+++ /dev/null
-/*
- * This file is subject to the terms and conditions of the GNU General Public
- * License. See the file "COPYING" in the main directory of this archive
- * for more details.
- *
- * Copyright (C) 2003 Atheros Communications, Inc., All Rights Reserved.
- * Copyright (C) 2006 FON Technology, SL.
- * Copyright (C) 2006 Imre Kaloz <kaloz@openwrt.org>
- * Copyright (C) 2006 Felix Fietkau <nbd@openwrt.org>
- */
-
-/*
- * Platform devices for Atheros SoCs
- */
-
-#include <linux/init.h>
-#include <linux/module.h>
-#include <linux/types.h>
-#include <linux/string.h>
-#include <linux/kernel.h>
-#include <linux/reboot.h>
-#include <linux/interrupt.h>
-#include <asm/bootinfo.h>
-#include <asm/irq_cpu.h>
-#include <asm/io.h>
-#include "../ar531x.h"
-
-static u32 gpiointmask = 0, gpiointval = 0;
-
-static inline void ar5315_gpio_irq(void)
-{
- u32 pend;
- sysRegWrite(AR5315_ISR, sysRegRead(AR5315_IMR) | ~AR5315_ISR_GPIO);
-
- /* only do one gpio interrupt at a time */
- pend = (sysRegRead(AR5315_GPIO_DI) ^ gpiointval) & gpiointmask;
- if (!pend)
- return;
-
- do_IRQ(AR531X_GPIO_IRQ_BASE + 31 - clz(pend));
-}
-
-
-/*
- * Called when an interrupt is received, this function
- * determines exactly which interrupt it was, and it
- * invokes the appropriate handler.
- *
- * Implicitly, we also define interrupt priority by
- * choosing which to dispatch first.
- */
-asmlinkage void ar5315_irq_dispatch(void)
-{
- int pending = read_c0_status() & read_c0_cause();
-
- if (pending & CAUSEF_IP3)
- do_IRQ(AR5315_IRQ_WLAN0_INTRS);
- else if (pending & CAUSEF_IP4)
- do_IRQ(AR5315_IRQ_ENET0_INTRS);
- else if (pending & CAUSEF_IP2) {
- unsigned int ar531x_misc_intrs = sysRegRead(AR5315_ISR) & sysRegRead(AR5315_IMR);
-
- if (ar531x_misc_intrs & AR5315_ISR_SPI)
- do_IRQ(AR531X_MISC_IRQ_SPI);
- else if (ar531x_misc_intrs & AR5315_ISR_TIMER)
- do_IRQ(AR531X_MISC_IRQ_TIMER);
- else if (ar531x_misc_intrs & AR5315_ISR_AHB)
- do_IRQ(AR531X_MISC_IRQ_AHB_PROC);
- else if (ar531x_misc_intrs & AR5315_ISR_GPIO)
- ar5315_gpio_irq();
- else if (ar531x_misc_intrs & AR5315_ISR_UART0)
- do_IRQ(AR531X_MISC_IRQ_UART0);
- else if (ar531x_misc_intrs & AR5315_ISR_WD)
- do_IRQ(AR531X_MISC_IRQ_WATCHDOG);
- else
- do_IRQ(AR531X_MISC_IRQ_NONE);
- } else if (pending & CAUSEF_IP7)
- do_IRQ(AR531X_IRQ_CPU_CLOCK);
- else
- do_IRQ(AR531X_IRQ_NONE);
-}
-
-static void ar5315_gpio_intr_enable(unsigned int irq)
-{
- u32 gpio, mask;
- gpio = irq - AR531X_GPIO_IRQ_BASE;
- mask = 1 << gpio;
- gpiointmask |= mask;
-
- /* reconfigure GPIO line as input */
- sysRegMask(AR5315_GPIO_CR, AR5315_GPIO_CR_M(gpio), AR5315_GPIO_CR_I(gpio));
-
- /* Enable interrupt with edge detection */
- sysRegMask(AR5315_GPIO_INT, AR5315_GPIO_INT_M | AR5315_GPIO_INT_LVL_M, gpio | AR5315_GPIO_INT_LVL(3));
-}
-
-static void ar5315_gpio_intr_disable(unsigned int irq)
-{
- u32 gpio, mask;
- gpio = irq - AR531X_GPIO_IRQ_BASE;
- mask = 1 << gpio;
-
- gpiointmask &= ~mask;
-
- /* Disable interrupt with edge detection */
- sysRegMask(AR5315_GPIO_INT, AR5315_GPIO_INT_M | AR5315_GPIO_INT_LVL_M, gpio | AR5315_GPIO_INT_LVL(0));
-}
-
-/* Turn on the specified AR531X_MISC_IRQ interrupt */
-static unsigned int ar5315_gpio_intr_startup(unsigned int irq)
-{
- ar5315_gpio_intr_enable(irq);
- return 0;
-}
-
-/* Turn off the specified AR531X_MISC_IRQ interrupt */
-static void
-ar5315_gpio_intr_shutdown(unsigned int irq)
-{
- ar5315_gpio_intr_disable(irq);
-}
-
-static void
-ar5315_gpio_intr_ack(unsigned int irq)
-{
- ar5315_gpio_intr_disable(irq);
-}
-
-static void
-ar5315_gpio_intr_end(unsigned int irq)
-{
- if (!(irq_desc[irq].status & (IRQ_DISABLED | IRQ_INPROGRESS)))
- ar5315_gpio_intr_enable(irq);
-}
-
-static struct irq_chip ar5315_gpio_intr_controller = {
- .typename = "AR5315 GPIO",
- .startup = ar5315_gpio_intr_startup,
- .shutdown = ar5315_gpio_intr_shutdown,
- .enable = ar5315_gpio_intr_enable,
- .disable = ar5315_gpio_intr_disable,
- .ack = ar5315_gpio_intr_ack,
- .end = ar5315_gpio_intr_end,
-};
-
-
-/* Enable the specified AR531X_MISC_IRQ interrupt */
-static void
-ar5315_misc_intr_enable(unsigned int irq)
-{
- unsigned int imr;
-
- imr = sysRegRead(AR5315_IMR);
- switch(irq)
- {
- case AR531X_MISC_IRQ_SPI:
- imr |= AR5315_ISR_SPI;
- break;
-
- case AR531X_MISC_IRQ_TIMER:
- imr |= AR5315_ISR_TIMER;
- break;
-
- case AR531X_MISC_IRQ_AHB_PROC:
- imr |= AR5315_ISR_AHB;
- break;
-
- case AR531X_MISC_IRQ_AHB_DMA:
- imr |= 0/* ?? */;
- break;
-
- case AR531X_MISC_IRQ_GPIO:
- imr |= AR5315_ISR_GPIO;
- break;
-
- case AR531X_MISC_IRQ_UART0:
- imr |= AR5315_ISR_UART0;
- break;
-
-
- case AR531X_MISC_IRQ_WATCHDOG:
- imr |= AR5315_ISR_WD;
- break;
-
- case AR531X_MISC_IRQ_LOCAL:
- imr |= 0/* ?? */;
- break;
-
- }
- sysRegWrite(AR5315_IMR, imr);
- imr=sysRegRead(AR5315_IMR); /* flush write buffer */
-}
-
-/* Disable the specified AR531X_MISC_IRQ interrupt */
-static void
-ar5315_misc_intr_disable(unsigned int irq)
-{
- unsigned int imr;
-
- imr = sysRegRead(AR5315_IMR);
- switch(irq)
- {
- case AR531X_MISC_IRQ_SPI:
- imr &= ~AR5315_ISR_SPI;
- break;
-
- case AR531X_MISC_IRQ_TIMER:
- imr &= (~AR5315_ISR_TIMER);
- break;
-
- case AR531X_MISC_IRQ_AHB_PROC:
- imr &= (~AR5315_ISR_AHB);
- break;
-
- case AR531X_MISC_IRQ_AHB_DMA:
- imr &= 0/* ?? */;
- break;
-
- case AR531X_MISC_IRQ_GPIO:
- imr &= ~AR5315_ISR_GPIO;
- break;
-
- case AR531X_MISC_IRQ_UART0:
- imr &= (~AR5315_ISR_UART0);
- break;
-
- case AR531X_MISC_IRQ_WATCHDOG:
- imr &= (~AR5315_ISR_WD);
- break;
-
- case AR531X_MISC_IRQ_LOCAL:
- imr &= ~0/* ?? */;
- break;
-
- }
- sysRegWrite(AR5315_IMR, imr);
- sysRegRead(AR5315_IMR); /* flush write buffer */
-}
-
-/* Turn on the specified AR531X_MISC_IRQ interrupt */
-static unsigned int
-ar5315_misc_intr_startup(unsigned int irq)
-{
- ar5315_misc_intr_enable(irq);
- return 0;
-}
-
-/* Turn off the specified AR531X_MISC_IRQ interrupt */
-static void
-ar5315_misc_intr_shutdown(unsigned int irq)
-{
- ar5315_misc_intr_disable(irq);
-}
-
-static void
-ar5315_misc_intr_ack(unsigned int irq)
-{
- ar5315_misc_intr_disable(irq);
-}
-
-static void
-ar5315_misc_intr_end(unsigned int irq)
-{
- if (!(irq_desc[irq].status & (IRQ_DISABLED | IRQ_INPROGRESS)))
- ar5315_misc_intr_enable(irq);
-}
-
-static struct irq_chip ar5315_misc_intr_controller = {
- .typename = "AR5315 misc",
- .startup = ar5315_misc_intr_startup,
- .shutdown = ar5315_misc_intr_shutdown,
- .enable = ar5315_misc_intr_enable,
- .disable = ar5315_misc_intr_disable,
- .ack = ar5315_misc_intr_ack,
- .end = ar5315_misc_intr_end,
-};
-
-static irqreturn_t ar5315_ahb_proc_handler(int cpl, void *dev_id)
-{
- sysRegWrite(AR5315_AHB_ERR0,AHB_ERROR_DET);
- sysRegRead(AR5315_AHB_ERR1);
-
- printk("AHB fatal error\n");
- machine_restart("AHB error"); /* Catastrophic failure */
-
- return IRQ_HANDLED;
-}
-
-static struct irqaction ar5315_ahb_proc_interrupt = {
- .handler = ar5315_ahb_proc_handler,
- .flags = IRQF_DISABLED,
- .name = "ar5315_ahb_proc_interrupt",
-};
-
-
-static struct irqaction cascade = {
- .handler = no_action,
- .flags = IRQF_DISABLED,
- .name = "cascade",
-};
-
-static void ar5315_gpio_intr_init(int irq_base)
-{
- int i;
-
- for (i = irq_base; i < irq_base + AR531X_GPIO_IRQ_COUNT; i++) {
- irq_desc[i].status = IRQ_DISABLED;
- irq_desc[i].action = NULL;
- irq_desc[i].depth = 1;
- irq_desc[i].chip = &ar5315_gpio_intr_controller;
- }
- setup_irq(AR531X_MISC_IRQ_GPIO, &cascade);
- gpiointval = sysRegRead(AR5315_GPIO_DI);
-}
-
-void ar5315_misc_intr_init(int irq_base)
-{
- int i;
-
- for (i = irq_base; i < irq_base + AR531X_MISC_IRQ_COUNT; i++) {
- irq_desc[i].status = IRQ_DISABLED;
- irq_desc[i].action = NULL;
- irq_desc[i].depth = 1;
- irq_desc[i].chip = &ar5315_misc_intr_controller;
- }
- setup_irq(AR531X_MISC_IRQ_AHB_PROC, &ar5315_ahb_proc_interrupt);
- setup_irq(AR5315_IRQ_MISC_INTRS, &cascade);
- ar5315_gpio_intr_init(AR531X_GPIO_IRQ_BASE);
-}
-
projects / openwrt / svn-archive / archive.git / blobdiff