diff options
| -rw-r--r-- | arch/arm/mach-pxa/generic.h | 6 | ||||
| -rw-r--r-- | arch/arm/mach-pxa/gpio.c | 113 | ||||
| -rw-r--r-- | arch/arm/mach-pxa/include/mach/gpio.h | 38 | ||||
| -rw-r--r-- | arch/arm/mach-pxa/irq.c | 68 | ||||
| -rw-r--r-- | arch/arm/mach-pxa/pxa25x.c | 5 | ||||
| -rw-r--r-- | arch/arm/mach-pxa/pxa27x.c | 3 | ||||
| -rw-r--r-- | arch/arm/mach-pxa/pxa3xx.c | 3 |
7 files changed, 138 insertions, 98 deletions
diff --git a/arch/arm/mach-pxa/generic.h b/arch/arm/mach-pxa/generic.h index dc876a8..bc12c94 100644 --- a/arch/arm/mach-pxa/generic.h +++ b/arch/arm/mach-pxa/generic.h @@ -9,13 +9,11 @@ * published by the Free Software Foundation. */ -typedef int (*set_wake_t)(unsigned int, unsigned int); - struct sys_timer; extern struct sys_timer pxa_timer; -extern void __init pxa_init_irq(int irq_nr, set_wake_t fn); -extern void __init pxa_init_gpio(int gpio_nr, set_wake_t fn); +extern void __init pxa_init_irq(int irq_nr, + int (*set_wake)(unsigned int, unsigned int)); extern void __init pxa25x_init_irq(void); extern void __init pxa27x_init_irq(void); extern void __init pxa3xx_init_irq(void); diff --git a/arch/arm/mach-pxa/gpio.c b/arch/arm/mach-pxa/gpio.c index 5fec1e4..1982460 100644 --- a/arch/arm/mach-pxa/gpio.c +++ b/arch/arm/mach-pxa/gpio.c @@ -45,18 +45,6 @@ struct pxa_gpio_chip { int pxa_last_gpio; -#ifdef CONFIG_CPU_PXA26x -/* GPIO86/87/88/89 on PXA26x have their direction bits in GPDR2 inverted, - * as well as their Alternate Function value being '1' for GPIO in GAFRx. - */ -static int __gpio_is_inverted(unsigned gpio) -{ - return cpu_is_pxa25x() && gpio > 85; -} -#else -#define __gpio_is_inverted(gpio) (0) -#endif - /* * Configure pins for GPIO or other functions */ @@ -185,6 +173,20 @@ static struct pxa_gpio_chip pxa_gpio_chip[] = { #endif }; +static void __init pxa_init_gpio_chip(int gpio_nr) +{ + int i, gpio; + + /* add a GPIO chip for each register bank. + * the last PXA25x register only contains 21 GPIOs + */ + for (gpio = 0, i = 0; gpio < gpio_nr; gpio += 32, i++) { + if (gpio + 32 > gpio_nr) + pxa_gpio_chip[i].chip.ngpio = gpio_nr - gpio; + gpiochip_add(&pxa_gpio_chip[i].chip); + } +} + /* * PXA GPIO edge detection for IRQs: * IRQs are generated on Falling-Edge, Rising-Edge, or both. @@ -195,27 +197,6 @@ static unsigned long GPIO_IRQ_rising_edge[4]; static unsigned long GPIO_IRQ_falling_edge[4]; static unsigned long GPIO_IRQ_mask[4]; -/* - * On PXA25x and PXA27x, GAFRx and GPDRx together decide the alternate - * function of a GPIO, and GPDRx cannot be altered once configured. It - * is attributed as "occupied" here (I know this terminology isn't - * accurate, you are welcome to propose a better one :-) - */ -static int __gpio_is_occupied(unsigned gpio) -{ - if (cpu_is_pxa27x() || cpu_is_pxa25x()) { - int af = (GAFR(gpio) >> ((gpio & 0xf) * 2)) & 0x3; - int dir = GPDR(gpio) & GPIO_bit(gpio); - - if (__gpio_is_inverted(gpio)) - return af != 1 || dir == 0; - else - return af != 0 || dir != 0; - } - - return 0; -} - static int pxa_gpio_irq_type(unsigned int irq, unsigned int type) { int gpio, idx; @@ -262,33 +243,6 @@ static int pxa_gpio_irq_type(unsigned int irq, unsigned int type) } /* - * 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 */ @@ -352,48 +306,31 @@ static struct irq_chip pxa_muxed_gpio_chip = { .set_type = pxa_gpio_irq_type, }; -void __init pxa_init_gpio(int gpio_nr, set_wake_t fn) +void __init pxa_init_gpio(int mux_irq, int start, int end, set_wake_t fn) { - int irq, i, gpio; + int irq, i; - pxa_last_gpio = gpio_nr - 1; + pxa_last_gpio = end; /* clear all GPIO edge detects */ - for (i = 0; i < gpio_nr; i += 32) { - GFER(i) = 0; - GRER(i) = 0; - GEDR(i) = GEDR(i); + for (i = start; i <= end; i += 32) { + GFER(i) &= ~GPIO_IRQ_mask[i]; + GRER(i) &= ~GPIO_IRQ_mask[i]; + GEDR(i) = GPIO_IRQ_mask[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++) { + for (irq = gpio_to_irq(start); irq <= gpio_to_irq(end); 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_low_gpio_chip.set_wake = fn; + set_irq_chained_handler(mux_irq, pxa_gpio_demux_handler); pxa_muxed_gpio_chip.set_wake = fn; - /* add a GPIO chip for each register bank. - * the last PXA25x register only contains 21 GPIOs - */ - for (gpio = 0, i = 0; gpio < gpio_nr; gpio += 32, i++) { - if (gpio + 32 > gpio_nr) - pxa_gpio_chip[i].chip.ngpio = gpio_nr - gpio; - gpiochip_add(&pxa_gpio_chip[i].chip); - } + /* Initialize GPIO chips */ + pxa_init_gpio_chip(end + 1); } #ifdef CONFIG_PM diff --git a/arch/arm/mach-pxa/include/mach/gpio.h b/arch/arm/mach-pxa/include/mach/gpio.h index 2c538d8..c7ac3d6 100644 --- a/arch/arm/mach-pxa/include/mach/gpio.h +++ b/arch/arm/mach-pxa/include/mach/gpio.h @@ -56,10 +56,44 @@ static inline void gpio_set_value(unsigned gpio, int value) } } -#define gpio_cansleep __gpio_cansleep - +#define gpio_cansleep __gpio_cansleep #define gpio_to_irq(gpio) IRQ_GPIO(gpio) #define irq_to_gpio(irq) IRQ_TO_GPIO(irq) +#ifdef CONFIG_CPU_PXA26x +/* GPIO86/87/88/89 on PXA26x have their direction bits in GPDR2 inverted, + * as well as their Alternate Function value being '1' for GPIO in GAFRx. + */ +static inline int __gpio_is_inverted(unsigned gpio) +{ + return cpu_is_pxa25x() && gpio > 85; +} +#else +static inline int __gpio_is_inverted(unsigned gpio) { return 0; } +#endif + +/* + * On PXA25x and PXA27x, GAFRx and GPDRx together decide the alternate + * function of a GPIO, and GPDRx cannot be altered once configured. It + * is attributed as "occupied" here (I know this terminology isn't + * accurate, you are welcome to propose a better one :-) + */ +static inline int __gpio_is_occupied(unsigned gpio) +{ + if (cpu_is_pxa27x() || cpu_is_pxa25x()) { + int af = (GAFR(gpio) >> ((gpio & 0xf) * 2)) & 0x3; + int dir = GPDR(gpio) & GPIO_bit(gpio); + + if (__gpio_is_inverted(gpio)) + return af != 1 || dir == 0; + else + return af != 0 || dir != 0; + } else + return GPDR(gpio) & GPIO_bit(gpio); +} + +typedef int (*set_wake_t)(unsigned int irq, unsigned int on); + +extern void pxa_init_gpio(int mux_irq, int start, int end, set_wake_t fn); #endif diff --git a/arch/arm/mach-pxa/irq.c b/arch/arm/mach-pxa/irq.c index fa69c3a..d3d40a3 100644 --- a/arch/arm/mach-pxa/irq.c +++ b/arch/arm/mach-pxa/irq.c @@ -21,6 +21,7 @@ #include <asm/irq.h> #include <asm/mach/irq.h> #include <mach/pxa-regs.h> +#include <mach/gpio.h> #include "generic.h" @@ -51,6 +52,72 @@ static struct irq_chip pxa_internal_irq_chip = { .unmask = pxa_unmask_irq, }; +/* + * GPIO IRQs for GPIO 0 and 1 + */ +static int pxa_set_low_gpio_type(unsigned int irq, unsigned int type) +{ + int gpio = irq - IRQ_GPIO0; + + if (__gpio_is_occupied(gpio)) { + pr_err("%s failed: GPIO is configured\n", __func__); + return -EINVAL; + } + + if (type & IRQ_TYPE_EDGE_RISING) + GRER0 |= GPIO_bit(gpio); + else + GRER0 &= ~GPIO_bit(gpio); + + if (type & IRQ_TYPE_EDGE_FALLING) + GFER0 |= GPIO_bit(gpio); + else + GFER0 &= ~GPIO_bit(gpio); + + return 0; +} + +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_set_low_gpio_type, +}; + +static void __init pxa_init_low_gpio_irq(set_wake_t fn) +{ + int irq; + + /* clear edge detection on GPIO 0 and 1 */ + GFER0 &= ~0x3; + GRER0 &= ~0x3; + GEDR0 = 0x3; + + 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); + } + + pxa_low_gpio_chip.set_wake = fn; +} + void __init pxa_init_irq(int irq_nr, set_wake_t fn) { int irq; @@ -72,6 +139,7 @@ void __init pxa_init_irq(int irq_nr, set_wake_t fn) } pxa_internal_irq_chip.set_wake = fn; + pxa_init_low_gpio_irq(fn); } #ifdef CONFIG_PM diff --git a/arch/arm/mach-pxa/pxa25x.c b/arch/arm/mach-pxa/pxa25x.c index 2332e2d..77c2693 100644 --- a/arch/arm/mach-pxa/pxa25x.c +++ b/arch/arm/mach-pxa/pxa25x.c @@ -25,6 +25,7 @@ #include <mach/hardware.h> #include <mach/irqs.h> +#include <mach/gpio.h> #include <mach/pxa25x.h> #include <mach/reset.h> #include <mach/pm.h> @@ -308,14 +309,14 @@ set_pwer: void __init pxa25x_init_irq(void) { pxa_init_irq(32, pxa25x_set_wake); - pxa_init_gpio(85, pxa25x_set_wake); + pxa_init_gpio(IRQ_GPIO_2_x, 2, 84, pxa25x_set_wake); } #ifdef CONFIG_CPU_PXA26x void __init pxa26x_init_irq(void) { pxa_init_irq(32, pxa25x_set_wake); - pxa_init_gpio(90, pxa25x_set_wake); + pxa_init_gpio(IRQ_GPIO_2_x, 2, 89, pxa25x_set_wake); } #endif diff --git a/arch/arm/mach-pxa/pxa27x.c b/arch/arm/mach-pxa/pxa27x.c index c8b469b..a425ec7 100644 --- a/arch/arm/mach-pxa/pxa27x.c +++ b/arch/arm/mach-pxa/pxa27x.c @@ -21,6 +21,7 @@ #include <mach/hardware.h> #include <asm/irq.h> #include <mach/irqs.h> +#include <mach/gpio.h> #include <mach/pxa27x.h> #include <mach/reset.h> #include <mach/ohci.h> @@ -330,7 +331,7 @@ static int pxa27x_set_wake(unsigned int irq, unsigned int on) void __init pxa27x_init_irq(void) { pxa_init_irq(34, pxa27x_set_wake); - pxa_init_gpio(121, pxa27x_set_wake); + pxa_init_gpio(IRQ_GPIO_2_x, 2, 120, pxa27x_set_wake); } /* diff --git a/arch/arm/mach-pxa/pxa3xx.c b/arch/arm/mach-pxa/pxa3xx.c index e626b79..b02d454 100644 --- a/arch/arm/mach-pxa/pxa3xx.c +++ b/arch/arm/mach-pxa/pxa3xx.c @@ -23,6 +23,7 @@ #include <linux/sysdev.h> #include <mach/hardware.h> +#include <mach/gpio.h> #include <mach/pxa3xx-regs.h> #include <mach/reset.h> #include <mach/ohci.h> @@ -538,7 +539,7 @@ void __init pxa3xx_init_irq(void) __asm__ __volatile__("mcr p15, 0, %0, c15, c1, 0\n": :"r"(value)); pxa_init_irq(56, pxa3xx_set_wake); - pxa_init_gpio(128, NULL); + pxa_init_gpio(IRQ_GPIO_2_x, 2, 127, NULL); } /* |