From d056ab78558c03e6d31c031f7b83f0cb10bee7d4 Mon Sep 17 00:00:00 2001 From: Hartley Sweeten Date: Tue, 23 Feb 2010 21:41:17 +0100 Subject: ARM: 5954/1: ep93xx: move gpio interrupt support to gpio.c The GPIO support in core.c handles the interrupt support for GPIO ports A, B, and F. The gpiolib implementation in gpio.c needs to access the function ep93xx_gpio_int_mask when a gpio pin is made an output and ep93xx_gpio_update_int_params in order to update the registers. Moving this support from core.c to gpio.c allows making the two functions static. It also keeps all the GPIO handling together in one file. Signed-off-by: H Hartley Sweeten Acked-by: Ryan Mallon Signed-off-by: Russell King --- arch/arm/mach-ep93xx/core.c | 224 +------------------------------------------- 1 file changed, 2 insertions(+), 222 deletions(-) (limited to 'arch/arm/mach-ep93xx/core.c') diff --git a/arch/arm/mach-ep93xx/core.c b/arch/arm/mach-ep93xx/core.c index a334914b59ff..1905676b08b2 100644 --- a/arch/arm/mach-ep93xx/core.c +++ b/arch/arm/mach-ep93xx/core.c @@ -136,237 +136,17 @@ struct sys_timer ep93xx_timer = { }; -/************************************************************************* - * GPIO handling for EP93xx - *************************************************************************/ -static unsigned char gpio_int_unmasked[3]; -static unsigned char gpio_int_enabled[3]; -static unsigned char gpio_int_type1[3]; -static unsigned char gpio_int_type2[3]; -static unsigned char gpio_int_debounce[3]; - -/* Port ordering is: A B F */ -static const u8 int_type1_register_offset[3] = { 0x90, 0xac, 0x4c }; -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, 0x58 }; -static const u8 int_debounce_register_offset[3] = { 0xa8, 0xc4, 0x64 }; - -void ep93xx_gpio_update_int_params(unsigned port) -{ - BUG_ON(port > 2); - - __raw_writeb(0, EP93XX_GPIO_REG(int_en_register_offset[port])); - - __raw_writeb(gpio_int_type2[port], - EP93XX_GPIO_REG(int_type2_register_offset[port])); - - __raw_writeb(gpio_int_type1[port], - EP93XX_GPIO_REG(int_type1_register_offset[port])); - - __raw_writeb(gpio_int_unmasked[port] & gpio_int_enabled[port], - EP93XX_GPIO_REG(int_en_register_offset[port])); -} - -void ep93xx_gpio_int_mask(unsigned line) -{ - gpio_int_unmasked[line >> 3] &= ~(1 << (line & 7)); -} - -void ep93xx_gpio_int_debounce(unsigned int irq, int enable) -{ - int line = irq_to_gpio(irq); - int port = line >> 3; - int port_mask = 1 << (line & 7); - - if (enable) - gpio_int_debounce[port] |= port_mask; - else - gpio_int_debounce[port] &= ~port_mask; - - __raw_writeb(gpio_int_debounce[port], - EP93XX_GPIO_REG(int_debounce_register_offset[port])); -} -EXPORT_SYMBOL(ep93xx_gpio_int_debounce); - /************************************************************************* * EP93xx IRQ handling *************************************************************************/ -static void ep93xx_gpio_ab_irq_handler(unsigned int irq, struct irq_desc *desc) -{ - unsigned char status; - int i; - - status = __raw_readb(EP93XX_GPIO_A_INT_STATUS); - for (i = 0; i < 8; i++) { - if (status & (1 << i)) { - int gpio_irq = gpio_to_irq(EP93XX_GPIO_LINE_A(0)) + i; - generic_handle_irq(gpio_irq); - } - } - - status = __raw_readb(EP93XX_GPIO_B_INT_STATUS); - for (i = 0; i < 8; i++) { - if (status & (1 << i)) { - int gpio_irq = gpio_to_irq(EP93XX_GPIO_LINE_B(0)) + i; - generic_handle_irq(gpio_irq); - } - } -} - -static void ep93xx_gpio_f_irq_handler(unsigned int irq, struct irq_desc *desc) -{ - /* - * map discontiguous hw irq range to continous sw irq range: - * - * IRQ_EP93XX_GPIO{0..7}MUX -> gpio_to_irq(EP93XX_GPIO_LINE_F({0..7}) - */ - int port_f_idx = ((irq + 1) & 7) ^ 4; /* {19..22,47..50} -> {0..7} */ - int gpio_irq = gpio_to_irq(EP93XX_GPIO_LINE_F(0)) + port_f_idx; - - generic_handle_irq(gpio_irq); -} - -static void ep93xx_gpio_irq_ack(unsigned int irq) -{ - int line = irq_to_gpio(irq); - int port = line >> 3; - int port_mask = 1 << (line & 7); - - if ((irq_desc[irq].status & IRQ_TYPE_SENSE_MASK) == IRQ_TYPE_EDGE_BOTH) { - gpio_int_type2[port] ^= port_mask; /* switch edge direction */ - ep93xx_gpio_update_int_params(port); - } - - __raw_writeb(port_mask, EP93XX_GPIO_REG(eoi_register_offset[port])); -} - -static void ep93xx_gpio_irq_mask_ack(unsigned int irq) -{ - int line = irq_to_gpio(irq); - int port = line >> 3; - int port_mask = 1 << (line & 7); - - if ((irq_desc[irq].status & IRQ_TYPE_SENSE_MASK) == IRQ_TYPE_EDGE_BOTH) - gpio_int_type2[port] ^= port_mask; /* switch edge direction */ - - gpio_int_unmasked[port] &= ~port_mask; - ep93xx_gpio_update_int_params(port); - - __raw_writeb(port_mask, EP93XX_GPIO_REG(eoi_register_offset[port])); -} - -static void ep93xx_gpio_irq_mask(unsigned int irq) -{ - int line = irq_to_gpio(irq); - int port = line >> 3; - - gpio_int_unmasked[port] &= ~(1 << (line & 7)); - ep93xx_gpio_update_int_params(port); -} - -static void ep93xx_gpio_irq_unmask(unsigned int irq) -{ - int line = irq_to_gpio(irq); - int port = line >> 3; - - gpio_int_unmasked[port] |= 1 << (line & 7); - ep93xx_gpio_update_int_params(port); -} - - -/* - * gpio_int_type1 controls whether the interrupt is level (0) or - * edge (1) triggered, while gpio_int_type2 controls whether it - * triggers on low/falling (0) or high/rising (1). - */ -static int ep93xx_gpio_irq_type(unsigned int irq, unsigned int type) -{ - struct irq_desc *desc = irq_desc + irq; - const int gpio = irq_to_gpio(irq); - const int port = gpio >> 3; - const int port_mask = 1 << (gpio & 7); - - gpio_direction_input(gpio); - - switch (type) { - case IRQ_TYPE_EDGE_RISING: - gpio_int_type1[port] |= port_mask; - gpio_int_type2[port] |= port_mask; - desc->handle_irq = handle_edge_irq; - break; - case IRQ_TYPE_EDGE_FALLING: - gpio_int_type1[port] |= port_mask; - gpio_int_type2[port] &= ~port_mask; - desc->handle_irq = handle_edge_irq; - break; - case IRQ_TYPE_LEVEL_HIGH: - gpio_int_type1[port] &= ~port_mask; - gpio_int_type2[port] |= port_mask; - desc->handle_irq = handle_level_irq; - break; - case IRQ_TYPE_LEVEL_LOW: - gpio_int_type1[port] &= ~port_mask; - gpio_int_type2[port] &= ~port_mask; - desc->handle_irq = handle_level_irq; - break; - case IRQ_TYPE_EDGE_BOTH: - gpio_int_type1[port] |= port_mask; - /* set initial polarity based on current input level */ - if (gpio_get_value(gpio)) - gpio_int_type2[port] &= ~port_mask; /* falling */ - else - gpio_int_type2[port] |= port_mask; /* rising */ - desc->handle_irq = handle_edge_irq; - break; - default: - pr_err("failed to set irq type %d for gpio %d\n", type, gpio); - return -EINVAL; - } - - gpio_int_enabled[port] |= port_mask; - - desc->status &= ~IRQ_TYPE_SENSE_MASK; - desc->status |= type & IRQ_TYPE_SENSE_MASK; - - ep93xx_gpio_update_int_params(port); - - return 0; -} - -static struct irq_chip ep93xx_gpio_irq_chip = { - .name = "GPIO", - .ack = ep93xx_gpio_irq_ack, - .mask_ack = ep93xx_gpio_irq_mask_ack, - .mask = ep93xx_gpio_irq_mask, - .unmask = ep93xx_gpio_irq_unmask, - .set_type = ep93xx_gpio_irq_type, -}; - +extern void ep93xx_gpio_init_irq(void); void __init ep93xx_init_irq(void) { - int gpio_irq; - vic_init(EP93XX_VIC1_BASE, 0, EP93XX_VIC1_VALID_IRQ_MASK, 0); vic_init(EP93XX_VIC2_BASE, 32, EP93XX_VIC2_VALID_IRQ_MASK, 0); - for (gpio_irq = gpio_to_irq(0); - gpio_irq <= gpio_to_irq(EP93XX_GPIO_LINE_MAX_IRQ); ++gpio_irq) { - set_irq_chip(gpio_irq, &ep93xx_gpio_irq_chip); - set_irq_handler(gpio_irq, handle_level_irq); - set_irq_flags(gpio_irq, IRQF_VALID); - } - - set_irq_chained_handler(IRQ_EP93XX_GPIO_AB, ep93xx_gpio_ab_irq_handler); - set_irq_chained_handler(IRQ_EP93XX_GPIO0MUX, ep93xx_gpio_f_irq_handler); - set_irq_chained_handler(IRQ_EP93XX_GPIO1MUX, ep93xx_gpio_f_irq_handler); - set_irq_chained_handler(IRQ_EP93XX_GPIO2MUX, ep93xx_gpio_f_irq_handler); - set_irq_chained_handler(IRQ_EP93XX_GPIO3MUX, ep93xx_gpio_f_irq_handler); - set_irq_chained_handler(IRQ_EP93XX_GPIO4MUX, ep93xx_gpio_f_irq_handler); - set_irq_chained_handler(IRQ_EP93XX_GPIO5MUX, ep93xx_gpio_f_irq_handler); - set_irq_chained_handler(IRQ_EP93XX_GPIO6MUX, ep93xx_gpio_f_irq_handler); - set_irq_chained_handler(IRQ_EP93XX_GPIO7MUX, ep93xx_gpio_f_irq_handler); + ep93xx_gpio_init_irq(); } -- cgit v1.2.3