From 9cd1e4280d92154d8e5ea84d290c785844e35124 Mon Sep 17 00:00:00 2001 From: Mike Baker Date: Thu, 2 Feb 2006 23:38:35 +0000 Subject: split patch; start irq cleanup git-svn-id: svn://svn.openwrt.org/openwrt/trunk/openwrt@3117 3c298f89-4303-0410-b956-a3cf2f4a3e73 --- target/linux/aruba-2.6/patches/002-irq.patch | 488 +++++++++++++++++++++++++++ 1 file changed, 488 insertions(+) create mode 100644 target/linux/aruba-2.6/patches/002-irq.patch (limited to 'target/linux/aruba-2.6/patches/002-irq.patch') diff --git a/target/linux/aruba-2.6/patches/002-irq.patch b/target/linux/aruba-2.6/patches/002-irq.patch new file mode 100644 index 0000000000..d789a2104b --- /dev/null +++ b/target/linux/aruba-2.6/patches/002-irq.patch @@ -0,0 +1,488 @@ +diff -Nur linux-2.6.15/arch/mips/aruba/idtIRQ.S linux-2.6.15-openwrt/arch/mips/aruba/idtIRQ.S +--- linux-2.6.15/arch/mips/aruba/idtIRQ.S 1970-01-01 01:00:00.000000000 +0100 ++++ linux-2.6.15-openwrt/arch/mips/aruba/idtIRQ.S 2006-01-10 00:32:32.000000000 +0100 +@@ -0,0 +1,87 @@ ++/************************************************************************** ++ * ++ * BRIEF MODULE DESCRIPTION ++ * Intterrupt dispatcher code for IDT boards ++ * ++ * Copyright 2004 IDT Inc. (rischelp@idt.com) ++ * ++ * This program is free software; you can redistribute it and/or modify it ++ * under the terms of the GNU General Public License as published by the ++ * Free Software Foundation; either version 2 of the License, or (at your ++ * option) any later version. ++ * ++ * THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESS OR IMPLIED ++ * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF ++ * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN ++ * NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, ++ * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT ++ * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF ++ * USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ++ * ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT ++ * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF ++ * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. ++ * ++ * You should have received a copy of the GNU General Public License along ++ * with this program; if not, write to the Free Software Foundation, Inc., ++ * 675 Mass Ave, Cambridge, MA 02139, USA. ++ * ++ * ++ ************************************************************************** ++ * May 2004 rkt, neb ++ * ++ * Initial Release ++ * ++ * ++ * ++ ************************************************************************** ++ */ ++ ++ ++#include ++#include ++#include ++#include ++ ++ .text ++ .set noreorder ++ .set noat ++ .align 5 ++ NESTED(idtIRQ, PT_SIZE, sp) ++ .set noat ++ SAVE_ALL ++ CLI ++ ++ .set at ++ .set noreorder ++ ++ /* Get the pending interrupts */ ++ mfc0 t0, CP0_CAUSE ++ nop ++ ++ /* Isolate the allowed ones by anding the irq mask */ ++ mfc0 t2, CP0_STATUS ++ move a1, sp /* need a nop here, hence we anticipate */ ++ andi t0, CAUSEF_IP ++ and t0, t2 ++ ++ /* check for r4k counter/timer IRQ. */ ++ ++ andi t1, t0, CAUSEF_IP7 ++ beqz t1, 1f ++ nop ++ ++ jal aruba_timer_interrupt ++ ++ li a0, 7 ++ ++ j ret_from_irq ++ nop ++1: ++ jal aruba_irqdispatch ++ move a0, t0 ++ j ret_from_irq ++ nop ++ ++ END(idtIRQ) ++ ++ +diff -Nur linux-2.6.15/arch/mips/aruba/irq.c linux-2.6.15-openwrt/arch/mips/aruba/irq.c +--- linux-2.6.15/arch/mips/aruba/irq.c 1970-01-01 01:00:00.000000000 +0100 ++++ linux-2.6.15-openwrt/arch/mips/aruba/irq.c 2006-01-10 00:32:32.000000000 +0100 +@@ -0,0 +1,393 @@ ++/************************************************************************** ++ * ++ * BRIEF MODULE DESCRIPTION ++ * Interrupt routines for IDT EB434 boards ++ * ++ * Copyright 2004 IDT Inc. (rischelp@idt.com) ++ * ++ * This program is free software; you can redistribute it and/or modify it ++ * under the terms of the GNU General Public License as published by the ++ * Free Software Foundation; either version 2 of the License, or (at your ++ * option) any later version. ++ * ++ * THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESS OR IMPLIED ++ * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF ++ * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN ++ * NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, ++ * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT ++ * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF ++ * USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ++ * ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT ++ * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF ++ * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. ++ * ++ * You should have received a copy of the GNU General Public License along ++ * with this program; if not, write to the Free Software Foundation, Inc., ++ * 675 Mass Ave, Cambridge, MA 02139, USA. ++ * ++ * ++ ************************************************************************** ++ * May 2004 rkt, neb ++ * ++ * Initial Release ++ * ++ * ++ * ++ ************************************************************************** ++ */ ++ ++#include ++#include ++#include ++#include ++#include ++#include ++#include ++#include ++#include ++#include ++#include ++#include ++#include ++ ++#include ++#include ++#include ++#include ++#include ++#include ++#include ++ ++#include ++ ++#undef DEBUG_IRQ ++#ifdef DEBUG_IRQ ++/* note: prints function name for you */ ++#define DPRINTK(fmt, args...) printk("%s: " fmt, __FUNCTION__ , ## args) ++#else ++#define DPRINTK(fmt, args...) ++#endif ++ ++extern asmlinkage void idtIRQ(void); ++static unsigned int startup_irq(unsigned int irq); ++static void end_irq(unsigned int irq_nr); ++static void mask_and_ack_irq(unsigned int irq_nr); ++static void aruba_enable_irq(unsigned int irq_nr); ++static void aruba_disable_irq(unsigned int irq_nr); ++ ++extern void __init init_generic_irq(void); ++ ++typedef struct { ++ u32 mask; ++ volatile u32 *base_addr; ++} intr_group_t; ++ ++static const intr_group_t intr_group_merlot[NUM_INTR_GROUPS] = { ++ {0xffffffff, (u32 *) KSEG1ADDR(IC_GROUP0_PEND + 0)}, ++}; ++ ++#define READ_PEND_MERLOT(base) (*((volatile unsigned long *)(0xbc003010))) ++#define READ_MASK_MERLOT(base) (*((volatile unsigned long *)(0xbc003010 + 4))) ++#define WRITE_MASK_MERLOT(base, val) ((*((volatile unsigned long *)((0xbc003010) + 4))) = (val)) ++ ++static const intr_group_t intr_group_muscat[NUM_INTR_GROUPS] = { ++ {0x0000efff, (u32 *) KSEG1ADDR(IC_GROUP0_PEND + 0 * IC_GROUP_OFFSET)}, ++ {0x00001fff, (u32 *) KSEG1ADDR(IC_GROUP0_PEND + 1 * IC_GROUP_OFFSET)}, ++ {0x00000007, (u32 *) KSEG1ADDR(IC_GROUP0_PEND + 2 * IC_GROUP_OFFSET)}, ++ {0x0003ffff, (u32 *) KSEG1ADDR(IC_GROUP0_PEND + 3 * IC_GROUP_OFFSET)}, ++ {0xffffffff, (u32 *) KSEG1ADDR(IC_GROUP0_PEND + 4 * IC_GROUP_OFFSET)} ++}; ++ ++#define READ_PEND_MUSCAT(base) (*(base)) ++#define READ_MASK_MUSCAT(base) (*(base + 2)) ++#define WRITE_MASK_MUSCAT(base, val) (*(base + 2) = (val)) ++ ++static inline int irq_to_group(unsigned int irq_nr) ++{ ++ switch (mips_machtype) { ++ case MACH_ARUBA_AP70: ++ return ((irq_nr - GROUP0_IRQ_BASE) >> 5); ++ case MACH_ARUBA_AP65: ++ case MACH_ARUBA_AP60: ++ default: ++ return 0; ++ } ++} ++ ++static inline int group_to_ip(unsigned int group) ++{ ++ switch (mips_machtype) { ++ case MACH_ARUBA_AP70: ++ return group + 2; ++ case MACH_ARUBA_AP65: ++ case MACH_ARUBA_AP60: ++ default: ++ return 6; ++ } ++} ++ ++static inline void enable_local_irq(unsigned int ip) ++{ ++ int ipnum = 0x100 << ip; ++ clear_c0_cause(ipnum); ++ set_c0_status(ipnum); ++} ++ ++static inline void disable_local_irq(unsigned int ip) ++{ ++ int ipnum = 0x100 << ip; ++ clear_c0_status(ipnum); ++} ++ ++static inline void ack_local_irq(unsigned int ip) ++{ ++ int ipnum = 0x100 << ip; ++ clear_c0_cause(ipnum); ++} ++ ++static void aruba_enable_irq(unsigned int irq_nr) ++{ ++ int ip = irq_nr - GROUP0_IRQ_BASE; ++ unsigned int group, intr_bit; ++ volatile unsigned int *addr; ++ if (ip < 0) { ++ enable_local_irq(irq_nr); ++ } else { ++ // calculate group ++ switch (mips_machtype) { ++ case MACH_ARUBA_AP70: ++ group = ip >> 5; ++ break; ++ case MACH_ARUBA_AP65: ++ case MACH_ARUBA_AP60: ++ default: ++ group = 0; ++ break; ++ } ++ ++ // calc interrupt bit within group ++ ip -= (group << 5); ++ intr_bit = 1 << ip; ++ ++ // first enable the IP mapped to this IRQ ++ enable_local_irq(group_to_ip(group)); ++ ++ switch (mips_machtype) { ++ case MACH_ARUBA_AP70: ++ addr = intr_group_muscat[group].base_addr; ++ // unmask intr within group ++ WRITE_MASK_MUSCAT(addr, READ_MASK_MUSCAT(addr) & ~intr_bit); ++ break; ++ case MACH_ARUBA_AP65: ++ case MACH_ARUBA_AP60: ++ default: ++ addr = intr_group_merlot[group].base_addr; ++ WRITE_MASK_MERLOT(addr, READ_MASK_MERLOT(addr) | intr_bit); ++ break; ++ } ++ } ++} ++ ++static void aruba_disable_irq(unsigned int irq_nr) ++{ ++ int ip = irq_nr - GROUP0_IRQ_BASE; ++ unsigned int group, intr_bit, mask; ++ volatile unsigned int *addr; ++ ++ // calculate group ++ switch (mips_machtype) { ++ case MACH_ARUBA_AP70: ++ group = ip >> 5; ++ break; ++ case MACH_ARUBA_AP65: ++ case MACH_ARUBA_AP60: ++ default: ++ group = 0; ++ break; ++ } ++ ++ // calc interrupt bit within group ++ ip -= group << 5; ++ intr_bit = 1 << ip; ++ ++ switch (mips_machtype) { ++ case MACH_ARUBA_AP70: ++ addr = intr_group_muscat[group].base_addr; ++ // mask intr within group ++ mask = READ_MASK_MUSCAT(addr); ++ mask |= intr_bit; ++ WRITE_MASK_MUSCAT(addr, mask); ++ ++ /* ++ if there are no more interrupts enabled in this ++ group, disable corresponding IP ++ */ ++ if (mask == intr_group_muscat[group].mask) ++ disable_local_irq(group_to_ip(group)); ++ break; ++ case MACH_ARUBA_AP65: ++ case MACH_ARUBA_AP60: ++ default: ++ addr = intr_group_merlot[group].base_addr; ++ // mask intr within group ++ mask = READ_MASK_MERLOT(addr); ++ mask &= ~intr_bit; ++ WRITE_MASK_MERLOT(addr, mask); ++ if (!mask) ++ disable_local_irq(group_to_ip(group)); ++ break; ++ } ++} ++ ++static unsigned int startup_irq(unsigned int irq_nr) ++{ ++ aruba_enable_irq(irq_nr); ++ return 0; ++} ++ ++static void shutdown_irq(unsigned int irq_nr) ++{ ++ aruba_disable_irq(irq_nr); ++ return; ++} ++ ++static void mask_and_ack_irq(unsigned int irq_nr) ++{ ++ aruba_disable_irq(irq_nr); ++ ack_local_irq(group_to_ip(irq_to_group(irq_nr))); ++} ++ ++static void end_irq(unsigned int irq_nr) ++{ ++ ++ int ip = irq_nr - GROUP0_IRQ_BASE; ++ unsigned int intr_bit, group; ++ volatile unsigned int *addr; ++ ++ if (irq_desc[irq_nr].status & (IRQ_DISABLED | IRQ_INPROGRESS)) { ++ printk("warning: end_irq %d did not enable (%x)\n", ++ irq_nr, irq_desc[irq_nr].status); ++ } ++ ++ switch (mips_machtype) { ++ case MACH_ARUBA_AP70: ++ if (irq_nr == GROUP4_IRQ_BASE + 9) idt_gpio->gpioistat &= 0xfffffdff; ++ else if (irq_nr == GROUP4_IRQ_BASE + 10) idt_gpio->gpioistat &= 0xfffffbff; ++ else if (irq_nr == GROUP4_IRQ_BASE + 11) idt_gpio->gpioistat &= 0xfffff7ff; ++ else if (irq_nr == GROUP4_IRQ_BASE + 12) idt_gpio->gpioistat &= 0xffffefff; ++ ++ group = ip >> 5; ++ ++ // calc interrupt bit within group ++ ip -= (group << 5); ++ intr_bit = 1 << ip; ++ ++ // first enable the IP mapped to this IRQ ++ enable_local_irq(group_to_ip(group)); ++ ++ addr = intr_group_muscat[group].base_addr; ++ // unmask intr within group ++ WRITE_MASK_MUSCAT(addr, READ_MASK_MUSCAT(addr) & ~intr_bit); ++ break; ++ case MACH_ARUBA_AP65: ++ case MACH_ARUBA_AP60: ++ group = 0; ++ ++ // calc interrupt bit within group ++ intr_bit = 1 << ip; ++ ++ // first enable the IP mapped to this IRQ ++ enable_local_irq(group_to_ip(group)); ++ ++ addr = intr_group_merlot[group].base_addr; ++ // unmask intr within group ++ WRITE_MASK_MERLOT(addr, READ_MASK_MERLOT(addr) | intr_bit); ++ break; ++ } ++} ++ ++static struct hw_interrupt_type aruba_irq_type = { ++ .typename = "IDT434", ++ .startup = startup_irq, ++ .shutdown = shutdown_irq, ++ .enable = aruba_enable_irq, ++ .disable = aruba_disable_irq, ++ .ack = mask_and_ack_irq, ++ .end = end_irq, ++}; ++ ++void __init arch_init_irq(void) ++{ ++ int i; ++ printk("Initializing IRQ's: %d out of %d\n", RC32434_NR_IRQS, NR_IRQS); ++ memset(irq_desc, 0, sizeof(irq_desc)); ++ set_except_vector(0, idtIRQ); ++ ++ for (i = 0; i < RC32434_NR_IRQS; i++) { ++ irq_desc[i].status = IRQ_DISABLED; ++ irq_desc[i].action = NULL; ++ irq_desc[i].depth = 1; ++ irq_desc[i].handler = &aruba_irq_type; ++ spin_lock_init(&irq_desc[i].lock); ++ } ++ ++ switch (mips_machtype) { ++ case MACH_ARUBA_AP70: ++ break; ++ case MACH_ARUBA_AP65: ++ case MACH_ARUBA_AP60: ++ default: ++ WRITE_MASK_MERLOT(intr_group_merlot[0].base_addr, 0); ++ *((volatile unsigned long *)0xbc003014) = 0x10; ++ break; ++ } ++} ++ ++/* Main Interrupt dispatcher */ ++void aruba_irqdispatch(unsigned long cp0_cause, struct pt_regs *regs) ++{ ++ unsigned int pend, group, ip; ++ volatile unsigned int *addr; ++ switch (mips_machtype) { ++ case MACH_ARUBA_AP70: ++ if ((ip = (cp0_cause & 0x7c00))) { ++ group = 21 - rc32434_clz(ip); ++ ++ addr = intr_group_muscat[group].base_addr; ++ ++ pend = READ_PEND_MUSCAT(addr); ++ pend &= ~READ_MASK_MUSCAT(addr); // only unmasked interrupts ++ pend = 39 - rc32434_clz(pend); ++ do_IRQ((group << 5) + pend, regs); ++ } ++ break; ++ case MACH_ARUBA_AP65: ++ case MACH_ARUBA_AP60: ++ default: ++ if (cp0_cause & 0x4000) { ++ // Misc Interrupt ++ group = 0; ++ addr = intr_group_merlot[group].base_addr; ++ pend = READ_PEND_MERLOT(addr); ++ pend &= READ_MASK_MERLOT(addr); // only unmasked interrupts ++ /* handle one misc interrupt at a time */ ++ while (pend) { ++ unsigned int intr_bit, irq_nr; ++ intr_bit = pend ^ (pend - 1); ++ irq_nr = ((31 - rc32434_clz(pend)) + GROUP0_IRQ_BASE); ++ do_IRQ(irq_nr, regs); ++ pend &= ~intr_bit; ++ } ++ } ++ if (cp0_cause & 0x3c00) { ++ while (cp0_cause) { ++ unsigned int intr_bit, irq_nr; ++ intr_bit = cp0_cause ^ (cp0_cause - 1); ++ irq_nr = ((31 - rc32434_clz(cp0_cause)) - GROUP0_IRQ_BASE); ++ do_IRQ(irq_nr, regs); ++ cp0_cause &= ~intr_bit; ++ } ++ } ++ break; ++ } ++} -- cgit v1.2.3