diff options
Diffstat (limited to 'arch/arm/mach-pxa/irq.c')
| -rw-r--r-- | arch/arm/mach-pxa/irq.c | 184 |
1 files changed, 1 insertions, 183 deletions
diff --git a/arch/arm/mach-pxa/irq.c b/arch/arm/mach-pxa/irq.c index 4fd4560dd3a..da3a44a4249 100644 --- a/arch/arm/mach-pxa/irq.c +++ b/arch/arm/mach-pxa/irq.c @@ -1,7 +1,7 @@ /* * linux/arch/arm/mach-pxa/irq.c * - * Generic PXA IRQ handling, GPIO IRQ demultiplexing, etc. + * Generic PXA IRQ handling * * Author: Nicolas Pitre * Created: Jun 15, 2001 @@ -104,188 +104,6 @@ void __init pxa_init_irq_high(void) } #endif -/* - * PXA GPIO edge detection for IRQs: - * IRQs are generated on Falling-Edge, Rising-Edge, or both. - * Use this instead of directly setting GRER/GFER. - */ - -static long GPIO_IRQ_rising_edge[4]; -static long GPIO_IRQ_falling_edge[4]; -static long GPIO_IRQ_mask[4]; - -static int pxa_gpio_irq_type(unsigned int irq, unsigned int type) -{ - int gpio, idx; - - gpio = IRQ_TO_GPIO(irq); - idx = gpio >> 5; - - if (type == IRQ_TYPE_PROBE) { - /* Don't mess with enabled GPIOs using preconfigured edges or - * GPIOs set to alternate function or to output during probe - */ - if ((GPIO_IRQ_rising_edge[idx] | - GPIO_IRQ_falling_edge[idx] | - GPDR(gpio)) & GPIO_bit(gpio)) - return 0; - if (GAFR(gpio) & (0x3 << (((gpio) & 0xf)*2))) - return 0; - type = IRQ_TYPE_EDGE_RISING | IRQ_TYPE_EDGE_FALLING; - } - - pxa_gpio_mode(gpio | GPIO_IN); - - if (type & IRQ_TYPE_EDGE_RISING) - __set_bit(gpio, GPIO_IRQ_rising_edge); - else - __clear_bit(gpio, GPIO_IRQ_rising_edge); - - if (type & IRQ_TYPE_EDGE_FALLING) - __set_bit(gpio, GPIO_IRQ_falling_edge); - else - __clear_bit(gpio, GPIO_IRQ_falling_edge); - - GRER(gpio) = GPIO_IRQ_rising_edge[idx] & GPIO_IRQ_mask[idx]; - GFER(gpio) = GPIO_IRQ_falling_edge[idx] & GPIO_IRQ_mask[idx]; - - pr_debug("%s: IRQ%d (GPIO%d) - edge%s%s\n", __func__, irq, gpio, - ((type & IRQ_TYPE_EDGE_RISING) ? " rising" : ""), - ((type & IRQ_TYPE_EDGE_FALLING) ? " falling" : "")); - return 0; -} - -/* - * GPIO IRQs must be acknowledged. This is for GPIO 0 and 1. - */ - -static void pxa_ack_low_gpio(unsigned int irq) -{ - GEDR0 = (1 << (irq - IRQ_GPIO0)); -} - -static void pxa_mask_low_gpio(unsigned int irq) -{ - ICMR &= ~(1 << (irq - PXA_IRQ(0))); -} - -static void pxa_unmask_low_gpio(unsigned int irq) -{ - ICMR |= 1 << (irq - PXA_IRQ(0)); -} - -static struct irq_chip pxa_low_gpio_chip = { - .name = "GPIO-l", - .ack = pxa_ack_low_gpio, - .mask = pxa_mask_low_gpio, - .unmask = pxa_unmask_low_gpio, - .set_type = pxa_gpio_irq_type, -}; - -/* - * Demux handler for GPIO>=2 edge detect interrupts - */ - -#define GEDR_BITS (sizeof(gedr) * BITS_PER_BYTE) - -static void pxa_gpio_demux_handler(unsigned int irq, struct irq_desc *desc) -{ - int loop, bit, n; - unsigned long gedr[4]; - - do { - gedr[0] = GEDR0 & GPIO_IRQ_mask[0] & ~3; - gedr[1] = GEDR1 & GPIO_IRQ_mask[1]; - gedr[2] = GEDR2 & GPIO_IRQ_mask[2]; - gedr[3] = GEDR3 & GPIO_IRQ_mask[3]; - - GEDR0 = gedr[0]; GEDR1 = gedr[1]; - GEDR2 = gedr[2]; GEDR3 = gedr[3]; - - loop = 0; - bit = find_first_bit(gedr, GEDR_BITS); - while (bit < GEDR_BITS) { - loop = 1; - - n = PXA_GPIO_IRQ_BASE + bit; - desc_handle_irq(n, irq_desc + n); - - bit = find_next_bit(gedr, GEDR_BITS, bit + 1); - } - } while (loop); -} - -static void pxa_ack_muxed_gpio(unsigned int irq) -{ - int gpio = irq - IRQ_GPIO(2) + 2; - GEDR(gpio) = GPIO_bit(gpio); -} - -static void pxa_mask_muxed_gpio(unsigned int irq) -{ - int gpio = irq - IRQ_GPIO(2) + 2; - __clear_bit(gpio, GPIO_IRQ_mask); - GRER(gpio) &= ~GPIO_bit(gpio); - GFER(gpio) &= ~GPIO_bit(gpio); -} - -static void pxa_unmask_muxed_gpio(unsigned int irq) -{ - int gpio = irq - IRQ_GPIO(2) + 2; - int idx = gpio >> 5; - __set_bit(gpio, GPIO_IRQ_mask); - GRER(gpio) = GPIO_IRQ_rising_edge[idx] & GPIO_IRQ_mask[idx]; - GFER(gpio) = GPIO_IRQ_falling_edge[idx] & GPIO_IRQ_mask[idx]; -} - -static struct irq_chip pxa_muxed_gpio_chip = { - .name = "GPIO", - .ack = pxa_ack_muxed_gpio, - .mask = pxa_mask_muxed_gpio, - .unmask = pxa_unmask_muxed_gpio, - .set_type = pxa_gpio_irq_type, -}; - -void __init pxa_init_irq_gpio(int gpio_nr) -{ - int irq, i; - - pxa_last_gpio = gpio_nr - 1; - - /* clear all GPIO edge detects */ - for (i = 0; i < gpio_nr; i += 32) { - GFER(i) = 0; - GRER(i) = 0; - GEDR(i) = GEDR(i); - } - - /* GPIO 0 and 1 must have their mask bit always set */ - GPIO_IRQ_mask[0] = 3; - - for (irq = IRQ_GPIO0; irq <= IRQ_GPIO1; irq++) { - set_irq_chip(irq, &pxa_low_gpio_chip); - set_irq_handler(irq, handle_edge_irq); - set_irq_flags(irq, IRQF_VALID | IRQF_PROBE); - } - - for (irq = IRQ_GPIO(2); irq < IRQ_GPIO(gpio_nr); irq++) { - set_irq_chip(irq, &pxa_muxed_gpio_chip); - set_irq_handler(irq, handle_edge_irq); - set_irq_flags(irq, IRQF_VALID | IRQF_PROBE); - } - - /* Install handler for GPIO>=2 edge detect interrupts */ - set_irq_chained_handler(IRQ_GPIO_2_x, pxa_gpio_demux_handler); - - pxa_init_gpio(gpio_nr); -} - -void __init pxa_init_gpio_set_wake(int (*set_wake)(unsigned int, unsigned int)) -{ - pxa_low_gpio_chip.set_wake = set_wake; - pxa_muxed_gpio_chip.set_wake = set_wake; -} - void __init pxa_init_irq_set_wake(int (*set_wake)(unsigned int, unsigned int)) { pxa_internal_chip_low.set_wake = set_wake; |