X-Git-Url: https://git.rohieb.name/openwrt.git/blobdiff_plain/421f90df8a08202057ef01697edf930f2fabd764..92d5f8813fd489b665d5012900de7adbae6ed505:/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 index 308c39903..cc5ea84c4 100644 --- a/target/linux/aruba-2.6/patches/002-irq.patch +++ b/target/linux/aruba-2.6/patches/002-irq.patch @@ -1,136 +1,7 @@ -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 +1,424 @@ -+/************************************************************************** -+ * -+ * 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 -+ * -+ * -+ * -+ ************************************************************************** -+ */ -+ +diff -Nur linux-2.6.17/arch/mips/aruba/irq.c linux-2.6.17-openwrt/arch/mips/aruba/irq.c +--- linux-2.6.17/arch/mips/aruba/irq.c 1970-01-01 01:00:00.000000000 +0100 ++++ linux-2.6.17-openwrt/arch/mips/aruba/irq.c 2006-10-12 14:32:40.026285000 -0700 +@@ -0,0 +1,285 @@ +#include +#include +#include @@ -155,22 +26,7 @@ diff -Nur linux-2.6.15/arch/mips/aruba/irq.c linux-2.6.15-openwrt/arch/mips/arub + +#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); ++extern void aruba_timer_interrupt(struct pt_regs *regs); + +typedef struct { + u32 mask; @@ -178,12 +34,12 @@ diff -Nur linux-2.6.15/arch/mips/aruba/irq.c linux-2.6.15-openwrt/arch/mips/arub +} intr_group_t; + +static const intr_group_t intr_group_merlot[NUM_INTR_GROUPS] = { -+ {0xffffffff, (u32 *) KSEG1ADDR(IC_GROUP0_PEND + 0)}, ++ {0x00000000, (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)) ++#define READ_MASK_MERLOT(base) (*((volatile unsigned long *)(0xbc003014))) ++#define WRITE_MASK_MERLOT(base, val) ((*((volatile unsigned long *)(0xbc003014))) = (val), READ_MASK_MERLOT()) + +static const intr_group_t intr_group_muscat[NUM_INTR_GROUPS] = { + {0x0000efff, (u32 *) KSEG1ADDR(IC_GROUP0_PEND + 0 * IC_GROUP_OFFSET)}, @@ -197,18 +53,6 @@ diff -Nur linux-2.6.15/arch/mips/aruba/irq.c linux-2.6.15-openwrt/arch/mips/arub +#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) { @@ -221,222 +65,149 @@ diff -Nur linux-2.6.15/arch/mips/aruba/irq.c linux-2.6.15-openwrt/arch/mips/arub + } +} + -+static inline void enable_local_irq(unsigned int ip) ++static inline void enable_local_irq(unsigned int irq) +{ -+ int ipnum = 0x100 << ip; -+ clear_c0_cause(ipnum); -+ set_c0_status(ipnum); ++ clear_c0_cause(0x100 << irq); ++ set_c0_status(0x100 << irq); ++ irq_enable_hazard(); +} + -+static inline void disable_local_irq(unsigned int ip) ++static inline void disable_local_irq(unsigned int irq) +{ -+ int ipnum = 0x100 << ip; -+ clear_c0_status(ipnum); ++ clear_c0_status(0x100 << irq); ++ clear_c0_cause(0x100 << irq); ++ irq_disable_hazard(); +} + -+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) ++static inline void aruba_irq_enable(unsigned int irq) +{ + unsigned long flags; -+ int ip = irq_nr - GROUP0_IRQ_BASE; -+ unsigned int group, intr_bit; -+ volatile unsigned int *addr; -+ ++ unsigned int group, intr_bit; ++ volatile unsigned int *addr; + + local_irq_save(flags); -+ -+ if (ip < 0) { -+ enable_local_irq(irq_nr); ++ ++ if (irq < GROUP0_IRQ_BASE) { ++ enable_local_irq(irq); + } else { -+ // calculate group ++ int ip = irq - GROUP0_IRQ_BASE; + 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; ++ if (irq >= GROUP4_IRQ_BASE) ++ idt_gpio->gpioistat &= ~(1 << (irq - GROUP4_IRQ_BASE)); + -+ // first enable the IP mapped to this IRQ -+ enable_local_irq(group_to_ip(group)); ++ // irqs are in groups of 32 ++ // ip is set to the remainder ++ group = ip >> 5; ++ ip &= 0x1f; + -+ switch (mips_machtype) { -+ case MACH_ARUBA_AP70: ++ // bit -> 0 = unmask ++ intr_bit = 1 << ip; + 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: ++ group = 0; ++ ++ // bit -> 1 = unmasked ++ intr_bit = 1 << ip; + addr = intr_group_merlot[group].base_addr; + WRITE_MASK_MERLOT(addr, READ_MASK_MERLOT(addr) | intr_bit); + break; + } ++ enable_local_irq(group_to_ip(group)); + } + ++ back_to_back_c0_hazard(); + local_irq_restore(flags); -+ +} + -+static void aruba_disable_irq(unsigned int irq_nr) ++static void aruba_irq_disable(unsigned int irq) +{ + unsigned long flags; -+ int ip = irq_nr - GROUP0_IRQ_BASE; -+ unsigned int group, intr_bit, mask; -+ volatile unsigned int *addr; ++ unsigned int group, intr_bit, mask; ++ volatile unsigned int *addr; + + local_irq_save(flags); + -+ if (ip < 0) { -+ disable_local_irq(irq_nr); ++ if (irq < GROUP0_IRQ_BASE) { ++ disable_local_irq(irq); + } else { -+ // calculate group ++ int ip = irq - GROUP0_IRQ_BASE; + switch (mips_machtype) { + case MACH_ARUBA_AP70: -+ group = ip >> 5; -+ break; -+ case MACH_ARUBA_AP65: -+ case MACH_ARUBA_AP60: -+ default: -+ group = 0; -+ break; -+ } ++ idt_gpio->gpioistat &= ~(1 << ip); + -+ // calc interrupt bit within group -+ ip -= group << 5; -+ intr_bit = 1 << ip; ++ // irqs are in groups of 32 ++ // ip is set to the remainder ++ group = ip >> 5; ++ ip &= 0x1f; + -+ switch (mips_machtype) { -+ case MACH_ARUBA_AP70: ++ // bit -> 1 = mask ++ intr_bit = 1 << ip; + 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) ++ ++ if (mask == intr_group_muscat[group].mask) { + disable_local_irq(group_to_ip(group)); ++ } + break; ++ + case MACH_ARUBA_AP65: + case MACH_ARUBA_AP60: -+ default: ++ group = 0; ++ ++ // bit -> 0 = masked ++ intr_bit = 1 << ip; + 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) ++ ++ if (mask == intr_group_merlot[group].mask) { + disable_local_irq(group_to_ip(group)); ++ } + break; + } + } + ++ back_to_back_c0_hazard(); + local_irq_restore(flags); -+ +} + -+static unsigned int startup_irq(unsigned int irq_nr) ++static unsigned int aruba_irq_startup(unsigned int irq) +{ -+ aruba_enable_irq(irq_nr); ++ aruba_irq_enable(irq); + return 0; +} + -+static void shutdown_irq(unsigned int irq_nr) -+{ -+ aruba_disable_irq(irq_nr); -+ return; -+} ++#define aruba_irq_shutdown aruba_irq_disable + -+static void mask_and_ack_irq(unsigned int irq_nr) ++static void aruba_irq_ack(unsigned int irq) +{ -+ aruba_disable_irq(irq_nr); -+ ack_local_irq(group_to_ip(irq_to_group(irq_nr))); ++ aruba_irq_disable(irq); +} + -+static void end_irq(unsigned int irq_nr) ++static void aruba_irq_end(unsigned int irq) +{ -+ -+ unsigned long flags; -+ int ip = irq_nr - GROUP0_IRQ_BASE; -+ unsigned int intr_bit, group; -+ volatile unsigned int *addr; -+ -+ -+ local_irq_save(flags); -+ if (irq_desc[irq_nr].status & (IRQ_DISABLED | IRQ_INPROGRESS)) { -+ printk("warning: end_irq %d did not enable (%x) (ignoring)\n", -+ irq_nr, irq_desc[irq_nr].status); -+ } -+ -+ if (ip<0) { -+ enable_local_irq(irq_nr); -+ } else { -+ -+ 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; -+ } -+ } -+ local_irq_restore(flags); ++ if (!(irq_desc[irq].status & (IRQ_DISABLED | IRQ_INPROGRESS))) ++ aruba_irq_enable(irq); +} + +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, ++ .typename = "ARUBA", ++ .startup = aruba_irq_startup, ++ .shutdown = aruba_irq_shutdown, ++ .enable = aruba_irq_enable, ++ .disable = aruba_irq_disable, ++ .ack = aruba_irq_ack, ++ .end = aruba_irq_end, +}; + +void __init arch_init_irq(void) @@ -444,36 +215,44 @@ diff -Nur linux-2.6.15/arch/mips/aruba/irq.c linux-2.6.15-openwrt/arch/mips/arub + 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); -+ -+ -+ set_c0_status(0xFF00); + + 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; ++ irq_desc[i].chip = &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) ++ ++void plat_irq_dispatch(struct pt_regs *regs) +{ + unsigned int pend, group, ip; + volatile unsigned int *addr; ++ unsigned long cp0_cause = read_c0_cause() & read_c0_status() & CAUSEF_IP; ++ ++ if (cp0_cause & CAUSEF_IP7) ++ return aruba_timer_interrupt(regs); ++ ++ if(cp0_cause == 0) { ++ printk("INTERRUPT(S) FIRED WHILE MASKED\n"); ++#ifdef ARUBA_DEBUG ++ // debuging use -- figure out which interrupt(s) fired ++ cp0_cause = read_c0_cause() & CAUSEF_IP; ++ while (cp0_cause) { ++ unsigned long intr_bit; ++ unsigned int irq_nr; ++ intr_bit = (31 - rc32434_clz(cp0_cause)); ++ irq_nr = intr_bit - GROUP0_IRQ_BASE; ++ printk(" ---> MASKED IRQ %d\n",irq_nr); ++ cp0_cause &= ~(1 << intr_bit); ++ } ++#endif ++ return; ++ } ++ + switch (mips_machtype) { + case MACH_ARUBA_AP70: + if ((ip = (cp0_cause & 0x7c00))) { @@ -482,37 +261,28 @@ diff -Nur linux-2.6.15/arch/mips/aruba/irq.c linux-2.6.15-openwrt/arch/mips/arub + addr = intr_group_muscat[group].base_addr; + + pend = READ_PEND_MUSCAT(addr); -+ pend &= ~READ_MASK_MUSCAT(addr); // only unmasked interrupts ++ pend &= ~READ_MASK_MUSCAT(addr); // only unmasked interrupts + pend = 39 - rc32434_clz(pend); -+ do_IRQ((group << 5) + pend, regs); ++ do_IRQ(pend + (group << 5)); + } + break; + case MACH_ARUBA_AP65: + case MACH_ARUBA_AP60: + default: -+ if (cp0_cause & 0x4000) { ++ if (cp0_cause & 0x4000) { // 1 << (8 +6) == irq 6 + // 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; -+ } ++ pend = 31 - rc32434_clz(pend); ++ do_IRQ(pend + GROUP0_IRQ_BASE); + } -+ 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; -+ } ++ if ((ip = (cp0_cause & 0x3c00))) { // irq 2-5 ++ pend = 31 - rc32434_clz(ip); ++ do_IRQ(pend - GROUP0_IRQ_BASE); + } + break; + }