diff options
Diffstat (limited to 'arch/mips/emma2rh/common')
| -rw-r--r-- | arch/mips/emma2rh/common/Makefile | 13 | ||||
| -rw-r--r-- | arch/mips/emma2rh/common/irq.c | 108 | ||||
| -rw-r--r-- | arch/mips/emma2rh/common/irq_emma2rh.c | 134 | ||||
| -rw-r--r-- | arch/mips/emma2rh/common/prom.c | 77 |
4 files changed, 332 insertions, 0 deletions
diff --git a/arch/mips/emma2rh/common/Makefile b/arch/mips/emma2rh/common/Makefile new file mode 100644 index 000000000000..859121b3867d --- /dev/null +++ b/arch/mips/emma2rh/common/Makefile @@ -0,0 +1,13 @@ +# +# arch/mips/emma2rh/common/Makefile +# Makefile for the common code of NEC EMMA2RH based board. +# +# Copyright (C) NEC Electronics Corporation 2005-2006 +# +# 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. +# + +obj-$(CONFIG_MARKEINS) += irq.o irq_emma2rh.o prom.o diff --git a/arch/mips/emma2rh/common/irq.c b/arch/mips/emma2rh/common/irq.c new file mode 100644 index 000000000000..b075281e50e9 --- /dev/null +++ b/arch/mips/emma2rh/common/irq.c @@ -0,0 +1,108 @@ +/* + * arch/mips/emma2rh/common/irq.c + * This file is common irq dispatcher. + * + * Copyright (C) NEC Electronics Corporation 2005-2006 + * + * This file is based on the arch/mips/ddb5xxx/ddb5477/irq.c + * + * Copyright 2001 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 program is distributed in the hope that it will be useful, + * but WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the + * GNU General Public License for more details. + * + * 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., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA + */ +#include <linux/config.h> +#include <linux/init.h> +#include <linux/interrupt.h> +#include <linux/irq.h> +#include <linux/types.h> + +#include <asm/i8259.h> +#include <asm/system.h> +#include <asm/mipsregs.h> +#include <asm/debug.h> +#include <asm/addrspace.h> +#include <asm/bootinfo.h> + +#include <asm/emma2rh/emma2rh.h> + +/* + * the first level int-handler will jump here if it is a emma2rh irq + */ +asmlinkage void emma2rh_irq_dispatch(struct pt_regs *regs) +{ + u32 intStatus; + u32 bitmask; + u32 i; + + intStatus = emma2rh_in32(EMMA2RH_BHIF_INT_ST_0) + & emma2rh_in32(EMMA2RH_BHIF_INT_EN_0); + +#ifdef EMMA2RH_SW_CASCADE + if (intStatus & + (1 << ((EMMA2RH_SW_CASCADE - EMMA2RH_IRQ_INT0) & (32 - 1)))) { + u32 swIntStatus; + swIntStatus = emma2rh_in32(EMMA2RH_BHIF_SW_INT) + & emma2rh_in32(EMMA2RH_BHIF_SW_INT_EN); + for (i = 0, bitmask = 1; i < 32; i++, bitmask <<= 1) { + if (swIntStatus & bitmask) { + do_IRQ(EMMA2RH_SW_IRQ_BASE + i, regs); + return; + } + } + } +#endif + + for (i = 0, bitmask = 1; i < 32; i++, bitmask <<= 1) { + if (intStatus & bitmask) { + do_IRQ(EMMA2RH_IRQ_BASE + i, regs); + return; + } + } + + intStatus = emma2rh_in32(EMMA2RH_BHIF_INT_ST_1) + & emma2rh_in32(EMMA2RH_BHIF_INT_EN_1); + +#ifdef EMMA2RH_GPIO_CASCADE + if (intStatus & + (1 << ((EMMA2RH_GPIO_CASCADE - EMMA2RH_IRQ_INT0) & (32 - 1)))) { + u32 gpioIntStatus; + gpioIntStatus = emma2rh_in32(EMMA2RH_GPIO_INT_ST) + & emma2rh_in32(EMMA2RH_GPIO_INT_MASK); + for (i = 0, bitmask = 1; i < 32; i++, bitmask <<= 1) { + if (gpioIntStatus & bitmask) { + do_IRQ(EMMA2RH_GPIO_IRQ_BASE + i, regs); + return; + } + } + } +#endif + + for (i = 32, bitmask = 1; i < 64; i++, bitmask <<= 1) { + if (intStatus & bitmask) { + do_IRQ(EMMA2RH_IRQ_BASE + i, regs); + return; + } + } + + intStatus = emma2rh_in32(EMMA2RH_BHIF_INT_ST_2) + & emma2rh_in32(EMMA2RH_BHIF_INT_EN_2); + + for (i = 64, bitmask = 1; i < 96; i++, bitmask <<= 1) { + if (intStatus & bitmask) { + do_IRQ(EMMA2RH_IRQ_BASE + i, regs); + return; + } + } +} diff --git a/arch/mips/emma2rh/common/irq_emma2rh.c b/arch/mips/emma2rh/common/irq_emma2rh.c new file mode 100644 index 000000000000..b886aa94ca90 --- /dev/null +++ b/arch/mips/emma2rh/common/irq_emma2rh.c @@ -0,0 +1,134 @@ +/* + * arch/mips/emma2rh/common/irq_emma2rh.c + * This file defines the irq handler for EMMA2RH. + * + * Copyright (C) NEC Electronics Corporation 2005-2006 + * + * This file is based on the arch/mips/ddb5xxx/ddb5477/irq_5477.c + * + * Copyright 2001 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 program is distributed in the hope that it will be useful, + * but WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the + * GNU General Public License for more details. + * + * 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., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA + */ + +/* + * EMMA2RH defines 64 IRQs. + * + * This file exports one function: + * emma2rh_irq_init(u32 irq_base); + */ + +#include <linux/interrupt.h> +#include <linux/types.h> +#include <linux/ptrace.h> + +#include <asm/debug.h> + +#include <asm/emma2rh/emma2rh.h> + +/* number of total irqs supported by EMMA2RH */ +#define NUM_EMMA2RH_IRQ 96 + +static int emma2rh_irq_base = -1; + +void ll_emma2rh_irq_enable(int); +void ll_emma2rh_irq_disable(int); + +static void emma2rh_irq_enable(unsigned int irq) +{ + ll_emma2rh_irq_enable(irq - emma2rh_irq_base); +} + +static void emma2rh_irq_disable(unsigned int irq) +{ + ll_emma2rh_irq_disable(irq - emma2rh_irq_base); +} + +static unsigned int emma2rh_irq_startup(unsigned int irq) +{ + emma2rh_irq_enable(irq); + return 0; +} + +#define emma2rh_irq_shutdown emma2rh_irq_disable + +static void emma2rh_irq_ack(unsigned int irq) +{ + /* disable interrupt - some handler will re-enable the irq + * and if the interrupt is leveled, we will have infinite loop + */ + ll_emma2rh_irq_disable(irq - emma2rh_irq_base); +} + +static void emma2rh_irq_end(unsigned int irq) +{ + if (!(irq_desc[irq].status & (IRQ_DISABLED | IRQ_INPROGRESS))) + ll_emma2rh_irq_enable(irq - emma2rh_irq_base); +} + +hw_irq_controller emma2rh_irq_controller = { + .typename = "emma2rh_irq", + .startup = emma2rh_irq_startup, + .shutdown = emma2rh_irq_shutdown, + .enable = emma2rh_irq_enable, + .disable = emma2rh_irq_disable, + .ack = emma2rh_irq_ack, + .end = emma2rh_irq_end, + .set_affinity = NULL /* no affinity stuff for UP */ +}; + +void emma2rh_irq_init(u32 irq_base) +{ + u32 i; + + for (i = irq_base; i < irq_base + NUM_EMMA2RH_IRQ; i++) { + irq_desc[i].status = IRQ_DISABLED; + irq_desc[i].action = NULL; + irq_desc[i].depth = 1; + irq_desc[i].handler = &emma2rh_irq_controller; + } + + emma2rh_irq_base = irq_base; +} + +void ll_emma2rh_irq_enable(int emma2rh_irq) +{ + u32 reg_value; + u32 reg_bitmask; + u32 reg_index; + + reg_index = EMMA2RH_BHIF_INT_EN_0 + + (EMMA2RH_BHIF_INT_EN_1 - EMMA2RH_BHIF_INT_EN_0) + * (emma2rh_irq / 32); + reg_value = emma2rh_in32(reg_index); + reg_bitmask = 0x1 << (emma2rh_irq % 32); + db_assert((reg_value & reg_bitmask) == 0); + emma2rh_out32(reg_index, reg_value | reg_bitmask); +} + +void ll_emma2rh_irq_disable(int emma2rh_irq) +{ + u32 reg_value; + u32 reg_bitmask; + u32 reg_index; + + reg_index = EMMA2RH_BHIF_INT_EN_0 + + (EMMA2RH_BHIF_INT_EN_1 - EMMA2RH_BHIF_INT_EN_0) + * (emma2rh_irq / 32); + reg_value = emma2rh_in32(reg_index); + reg_bitmask = 0x1 << (emma2rh_irq % 32); + db_assert((reg_value & reg_bitmask) != 0); + emma2rh_out32(reg_index, reg_value & ~reg_bitmask); +} diff --git a/arch/mips/emma2rh/common/prom.c b/arch/mips/emma2rh/common/prom.c new file mode 100644 index 000000000000..8bba0b02a204 --- /dev/null +++ b/arch/mips/emma2rh/common/prom.c @@ -0,0 +1,77 @@ +/* + * arch/mips/emma2rh/common/prom.c + * This file is prom file. + * + * Copyright (C) NEC Electronics Corporation 2004-2006 + * + * This file is based on the arch/mips/ddb5xxx/common/prom.c + * + * Copyright 2001 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 program is distributed in the hope that it will be useful, + * but WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the + * GNU General Public License for more details. + * + * 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., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA + */ +#include <linux/config.h> +#include <linux/init.h> +#include <linux/mm.h> +#include <linux/sched.h> +#include <linux/bootmem.h> + +#include <asm/addrspace.h> +#include <asm/bootinfo.h> +#include <asm/emma2rh/emma2rh.h> +#include <asm/debug.h> + +const char *get_system_type(void) +{ + switch (mips_machtype) { + case MACH_NEC_MARKEINS: + return "NEC EMMA2RH Mark-eins"; + default: + return "Unknown NEC board"; + } +} + +/* [jsun@junsun.net] PMON passes arguments in C main() style */ +void __init prom_init(void) +{ + int argc = fw_arg0; + char **arg = (char **)fw_arg1; + int i; + + /* if user passes kernel args, ignore the default one */ + if (argc > 1) + arcs_cmdline[0] = '\0'; + + /* arg[0] is "g", the rest is boot parameters */ + for (i = 1; i < argc; i++) { + if (strlen(arcs_cmdline) + strlen(arg[i] + 1) + >= sizeof(arcs_cmdline)) + break; + strcat(arcs_cmdline, arg[i]); + strcat(arcs_cmdline, " "); + } + + mips_machgroup = MACH_GROUP_NEC_EMMA2RH; + +#if defined(CONFIG_MARKEINS) + mips_machtype = MACH_NEC_MARKEINS; + add_memory_region(0, EMMA2RH_RAM_SIZE, BOOT_MEM_RAM); +#endif + +} + +void __init prom_free_prom_memory(void) +{ +} |