diff options
Diffstat (limited to 'arch/ppc/syslib/mv64360_pic.c')
| -rw-r--r-- | arch/ppc/syslib/mv64360_pic.c | 423 |
1 files changed, 0 insertions, 423 deletions
diff --git a/arch/ppc/syslib/mv64360_pic.c b/arch/ppc/syslib/mv64360_pic.c deleted file mode 100644 index 2dd2dc5cd404..000000000000 --- a/arch/ppc/syslib/mv64360_pic.c +++ /dev/null @@ -1,423 +0,0 @@ -/* - * Interrupt controller support for Marvell's MV64360. - * - * Author: Rabeeh Khoury <rabeeh@galileo.co.il> - * Based on MV64360 PIC written by - * Chris Zankel <chris@mvista.com> - * Mark A. Greer <mgreer@mvista.com> - * - * Copyright 2004 MontaVista Software, Inc. - * - * 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 file contains the specific functions to support the MV64360 - * interrupt controller. - * - * The MV64360 has two main interrupt registers (high and low) that - * summarizes the interrupts generated by the units of the MV64360. - * Each bit is assigned to an interrupt number, where the low register - * are assigned from IRQ0 to IRQ31 and the high cause register - * from IRQ32 to IRQ63 - * The GPP (General Purpose Pins) interrupts are assigned from IRQ64 (GPP0) - * to IRQ95 (GPP31). - * get_irq() returns the lowest interrupt number that is currently asserted. - * - * Note: - * - This driver does not initialize the GPP when used as an interrupt - * input. - */ - -#include <linux/stddef.h> -#include <linux/init.h> -#include <linux/sched.h> -#include <linux/signal.h> -#include <linux/delay.h> -#include <linux/irq.h> -#include <linux/interrupt.h> - -#include <asm/io.h> -#include <asm/processor.h> -#include <asm/system.h> -#include <asm/irq.h> -#include <asm/mv64x60.h> -#include <asm/machdep.h> - -#ifdef CONFIG_IRQ_ALL_CPUS -#error "The mv64360 does not support distribution of IRQs on all CPUs" -#endif -/* ========================== forward declaration ========================== */ - -static void mv64360_unmask_irq(unsigned int); -static void mv64360_mask_irq(unsigned int); -static irqreturn_t mv64360_cpu_error_int_handler(int, void *); -static irqreturn_t mv64360_sram_error_int_handler(int, void *); -static irqreturn_t mv64360_pci_error_int_handler(int, void *); - -/* ========================== local declarations =========================== */ - -struct hw_interrupt_type mv64360_pic = { - .typename = " mv64360 ", - .enable = mv64360_unmask_irq, - .disable = mv64360_mask_irq, - .ack = mv64360_mask_irq, - .end = mv64360_unmask_irq, -}; - -#define CPU_INTR_STR "mv64360 cpu interface error" -#define SRAM_INTR_STR "mv64360 internal sram error" -#define PCI0_INTR_STR "mv64360 pci 0 error" -#define PCI1_INTR_STR "mv64360 pci 1 error" - -static struct mv64x60_handle bh; - -u32 mv64360_irq_base = 0; /* MV64360 handles the next 96 IRQs from here */ - -/* mv64360_init_irq() - * - * This function initializes the interrupt controller. It assigns - * all interrupts from IRQ0 to IRQ95 to the mv64360 interrupt controller. - * - * Input Variable(s): - * None. - * - * Outpu. Variable(s): - * None. - * - * Returns: - * void - * - * Note: - * We register all GPP inputs as interrupt source, but disable them. - */ -void __init -mv64360_init_irq(void) -{ - int i; - - if (ppc_md.progress) - ppc_md.progress("mv64360_init_irq: enter", 0x0); - - bh.v_base = mv64x60_get_bridge_vbase(); - - ppc_cached_irq_mask[0] = 0; - ppc_cached_irq_mask[1] = 0x0f000000; /* Enable GPP intrs */ - ppc_cached_irq_mask[2] = 0; - - /* disable all interrupts and clear current interrupts */ - mv64x60_write(&bh, MV64x60_GPP_INTR_CAUSE, 0); - mv64x60_write(&bh, MV64x60_GPP_INTR_MASK, ppc_cached_irq_mask[2]); - mv64x60_write(&bh, MV64360_IC_CPU0_INTR_MASK_LO,ppc_cached_irq_mask[0]); - mv64x60_write(&bh, MV64360_IC_CPU0_INTR_MASK_HI,ppc_cached_irq_mask[1]); - - /* All interrupts are level interrupts */ - for (i = mv64360_irq_base; i < (mv64360_irq_base + 96); i++) { - irq_desc[i].status |= IRQ_LEVEL; - irq_desc[i].chip = &mv64360_pic; - } - - if (ppc_md.progress) - ppc_md.progress("mv64360_init_irq: exit", 0x0); -} - -/* mv64360_get_irq() - * - * This function returns the lowest interrupt number of all interrupts that - * are currently asserted. - * - * Output Variable(s): - * None. - * - * Returns: - * int <interrupt number> or -2 (bogus interrupt) - * - */ -int -mv64360_get_irq(void) -{ - int irq; - int irq_gpp; - -#ifdef CONFIG_SMP - /* - * Second CPU gets only doorbell (message) interrupts. - * The doorbell interrupt is BIT28 in the main interrupt low cause reg. - */ - int cpu_nr = smp_processor_id(); - if (cpu_nr == 1) { - if (!(mv64x60_read(&bh, MV64360_IC_MAIN_CAUSE_LO) & - (1 << MV64x60_IRQ_DOORBELL))) - return -1; - return mv64360_irq_base + MV64x60_IRQ_DOORBELL; - } -#endif - - irq = mv64x60_read(&bh, MV64360_IC_MAIN_CAUSE_LO); - irq = __ilog2((irq & 0x3dfffffe) & ppc_cached_irq_mask[0]); - - if (irq == -1) { - irq = mv64x60_read(&bh, MV64360_IC_MAIN_CAUSE_HI); - irq = __ilog2((irq & 0x1f0003f7) & ppc_cached_irq_mask[1]); - - if (irq == -1) - irq = -2; /* bogus interrupt, should never happen */ - else { - if ((irq >= 24) && (irq < MV64x60_IRQ_DOORBELL)) { - irq_gpp = mv64x60_read(&bh, - MV64x60_GPP_INTR_CAUSE); - irq_gpp = __ilog2(irq_gpp & - ppc_cached_irq_mask[2]); - - if (irq_gpp == -1) - irq = -2; - else { - irq = irq_gpp + 64; - mv64x60_write(&bh, - MV64x60_GPP_INTR_CAUSE, - ~(1 << (irq - 64))); - } - } - else - irq += 32; - } - } - - (void)mv64x60_read(&bh, MV64x60_GPP_INTR_CAUSE); - - if (irq < 0) - return (irq); - else - return (mv64360_irq_base + irq); -} - -/* mv64360_unmask_irq() - * - * This function enables an interrupt. - * - * Input Variable(s): - * unsigned int interrupt number (IRQ0...IRQ95). - * - * Output Variable(s): - * None. - * - * Returns: - * void - */ -static void -mv64360_unmask_irq(unsigned int irq) -{ -#ifdef CONFIG_SMP - /* second CPU gets only doorbell interrupts */ - if ((irq - mv64360_irq_base) == MV64x60_IRQ_DOORBELL) { - mv64x60_set_bits(&bh, MV64360_IC_CPU1_INTR_MASK_LO, - (1 << MV64x60_IRQ_DOORBELL)); - return; - } -#endif - irq -= mv64360_irq_base; - - if (irq > 31) { - if (irq > 63) /* unmask GPP irq */ - mv64x60_write(&bh, MV64x60_GPP_INTR_MASK, - ppc_cached_irq_mask[2] |= (1 << (irq - 64))); - else /* mask high interrupt register */ - mv64x60_write(&bh, MV64360_IC_CPU0_INTR_MASK_HI, - ppc_cached_irq_mask[1] |= (1 << (irq - 32))); - } - else /* mask low interrupt register */ - mv64x60_write(&bh, MV64360_IC_CPU0_INTR_MASK_LO, - ppc_cached_irq_mask[0] |= (1 << irq)); - - (void)mv64x60_read(&bh, MV64x60_GPP_INTR_MASK); - return; -} - -/* mv64360_mask_irq() - * - * This function disables the requested interrupt. - * - * Input Variable(s): - * unsigned int interrupt number (IRQ0...IRQ95). - * - * Output Variable(s): - * None. - * - * Returns: - * void - */ -static void -mv64360_mask_irq(unsigned int irq) -{ -#ifdef CONFIG_SMP - if ((irq - mv64360_irq_base) == MV64x60_IRQ_DOORBELL) { - mv64x60_clr_bits(&bh, MV64360_IC_CPU1_INTR_MASK_LO, - (1 << MV64x60_IRQ_DOORBELL)); - return; - } -#endif - irq -= mv64360_irq_base; - - if (irq > 31) { - if (irq > 63) /* mask GPP irq */ - mv64x60_write(&bh, MV64x60_GPP_INTR_MASK, - ppc_cached_irq_mask[2] &= ~(1 << (irq - 64))); - else /* mask high interrupt register */ - mv64x60_write(&bh, MV64360_IC_CPU0_INTR_MASK_HI, - ppc_cached_irq_mask[1] &= ~(1 << (irq - 32))); - } - else /* mask low interrupt register */ - mv64x60_write(&bh, MV64360_IC_CPU0_INTR_MASK_LO, - ppc_cached_irq_mask[0] &= ~(1 << irq)); - - (void)mv64x60_read(&bh, MV64x60_GPP_INTR_MASK); - return; -} - -static irqreturn_t -mv64360_cpu_error_int_handler(int irq, void *dev_id) -{ - printk(KERN_ERR "mv64360_cpu_error_int_handler: %s 0x%08x\n", - "Error on CPU interface - Cause regiser", - mv64x60_read(&bh, MV64x60_CPU_ERR_CAUSE)); - printk(KERN_ERR "\tCPU error register dump:\n"); - printk(KERN_ERR "\tAddress low 0x%08x\n", - mv64x60_read(&bh, MV64x60_CPU_ERR_ADDR_LO)); - printk(KERN_ERR "\tAddress high 0x%08x\n", - mv64x60_read(&bh, MV64x60_CPU_ERR_ADDR_HI)); - printk(KERN_ERR "\tData low 0x%08x\n", - mv64x60_read(&bh, MV64x60_CPU_ERR_DATA_LO)); - printk(KERN_ERR "\tData high 0x%08x\n", - mv64x60_read(&bh, MV64x60_CPU_ERR_DATA_HI)); - printk(KERN_ERR "\tParity 0x%08x\n", - mv64x60_read(&bh, MV64x60_CPU_ERR_PARITY)); - mv64x60_write(&bh, MV64x60_CPU_ERR_CAUSE, 0); - return IRQ_HANDLED; -} - -static irqreturn_t -mv64360_sram_error_int_handler(int irq, void *dev_id) -{ - printk(KERN_ERR "mv64360_sram_error_int_handler: %s 0x%08x\n", - "Error in internal SRAM - Cause register", - mv64x60_read(&bh, MV64360_SRAM_ERR_CAUSE)); - printk(KERN_ERR "\tSRAM error register dump:\n"); - printk(KERN_ERR "\tAddress Low 0x%08x\n", - mv64x60_read(&bh, MV64360_SRAM_ERR_ADDR_LO)); - printk(KERN_ERR "\tAddress High 0x%08x\n", - mv64x60_read(&bh, MV64360_SRAM_ERR_ADDR_HI)); - printk(KERN_ERR "\tData Low 0x%08x\n", - mv64x60_read(&bh, MV64360_SRAM_ERR_DATA_LO)); - printk(KERN_ERR "\tData High 0x%08x\n", - mv64x60_read(&bh, MV64360_SRAM_ERR_DATA_HI)); - printk(KERN_ERR "\tParity 0x%08x\n", - mv64x60_read(&bh, MV64360_SRAM_ERR_PARITY)); - mv64x60_write(&bh, MV64360_SRAM_ERR_CAUSE, 0); - return IRQ_HANDLED; -} - -static irqreturn_t -mv64360_pci_error_int_handler(int irq, void *dev_id) -{ - u32 val; - unsigned int pci_bus = (unsigned int)dev_id; - - if (pci_bus == 0) { /* Error on PCI 0 */ - val = mv64x60_read(&bh, MV64x60_PCI0_ERR_CAUSE); - printk(KERN_ERR "%s: Error in PCI %d Interface\n", - "mv64360_pci_error_int_handler", pci_bus); - printk(KERN_ERR "\tPCI %d error register dump:\n", pci_bus); - printk(KERN_ERR "\tCause register 0x%08x\n", val); - printk(KERN_ERR "\tAddress Low 0x%08x\n", - mv64x60_read(&bh, MV64x60_PCI0_ERR_ADDR_LO)); - printk(KERN_ERR "\tAddress High 0x%08x\n", - mv64x60_read(&bh, MV64x60_PCI0_ERR_ADDR_HI)); - printk(KERN_ERR "\tAttribute 0x%08x\n", - mv64x60_read(&bh, MV64x60_PCI0_ERR_DATA_LO)); - printk(KERN_ERR "\tCommand 0x%08x\n", - mv64x60_read(&bh, MV64x60_PCI0_ERR_CMD)); - mv64x60_write(&bh, MV64x60_PCI0_ERR_CAUSE, ~val); - } - if (pci_bus == 1) { /* Error on PCI 1 */ - val = mv64x60_read(&bh, MV64x60_PCI1_ERR_CAUSE); - printk(KERN_ERR "%s: Error in PCI %d Interface\n", - "mv64360_pci_error_int_handler", pci_bus); - printk(KERN_ERR "\tPCI %d error register dump:\n", pci_bus); - printk(KERN_ERR "\tCause register 0x%08x\n", val); - printk(KERN_ERR "\tAddress Low 0x%08x\n", - mv64x60_read(&bh, MV64x60_PCI1_ERR_ADDR_LO)); - printk(KERN_ERR "\tAddress High 0x%08x\n", - mv64x60_read(&bh, MV64x60_PCI1_ERR_ADDR_HI)); - printk(KERN_ERR "\tAttribute 0x%08x\n", - mv64x60_read(&bh, MV64x60_PCI1_ERR_DATA_LO)); - printk(KERN_ERR "\tCommand 0x%08x\n", - mv64x60_read(&bh, MV64x60_PCI1_ERR_CMD)); - mv64x60_write(&bh, MV64x60_PCI1_ERR_CAUSE, ~val); - } - return IRQ_HANDLED; -} - -/* - * Bit 0 of MV64x60_PCIx_ERR_MASK does not exist on the 64360 and because of - * errata FEr-#11 and FEr-##16 for the 64460, it should be 0 on that chip as - * well. IOW, don't set bit 0. - */ -#define MV64360_PCI0_ERR_MASK_VAL 0x00a50c24 - -static int __init -mv64360_register_hdlrs(void) -{ - int rc; - - /* Clear old errors and register CPU interface error intr handler */ - mv64x60_write(&bh, MV64x60_CPU_ERR_CAUSE, 0); - if ((rc = request_irq(MV64x60_IRQ_CPU_ERR + mv64360_irq_base, - mv64360_cpu_error_int_handler, IRQF_DISABLED, CPU_INTR_STR, NULL))) - printk(KERN_WARNING "Can't register cpu error handler: %d", rc); - - mv64x60_write(&bh, MV64x60_CPU_ERR_MASK, 0); - mv64x60_write(&bh, MV64x60_CPU_ERR_MASK, 0x000000ff); - - /* Clear old errors and register internal SRAM error intr handler */ - mv64x60_write(&bh, MV64360_SRAM_ERR_CAUSE, 0); - if ((rc = request_irq(MV64360_IRQ_SRAM_PAR_ERR + mv64360_irq_base, - mv64360_sram_error_int_handler,IRQF_DISABLED,SRAM_INTR_STR, NULL))) - printk(KERN_WARNING "Can't register SRAM error handler: %d",rc); - - /* Clear old errors and register PCI 0 error intr handler */ - mv64x60_write(&bh, MV64x60_PCI0_ERR_CAUSE, 0); - if ((rc = request_irq(MV64360_IRQ_PCI0 + mv64360_irq_base, - mv64360_pci_error_int_handler, - IRQF_DISABLED, PCI0_INTR_STR, (void *)0))) - printk(KERN_WARNING "Can't register pci 0 error handler: %d", - rc); - - mv64x60_write(&bh, MV64x60_PCI0_ERR_MASK, 0); - mv64x60_write(&bh, MV64x60_PCI0_ERR_MASK, MV64360_PCI0_ERR_MASK_VAL); - - /* Erratum FEr PCI-#16 says to clear bit 0 of PCI SERRn Mask reg. */ - mv64x60_write(&bh, MV64x60_PCI0_ERR_SERR_MASK, - mv64x60_read(&bh, MV64x60_PCI0_ERR_SERR_MASK) & ~0x1UL); - - /* Clear old errors and register PCI 1 error intr handler */ - mv64x60_write(&bh, MV64x60_PCI1_ERR_CAUSE, 0); - if ((rc = request_irq(MV64360_IRQ_PCI1 + mv64360_irq_base, - mv64360_pci_error_int_handler, - IRQF_DISABLED, PCI1_INTR_STR, (void *)1))) - printk(KERN_WARNING "Can't register pci 1 error handler: %d", - rc); - - mv64x60_write(&bh, MV64x60_PCI1_ERR_MASK, 0); - mv64x60_write(&bh, MV64x60_PCI1_ERR_MASK, MV64360_PCI0_ERR_MASK_VAL); - - /* Erratum FEr PCI-#16 says to clear bit 0 of PCI Intr Mask reg. */ - mv64x60_write(&bh, MV64x60_PCI1_ERR_SERR_MASK, - mv64x60_read(&bh, MV64x60_PCI1_ERR_SERR_MASK) & ~0x1UL); - - return 0; -} - -arch_initcall(mv64360_register_hdlrs); |