diff --git a/arch/mips/vr41xx/common/Makefile b/arch/mips/vr41xx/common/Makefile index 92c11e9bbb3fbc1ebe2554471e6e0698980dbe0b..fa98ef3855bc73c663df5d752e2abb84be722366 100644 --- a/arch/mips/vr41xx/common/Makefile +++ b/arch/mips/vr41xx/common/Makefile @@ -2,7 +2,7 @@ # Makefile for common code of the NEC VR4100 series. # -obj-y += bcu.o cmu.o giu.o icu.o init.o int-handler.o pmu.o +obj-y += bcu.o cmu.o icu.o init.o int-handler.o pmu.o obj-$(CONFIG_VRC4173) += vrc4173.o EXTRA_AFLAGS := $(CFLAGS) diff --git a/arch/mips/vr41xx/common/giu.c b/arch/mips/vr41xx/common/giu.c deleted file mode 100644 index 9c6b21a79e8f896dce761aa064ee5b81293a0997..0000000000000000000000000000000000000000 --- a/arch/mips/vr41xx/common/giu.c +++ /dev/null @@ -1,455 +0,0 @@ -/* - * giu.c, General-purpose I/O Unit Interrupt routines for NEC VR4100 series. - * - * Copyright (C) 2002 MontaVista Software Inc. - * Author: Yoichi Yuasa - * Copyright (C) 2003-2004 Yoichi Yuasa - * Copyright (C) 2005 Ralf Baechle (ralf@linux-mips.org) - * - * 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 - */ -/* - * Changes: - * MontaVista Software Inc. or - * - New creation, NEC VR4111, VR4121, VR4122 and VR4131 are supported. - * - * Yoichi Yuasa - * - Added support for NEC VR4133. - * - Removed board_irq_init. - */ -#include -#include -#include -#include -#include -#include -#include - -#include -#include -#include - -#define GIUIOSELL_TYPE1 KSEG1ADDR(0x0b000100) -#define GIUIOSELL_TYPE2 KSEG1ADDR(0x0f000140) - -#define GIUIOSELL 0x00 -#define GIUIOSELH 0x02 -#define GIUINTSTATL 0x08 -#define GIUINTSTATH 0x0a -#define GIUINTENL 0x0c -#define GIUINTENH 0x0e -#define GIUINTTYPL 0x10 -#define GIUINTTYPH 0x12 -#define GIUINTALSELL 0x14 -#define GIUINTALSELH 0x16 -#define GIUINTHTSELL 0x18 -#define GIUINTHTSELH 0x1a -#define GIUFEDGEINHL 0x20 -#define GIUFEDGEINHH 0x22 -#define GIUREDGEINHL 0x24 -#define GIUREDGEINHH 0x26 - -static uint32_t giu_base; - -static struct irqaction giu_cascade = { - .handler = no_action, - .mask = CPU_MASK_NONE, - .name = "cascade", -}; - -#define read_giuint(offset) readw(giu_base + (offset)) -#define write_giuint(val, offset) writew((val), giu_base + (offset)) - -#define GIUINT_HIGH_OFFSET 16 - -static inline uint16_t set_giuint(uint8_t offset, uint16_t set) -{ - uint16_t res; - - res = read_giuint(offset); - res |= set; - write_giuint(res, offset); - - return res; -} - -static inline uint16_t clear_giuint(uint8_t offset, uint16_t clear) -{ - uint16_t res; - - res = read_giuint(offset); - res &= ~clear; - write_giuint(res, offset); - - return res; -} - -static unsigned int startup_giuint_low_irq(unsigned int irq) -{ - unsigned int pin; - - pin = GIU_IRQ_TO_PIN(irq); - write_giuint((uint16_t)1 << pin, GIUINTSTATL); - set_giuint(GIUINTENL, (uint16_t)1 << pin); - - return 0; -} - -static void shutdown_giuint_low_irq(unsigned int irq) -{ - clear_giuint(GIUINTENL, (uint16_t)1 << GIU_IRQ_TO_PIN(irq)); -} - -static void enable_giuint_low_irq(unsigned int irq) -{ - set_giuint(GIUINTENL, (uint16_t)1 << GIU_IRQ_TO_PIN(irq)); -} - -#define disable_giuint_low_irq shutdown_giuint_low_irq - -static void ack_giuint_low_irq(unsigned int irq) -{ - unsigned int pin; - - pin = GIU_IRQ_TO_PIN(irq); - clear_giuint(GIUINTENL, (uint16_t)1 << pin); - write_giuint((uint16_t)1 << pin, GIUINTSTATL); -} - -static void end_giuint_low_irq(unsigned int irq) -{ - if (!(irq_desc[irq].status & (IRQ_DISABLED | IRQ_INPROGRESS))) - set_giuint(GIUINTENL, (uint16_t)1 << GIU_IRQ_TO_PIN(irq)); -} - -static struct hw_interrupt_type giuint_low_irq_type = { - .typename = "GIUINTL", - .startup = startup_giuint_low_irq, - .shutdown = shutdown_giuint_low_irq, - .enable = enable_giuint_low_irq, - .disable = disable_giuint_low_irq, - .ack = ack_giuint_low_irq, - .end = end_giuint_low_irq, -}; - -static unsigned int startup_giuint_high_irq(unsigned int irq) -{ - unsigned int pin; - - pin = GIU_IRQ_TO_PIN(irq - GIUINT_HIGH_OFFSET); - write_giuint((uint16_t)1 << pin, GIUINTSTATH); - set_giuint(GIUINTENH, (uint16_t)1 << pin); - - return 0; -} - -static void shutdown_giuint_high_irq(unsigned int irq) -{ - clear_giuint(GIUINTENH, (uint16_t)1 << GIU_IRQ_TO_PIN(irq - GIUINT_HIGH_OFFSET)); -} - -static void enable_giuint_high_irq(unsigned int irq) -{ - set_giuint(GIUINTENH, (uint16_t)1 << GIU_IRQ_TO_PIN(irq - GIUINT_HIGH_OFFSET)); -} - -#define disable_giuint_high_irq shutdown_giuint_high_irq - -static void ack_giuint_high_irq(unsigned int irq) -{ - unsigned int pin; - - pin = GIU_IRQ_TO_PIN(irq - GIUINT_HIGH_OFFSET); - clear_giuint(GIUINTENH, (uint16_t)1 << pin); - write_giuint((uint16_t)1 << pin, GIUINTSTATH); -} - -static void end_giuint_high_irq(unsigned int irq) -{ - if (!(irq_desc[irq].status & (IRQ_DISABLED | IRQ_INPROGRESS))) - set_giuint(GIUINTENH, (uint16_t)1 << GIU_IRQ_TO_PIN(irq - GIUINT_HIGH_OFFSET)); -} - -static struct hw_interrupt_type giuint_high_irq_type = { - .typename = "GIUINTH", - .startup = startup_giuint_high_irq, - .shutdown = shutdown_giuint_high_irq, - .enable = enable_giuint_high_irq, - .disable = disable_giuint_high_irq, - .ack = ack_giuint_high_irq, - .end = end_giuint_high_irq, -}; - -void __init init_vr41xx_giuint_irq(void) -{ - int i; - - for (i = GIU_IRQ_BASE; i <= GIU_IRQ_LAST; i++) { - if (i < (GIU_IRQ_BASE + GIUINT_HIGH_OFFSET)) - irq_desc[i].handler = &giuint_low_irq_type; - else - irq_desc[i].handler = &giuint_high_irq_type; - } - - setup_irq(GIUINT_CASCADE_IRQ, &giu_cascade); -} - -void vr41xx_set_irq_trigger(int pin, int trigger, int hold) -{ - uint16_t mask; - - if (pin < GIUINT_HIGH_OFFSET) { - mask = (uint16_t)1 << pin; - if (trigger != TRIGGER_LEVEL) { - set_giuint(GIUINTTYPL, mask); - if (hold == SIGNAL_HOLD) - set_giuint(GIUINTHTSELL, mask); - else - clear_giuint(GIUINTHTSELL, mask); - if (current_cpu_data.cputype == CPU_VR4133) { - switch (trigger) { - case TRIGGER_EDGE_FALLING: - set_giuint(GIUFEDGEINHL, mask); - clear_giuint(GIUREDGEINHL, mask); - break; - case TRIGGER_EDGE_RISING: - clear_giuint(GIUFEDGEINHL, mask); - set_giuint(GIUREDGEINHL, mask); - break; - default: - set_giuint(GIUFEDGEINHL, mask); - set_giuint(GIUREDGEINHL, mask); - break; - } - } - } else { - clear_giuint(GIUINTTYPL, mask); - clear_giuint(GIUINTHTSELL, mask); - } - write_giuint(mask, GIUINTSTATL); - } else { - mask = (uint16_t)1 << (pin - GIUINT_HIGH_OFFSET); - if (trigger != TRIGGER_LEVEL) { - set_giuint(GIUINTTYPH, mask); - if (hold == SIGNAL_HOLD) - set_giuint(GIUINTHTSELH, mask); - else - clear_giuint(GIUINTHTSELH, mask); - if (current_cpu_data.cputype == CPU_VR4133) { - switch (trigger) { - case TRIGGER_EDGE_FALLING: - set_giuint(GIUFEDGEINHH, mask); - clear_giuint(GIUREDGEINHH, mask); - break; - case TRIGGER_EDGE_RISING: - clear_giuint(GIUFEDGEINHH, mask); - set_giuint(GIUREDGEINHH, mask); - break; - default: - set_giuint(GIUFEDGEINHH, mask); - set_giuint(GIUREDGEINHH, mask); - break; - } - } - } else { - clear_giuint(GIUINTTYPH, mask); - clear_giuint(GIUINTHTSELH, mask); - } - write_giuint(mask, GIUINTSTATH); - } -} - -EXPORT_SYMBOL(vr41xx_set_irq_trigger); - -void vr41xx_set_irq_level(int pin, int level) -{ - uint16_t mask; - - if (pin < GIUINT_HIGH_OFFSET) { - mask = (uint16_t)1 << pin; - if (level == LEVEL_HIGH) - set_giuint(GIUINTALSELL, mask); - else - clear_giuint(GIUINTALSELL, mask); - write_giuint(mask, GIUINTSTATL); - } else { - mask = (uint16_t)1 << (pin - GIUINT_HIGH_OFFSET); - if (level == LEVEL_HIGH) - set_giuint(GIUINTALSELH, mask); - else - clear_giuint(GIUINTALSELH, mask); - write_giuint(mask, GIUINTSTATH); - } -} - -EXPORT_SYMBOL(vr41xx_set_irq_level); - -#define GIUINT_NR_IRQS 32 - -enum { - GIUINT_NO_CASCADE, - GIUINT_CASCADE -}; - -struct vr41xx_giuint_cascade { - unsigned int flag; - int (*get_irq_number)(int irq); -}; - -static struct vr41xx_giuint_cascade giuint_cascade[GIUINT_NR_IRQS]; - -static int no_irq_number(int irq) -{ - return -EINVAL; -} - -int vr41xx_cascade_irq(unsigned int irq, int (*get_irq_number)(int irq)) -{ - unsigned int pin; - int retval; - - if (irq < GIU_IRQ(0) || irq > GIU_IRQ(31)) - return -EINVAL; - - if(!get_irq_number) - return -EINVAL; - - pin = GIU_IRQ_TO_PIN(irq); - giuint_cascade[pin].flag = GIUINT_CASCADE; - giuint_cascade[pin].get_irq_number = get_irq_number; - - retval = setup_irq(irq, &giu_cascade); - if (retval != 0) { - giuint_cascade[pin].flag = GIUINT_NO_CASCADE; - giuint_cascade[pin].get_irq_number = no_irq_number; - } - - return retval; -} - -EXPORT_SYMBOL(vr41xx_cascade_irq); - -static inline int get_irq_pin_number(void) -{ - uint16_t pendl, pendh, maskl, maskh; - int i; - - pendl = read_giuint(GIUINTSTATL); - pendh = read_giuint(GIUINTSTATH); - maskl = read_giuint(GIUINTENL); - maskh = read_giuint(GIUINTENH); - - maskl &= pendl; - maskh &= pendh; - - if (maskl) { - for (i = 0; i < 16; i++) { - if (maskl & ((uint16_t)1 << i)) - return i; - } - } else if (maskh) { - for (i = 0; i < 16; i++) { - if (maskh & ((uint16_t)1 << i)) - return i + GIUINT_HIGH_OFFSET; - } - } - - printk(KERN_ERR "spurious GIU interrupt: %04x(%04x),%04x(%04x)\n", - maskl, pendl, maskh, pendh); - - atomic_inc(&irq_err_count); - - return -1; -} - -static inline void ack_giuint_irq(int pin) -{ - if (pin < GIUINT_HIGH_OFFSET) { - clear_giuint(GIUINTENL, (uint16_t)1 << pin); - write_giuint((uint16_t)1 << pin, GIUINTSTATL); - } else { - pin -= GIUINT_HIGH_OFFSET; - clear_giuint(GIUINTENH, (uint16_t)1 << pin); - write_giuint((uint16_t)1 << pin, GIUINTSTATH); - } -} - -static inline void end_giuint_irq(int pin) -{ - if (pin < GIUINT_HIGH_OFFSET) - set_giuint(GIUINTENL, (uint16_t)1 << pin); - else - set_giuint(GIUINTENH, (uint16_t)1 << (pin - GIUINT_HIGH_OFFSET)); -} - -void giuint_irq_dispatch(struct pt_regs *regs) -{ - struct vr41xx_giuint_cascade *cascade; - unsigned int giuint_irq; - int pin; - - pin = get_irq_pin_number(); - if (pin < 0) - return; - - disable_irq(GIUINT_CASCADE_IRQ); - - cascade = &giuint_cascade[pin]; - giuint_irq = GIU_IRQ(pin); - if (cascade->flag == GIUINT_CASCADE) { - int irq = cascade->get_irq_number(giuint_irq); - ack_giuint_irq(pin); - if (irq >= 0) - do_IRQ(irq, regs); - end_giuint_irq(pin); - } else { - do_IRQ(giuint_irq, regs); - } - - enable_irq(GIUINT_CASCADE_IRQ); -} - -static int __init vr41xx_giu_init(void) -{ - int i; - - switch (current_cpu_data.cputype) { - case CPU_VR4111: - case CPU_VR4121: - giu_base = GIUIOSELL_TYPE1; - break; - case CPU_VR4122: - case CPU_VR4131: - case CPU_VR4133: - giu_base = GIUIOSELL_TYPE2; - break; - default: - printk(KERN_ERR "GIU: Unexpected CPU of NEC VR4100 series\n"); - return -EINVAL; - } - - for (i = 0; i < GIUINT_NR_IRQS; i++) { - if (i < GIUINT_HIGH_OFFSET) - clear_giuint(GIUINTENL, (uint16_t)1 << i); - else - clear_giuint(GIUINTENH, (uint16_t)1 << (i - GIUINT_HIGH_OFFSET)); - giuint_cascade[i].flag = GIUINT_NO_CASCADE; - giuint_cascade[i].get_irq_number = no_irq_number; - } - - return 0; -} - -early_initcall(vr41xx_giu_init);