diff options
Diffstat (limited to 'arch/mips/vr41xx/common/icu.c')
-rw-r--r-- | arch/mips/vr41xx/common/icu.c | 714 |
1 files changed, 0 insertions, 714 deletions
diff --git a/arch/mips/vr41xx/common/icu.c b/arch/mips/vr41xx/common/icu.c deleted file mode 100644 index 9240bcdbe74e..000000000000 --- a/arch/mips/vr41xx/common/icu.c +++ /dev/null @@ -1,714 +0,0 @@ -// SPDX-License-Identifier: GPL-2.0-or-later -/* - * icu.c, Interrupt Control Unit routines for the NEC VR4100 series. - * - * Copyright (C) 2001-2002 MontaVista Software Inc. - * Author: Yoichi Yuasa <source@mvista.com> - * Copyright (C) 2003-2006 Yoichi Yuasa <yuasa@linux-mips.org> - */ -/* - * Changes: - * MontaVista Software Inc. <source@mvista.com> - * - New creation, NEC VR4122 and VR4131 are supported. - * - Added support for NEC VR4111 and VR4121. - * - * Yoichi Yuasa <yuasa@linux-mips.org> - * - Coped with INTASSIGN of NEC VR4133. - */ -#include <linux/errno.h> -#include <linux/export.h> -#include <linux/init.h> -#include <linux/ioport.h> -#include <linux/irq.h> -#include <linux/smp.h> -#include <linux/types.h> - -#include <asm/cpu.h> -#include <asm/io.h> -#include <asm/vr41xx/irq.h> -#include <asm/vr41xx/vr41xx.h> - -static void __iomem *icu1_base; -static void __iomem *icu2_base; - -static unsigned char sysint1_assign[16] = { - 0, 0, 1, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0 }; -static unsigned char sysint2_assign[16] = { - 2, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0 }; - -#define ICU1_TYPE1_BASE 0x0b000080UL -#define ICU2_TYPE1_BASE 0x0b000200UL - -#define ICU1_TYPE2_BASE 0x0f000080UL -#define ICU2_TYPE2_BASE 0x0f0000a0UL - -#define ICU1_SIZE 0x20 -#define ICU2_SIZE 0x1c - -#define SYSINT1REG 0x00 -#define PIUINTREG 0x02 -#define INTASSIGN0 0x04 -#define INTASSIGN1 0x06 -#define GIUINTLREG 0x08 -#define DSIUINTREG 0x0a -#define MSYSINT1REG 0x0c -#define MPIUINTREG 0x0e -#define MAIUINTREG 0x10 -#define MKIUINTREG 0x12 -#define MMACINTREG 0x12 -#define MGIUINTLREG 0x14 -#define MDSIUINTREG 0x16 -#define NMIREG 0x18 -#define SOFTREG 0x1a -#define INTASSIGN2 0x1c -#define INTASSIGN3 0x1e - -#define SYSINT2REG 0x00 -#define GIUINTHREG 0x02 -#define FIRINTREG 0x04 -#define MSYSINT2REG 0x06 -#define MGIUINTHREG 0x08 -#define MFIRINTREG 0x0a -#define PCIINTREG 0x0c - #define PCIINT0 0x0001 -#define SCUINTREG 0x0e - #define SCUINT0 0x0001 -#define CSIINTREG 0x10 -#define MPCIINTREG 0x12 -#define MSCUINTREG 0x14 -#define MCSIINTREG 0x16 -#define BCUINTREG 0x18 - #define BCUINTR 0x0001 -#define MBCUINTREG 0x1a - -#define SYSINT1_IRQ_TO_PIN(x) ((x) - SYSINT1_IRQ_BASE) /* Pin 0-15 */ -#define SYSINT2_IRQ_TO_PIN(x) ((x) - SYSINT2_IRQ_BASE) /* Pin 0-15 */ - -#define INT_TO_IRQ(x) ((x) + 2) /* Int0-4 -> IRQ2-6 */ - -#define icu1_read(offset) readw(icu1_base + (offset)) -#define icu1_write(offset, value) writew((value), icu1_base + (offset)) - -#define icu2_read(offset) readw(icu2_base + (offset)) -#define icu2_write(offset, value) writew((value), icu2_base + (offset)) - -#define INTASSIGN_MAX 4 -#define INTASSIGN_MASK 0x0007 - -static inline uint16_t icu1_set(uint8_t offset, uint16_t set) -{ - uint16_t data; - - data = icu1_read(offset); - data |= set; - icu1_write(offset, data); - - return data; -} - -static inline uint16_t icu1_clear(uint8_t offset, uint16_t clear) -{ - uint16_t data; - - data = icu1_read(offset); - data &= ~clear; - icu1_write(offset, data); - - return data; -} - -static inline uint16_t icu2_set(uint8_t offset, uint16_t set) -{ - uint16_t data; - - data = icu2_read(offset); - data |= set; - icu2_write(offset, data); - - return data; -} - -static inline uint16_t icu2_clear(uint8_t offset, uint16_t clear) -{ - uint16_t data; - - data = icu2_read(offset); - data &= ~clear; - icu2_write(offset, data); - - return data; -} - -void vr41xx_enable_piuint(uint16_t mask) -{ - struct irq_desc *desc = irq_to_desc(PIU_IRQ); - unsigned long flags; - - if (current_cpu_type() == CPU_VR4111 || - current_cpu_type() == CPU_VR4121) { - raw_spin_lock_irqsave(&desc->lock, flags); - icu1_set(MPIUINTREG, mask); - raw_spin_unlock_irqrestore(&desc->lock, flags); - } -} - -EXPORT_SYMBOL(vr41xx_enable_piuint); - -void vr41xx_disable_piuint(uint16_t mask) -{ - struct irq_desc *desc = irq_to_desc(PIU_IRQ); - unsigned long flags; - - if (current_cpu_type() == CPU_VR4111 || - current_cpu_type() == CPU_VR4121) { - raw_spin_lock_irqsave(&desc->lock, flags); - icu1_clear(MPIUINTREG, mask); - raw_spin_unlock_irqrestore(&desc->lock, flags); - } -} - -EXPORT_SYMBOL(vr41xx_disable_piuint); - -void vr41xx_enable_aiuint(uint16_t mask) -{ - struct irq_desc *desc = irq_to_desc(AIU_IRQ); - unsigned long flags; - - if (current_cpu_type() == CPU_VR4111 || - current_cpu_type() == CPU_VR4121) { - raw_spin_lock_irqsave(&desc->lock, flags); - icu1_set(MAIUINTREG, mask); - raw_spin_unlock_irqrestore(&desc->lock, flags); - } -} - -EXPORT_SYMBOL(vr41xx_enable_aiuint); - -void vr41xx_disable_aiuint(uint16_t mask) -{ - struct irq_desc *desc = irq_to_desc(AIU_IRQ); - unsigned long flags; - - if (current_cpu_type() == CPU_VR4111 || - current_cpu_type() == CPU_VR4121) { - raw_spin_lock_irqsave(&desc->lock, flags); - icu1_clear(MAIUINTREG, mask); - raw_spin_unlock_irqrestore(&desc->lock, flags); - } -} - -EXPORT_SYMBOL(vr41xx_disable_aiuint); - -void vr41xx_enable_kiuint(uint16_t mask) -{ - struct irq_desc *desc = irq_to_desc(KIU_IRQ); - unsigned long flags; - - if (current_cpu_type() == CPU_VR4111 || - current_cpu_type() == CPU_VR4121) { - raw_spin_lock_irqsave(&desc->lock, flags); - icu1_set(MKIUINTREG, mask); - raw_spin_unlock_irqrestore(&desc->lock, flags); - } -} - -EXPORT_SYMBOL(vr41xx_enable_kiuint); - -void vr41xx_disable_kiuint(uint16_t mask) -{ - struct irq_desc *desc = irq_to_desc(KIU_IRQ); - unsigned long flags; - - if (current_cpu_type() == CPU_VR4111 || - current_cpu_type() == CPU_VR4121) { - raw_spin_lock_irqsave(&desc->lock, flags); - icu1_clear(MKIUINTREG, mask); - raw_spin_unlock_irqrestore(&desc->lock, flags); - } -} - -EXPORT_SYMBOL(vr41xx_disable_kiuint); - -void vr41xx_enable_macint(uint16_t mask) -{ - struct irq_desc *desc = irq_to_desc(ETHERNET_IRQ); - unsigned long flags; - - raw_spin_lock_irqsave(&desc->lock, flags); - icu1_set(MMACINTREG, mask); - raw_spin_unlock_irqrestore(&desc->lock, flags); -} - -EXPORT_SYMBOL(vr41xx_enable_macint); - -void vr41xx_disable_macint(uint16_t mask) -{ - struct irq_desc *desc = irq_to_desc(ETHERNET_IRQ); - unsigned long flags; - - raw_spin_lock_irqsave(&desc->lock, flags); - icu1_clear(MMACINTREG, mask); - raw_spin_unlock_irqrestore(&desc->lock, flags); -} - -EXPORT_SYMBOL(vr41xx_disable_macint); - -void vr41xx_enable_dsiuint(uint16_t mask) -{ - struct irq_desc *desc = irq_to_desc(DSIU_IRQ); - unsigned long flags; - - raw_spin_lock_irqsave(&desc->lock, flags); - icu1_set(MDSIUINTREG, mask); - raw_spin_unlock_irqrestore(&desc->lock, flags); -} - -EXPORT_SYMBOL(vr41xx_enable_dsiuint); - -void vr41xx_disable_dsiuint(uint16_t mask) -{ - struct irq_desc *desc = irq_to_desc(DSIU_IRQ); - unsigned long flags; - - raw_spin_lock_irqsave(&desc->lock, flags); - icu1_clear(MDSIUINTREG, mask); - raw_spin_unlock_irqrestore(&desc->lock, flags); -} - -EXPORT_SYMBOL(vr41xx_disable_dsiuint); - -void vr41xx_enable_firint(uint16_t mask) -{ - struct irq_desc *desc = irq_to_desc(FIR_IRQ); - unsigned long flags; - - raw_spin_lock_irqsave(&desc->lock, flags); - icu2_set(MFIRINTREG, mask); - raw_spin_unlock_irqrestore(&desc->lock, flags); -} - -EXPORT_SYMBOL(vr41xx_enable_firint); - -void vr41xx_disable_firint(uint16_t mask) -{ - struct irq_desc *desc = irq_to_desc(FIR_IRQ); - unsigned long flags; - - raw_spin_lock_irqsave(&desc->lock, flags); - icu2_clear(MFIRINTREG, mask); - raw_spin_unlock_irqrestore(&desc->lock, flags); -} - -EXPORT_SYMBOL(vr41xx_disable_firint); - -void vr41xx_enable_pciint(void) -{ - struct irq_desc *desc = irq_to_desc(PCI_IRQ); - unsigned long flags; - - if (current_cpu_type() == CPU_VR4122 || - current_cpu_type() == CPU_VR4131 || - current_cpu_type() == CPU_VR4133) { - raw_spin_lock_irqsave(&desc->lock, flags); - icu2_write(MPCIINTREG, PCIINT0); - raw_spin_unlock_irqrestore(&desc->lock, flags); - } -} - -EXPORT_SYMBOL(vr41xx_enable_pciint); - -void vr41xx_disable_pciint(void) -{ - struct irq_desc *desc = irq_to_desc(PCI_IRQ); - unsigned long flags; - - if (current_cpu_type() == CPU_VR4122 || - current_cpu_type() == CPU_VR4131 || - current_cpu_type() == CPU_VR4133) { - raw_spin_lock_irqsave(&desc->lock, flags); - icu2_write(MPCIINTREG, 0); - raw_spin_unlock_irqrestore(&desc->lock, flags); - } -} - -EXPORT_SYMBOL(vr41xx_disable_pciint); - -void vr41xx_enable_scuint(void) -{ - struct irq_desc *desc = irq_to_desc(SCU_IRQ); - unsigned long flags; - - if (current_cpu_type() == CPU_VR4122 || - current_cpu_type() == CPU_VR4131 || - current_cpu_type() == CPU_VR4133) { - raw_spin_lock_irqsave(&desc->lock, flags); - icu2_write(MSCUINTREG, SCUINT0); - raw_spin_unlock_irqrestore(&desc->lock, flags); - } -} - -EXPORT_SYMBOL(vr41xx_enable_scuint); - -void vr41xx_disable_scuint(void) -{ - struct irq_desc *desc = irq_to_desc(SCU_IRQ); - unsigned long flags; - - if (current_cpu_type() == CPU_VR4122 || - current_cpu_type() == CPU_VR4131 || - current_cpu_type() == CPU_VR4133) { - raw_spin_lock_irqsave(&desc->lock, flags); - icu2_write(MSCUINTREG, 0); - raw_spin_unlock_irqrestore(&desc->lock, flags); - } -} - -EXPORT_SYMBOL(vr41xx_disable_scuint); - -void vr41xx_enable_csiint(uint16_t mask) -{ - struct irq_desc *desc = irq_to_desc(CSI_IRQ); - unsigned long flags; - - if (current_cpu_type() == CPU_VR4122 || - current_cpu_type() == CPU_VR4131 || - current_cpu_type() == CPU_VR4133) { - raw_spin_lock_irqsave(&desc->lock, flags); - icu2_set(MCSIINTREG, mask); - raw_spin_unlock_irqrestore(&desc->lock, flags); - } -} - -EXPORT_SYMBOL(vr41xx_enable_csiint); - -void vr41xx_disable_csiint(uint16_t mask) -{ - struct irq_desc *desc = irq_to_desc(CSI_IRQ); - unsigned long flags; - - if (current_cpu_type() == CPU_VR4122 || - current_cpu_type() == CPU_VR4131 || - current_cpu_type() == CPU_VR4133) { - raw_spin_lock_irqsave(&desc->lock, flags); - icu2_clear(MCSIINTREG, mask); - raw_spin_unlock_irqrestore(&desc->lock, flags); - } -} - -EXPORT_SYMBOL(vr41xx_disable_csiint); - -void vr41xx_enable_bcuint(void) -{ - struct irq_desc *desc = irq_to_desc(BCU_IRQ); - unsigned long flags; - - if (current_cpu_type() == CPU_VR4122 || - current_cpu_type() == CPU_VR4131 || - current_cpu_type() == CPU_VR4133) { - raw_spin_lock_irqsave(&desc->lock, flags); - icu2_write(MBCUINTREG, BCUINTR); - raw_spin_unlock_irqrestore(&desc->lock, flags); - } -} - -EXPORT_SYMBOL(vr41xx_enable_bcuint); - -void vr41xx_disable_bcuint(void) -{ - struct irq_desc *desc = irq_to_desc(BCU_IRQ); - unsigned long flags; - - if (current_cpu_type() == CPU_VR4122 || - current_cpu_type() == CPU_VR4131 || - current_cpu_type() == CPU_VR4133) { - raw_spin_lock_irqsave(&desc->lock, flags); - icu2_write(MBCUINTREG, 0); - raw_spin_unlock_irqrestore(&desc->lock, flags); - } -} - -EXPORT_SYMBOL(vr41xx_disable_bcuint); - -static void disable_sysint1_irq(struct irq_data *d) -{ - icu1_clear(MSYSINT1REG, 1 << SYSINT1_IRQ_TO_PIN(d->irq)); -} - -static void enable_sysint1_irq(struct irq_data *d) -{ - icu1_set(MSYSINT1REG, 1 << SYSINT1_IRQ_TO_PIN(d->irq)); -} - -static struct irq_chip sysint1_irq_type = { - .name = "SYSINT1", - .irq_mask = disable_sysint1_irq, - .irq_unmask = enable_sysint1_irq, -}; - -static void disable_sysint2_irq(struct irq_data *d) -{ - icu2_clear(MSYSINT2REG, 1 << SYSINT2_IRQ_TO_PIN(d->irq)); -} - -static void enable_sysint2_irq(struct irq_data *d) -{ - icu2_set(MSYSINT2REG, 1 << SYSINT2_IRQ_TO_PIN(d->irq)); -} - -static struct irq_chip sysint2_irq_type = { - .name = "SYSINT2", - .irq_mask = disable_sysint2_irq, - .irq_unmask = enable_sysint2_irq, -}; - -static inline int set_sysint1_assign(unsigned int irq, unsigned char assign) -{ - struct irq_desc *desc = irq_to_desc(irq); - uint16_t intassign0, intassign1; - unsigned int pin; - - pin = SYSINT1_IRQ_TO_PIN(irq); - - raw_spin_lock_irq(&desc->lock); - - intassign0 = icu1_read(INTASSIGN0); - intassign1 = icu1_read(INTASSIGN1); - - switch (pin) { - case 0: - intassign0 &= ~INTASSIGN_MASK; - intassign0 |= (uint16_t)assign; - break; - case 1: - intassign0 &= ~(INTASSIGN_MASK << 3); - intassign0 |= (uint16_t)assign << 3; - break; - case 2: - intassign0 &= ~(INTASSIGN_MASK << 6); - intassign0 |= (uint16_t)assign << 6; - break; - case 3: - intassign0 &= ~(INTASSIGN_MASK << 9); - intassign0 |= (uint16_t)assign << 9; - break; - case 8: - intassign0 &= ~(INTASSIGN_MASK << 12); - intassign0 |= (uint16_t)assign << 12; - break; - case 9: - intassign1 &= ~INTASSIGN_MASK; - intassign1 |= (uint16_t)assign; - break; - case 11: - intassign1 &= ~(INTASSIGN_MASK << 6); - intassign1 |= (uint16_t)assign << 6; - break; - case 12: - intassign1 &= ~(INTASSIGN_MASK << 9); - intassign1 |= (uint16_t)assign << 9; - break; - default: - raw_spin_unlock_irq(&desc->lock); - return -EINVAL; - } - - sysint1_assign[pin] = assign; - icu1_write(INTASSIGN0, intassign0); - icu1_write(INTASSIGN1, intassign1); - - raw_spin_unlock_irq(&desc->lock); - - return 0; -} - -static inline int set_sysint2_assign(unsigned int irq, unsigned char assign) -{ - struct irq_desc *desc = irq_to_desc(irq); - uint16_t intassign2, intassign3; - unsigned int pin; - - pin = SYSINT2_IRQ_TO_PIN(irq); - - raw_spin_lock_irq(&desc->lock); - - intassign2 = icu1_read(INTASSIGN2); - intassign3 = icu1_read(INTASSIGN3); - - switch (pin) { - case 0: - intassign2 &= ~INTASSIGN_MASK; - intassign2 |= (uint16_t)assign; - break; - case 1: - intassign2 &= ~(INTASSIGN_MASK << 3); - intassign2 |= (uint16_t)assign << 3; - break; - case 3: - intassign2 &= ~(INTASSIGN_MASK << 6); - intassign2 |= (uint16_t)assign << 6; - break; - case 4: - intassign2 &= ~(INTASSIGN_MASK << 9); - intassign2 |= (uint16_t)assign << 9; - break; - case 5: - intassign2 &= ~(INTASSIGN_MASK << 12); - intassign2 |= (uint16_t)assign << 12; - break; - case 6: - intassign3 &= ~INTASSIGN_MASK; - intassign3 |= (uint16_t)assign; - break; - case 7: - intassign3 &= ~(INTASSIGN_MASK << 3); - intassign3 |= (uint16_t)assign << 3; - break; - case 8: - intassign3 &= ~(INTASSIGN_MASK << 6); - intassign3 |= (uint16_t)assign << 6; - break; - case 9: - intassign3 &= ~(INTASSIGN_MASK << 9); - intassign3 |= (uint16_t)assign << 9; - break; - case 10: - intassign3 &= ~(INTASSIGN_MASK << 12); - intassign3 |= (uint16_t)assign << 12; - break; - default: - raw_spin_unlock_irq(&desc->lock); - return -EINVAL; - } - - sysint2_assign[pin] = assign; - icu1_write(INTASSIGN2, intassign2); - icu1_write(INTASSIGN3, intassign3); - - raw_spin_unlock_irq(&desc->lock); - - return 0; -} - -int vr41xx_set_intassign(unsigned int irq, unsigned char intassign) -{ - int retval = -EINVAL; - - if (current_cpu_type() != CPU_VR4133) - return -EINVAL; - - if (intassign > INTASSIGN_MAX) - return -EINVAL; - - if (irq >= SYSINT1_IRQ_BASE && irq <= SYSINT1_IRQ_LAST) - retval = set_sysint1_assign(irq, intassign); - else if (irq >= SYSINT2_IRQ_BASE && irq <= SYSINT2_IRQ_LAST) - retval = set_sysint2_assign(irq, intassign); - - return retval; -} - -EXPORT_SYMBOL(vr41xx_set_intassign); - -static int icu_get_irq(unsigned int irq) -{ - uint16_t pend1, pend2; - uint16_t mask1, mask2; - int i; - - pend1 = icu1_read(SYSINT1REG); - mask1 = icu1_read(MSYSINT1REG); - - pend2 = icu2_read(SYSINT2REG); - mask2 = icu2_read(MSYSINT2REG); - - mask1 &= pend1; - mask2 &= pend2; - - if (mask1) { - for (i = 0; i < 16; i++) { - if (irq == INT_TO_IRQ(sysint1_assign[i]) && (mask1 & (1 << i))) - return SYSINT1_IRQ(i); - } - } - - if (mask2) { - for (i = 0; i < 16; i++) { - if (irq == INT_TO_IRQ(sysint2_assign[i]) && (mask2 & (1 << i))) - return SYSINT2_IRQ(i); - } - } - - printk(KERN_ERR "spurious ICU interrupt: %04x,%04x\n", pend1, pend2); - - return -1; -} - -static int __init vr41xx_icu_init(void) -{ - unsigned long icu1_start, icu2_start; - int i; - - switch (current_cpu_type()) { - case CPU_VR4111: - case CPU_VR4121: - icu1_start = ICU1_TYPE1_BASE; - icu2_start = ICU2_TYPE1_BASE; - break; - case CPU_VR4122: - case CPU_VR4131: - case CPU_VR4133: - icu1_start = ICU1_TYPE2_BASE; - icu2_start = ICU2_TYPE2_BASE; - break; - default: - printk(KERN_ERR "ICU: Unexpected CPU of NEC VR4100 series\n"); - return -ENODEV; - } - - if (request_mem_region(icu1_start, ICU1_SIZE, "ICU") == NULL) - return -EBUSY; - - if (request_mem_region(icu2_start, ICU2_SIZE, "ICU") == NULL) { - release_mem_region(icu1_start, ICU1_SIZE); - return -EBUSY; - } - - icu1_base = ioremap(icu1_start, ICU1_SIZE); - if (icu1_base == NULL) { - release_mem_region(icu1_start, ICU1_SIZE); - release_mem_region(icu2_start, ICU2_SIZE); - return -ENOMEM; - } - - icu2_base = ioremap(icu2_start, ICU2_SIZE); - if (icu2_base == NULL) { - iounmap(icu1_base); - release_mem_region(icu1_start, ICU1_SIZE); - release_mem_region(icu2_start, ICU2_SIZE); - return -ENOMEM; - } - - icu1_write(MSYSINT1REG, 0); - icu1_write(MGIUINTLREG, 0xffff); - - icu2_write(MSYSINT2REG, 0); - icu2_write(MGIUINTHREG, 0xffff); - - for (i = SYSINT1_IRQ_BASE; i <= SYSINT1_IRQ_LAST; i++) - irq_set_chip_and_handler(i, &sysint1_irq_type, - handle_level_irq); - - for (i = SYSINT2_IRQ_BASE; i <= SYSINT2_IRQ_LAST; i++) - irq_set_chip_and_handler(i, &sysint2_irq_type, - handle_level_irq); - - cascade_irq(INT0_IRQ, icu_get_irq); - cascade_irq(INT1_IRQ, icu_get_irq); - cascade_irq(INT2_IRQ, icu_get_irq); - cascade_irq(INT3_IRQ, icu_get_irq); - cascade_irq(INT4_IRQ, icu_get_irq); - - return 0; -} - -core_initcall(vr41xx_icu_init); |