP93XX_GPIO_LINE_MAX) - return -EINVAL; - - gpio_set_value(gpio, value); - ep93xx_gpio_set_direction(gpio, GPIO_OUT); - - return 0; -} -EXPORT_SYMBOL(gpio_direction_output); - -int gpio_get_value(unsigned gpio) -{ - unsigned int data_register; - - data_register = EP93XX_GPIO_REG(data_register_offset[gpio >> 3]); - - return !!(__raw_readb(data_register) & (1 << (gpio & 7))); -} -EXPORT_SYMBOL(gpio_get_value); - -void gpio_set_value(unsigned gpio, int value) +void ep93xx_gpio_int_mask(unsigned line) { - unsigned int data_register; - unsigned long flags; - unsigned char v; - - data_register = EP93XX_GPIO_REG(data_register_offset[gpio >> 3]); - - local_irq_save(flags); - v = __raw_readb(data_register); - if (value) - v |= 1 << (gpio & 7); - else - v &= ~(1 << (gpio & 7)); - __raw_writeb(v, data_register); - local_irq_restore(flags); + gpio_int_unmasked[line >> 3] &= ~(1 << (line & 7)); } -EXPORT_SYMBOL(gpio_set_value); - /************************************************************************* * EP93xx IRQ handling @@ -316,7 +228,7 @@ static void ep93xx_gpio_irq_ack(unsigned int irq) if ((irq_desc[irq].status & IRQ_TYPE_SENSE_MASK) == IRQT_BOTHEDGE) { gpio_int_type2[port] ^= port_mask; /* switch edge direction */ - update_gpio_int_params(port); + ep93xx_gpio_update_int_params(port); } __raw_writeb(port_mask, EP93XX_GPIO_REG(eoi_register_offset[port])); @@ -332,7 +244,7 @@ static void ep93xx_gpio_irq_mask_ack(unsigned int irq) gpio_int_type2[port] ^= port_mask; /* switch edge direction */ gpio_int_unmasked[port] &= ~port_mask; - update_gpio_int_params(port); + ep93xx_gpio_update_int_params(port); __raw_writeb(port_mask, EP93XX_GPIO_REG(eoi_register_offset[port])); } @@ -343,7 +255,7 @@ static void ep93xx_gpio_irq_mask(unsigned int irq) int port = line >> 3; gpio_int_unmasked[port] &= ~(1 << (line & 7)); - update_gpio_int_params(port); + ep93xx_gpio_update_int_params(port); } static void ep93xx_gpio_irq_unmask(unsigned int irq) @@ -352,7 +264,7 @@ static void ep93xx_gpio_irq_unmask(unsigned int irq) int port = line >> 3; gpio_int_unmasked[port] |= 1 << (line & 7); - update_gpio_int_params(port); + ep93xx_gpio_update_int_params(port); } @@ -368,7 +280,7 @@ static int ep93xx_gpio_irq_type(unsigned int irq, unsigned int type) const int port = gpio >> 3; const int port_mask = 1 << (gpio & 7); - ep93xx_gpio_set_direction(gpio, GPIO_IN); + gpio_direction_output(gpio, gpio_get_value(gpio)); switch (type) { case IRQT_RISING: @@ -411,7 +323,7 @@ static int ep93xx_gpio_irq_type(unsigned int irq, unsigned int type) desc->status &= ~IRQ_TYPE_SENSE_MASK; desc->status |= type & IRQ_TYPE_SENSE_MASK; - update_gpio_int_params(port); + ep93xx_gpio_update_int_params(port); return 0; } @@ -549,6 +461,7 @@ static struct platform_device ep93xx_ohci_device = { .resource = ep93xx_ohci_resources, }; +extern void ep93xx_gpio_init(void); void __init ep93xx_init_devices(void) { @@ -562,6 +475,8 @@ void __init ep93xx_init_devices(void) __raw_writel(0xaa, EP93XX_SYSCON_SWLOCK); __raw_writel(v, EP93XX_SYSCON_DEVICE_CONFIG); + ep93xx_gpio_init(); + amba_device_register(&uart1_device, &iomem_resource); amba_device_register(&uart2_device, &iomem_resource); amba_device_register(&uart3_device, &iomem_resource); |