| Greg Ungerer | da3601a | 2009-05-22 14:16:39 +1000 | [diff] [blame^] | 1 | /* |
| 2 | * intc2.c -- support for the 2nd INTC controller of the 5249 |
| 3 | * |
| 4 | * (C) Copyright 2009, Greg Ungerer <gerg@snapgear.com> |
| 5 | * |
| 6 | * This file is subject to the terms and conditions of the GNU General Public |
| 7 | * License. See the file COPYING in the main directory of this archive |
| 8 | * for more details. |
| 9 | */ |
| 10 | |
| 11 | #include <linux/types.h> |
| 12 | #include <linux/init.h> |
| 13 | #include <linux/kernel.h> |
| 14 | #include <linux/interrupt.h> |
| 15 | #include <linux/irq.h> |
| 16 | #include <linux/io.h> |
| 17 | #include <asm/coldfire.h> |
| 18 | #include <asm/mcfsim.h> |
| 19 | |
| 20 | static void intc2_irq_gpio_mask(unsigned int irq) |
| 21 | { |
| 22 | u32 imr; |
| 23 | imr = readl(MCF_MBAR2 + MCFSIM2_GPIOINTENABLE); |
| 24 | imr &= ~(0x1 << (irq - MCFINTC2_GPIOIRQ0)); |
| 25 | writel(imr, MCF_MBAR2 + MCFSIM2_GPIOINTENABLE); |
| 26 | } |
| 27 | |
| 28 | static void intc2_irq_gpio_unmask(unsigned int irq) |
| 29 | { |
| 30 | u32 imr; |
| 31 | imr = readl(MCF_MBAR2 + MCFSIM2_GPIOINTENABLE); |
| 32 | imr |= (0x1 << (irq - MCFINTC2_GPIOIRQ0)); |
| 33 | writel(imr, MCF_MBAR2 + MCFSIM2_GPIOINTENABLE); |
| 34 | } |
| 35 | |
| 36 | static void intc2_irq_gpio_ack(unsigned int irq) |
| 37 | { |
| 38 | writel(0x1 << (irq - MCFINTC2_GPIOIRQ0), MCF_MBAR2 + MCFSIM2_GPIOINTCLEAR); |
| 39 | } |
| 40 | |
| 41 | static struct irq_chip intc2_irq_gpio_chip = { |
| 42 | .name = "CF-INTC2", |
| 43 | .mask = intc2_irq_gpio_mask, |
| 44 | .unmask = intc2_irq_gpio_unmask, |
| 45 | .ack = intc2_irq_gpio_ack, |
| 46 | }; |
| 47 | |
| 48 | static int __init mcf_intc2_init(void) |
| 49 | { |
| 50 | int irq; |
| 51 | |
| 52 | /* GPIO interrupt sources */ |
| 53 | for (irq = MCFINTC2_GPIOIRQ0; (irq <= MCFINTC2_GPIOIRQ7); irq++) |
| 54 | irq_desc[irq].chip = &intc2_irq_gpio_chip; |
| 55 | |
| 56 | return 0; |
| 57 | } |
| 58 | |
| 59 | arch_initcall(mcf_intc2_init); |