-config INTC_USERIMASK
- bool "Userspace interrupt masking support"
- depends on ARCH_SHMOBILE || (SUPERH && CPU_SH4A)
- help
- This enables support for hardware-assisted userspace hardirq
- masking.
+menu "SuperH / SH-Mobile Driver Options"
- SH-4A and newer interrupt blocks all support a special shadowed
- page with all non-masking registers obscured when mapped in to
- userspace. This is primarily for use by userspace device
- drivers that are using special priority levels.
+source "drivers/sh/intc/Kconfig"
- If in doubt, say N.
-
-config INTC_BALANCING
- bool "Hardware IRQ balancing support"
- depends on SMP && SUPERH && CPU_SHX3
- help
- This enables support for IRQ auto-distribution mode on SH-X3
- SMP parts. All of the balancing and CPU wakeup decisions are
- taken care of automatically by hardware for distributed
- vectors.
-
- If in doubt, say N.
-
-config INTC_MAPPING_DEBUG
- bool "Expose IRQ to per-controller id mapping via debugfs"
- depends on DEBUG_FS
- help
- This will create a debugfs entry for showing the relationship
- between system IRQs and the per-controller id tables.
-
- If in doubt, say N.
+endmenu
#
# Makefile for the SuperH specific drivers.
#
-obj-y := clk.o intc.o
+obj-y := clk.o intc/
obj-$(CONFIG_SUPERHYWAY) += superhyway/
obj-$(CONFIG_MAPLE) += maple/
+++ /dev/null
-/*
- * Shared interrupt handling code for IPR and INTC2 types of IRQs.
- *
- * Copyright (C) 2007, 2008 Magnus Damm
- * Copyright (C) 2009, 2010 Paul Mundt
- *
- * Based on intc2.c and ipr.c
- *
- * Copyright (C) 1999 Niibe Yutaka & Takeshi Yaegashi
- * Copyright (C) 2000 Kazumoto Kojima
- * Copyright (C) 2001 David J. Mckay (david.mckay@st.com)
- * Copyright (C) 2003 Takashi Kusuda <kusuda-takashi@hitachi-ul.co.jp>
- * Copyright (C) 2005, 2006 Paul Mundt
- *
- * This file is subject to the terms and conditions of the GNU General Public
- * License. See the file "COPYING" in the main directory of this archive
- * for more details.
- */
-#define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
-
-#include <linux/init.h>
-#include <linux/irq.h>
-#include <linux/module.h>
-#include <linux/io.h>
-#include <linux/slab.h>
-#include <linux/interrupt.h>
-#include <linux/sh_intc.h>
-#include <linux/sysdev.h>
-#include <linux/list.h>
-#include <linux/topology.h>
-#include <linux/bitmap.h>
-#include <linux/cpumask.h>
-#include <linux/spinlock.h>
-#include <linux/debugfs.h>
-#include <linux/seq_file.h>
-#include <linux/radix-tree.h>
-#include <linux/mutex.h>
-#include <linux/rcupdate.h>
-#include <asm/sizes.h>
-
-#define _INTC_MK(fn, mode, addr_e, addr_d, width, shift) \
- ((shift) | ((width) << 5) | ((fn) << 9) | ((mode) << 13) | \
- ((addr_e) << 16) | ((addr_d << 24)))
-
-#define _INTC_SHIFT(h) (h & 0x1f)
-#define _INTC_WIDTH(h) ((h >> 5) & 0xf)
-#define _INTC_FN(h) ((h >> 9) & 0xf)
-#define _INTC_MODE(h) ((h >> 13) & 0x7)
-#define _INTC_ADDR_E(h) ((h >> 16) & 0xff)
-#define _INTC_ADDR_D(h) ((h >> 24) & 0xff)
-
-struct intc_handle_int {
- unsigned int irq;
- unsigned long handle;
-};
-
-struct intc_window {
- phys_addr_t phys;
- void __iomem *virt;
- unsigned long size;
-};
-
-struct intc_map_entry {
- intc_enum enum_id;
- struct intc_desc_int *desc;
-};
-
-struct intc_subgroup_entry {
- unsigned int pirq;
- intc_enum enum_id;
- unsigned long handle;
-};
-
-struct intc_desc_int {
- struct list_head list;
- struct sys_device sysdev;
- struct radix_tree_root tree;
- pm_message_t state;
- spinlock_t lock;
- unsigned int index;
- unsigned long *reg;
-#ifdef CONFIG_SMP
- unsigned long *smp;
-#endif
- unsigned int nr_reg;
- struct intc_handle_int *prio;
- unsigned int nr_prio;
- struct intc_handle_int *sense;
- unsigned int nr_sense;
- struct intc_window *window;
- unsigned int nr_windows;
- struct irq_chip chip;
-};
-
-static LIST_HEAD(intc_list);
-static unsigned int nr_intc_controllers;
-
-/*
- * The intc_irq_map provides a global map of bound IRQ vectors for a
- * given platform. Allocation of IRQs are either static through the CPU
- * vector map, or dynamic in the case of board mux vectors or MSI.
- *
- * As this is a central point for all IRQ controllers on the system,
- * each of the available sources are mapped out here. This combined with
- * sparseirq makes it quite trivial to keep the vector map tightly packed
- * when dynamically creating IRQs, as well as tying in to otherwise
- * unused irq_desc positions in the sparse array.
- */
-static DECLARE_BITMAP(intc_irq_map, NR_IRQS);
-static struct intc_map_entry intc_irq_xlate[NR_IRQS];
-static DEFINE_SPINLOCK(vector_lock);
-static DEFINE_SPINLOCK(xlate_lock);
-
-#ifdef CONFIG_SMP
-#define IS_SMP(x) x.smp
-#define INTC_REG(d, x, c) (d->reg[(x)] + ((d->smp[(x)] & 0xff) * c))
-#define SMP_NR(d, x) ((d->smp[(x)] >> 8) ? (d->smp[(x)] >> 8) : 1)
-#else
-#define IS_SMP(x) 0
-#define INTC_REG(d, x, c) (d->reg[(x)])
-#define SMP_NR(d, x) 1
-#endif
-
-static unsigned int intc_prio_level[NR_IRQS]; /* for now */
-static unsigned int default_prio_level = 2; /* 2 - 16 */
-static unsigned long ack_handle[NR_IRQS];
-#ifdef CONFIG_INTC_BALANCING
-static unsigned long dist_handle[NR_IRQS];
-#endif
-
-struct intc_virq_list {
- unsigned int irq;
- struct intc_virq_list *next;
-};
-
-#define for_each_virq(entry, head) \
- for (entry = head; entry; entry = entry->next)
-
-static inline struct intc_desc_int *get_intc_desc(unsigned int irq)
-{
- struct irq_chip *chip = get_irq_chip(irq);
-
- return container_of(chip, struct intc_desc_int, chip);
-}
-
-static void intc_redirect_irq(unsigned int irq, struct irq_desc *desc)
-{
- generic_handle_irq((unsigned int)get_irq_data(irq));
-}
-
-static inline void activate_irq(int irq)
-{
-#ifdef CONFIG_ARM
- /* ARM requires an extra step to clear IRQ_NOREQUEST, which it
- * sets on behalf of every irq_chip. Also sets IRQ_NOPROBE.
- */
- set_irq_flags(irq, IRQF_VALID);
-#else
- /* same effect on other architectures */
- set_irq_noprobe(irq);
-#endif
-}
-
-static unsigned long intc_phys_to_virt(struct intc_desc_int *d,
- unsigned long address)
-{
- struct intc_window *window;
- int k;
-
- /* scan through physical windows and convert address */
- for (k = 0; k < d->nr_windows; k++) {
- window = d->window + k;
-
- if (address < window->phys)
- continue;
-
- if (address >= (window->phys + window->size))
- continue;
-
- address -= window->phys;
- address += (unsigned long)window->virt;
-
- return address;
- }
-
- /* no windows defined, register must be 1:1 mapped virt:phys */
- return address;
-}
-
-static unsigned int intc_get_reg(struct intc_desc_int *d, unsigned long address)
-{
- unsigned int k;
-
- address = intc_phys_to_virt(d, address);
-
- for (k = 0; k < d->nr_reg; k++) {
- if (d->reg[k] == address)
- return k;
- }
-
- BUG();
- return 0;
-}
-
-static inline unsigned int set_field(unsigned int value,
- unsigned int field_value,
- unsigned int handle)
-{
- unsigned int width = _INTC_WIDTH(handle);
- unsigned int shift = _INTC_SHIFT(handle);
-
- value &= ~(((1 << width) - 1) << shift);
- value |= field_value << shift;
- return value;
-}
-
-static inline unsigned long get_field(unsigned int value, unsigned int handle)
-{
- unsigned int width = _INTC_WIDTH(handle);
- unsigned int shift = _INTC_SHIFT(handle);
- unsigned int mask = ((1 << width) - 1) << shift;
-
- return (value & mask) >> shift;
-}
-
-static unsigned long test_8(unsigned long addr, unsigned long h,
- unsigned long ignore)
-{
- return get_field(__raw_readb(addr), h);
-}
-
-static unsigned long test_16(unsigned long addr, unsigned long h,
- unsigned long ignore)
-{
- return get_field(__raw_readw(addr), h);
-}
-
-static unsigned long test_32(unsigned long addr, unsigned long h,
- unsigned long ignore)
-{
- return get_field(__raw_readl(addr), h);
-}
-
-static unsigned long write_8(unsigned long addr, unsigned long h,
- unsigned long data)
-{
- __raw_writeb(set_field(0, data, h), addr);
- (void)__raw_readb(addr); /* Defeat write posting */
- return 0;
-}
-
-static unsigned long write_16(unsigned long addr, unsigned long h,
- unsigned long data)
-{
- __raw_writew(set_field(0, data, h), addr);
- (void)__raw_readw(addr); /* Defeat write posting */
- return 0;
-}
-
-static unsigned long write_32(unsigned long addr, unsigned long h,
- unsigned long data)
-{
- __raw_writel(set_field(0, data, h), addr);
- (void)__raw_readl(addr); /* Defeat write posting */
- return 0;
-}
-
-static unsigned long modify_8(unsigned long addr, unsigned long h,
- unsigned long data)
-{
- unsigned long flags;
- local_irq_save(flags);
- __raw_writeb(set_field(__raw_readb(addr), data, h), addr);
- (void)__raw_readb(addr); /* Defeat write posting */
- local_irq_restore(flags);
- return 0;
-}
-
-static unsigned long modify_16(unsigned long addr, unsigned long h,
- unsigned long data)
-{
- unsigned long flags;
- local_irq_save(flags);
- __raw_writew(set_field(__raw_readw(addr), data, h), addr);
- (void)__raw_readw(addr); /* Defeat write posting */
- local_irq_restore(flags);
- return 0;
-}
-
-static unsigned long modify_32(unsigned long addr, unsigned long h,
- unsigned long data)
-{
- unsigned long flags;
- local_irq_save(flags);
- __raw_writel(set_field(__raw_readl(addr), data, h), addr);
- (void)__raw_readl(addr); /* Defeat write posting */
- local_irq_restore(flags);
- return 0;
-}
-
-enum {
- REG_FN_ERR = 0,
- REG_FN_TEST_BASE = 1,
- REG_FN_WRITE_BASE = 5,
- REG_FN_MODIFY_BASE = 9
-};
-
-static unsigned long (*intc_reg_fns[])(unsigned long addr,
- unsigned long h,
- unsigned long data) = {
- [REG_FN_TEST_BASE + 0] = test_8,
- [REG_FN_TEST_BASE + 1] = test_16,
- [REG_FN_TEST_BASE + 3] = test_32,
- [REG_FN_WRITE_BASE + 0] = write_8,
- [REG_FN_WRITE_BASE + 1] = write_16,
- [REG_FN_WRITE_BASE + 3] = write_32,
- [REG_FN_MODIFY_BASE + 0] = modify_8,
- [REG_FN_MODIFY_BASE + 1] = modify_16,
- [REG_FN_MODIFY_BASE + 3] = modify_32,
-};
-
-enum { MODE_ENABLE_REG = 0, /* Bit(s) set -> interrupt enabled */
- MODE_MASK_REG, /* Bit(s) set -> interrupt disabled */
- MODE_DUAL_REG, /* Two registers, set bit to enable / disable */
- MODE_PRIO_REG, /* Priority value written to enable interrupt */
- MODE_PCLR_REG, /* Above plus all bits set to disable interrupt */
-};
-
-static unsigned long intc_mode_field(unsigned long addr,
- unsigned long handle,
- unsigned long (*fn)(unsigned long,
- unsigned long,
- unsigned long),
- unsigned int irq)
-{
- return fn(addr, handle, ((1 << _INTC_WIDTH(handle)) - 1));
-}
-
-static unsigned long intc_mode_zero(unsigned long addr,
- unsigned long handle,
- unsigned long (*fn)(unsigned long,
- unsigned long,
- unsigned long),
- unsigned int irq)
-{
- return fn(addr, handle, 0);
-}
-
-static unsigned long intc_mode_prio(unsigned long addr,
- unsigned long handle,
- unsigned long (*fn)(unsigned long,
- unsigned long,
- unsigned long),
- unsigned int irq)
-{
- return fn(addr, handle, intc_prio_level[irq]);
-}
-
-static unsigned long (*intc_enable_fns[])(unsigned long addr,
- unsigned long handle,
- unsigned long (*fn)(unsigned long,
- unsigned long,
- unsigned long),
- unsigned int irq) = {
- [MODE_ENABLE_REG] = intc_mode_field,
- [MODE_MASK_REG] = intc_mode_zero,
- [MODE_DUAL_REG] = intc_mode_field,
- [MODE_PRIO_REG] = intc_mode_prio,
- [MODE_PCLR_REG] = intc_mode_prio,
-};
-
-static unsigned long (*intc_disable_fns[])(unsigned long addr,
- unsigned long handle,
- unsigned long (*fn)(unsigned long,
- unsigned long,
- unsigned long),
- unsigned int irq) = {
- [MODE_ENABLE_REG] = intc_mode_zero,
- [MODE_MASK_REG] = intc_mode_field,
- [MODE_DUAL_REG] = intc_mode_field,
- [MODE_PRIO_REG] = intc_mode_zero,
- [MODE_PCLR_REG] = intc_mode_field,
-};
-
-#ifdef CONFIG_INTC_BALANCING
-static inline void intc_balancing_enable(unsigned int irq)
-{
- struct intc_desc_int *d = get_intc_desc(irq);
- unsigned long handle = dist_handle[irq];
- unsigned long addr;
-
- if (irq_balancing_disabled(irq) || !handle)
- return;
-
- addr = INTC_REG(d, _INTC_ADDR_D(handle), 0);
- intc_reg_fns[_INTC_FN(handle)](addr, handle, 1);
-}
-
-static inline void intc_balancing_disable(unsigned int irq)
-{
- struct intc_desc_int *d = get_intc_desc(irq);
- unsigned long handle = dist_handle[irq];
- unsigned long addr;
-
- if (irq_balancing_disabled(irq) || !handle)
- return;
-
- addr = INTC_REG(d, _INTC_ADDR_D(handle), 0);
- intc_reg_fns[_INTC_FN(handle)](addr, handle, 0);
-}
-
-static unsigned int intc_dist_data(struct intc_desc *desc,
- struct intc_desc_int *d,
- intc_enum enum_id)
-{
- struct intc_mask_reg *mr = desc->hw.mask_regs;
- unsigned int i, j, fn, mode;
- unsigned long reg_e, reg_d;
-
- for (i = 0; mr && enum_id && i < desc->hw.nr_mask_regs; i++) {
- mr = desc->hw.mask_regs + i;
-
- /*
- * Skip this entry if there's no auto-distribution
- * register associated with it.
- */
- if (!mr->dist_reg)
- continue;
-
- for (j = 0; j < ARRAY_SIZE(mr->enum_ids); j++) {
- if (mr->enum_ids[j] != enum_id)
- continue;
-
- fn = REG_FN_MODIFY_BASE;
- mode = MODE_ENABLE_REG;
- reg_e = mr->dist_reg;
- reg_d = mr->dist_reg;
-
- fn += (mr->reg_width >> 3) - 1;
- return _INTC_MK(fn, mode,
- intc_get_reg(d, reg_e),
- intc_get_reg(d, reg_d),
- 1,
- (mr->reg_width - 1) - j);
- }
- }
-
- /*
- * It's possible we've gotten here with no distribution options
- * available for the IRQ in question, so we just skip over those.
- */
- return 0;
-}
-#else
-static inline void intc_balancing_enable(unsigned int irq)
-{
-}
-
-static inline void intc_balancing_disable(unsigned int irq)
-{
-}
-#endif
-
-static inline void _intc_enable(unsigned int irq, unsigned long handle)
-{
- struct intc_desc_int *d = get_intc_desc(irq);
- unsigned long addr;
- unsigned int cpu;
-
- for (cpu = 0; cpu < SMP_NR(d, _INTC_ADDR_E(handle)); cpu++) {
-#ifdef CONFIG_SMP
- if (!cpumask_test_cpu(cpu, irq_to_desc(irq)->affinity))
- continue;
-#endif
- addr = INTC_REG(d, _INTC_ADDR_E(handle), cpu);
- intc_enable_fns[_INTC_MODE(handle)](addr, handle, intc_reg_fns\
- [_INTC_FN(handle)], irq);
- }
-
- intc_balancing_enable(irq);
-}
-
-static void intc_enable(unsigned int irq)
-{
- _intc_enable(irq, (unsigned long)get_irq_chip_data(irq));
-}
-
-static void intc_disable(unsigned int irq)
-{
- struct intc_desc_int *d = get_intc_desc(irq);
- unsigned long handle = (unsigned long)get_irq_chip_data(irq);
- unsigned long addr;
- unsigned int cpu;
-
- intc_balancing_disable(irq);
-
- for (cpu = 0; cpu < SMP_NR(d, _INTC_ADDR_D(handle)); cpu++) {
-#ifdef CONFIG_SMP
- if (!cpumask_test_cpu(cpu, irq_to_desc(irq)->affinity))
- continue;
-#endif
- addr = INTC_REG(d, _INTC_ADDR_D(handle), cpu);
- intc_disable_fns[_INTC_MODE(handle)](addr, handle,intc_reg_fns\
- [_INTC_FN(handle)], irq);
- }
-}
-
-static unsigned long
-(*intc_enable_noprio_fns[])(unsigned long addr,
- unsigned long handle,
- unsigned long (*fn)(unsigned long,
- unsigned long,
- unsigned long),
- unsigned int irq) = {
- [MODE_ENABLE_REG] = intc_mode_field,
- [MODE_MASK_REG] = intc_mode_zero,
- [MODE_DUAL_REG] = intc_mode_field,
- [MODE_PRIO_REG] = intc_mode_field,
- [MODE_PCLR_REG] = intc_mode_field,
-};
-
-static void intc_enable_disable(struct intc_desc_int *d,
- unsigned long handle, int do_enable)
-{
- unsigned long addr;
- unsigned int cpu;
- unsigned long (*fn)(unsigned long, unsigned long,
- unsigned long (*)(unsigned long, unsigned long,
- unsigned long),
- unsigned int);
-
- if (do_enable) {
- for (cpu = 0; cpu < SMP_NR(d, _INTC_ADDR_E(handle)); cpu++) {
- addr = INTC_REG(d, _INTC_ADDR_E(handle), cpu);
- fn = intc_enable_noprio_fns[_INTC_MODE(handle)];
- fn(addr, handle, intc_reg_fns[_INTC_FN(handle)], 0);
- }
- } else {
- for (cpu = 0; cpu < SMP_NR(d, _INTC_ADDR_D(handle)); cpu++) {
- addr = INTC_REG(d, _INTC_ADDR_D(handle), cpu);
- fn = intc_disable_fns[_INTC_MODE(handle)];
- fn(addr, handle, intc_reg_fns[_INTC_FN(handle)], 0);
- }
- }
-}
-
-static int intc_set_wake(unsigned int irq, unsigned int on)
-{
- return 0; /* allow wakeup, but setup hardware in intc_suspend() */
-}
-
-#ifdef CONFIG_SMP
-/*
- * This is held with the irq desc lock held, so we don't require any
- * additional locking here at the intc desc level. The affinity mask is
- * later tested in the enable/disable paths.
- */
-static int intc_set_affinity(unsigned int irq, const struct cpumask *cpumask)
-{
- if (!cpumask_intersects(cpumask, cpu_online_mask))
- return -1;
-
- cpumask_copy(irq_to_desc(irq)->affinity, cpumask);
-
- return 0;
-}
-#endif
-
-static void intc_mask_ack(unsigned int irq)
-{
- struct intc_desc_int *d = get_intc_desc(irq);
- unsigned long handle = ack_handle[irq];
- unsigned long addr;
-
- intc_disable(irq);
-
- /* read register and write zero only to the associated bit */
- if (handle) {
- addr = INTC_REG(d, _INTC_ADDR_D(handle), 0);
- switch (_INTC_FN(handle)) {
- case REG_FN_MODIFY_BASE + 0: /* 8bit */
- __raw_readb(addr);
- __raw_writeb(0xff ^ set_field(0, 1, handle), addr);
- break;
- case REG_FN_MODIFY_BASE + 1: /* 16bit */
- __raw_readw(addr);
- __raw_writew(0xffff ^ set_field(0, 1, handle), addr);
- break;
- case REG_FN_MODIFY_BASE + 3: /* 32bit */
- __raw_readl(addr);
- __raw_writel(0xffffffff ^ set_field(0, 1, handle), addr);
- break;
- default:
- BUG();
- break;
- }
- }
-}
-
-static struct intc_handle_int *intc_find_irq(struct intc_handle_int *hp,
- unsigned int nr_hp,
- unsigned int irq)
-{
- int i;
-
- /*
- * this doesn't scale well, but...
- *
- * this function should only be used for cerain uncommon
- * operations such as intc_set_priority() and intc_set_sense()
- * and in those rare cases performance doesn't matter that much.
- * keeping the memory footprint low is more important.
- *
- * one rather simple way to speed this up and still keep the
- * memory footprint down is to make sure the array is sorted
- * and then perform a bisect to lookup the irq.
- */
- for (i = 0; i < nr_hp; i++) {
- if ((hp + i)->irq != irq)
- continue;
-
- return hp + i;
- }
-
- return NULL;
-}
-
-int intc_set_priority(unsigned int irq, unsigned int prio)
-{
- struct intc_desc_int *d = get_intc_desc(irq);
- struct intc_handle_int *ihp;
-
- if (!intc_prio_level[irq] || prio <= 1)
- return -EINVAL;
-
- ihp = intc_find_irq(d->prio, d->nr_prio, irq);
- if (ihp) {
- if (prio >= (1 << _INTC_WIDTH(ihp->handle)))
- return -EINVAL;
-
- intc_prio_level[irq] = prio;
-
- /*
- * only set secondary masking method directly
- * primary masking method is using intc_prio_level[irq]
- * priority level will be set during next enable()
- */
- if (_INTC_FN(ihp->handle) != REG_FN_ERR)
- _intc_enable(irq, ihp->handle);
- }
- return 0;
-}
-
-#define VALID(x) (x | 0x80)
-
-static unsigned char intc_irq_sense_table[IRQ_TYPE_SENSE_MASK + 1] = {
- [IRQ_TYPE_EDGE_FALLING] = VALID(0),
- [IRQ_TYPE_EDGE_RISING] = VALID(1),
- [IRQ_TYPE_LEVEL_LOW] = VALID(2),
- /* SH7706, SH7707 and SH7709 do not support high level triggered */
-#if !defined(CONFIG_CPU_SUBTYPE_SH7706) && \
- !defined(CONFIG_CPU_SUBTYPE_SH7707) && \
- !defined(CONFIG_CPU_SUBTYPE_SH7709)
- [IRQ_TYPE_LEVEL_HIGH] = VALID(3),
-#endif
-};
-
-static int intc_set_sense(unsigned int irq, unsigned int type)
-{
- struct intc_desc_int *d = get_intc_desc(irq);
- unsigned char value = intc_irq_sense_table[type & IRQ_TYPE_SENSE_MASK];
- struct intc_handle_int *ihp;
- unsigned long addr;
-
- if (!value)
- return -EINVAL;
-
- ihp = intc_find_irq(d->sense, d->nr_sense, irq);
- if (ihp) {
- addr = INTC_REG(d, _INTC_ADDR_E(ihp->handle), 0);
- intc_reg_fns[_INTC_FN(ihp->handle)](addr, ihp->handle, value);
- }
- return 0;
-}
-
-static intc_enum __init intc_grp_id(struct intc_desc *desc,
- intc_enum enum_id)
-{
- struct intc_group *g = desc->hw.groups;
- unsigned int i, j;
-
- for (i = 0; g && enum_id && i < desc->hw.nr_groups; i++) {
- g = desc->hw.groups + i;
-
- for (j = 0; g->enum_ids[j]; j++) {
- if (g->enum_ids[j] != enum_id)
- continue;
-
- return g->enum_id;
- }
- }
-
- return 0;
-}
-
-static unsigned int __init _intc_mask_data(struct intc_desc *desc,
- struct intc_desc_int *d,
- intc_enum enum_id,
- unsigned int *reg_idx,
- unsigned int *fld_idx)
-{
- struct intc_mask_reg *mr = desc->hw.mask_regs;
- unsigned int fn, mode;
- unsigned long reg_e, reg_d;
-
- while (mr && enum_id && *reg_idx < desc->hw.nr_mask_regs) {
- mr = desc->hw.mask_regs + *reg_idx;
-
- for (; *fld_idx < ARRAY_SIZE(mr->enum_ids); (*fld_idx)++) {
- if (mr->enum_ids[*fld_idx] != enum_id)
- continue;
-
- if (mr->set_reg && mr->clr_reg) {
- fn = REG_FN_WRITE_BASE;
- mode = MODE_DUAL_REG;
- reg_e = mr->clr_reg;
- reg_d = mr->set_reg;
- } else {
- fn = REG_FN_MODIFY_BASE;
- if (mr->set_reg) {
- mode = MODE_ENABLE_REG;
- reg_e = mr->set_reg;
- reg_d = mr->set_reg;
- } else {
- mode = MODE_MASK_REG;
- reg_e = mr->clr_reg;
- reg_d = mr->clr_reg;
- }
- }
-
- fn += (mr->reg_width >> 3) - 1;
- return _INTC_MK(fn, mode,
- intc_get_reg(d, reg_e),
- intc_get_reg(d, reg_d),
- 1,
- (mr->reg_width - 1) - *fld_idx);
- }
-
- *fld_idx = 0;
- (*reg_idx)++;
- }
-
- return 0;
-}
-
-static unsigned int __init intc_mask_data(struct intc_desc *desc,
- struct intc_desc_int *d,
- intc_enum enum_id, int do_grps)
-{
- unsigned int i = 0;
- unsigned int j = 0;
- unsigned int ret;
-
- ret = _intc_mask_data(desc, d, enum_id, &i, &j);
- if (ret)
- return ret;
-
- if (do_grps)
- return intc_mask_data(desc, d, intc_grp_id(desc, enum_id), 0);
-
- return 0;
-}
-
-static unsigned int __init _intc_prio_data(struct intc_desc *desc,
- struct intc_desc_int *d,
- intc_enum enum_id,
- unsigned int *reg_idx,
- unsigned int *fld_idx)
-{
- struct intc_prio_reg *pr = desc->hw.prio_regs;
- unsigned int fn, n, mode, bit;
- unsigned long reg_e, reg_d;
-
- while (pr && enum_id && *reg_idx < desc->hw.nr_prio_regs) {
- pr = desc->hw.prio_regs + *reg_idx;
-
- for (; *fld_idx < ARRAY_SIZE(pr->enum_ids); (*fld_idx)++) {
- if (pr->enum_ids[*fld_idx] != enum_id)
- continue;
-
- if (pr->set_reg && pr->clr_reg) {
- fn = REG_FN_WRITE_BASE;
- mode = MODE_PCLR_REG;
- reg_e = pr->set_reg;
- reg_d = pr->clr_reg;
- } else {
- fn = REG_FN_MODIFY_BASE;
- mode = MODE_PRIO_REG;
- if (!pr->set_reg)
- BUG();
- reg_e = pr->set_reg;
- reg_d = pr->set_reg;
- }
-
- fn += (pr->reg_width >> 3) - 1;
- n = *fld_idx + 1;
-
- BUG_ON(n * pr->field_width > pr->reg_width);
-
- bit = pr->reg_width - (n * pr->field_width);
-
- return _INTC_MK(fn, mode,
- intc_get_reg(d, reg_e),
- intc_get_reg(d, reg_d),
- pr->field_width, bit);
- }
-
- *fld_idx = 0;
- (*reg_idx)++;
- }
-
- return 0;
-}
-
-static unsigned int __init intc_prio_data(struct intc_desc *desc,
- struct intc_desc_int *d,
- intc_enum enum_id, int do_grps)
-{
- unsigned int i = 0;
- unsigned int j = 0;
- unsigned int ret;
-
- ret = _intc_prio_data(desc, d, enum_id, &i, &j);
- if (ret)
- return ret;
-
- if (do_grps)
- return intc_prio_data(desc, d, intc_grp_id(desc, enum_id), 0);
-
- return 0;
-}
-
-static void __init intc_enable_disable_enum(struct intc_desc *desc,
- struct intc_desc_int *d,
- intc_enum enum_id, int enable)
-{
- unsigned int i, j, data;
-
- /* go through and enable/disable all mask bits */
- i = j = 0;
- do {
- data = _intc_mask_data(desc, d, enum_id, &i, &j);
- if (data)
- intc_enable_disable(d, data, enable);
- j++;
- } while (data);
-
- /* go through and enable/disable all priority fields */
- i = j = 0;
- do {
- data = _intc_prio_data(desc, d, enum_id, &i, &j);
- if (data)
- intc_enable_disable(d, data, enable);
-
- j++;
- } while (data);
-}
-
-static unsigned int __init intc_ack_data(struct intc_desc *desc,
- struct intc_desc_int *d,
- intc_enum enum_id)
-{
- struct intc_mask_reg *mr = desc->hw.ack_regs;
- unsigned int i, j, fn, mode;
- unsigned long reg_e, reg_d;
-
- for (i = 0; mr && enum_id && i < desc->hw.nr_ack_regs; i++) {
- mr = desc->hw.ack_regs + i;
-
- for (j = 0; j < ARRAY_SIZE(mr->enum_ids); j++) {
- if (mr->enum_ids[j] != enum_id)
- continue;
-
- fn = REG_FN_MODIFY_BASE;
- mode = MODE_ENABLE_REG;
- reg_e = mr->set_reg;
- reg_d = mr->set_reg;
-
- fn += (mr->reg_width >> 3) - 1;
- return _INTC_MK(fn, mode,
- intc_get_reg(d, reg_e),
- intc_get_reg(d, reg_d),
- 1,
- (mr->reg_width - 1) - j);
- }
- }
-
- return 0;
-}
-
-static unsigned int __init intc_sense_data(struct intc_desc *desc,
- struct intc_desc_int *d,
- intc_enum enum_id)
-{
- struct intc_sense_reg *sr = desc->hw.sense_regs;
- unsigned int i, j, fn, bit;
-
- for (i = 0; sr && enum_id && i < desc->hw.nr_sense_regs; i++) {
- sr = desc->hw.sense_regs + i;
-
- for (j = 0; j < ARRAY_SIZE(sr->enum_ids); j++) {
- if (sr->enum_ids[j] != enum_id)
- continue;
-
- fn = REG_FN_MODIFY_BASE;
- fn += (sr->reg_width >> 3) - 1;
-
- BUG_ON((j + 1) * sr->field_width > sr->reg_width);
-
- bit = sr->reg_width - ((j + 1) * sr->field_width);
-
- return _INTC_MK(fn, 0, intc_get_reg(d, sr->reg),
- 0, sr->field_width, bit);
- }
- }
-
- return 0;
-}
-
-#define INTC_TAG_VIRQ_NEEDS_ALLOC 0
-
-int intc_irq_lookup(const char *chipname, intc_enum enum_id)
-{
- struct intc_map_entry *ptr;
- struct intc_desc_int *d;
- int irq = -1;
-
- list_for_each_entry(d, &intc_list, list) {
- int tagged;
-
- if (strcmp(d->chip.name, chipname) != 0)
- continue;
-
- /*
- * Catch early lookups for subgroup VIRQs that have not
- * yet been allocated an IRQ. This already includes a
- * fast-path out if the tree is untagged, so there is no
- * need to explicitly test the root tree.
- */
- tagged = radix_tree_tag_get(&d->tree, enum_id,
- INTC_TAG_VIRQ_NEEDS_ALLOC);
- if (unlikely(tagged))
- break;
-
- ptr = radix_tree_lookup(&d->tree, enum_id);
- if (ptr) {
- irq = ptr - intc_irq_xlate;
- break;
- }
- }
-
- return irq;
-}
-EXPORT_SYMBOL_GPL(intc_irq_lookup);
-
-static int add_virq_to_pirq(unsigned int irq, unsigned int virq)
-{
- struct intc_virq_list **last, *entry;
- struct irq_desc *desc = irq_to_desc(irq);
-
- /* scan for duplicates */
- last = (struct intc_virq_list **)&desc->handler_data;
- for_each_virq(entry, desc->handler_data) {
- if (entry->irq == virq)
- return 0;
- last = &entry->next;
- }
-
- entry = kzalloc(sizeof(struct intc_virq_list), GFP_ATOMIC);
- if (!entry) {
- pr_err("can't allocate VIRQ mapping for %d\n", virq);
- return -ENOMEM;
- }
-
- entry->irq = virq;
-
- *last = entry;
-
- return 0;
-}
-
-static void intc_virq_handler(unsigned int irq, struct irq_desc *desc)
-{
- struct intc_virq_list *entry, *vlist = get_irq_data(irq);
- struct intc_desc_int *d = get_intc_desc(irq);
-
- desc->chip->mask_ack(irq);
-
- for_each_virq(entry, vlist) {
- unsigned long addr, handle;
-
- handle = (unsigned long)get_irq_data(entry->irq);
- addr = INTC_REG(d, _INTC_ADDR_E(handle), 0);
-
- if (intc_reg_fns[_INTC_FN(handle)](addr, handle, 0))
- generic_handle_irq(entry->irq);
- }
-
- desc->chip->unmask(irq);
-}
-
-static unsigned long __init intc_subgroup_data(struct intc_subgroup *subgroup,
- struct intc_desc_int *d,
- unsigned int index)
-{
- unsigned int fn = REG_FN_TEST_BASE + (subgroup->reg_width >> 3) - 1;
-
- return _INTC_MK(fn, MODE_ENABLE_REG, intc_get_reg(d, subgroup->reg),
- 0, 1, (subgroup->reg_width - 1) - index);
-}
-
-static void __init intc_subgroup_init_one(struct intc_desc *desc,
- struct intc_desc_int *d,
- struct intc_subgroup *subgroup)
-{
- struct intc_map_entry *mapped;
- unsigned int pirq;
- unsigned long flags;
- int i;
-
- mapped = radix_tree_lookup(&d->tree, subgroup->parent_id);
- if (!mapped) {
- WARN_ON(1);
- return;
- }
-
- pirq = mapped - intc_irq_xlate;
-
- spin_lock_irqsave(&d->lock, flags);
-
- for (i = 0; i < ARRAY_SIZE(subgroup->enum_ids); i++) {
- struct intc_subgroup_entry *entry;
- int err;
-
- if (!subgroup->enum_ids[i])
- continue;
-
- entry = kmalloc(sizeof(*entry), GFP_NOWAIT);
- if (!entry)
- break;
-
- entry->pirq = pirq;
- entry->enum_id = subgroup->enum_ids[i];
- entry->handle = intc_subgroup_data(subgroup, d, i);
-
- err = radix_tree_insert(&d->tree, entry->enum_id, entry);
- if (unlikely(err < 0))
- break;
-
- radix_tree_tag_set(&d->tree, entry->enum_id,
- INTC_TAG_VIRQ_NEEDS_ALLOC);
- }
-
- spin_unlock_irqrestore(&d->lock, flags);
-}
-
-static void __init intc_subgroup_init(struct intc_desc *desc,
- struct intc_desc_int *d)
-{
- int i;
-
- if (!desc->hw.subgroups)
- return;
-
- for (i = 0; i < desc->hw.nr_subgroups; i++)
- intc_subgroup_init_one(desc, d, desc->hw.subgroups + i);
-}
-
-static void __init intc_subgroup_map(struct intc_desc_int *d)
-{
- struct intc_subgroup_entry *entries[32];
- unsigned long flags;
- unsigned int nr_found;
- int i;
-
- spin_lock_irqsave(&d->lock, flags);
-
-restart:
- nr_found = radix_tree_gang_lookup_tag_slot(&d->tree,
- (void ***)entries, 0, ARRAY_SIZE(entries),
- INTC_TAG_VIRQ_NEEDS_ALLOC);
-
- for (i = 0; i < nr_found; i++) {
- struct intc_subgroup_entry *entry;
- int irq;
-
- entry = radix_tree_deref_slot((void **)entries[i]);
- if (unlikely(!entry))
- continue;
- if (unlikely(entry == RADIX_TREE_RETRY))
- goto restart;
-
- irq = create_irq();
- if (unlikely(irq < 0)) {
- pr_err("no more free IRQs, bailing..\n");
- break;
- }
-
- pr_info("Setting up a chained VIRQ from %d -> %d\n",
- irq, entry->pirq);
-
- spin_lock(&xlate_lock);
- intc_irq_xlate[irq].desc = d;
- intc_irq_xlate[irq].enum_id = entry->enum_id;
- spin_unlock(&xlate_lock);
-
- set_irq_chip_and_handler_name(irq, get_irq_chip(entry->pirq),
- handle_simple_irq, "virq");
- set_irq_chip_data(irq, get_irq_chip_data(entry->pirq));
-
- set_irq_data(irq, (void *)entry->handle);
-
- set_irq_chained_handler(entry->pirq, intc_virq_handler);
- add_virq_to_pirq(entry->pirq, irq);
-
- radix_tree_tag_clear(&d->tree, entry->enum_id,
- INTC_TAG_VIRQ_NEEDS_ALLOC);
- radix_tree_replace_slot((void **)entries[i],
- &intc_irq_xlate[irq]);
- }
-
- spin_unlock_irqrestore(&d->lock, flags);
-}
-
-void __init intc_finalize(void)
-{
- struct intc_desc_int *d;
-
- list_for_each_entry(d, &intc_list, list)
- if (radix_tree_tagged(&d->tree, INTC_TAG_VIRQ_NEEDS_ALLOC))
- intc_subgroup_map(d);
-}
-
-static void __init intc_register_irq(struct intc_desc *desc,
- struct intc_desc_int *d,
- intc_enum enum_id,
- unsigned int irq)
-{
- struct intc_handle_int *hp;
- unsigned int data[2], primary;
- unsigned long flags;
-
- /*
- * Register the IRQ position with the global IRQ map, then insert
- * it in to the radix tree.
- */
- set_bit(irq, intc_irq_map);
-
- spin_lock_irqsave(&xlate_lock, flags);
- radix_tree_insert(&d->tree, enum_id, &intc_irq_xlate[irq]);
- spin_unlock_irqrestore(&xlate_lock, flags);
-
- /*
- * Prefer single interrupt source bitmap over other combinations:
- *
- * 1. bitmap, single interrupt source
- * 2. priority, single interrupt source
- * 3. bitmap, multiple interrupt sources (groups)
- * 4. priority, multiple interrupt sources (groups)
- */
- data[0] = intc_mask_data(desc, d, enum_id, 0);
- data[1] = intc_prio_data(desc, d, enum_id, 0);
-
- primary = 0;
- if (!data[0] && data[1])
- primary = 1;
-
- if (!data[0] && !data[1])
- pr_warning("missing unique irq mask for irq %d (vect 0x%04x)\n",
- irq, irq2evt(irq));
-
- data[0] = data[0] ? data[0] : intc_mask_data(desc, d, enum_id, 1);
- data[1] = data[1] ? data[1] : intc_prio_data(desc, d, enum_id, 1);
-
- if (!data[primary])
- primary ^= 1;
-
- BUG_ON(!data[primary]); /* must have primary masking method */
-
- disable_irq_nosync(irq);
- set_irq_chip_and_handler_name(irq, &d->chip,
- handle_level_irq, "level");
- set_irq_chip_data(irq, (void *)data[primary]);
-
- /*
- * set priority level
- * - this needs to be at least 2 for 5-bit priorities on 7780
- */
- intc_prio_level[irq] = default_prio_level;
-
- /* enable secondary masking method if present */
- if (data[!primary])
- _intc_enable(irq, data[!primary]);
-
- /* add irq to d->prio list if priority is available */
- if (data[1]) {
- hp = d->prio + d->nr_prio;
- hp->irq = irq;
- hp->handle = data[1];
-
- if (primary) {
- /*
- * only secondary priority should access registers, so
- * set _INTC_FN(h) = REG_FN_ERR for intc_set_priority()
- */
- hp->handle &= ~_INTC_MK(0x0f, 0, 0, 0, 0, 0);
- hp->handle |= _INTC_MK(REG_FN_ERR, 0, 0, 0, 0, 0);
- }
- d->nr_prio++;
- }
-
- /* add irq to d->sense list if sense is available */
- data[0] = intc_sense_data(desc, d, enum_id);
- if (data[0]) {
- (d->sense + d->nr_sense)->irq = irq;
- (d->sense + d->nr_sense)->handle = data[0];
- d->nr_sense++;
- }
-
- /* irq should be disabled by default */
- d->chip.mask(irq);
-
- if (desc->hw.ack_regs)
- ack_handle[irq] = intc_ack_data(desc, d, enum_id);
-
-#ifdef CONFIG_INTC_BALANCING
- if (desc->hw.mask_regs)
- dist_handle[irq] = intc_dist_data(desc, d, enum_id);
-#endif
-
- activate_irq(irq);
-}
-
-static unsigned int __init save_reg(struct intc_desc_int *d,
- unsigned int cnt,
- unsigned long value,
- unsigned int smp)
-{
- if (value) {
- value = intc_phys_to_virt(d, value);
-
- d->reg[cnt] = value;
-#ifdef CONFIG_SMP
- d->smp[cnt] = smp;
-#endif
- return 1;
- }
-
- return 0;
-}
-
-int __init register_intc_controller(struct intc_desc *desc)
-{
- unsigned int i, k, smp;
- struct intc_hw_desc *hw = &desc->hw;
- struct intc_desc_int *d;
- struct resource *res;
-
- pr_info("Registered controller '%s' with %u IRQs\n",
- desc->name, hw->nr_vectors);
-
- d = kzalloc(sizeof(*d), GFP_NOWAIT);
- if (!d)
- goto err0;
-
- INIT_LIST_HEAD(&d->list);
- list_add_tail(&d->list, &intc_list);
-
- spin_lock_init(&d->lock);
-
- d->index = nr_intc_controllers;
-
- if (desc->num_resources) {
- d->nr_windows = desc->num_resources;
- d->window = kzalloc(d->nr_windows * sizeof(*d->window),
- GFP_NOWAIT);
- if (!d->window)
- goto err1;
-
- for (k = 0; k < d->nr_windows; k++) {
- res = desc->resource + k;
- WARN_ON(resource_type(res) != IORESOURCE_MEM);
- d->window[k].phys = res->start;
- d->window[k].size = resource_size(res);
- d->window[k].virt = ioremap_nocache(res->start,
- resource_size(res));
- if (!d->window[k].virt)
- goto err2;
- }
- }
-
- d->nr_reg = hw->mask_regs ? hw->nr_mask_regs * 2 : 0;
-#ifdef CONFIG_INTC_BALANCING
- if (d->nr_reg)
- d->nr_reg += hw->nr_mask_regs;
-#endif
- d->nr_reg += hw->prio_regs ? hw->nr_prio_regs * 2 : 0;
- d->nr_reg += hw->sense_regs ? hw->nr_sense_regs : 0;
- d->nr_reg += hw->ack_regs ? hw->nr_ack_regs : 0;
- d->nr_reg += hw->subgroups ? hw->nr_subgroups : 0;
-
- d->reg = kzalloc(d->nr_reg * sizeof(*d->reg), GFP_NOWAIT);
- if (!d->reg)
- goto err2;
-
-#ifdef CONFIG_SMP
- d->smp = kzalloc(d->nr_reg * sizeof(*d->smp), GFP_NOWAIT);
- if (!d->smp)
- goto err3;
-#endif
- k = 0;
-
- if (hw->mask_regs) {
- for (i = 0; i < hw->nr_mask_regs; i++) {
- smp = IS_SMP(hw->mask_regs[i]);
- k += save_reg(d, k, hw->mask_regs[i].set_reg, smp);
- k += save_reg(d, k, hw->mask_regs[i].clr_reg, smp);
-#ifdef CONFIG_INTC_BALANCING
- k += save_reg(d, k, hw->mask_regs[i].dist_reg, 0);
-#endif
- }
- }
-
- if (hw->prio_regs) {
- d->prio = kzalloc(hw->nr_vectors * sizeof(*d->prio),
- GFP_NOWAIT);
- if (!d->prio)
- goto err4;
-
- for (i = 0; i < hw->nr_prio_regs; i++) {
- smp = IS_SMP(hw->prio_regs[i]);
- k += save_reg(d, k, hw->prio_regs[i].set_reg, smp);
- k += save_reg(d, k, hw->prio_regs[i].clr_reg, smp);
- }
- }
-
- if (hw->sense_regs) {
- d->sense = kzalloc(hw->nr_vectors * sizeof(*d->sense),
- GFP_NOWAIT);
- if (!d->sense)
- goto err5;
-
- for (i = 0; i < hw->nr_sense_regs; i++)
- k += save_reg(d, k, hw->sense_regs[i].reg, 0);
- }
-
- if (hw->subgroups)
- for (i = 0; i < hw->nr_subgroups; i++)
- if (hw->subgroups[i].reg)
- k+= save_reg(d, k, hw->subgroups[i].reg, 0);
-
- d->chip.name = desc->name;
- d->chip.mask = intc_disable;
- d->chip.unmask = intc_enable;
- d->chip.mask_ack = intc_disable;
- d->chip.enable = intc_enable;
- d->chip.disable = intc_disable;
- d->chip.shutdown = intc_disable;
- d->chip.set_type = intc_set_sense;
- d->chip.set_wake = intc_set_wake;
-#ifdef CONFIG_SMP
- d->chip.set_affinity = intc_set_affinity;
-#endif
-
- if (hw->ack_regs) {
- for (i = 0; i < hw->nr_ack_regs; i++)
- k += save_reg(d, k, hw->ack_regs[i].set_reg, 0);
-
- d->chip.mask_ack = intc_mask_ack;
- }
-
- /* disable bits matching force_disable before registering irqs */
- if (desc->force_disable)
- intc_enable_disable_enum(desc, d, desc->force_disable, 0);
-
- /* disable bits matching force_enable before registering irqs */
- if (desc->force_enable)
- intc_enable_disable_enum(desc, d, desc->force_enable, 0);
-
- BUG_ON(k > 256); /* _INTC_ADDR_E() and _INTC_ADDR_D() are 8 bits */
-
- /* register the vectors one by one */
- for (i = 0; i < hw->nr_vectors; i++) {
- struct intc_vect *vect = hw->vectors + i;
- unsigned int irq = evt2irq(vect->vect);
- unsigned long flags;
- struct irq_desc *irq_desc;
-
- if (!vect->enum_id)
- continue;
-
- irq_desc = irq_to_desc_alloc_node(irq, numa_node_id());
- if (unlikely(!irq_desc)) {
- pr_err("can't get irq_desc for %d\n", irq);
- continue;
- }
-
- spin_lock_irqsave(&xlate_lock, flags);
- intc_irq_xlate[irq].enum_id = vect->enum_id;
- intc_irq_xlate[irq].desc = d;
- spin_unlock_irqrestore(&xlate_lock, flags);
-
- intc_register_irq(desc, d, vect->enum_id, irq);
-
- for (k = i + 1; k < hw->nr_vectors; k++) {
- struct intc_vect *vect2 = hw->vectors + k;
- unsigned int irq2 = evt2irq(vect2->vect);
-
- if (vect->enum_id != vect2->enum_id)
- continue;
-
- /*
- * In the case of multi-evt handling and sparse
- * IRQ support, each vector still needs to have
- * its own backing irq_desc.
- */
- irq_desc = irq_to_desc_alloc_node(irq2, numa_node_id());
- if (unlikely(!irq_desc)) {
- pr_err("can't get irq_desc for %d\n", irq2);
- continue;
- }
-
- vect2->enum_id = 0;
-
- /* redirect this interrupts to the first one */
- set_irq_chip(irq2, &dummy_irq_chip);
- set_irq_chained_handler(irq2, intc_redirect_irq);
- set_irq_data(irq2, (void *)irq);
- }
- }
-
- intc_subgroup_init(desc, d);
-
- /* enable bits matching force_enable after registering irqs */
- if (desc->force_enable)
- intc_enable_disable_enum(desc, d, desc->force_enable, 1);
-
- nr_intc_controllers++;
-
- return 0;
-err5:
- kfree(d->prio);
-err4:
-#ifdef CONFIG_SMP
- kfree(d->smp);
-err3:
-#endif
- kfree(d->reg);
-err2:
- for (k = 0; k < d->nr_windows; k++)
- if (d->window[k].virt)
- iounmap(d->window[k].virt);
-
- kfree(d->window);
-err1:
- kfree(d);
-err0:
- pr_err("unable to allocate INTC memory\n");
-
- return -ENOMEM;
-}
-
-#ifdef CONFIG_INTC_USERIMASK
-static void __iomem *uimask;
-
-int register_intc_userimask(unsigned long addr)
-{
- if (unlikely(uimask))
- return -EBUSY;
-
- uimask = ioremap_nocache(addr, SZ_4K);
- if (unlikely(!uimask))
- return -ENOMEM;
-
- pr_info("userimask support registered for levels 0 -> %d\n",
- default_prio_level - 1);
-
- return 0;
-}
-
-static ssize_t
-show_intc_userimask(struct sysdev_class *cls,
- struct sysdev_class_attribute *attr, char *buf)
-{
- return sprintf(buf, "%d\n", (__raw_readl(uimask) >> 4) & 0xf);
-}
-
-static ssize_t
-store_intc_userimask(struct sysdev_class *cls,
- struct sysdev_class_attribute *attr,
- const char *buf, size_t count)
-{
- unsigned long level;
-
- level = simple_strtoul(buf, NULL, 10);
-
- /*
- * Minimal acceptable IRQ levels are in the 2 - 16 range, but
- * these are chomped so as to not interfere with normal IRQs.
- *
- * Level 1 is a special case on some CPUs in that it's not
- * directly settable, but given that USERIMASK cuts off below a
- * certain level, we don't care about this limitation here.
- * Level 0 on the other hand equates to user masking disabled.
- *
- * We use default_prio_level as a cut off so that only special
- * case opt-in IRQs can be mangled.
- */
- if (level >= default_prio_level)
- return -EINVAL;
-
- __raw_writel(0xa5 << 24 | level << 4, uimask);
-
- return count;
-}
-
-static SYSDEV_CLASS_ATTR(userimask, S_IRUSR | S_IWUSR,
- show_intc_userimask, store_intc_userimask);
-#endif
-
-#ifdef CONFIG_INTC_MAPPING_DEBUG
-static int intc_irq_xlate_debug(struct seq_file *m, void *priv)
-{
- int i;
-
- seq_printf(m, "%-5s %-7s %-15s\n", "irq", "enum", "chip name");
-
- for (i = 1; i < nr_irqs; i++) {
- struct intc_desc_int *desc = intc_irq_xlate[i].desc;
-
- if (!desc)
- continue;
-
- seq_printf(m, "%5d ", i);
- seq_printf(m, "0x%05x ", intc_irq_xlate[i].enum_id);
- seq_printf(m, "%-15s\n", desc->chip.name);
- }
-
- return 0;
-}
-
-static int intc_irq_xlate_open(struct inode *inode, struct file *file)
-{
- return single_open(file, intc_irq_xlate_debug, inode->i_private);
-}
-
-static const struct file_operations intc_irq_xlate_fops = {
- .open = intc_irq_xlate_open,
- .read = seq_read,
- .llseek = seq_lseek,
- .release = single_release,
-};
-
-static int __init intc_irq_xlate_init(void)
-{
- /*
- * XXX.. use arch_debugfs_dir here when all of the intc users are
- * converted.
- */
- if (debugfs_create_file("intc_irq_xlate", S_IRUGO, NULL, NULL,
- &intc_irq_xlate_fops) == NULL)
- return -ENOMEM;
-
- return 0;
-}
-fs_initcall(intc_irq_xlate_init);
-#endif
-
-static ssize_t
-show_intc_name(struct sys_device *dev, struct sysdev_attribute *attr, char *buf)
-{
- struct intc_desc_int *d;
-
- d = container_of(dev, struct intc_desc_int, sysdev);
-
- return sprintf(buf, "%s\n", d->chip.name);
-}
-
-static SYSDEV_ATTR(name, S_IRUGO, show_intc_name, NULL);
-
-static int intc_suspend(struct sys_device *dev, pm_message_t state)
-{
- struct intc_desc_int *d;
- struct irq_desc *desc;
- int irq;
-
- /* get intc controller associated with this sysdev */
- d = container_of(dev, struct intc_desc_int, sysdev);
-
- switch (state.event) {
- case PM_EVENT_ON:
- if (d->state.event != PM_EVENT_FREEZE)
- break;
- for_each_irq_desc(irq, desc) {
- if (desc->handle_irq == intc_redirect_irq)
- continue;
- if (desc->chip != &d->chip)
- continue;
- if (desc->status & IRQ_DISABLED)
- intc_disable(irq);
- else
- intc_enable(irq);
- }
- break;
- case PM_EVENT_FREEZE:
- /* nothing has to be done */
- break;
- case PM_EVENT_SUSPEND:
- /* enable wakeup irqs belonging to this intc controller */
- for_each_irq_desc(irq, desc) {
- if ((desc->status & IRQ_WAKEUP) && (desc->chip == &d->chip))
- intc_enable(irq);
- }
- break;
- }
- d->state = state;
-
- return 0;
-}
-
-static int intc_resume(struct sys_device *dev)
-{
- return intc_suspend(dev, PMSG_ON);
-}
-
-static struct sysdev_class intc_sysdev_class = {
- .name = "intc",
- .suspend = intc_suspend,
- .resume = intc_resume,
-};
-
-/* register this intc as sysdev to allow suspend/resume */
-static int __init register_intc_sysdevs(void)
-{
- struct intc_desc_int *d;
- int error;
-
- error = sysdev_class_register(&intc_sysdev_class);
-#ifdef CONFIG_INTC_USERIMASK
- if (!error && uimask)
- error = sysdev_class_create_file(&intc_sysdev_class,
- &attr_userimask);
-#endif
- if (!error) {
- list_for_each_entry(d, &intc_list, list) {
- d->sysdev.id = d->index;
- d->sysdev.cls = &intc_sysdev_class;
- error = sysdev_register(&d->sysdev);
- if (error == 0)
- error = sysdev_create_file(&d->sysdev,
- &attr_name);
- if (error)
- break;
- }
- }
-
- if (error)
- pr_err("sysdev registration error\n");
-
- return error;
-}
-device_initcall(register_intc_sysdevs);
-
-/*
- * Dynamic IRQ allocation and deallocation
- */
-unsigned int create_irq_nr(unsigned int irq_want, int node)
-{
- unsigned int irq = 0, new;
- unsigned long flags;
- struct irq_desc *desc;
-
- spin_lock_irqsave(&vector_lock, flags);
-
- /*
- * First try the wanted IRQ
- */
- if (test_and_set_bit(irq_want, intc_irq_map) == 0) {
- new = irq_want;
- } else {
- /* .. then fall back to scanning. */
- new = find_first_zero_bit(intc_irq_map, nr_irqs);
- if (unlikely(new == nr_irqs))
- goto out_unlock;
-
- __set_bit(new, intc_irq_map);
- }
-
- desc = irq_to_desc_alloc_node(new, node);
- if (unlikely(!desc)) {
- pr_err("can't get irq_desc for %d\n", new);
- goto out_unlock;
- }
-
- desc = move_irq_desc(desc, node);
- irq = new;
-
-out_unlock:
- spin_unlock_irqrestore(&vector_lock, flags);
-
- if (irq > 0) {
- dynamic_irq_init(irq);
- activate_irq(irq);
- }
-
- return irq;
-}
-
-int create_irq(void)
-{
- int nid = cpu_to_node(smp_processor_id());
- int irq;
-
- irq = create_irq_nr(NR_IRQS_LEGACY, nid);
- if (irq == 0)
- irq = -1;
-
- return irq;
-}
-
-void destroy_irq(unsigned int irq)
-{
- unsigned long flags;
-
- dynamic_irq_cleanup(irq);
-
- spin_lock_irqsave(&vector_lock, flags);
- __clear_bit(irq, intc_irq_map);
- spin_unlock_irqrestore(&vector_lock, flags);
-}
-
-int reserve_irq_vector(unsigned int irq)
-{
- unsigned long flags;
- int ret = 0;
-
- spin_lock_irqsave(&vector_lock, flags);
- if (test_and_set_bit(irq, intc_irq_map))
- ret = -EBUSY;
- spin_unlock_irqrestore(&vector_lock, flags);
-
- return ret;
-}
-
-void reserve_intc_vectors(struct intc_vect *vectors, unsigned int nr_vecs)
-{
- unsigned long flags;
- int i;
-
- spin_lock_irqsave(&vector_lock, flags);
- for (i = 0; i < nr_vecs; i++)
- __set_bit(evt2irq(vectors[i].vect), intc_irq_map);
- spin_unlock_irqrestore(&vector_lock, flags);
-}
-
-void reserve_irq_legacy(void)
-{
- unsigned long flags;
- int i, j;
-
- spin_lock_irqsave(&vector_lock, flags);
- j = find_first_bit(intc_irq_map, nr_irqs);
- for (i = 0; i < j; i++)
- __set_bit(i, intc_irq_map);
- spin_unlock_irqrestore(&vector_lock, flags);
-}
--- /dev/null
+/*
+ * Common INTC2 register accessors
+ *
+ * Copyright (C) 2007, 2008 Magnus Damm
+ * Copyright (C) 2009, 2010 Paul Mundt
+ *
+ * This file is subject to the terms and conditions of the GNU General Public
+ * License. See the file "COPYING" in the main directory of this archive
+ * for more details.
+ */
+#include <linux/io.h>
+#include "internals.h"
+
+unsigned long intc_phys_to_virt(struct intc_desc_int *d, unsigned long address)
+{
+ struct intc_window *window;
+ int k;
+
+ /* scan through physical windows and convert address */
+ for (k = 0; k < d->nr_windows; k++) {
+ window = d->window + k;
+
+ if (address < window->phys)
+ continue;
+
+ if (address >= (window->phys + window->size))
+ continue;
+
+ address -= window->phys;
+ address += (unsigned long)window->virt;
+
+ return address;
+ }
+
+ /* no windows defined, register must be 1:1 mapped virt:phys */
+ return address;
+}
+
+unsigned int intc_get_reg(struct intc_desc_int *d, unsigned long address)
+{
+ unsigned int k;
+
+ address = intc_phys_to_virt(d, address);
+
+ for (k = 0; k < d->nr_reg; k++) {
+ if (d->reg[k] == address)
+ return k;
+ }
+
+ BUG();
+ return 0;
+}
+
+unsigned int intc_set_field_from_handle(unsigned int value,
+ unsigned int field_value,
+ unsigned int handle)
+{
+ unsigned int width = _INTC_WIDTH(handle);
+ unsigned int shift = _INTC_SHIFT(handle);
+
+ value &= ~(((1 << width) - 1) << shift);
+ value |= field_value << shift;
+ return value;
+}
+
+unsigned long intc_get_field_from_handle(unsigned int value, unsigned int handle)
+{
+ unsigned int width = _INTC_WIDTH(handle);
+ unsigned int shift = _INTC_SHIFT(handle);
+ unsigned int mask = ((1 << width) - 1) << shift;
+
+ return (value & mask) >> shift;
+}
+
+static unsigned long test_8(unsigned long addr, unsigned long h,
+ unsigned long ignore)
+{
+ return intc_get_field_from_handle(__raw_readb(addr), h);
+}
+
+static unsigned long test_16(unsigned long addr, unsigned long h,
+ unsigned long ignore)
+{
+ return intc_get_field_from_handle(__raw_readw(addr), h);
+}
+
+static unsigned long test_32(unsigned long addr, unsigned long h,
+ unsigned long ignore)
+{
+ return intc_get_field_from_handle(__raw_readl(addr), h);
+}
+
+static unsigned long write_8(unsigned long addr, unsigned long h,
+ unsigned long data)
+{
+ __raw_writeb(intc_set_field_from_handle(0, data, h), addr);
+ (void)__raw_readb(addr); /* Defeat write posting */
+ return 0;
+}
+
+static unsigned long write_16(unsigned long addr, unsigned long h,
+ unsigned long data)
+{
+ __raw_writew(intc_set_field_from_handle(0, data, h), addr);
+ (void)__raw_readw(addr); /* Defeat write posting */
+ return 0;
+}
+
+static unsigned long write_32(unsigned long addr, unsigned long h,
+ unsigned long data)
+{
+ __raw_writel(intc_set_field_from_handle(0, data, h), addr);
+ (void)__raw_readl(addr); /* Defeat write posting */
+ return 0;
+}
+
+static unsigned long modify_8(unsigned long addr, unsigned long h,
+ unsigned long data)
+{
+ unsigned long flags;
+ unsigned int value;
+ local_irq_save(flags);
+ value = intc_set_field_from_handle(__raw_readb(addr), data, h);
+ __raw_writeb(value, addr);
+ (void)__raw_readb(addr); /* Defeat write posting */
+ local_irq_restore(flags);
+ return 0;
+}
+
+static unsigned long modify_16(unsigned long addr, unsigned long h,
+ unsigned long data)
+{
+ unsigned long flags;
+ unsigned int value;
+ local_irq_save(flags);
+ value = intc_set_field_from_handle(__raw_readw(addr), data, h);
+ __raw_writew(value, addr);
+ (void)__raw_readw(addr); /* Defeat write posting */
+ local_irq_restore(flags);
+ return 0;
+}
+
+static unsigned long modify_32(unsigned long addr, unsigned long h,
+ unsigned long data)
+{
+ unsigned long flags;
+ unsigned int value;
+ local_irq_save(flags);
+ value = intc_set_field_from_handle(__raw_readl(addr), data, h);
+ __raw_writel(value, addr);
+ (void)__raw_readl(addr); /* Defeat write posting */
+ local_irq_restore(flags);
+ return 0;
+}
+
+static unsigned long intc_mode_field(unsigned long addr,
+ unsigned long handle,
+ unsigned long (*fn)(unsigned long,
+ unsigned long,
+ unsigned long),
+ unsigned int irq)
+{
+ return fn(addr, handle, ((1 << _INTC_WIDTH(handle)) - 1));
+}
+
+static unsigned long intc_mode_zero(unsigned long addr,
+ unsigned long handle,
+ unsigned long (*fn)(unsigned long,
+ unsigned long,
+ unsigned long),
+ unsigned int irq)
+{
+ return fn(addr, handle, 0);
+}
+
+static unsigned long intc_mode_prio(unsigned long addr,
+ unsigned long handle,
+ unsigned long (*fn)(unsigned long,
+ unsigned long,
+ unsigned long),
+ unsigned int irq)
+{
+ return fn(addr, handle, intc_get_prio_level(irq));
+}
+
+unsigned long (*intc_reg_fns[])(unsigned long addr,
+ unsigned long h,
+ unsigned long data) = {
+ [REG_FN_TEST_BASE + 0] = test_8,
+ [REG_FN_TEST_BASE + 1] = test_16,
+ [REG_FN_TEST_BASE + 3] = test_32,
+ [REG_FN_WRITE_BASE + 0] = write_8,
+ [REG_FN_WRITE_BASE + 1] = write_16,
+ [REG_FN_WRITE_BASE + 3] = write_32,
+ [REG_FN_MODIFY_BASE + 0] = modify_8,
+ [REG_FN_MODIFY_BASE + 1] = modify_16,
+ [REG_FN_MODIFY_BASE + 3] = modify_32,
+};
+
+unsigned long (*intc_enable_fns[])(unsigned long addr,
+ unsigned long handle,
+ unsigned long (*fn)(unsigned long,
+ unsigned long,
+ unsigned long),
+ unsigned int irq) = {
+ [MODE_ENABLE_REG] = intc_mode_field,
+ [MODE_MASK_REG] = intc_mode_zero,
+ [MODE_DUAL_REG] = intc_mode_field,
+ [MODE_PRIO_REG] = intc_mode_prio,
+ [MODE_PCLR_REG] = intc_mode_prio,
+};
+
+unsigned long (*intc_disable_fns[])(unsigned long addr,
+ unsigned long handle,
+ unsigned long (*fn)(unsigned long,
+ unsigned long,
+ unsigned long),
+ unsigned int irq) = {
+ [MODE_ENABLE_REG] = intc_mode_zero,
+ [MODE_MASK_REG] = intc_mode_field,
+ [MODE_DUAL_REG] = intc_mode_field,
+ [MODE_PRIO_REG] = intc_mode_zero,
+ [MODE_PCLR_REG] = intc_mode_field,
+};
+
+unsigned long (*intc_enable_noprio_fns[])(unsigned long addr,
+ unsigned long handle,
+ unsigned long (*fn)(unsigned long,
+ unsigned long,
+ unsigned long),
+ unsigned int irq) = {
+ [MODE_ENABLE_REG] = intc_mode_field,
+ [MODE_MASK_REG] = intc_mode_zero,
+ [MODE_DUAL_REG] = intc_mode_field,
+ [MODE_PRIO_REG] = intc_mode_field,
+ [MODE_PCLR_REG] = intc_mode_field,
+};
--- /dev/null
+/*
+ * Support for hardware-managed IRQ auto-distribution.
+ *
+ * Copyright (C) 2010 Paul Mundt
+ *
+ * This file is subject to the terms and conditions of the GNU General Public
+ * License. See the file "COPYING" in the main directory of this archive
+ * for more details.
+ */
+#include "internals.h"
+
+static unsigned long dist_handle[NR_IRQS];
+
+void intc_balancing_enable(unsigned int irq)
+{
+ struct intc_desc_int *d = get_intc_desc(irq);
+ unsigned long handle = dist_handle[irq];
+ unsigned long addr;
+
+ if (irq_balancing_disabled(irq) || !handle)
+ return;
+
+ addr = INTC_REG(d, _INTC_ADDR_D(handle), 0);
+ intc_reg_fns[_INTC_FN(handle)](addr, handle, 1);
+}
+
+void intc_balancing_disable(unsigned int irq)
+{
+ struct intc_desc_int *d = get_intc_desc(irq);
+ unsigned long handle = dist_handle[irq];
+ unsigned long addr;
+
+ if (irq_balancing_disabled(irq) || !handle)
+ return;
+
+ addr = INTC_REG(d, _INTC_ADDR_D(handle), 0);
+ intc_reg_fns[_INTC_FN(handle)](addr, handle, 0);
+}
+
+static unsigned int intc_dist_data(struct intc_desc *desc,
+ struct intc_desc_int *d,
+ intc_enum enum_id)
+{
+ struct intc_mask_reg *mr = desc->hw.mask_regs;
+ unsigned int i, j, fn, mode;
+ unsigned long reg_e, reg_d;
+
+ for (i = 0; mr && enum_id && i < desc->hw.nr_mask_regs; i++) {
+ mr = desc->hw.mask_regs + i;
+
+ /*
+ * Skip this entry if there's no auto-distribution
+ * register associated with it.
+ */
+ if (!mr->dist_reg)
+ continue;
+
+ for (j = 0; j < ARRAY_SIZE(mr->enum_ids); j++) {
+ if (mr->enum_ids[j] != enum_id)
+ continue;
+
+ fn = REG_FN_MODIFY_BASE;
+ mode = MODE_ENABLE_REG;
+ reg_e = mr->dist_reg;
+ reg_d = mr->dist_reg;
+
+ fn += (mr->reg_width >> 3) - 1;
+ return _INTC_MK(fn, mode,
+ intc_get_reg(d, reg_e),
+ intc_get_reg(d, reg_d),
+ 1,
+ (mr->reg_width - 1) - j);
+ }
+ }
+
+ /*
+ * It's possible we've gotten here with no distribution options
+ * available for the IRQ in question, so we just skip over those.
+ */
+ return 0;
+}
+
+void intc_set_dist_handle(unsigned int irq, struct intc_desc *desc,
+ struct intc_desc_int *d, intc_enum id)
+{
+ unsigned long flags;
+
+ /*
+ * Nothing to do for this IRQ.
+ */
+ if (!desc->hw.mask_regs)
+ return;
+
+ raw_spin_lock_irqsave(&intc_big_lock, flags);
+ dist_handle[irq] = intc_dist_data(desc, d, id);
+ raw_spin_unlock_irqrestore(&intc_big_lock, flags);
+}
--- /dev/null
+/*
+ * IRQ chip definitions for INTC IRQs.
+ *
+ * Copyright (C) 2007, 2008 Magnus Damm
+ * Copyright (C) 2009, 2010 Paul Mundt
+ *
+ * This file is subject to the terms and conditions of the GNU General Public
+ * License. See the file "COPYING" in the main directory of this archive
+ * for more details.
+ */
+#include <linux/cpumask.h>
+#include <linux/io.h>
+#include "internals.h"
+
+void _intc_enable(unsigned int irq, unsigned long handle)
+{
+ struct intc_desc_int *d = get_intc_desc(irq);
+ unsigned long addr;
+ unsigned int cpu;
+
+ for (cpu = 0; cpu < SMP_NR(d, _INTC_ADDR_E(handle)); cpu++) {
+#ifdef CONFIG_SMP
+ if (!cpumask_test_cpu(cpu, irq_to_desc(irq)->affinity))
+ continue;
+#endif
+ addr = INTC_REG(d, _INTC_ADDR_E(handle), cpu);
+ intc_enable_fns[_INTC_MODE(handle)](addr, handle, intc_reg_fns\
+ [_INTC_FN(handle)], irq);
+ }
+
+ intc_balancing_enable(irq);
+}
+
+static void intc_enable(unsigned int irq)
+{
+ _intc_enable(irq, (unsigned long)get_irq_chip_data(irq));
+}
+
+static void intc_disable(unsigned int irq)
+{
+ struct intc_desc_int *d = get_intc_desc(irq);
+ unsigned long handle = (unsigned long)get_irq_chip_data(irq);
+ unsigned long addr;
+ unsigned int cpu;
+
+ intc_balancing_disable(irq);
+
+ for (cpu = 0; cpu < SMP_NR(d, _INTC_ADDR_D(handle)); cpu++) {
+#ifdef CONFIG_SMP
+ if (!cpumask_test_cpu(cpu, irq_to_desc(irq)->affinity))
+ continue;
+#endif
+ addr = INTC_REG(d, _INTC_ADDR_D(handle), cpu);
+ intc_disable_fns[_INTC_MODE(handle)](addr, handle,intc_reg_fns\
+ [_INTC_FN(handle)], irq);
+ }
+}
+
+static int intc_set_wake(unsigned int irq, unsigned int on)
+{
+ return 0; /* allow wakeup, but setup hardware in intc_suspend() */
+}
+
+#ifdef CONFIG_SMP
+/*
+ * This is held with the irq desc lock held, so we don't require any
+ * additional locking here at the intc desc level. The affinity mask is
+ * later tested in the enable/disable paths.
+ */
+static int intc_set_affinity(unsigned int irq, const struct cpumask *cpumask)
+{
+ if (!cpumask_intersects(cpumask, cpu_online_mask))
+ return -1;
+
+ cpumask_copy(irq_to_desc(irq)->affinity, cpumask);
+
+ return 0;
+}
+#endif
+
+static void intc_mask_ack(unsigned int irq)
+{
+ struct intc_desc_int *d = get_intc_desc(irq);
+ unsigned long handle = intc_get_ack_handle(irq);
+ unsigned long addr;
+
+ intc_disable(irq);
+
+ /* read register and write zero only to the associated bit */
+ if (handle) {
+ unsigned int value;
+
+ addr = INTC_REG(d, _INTC_ADDR_D(handle), 0);
+ value = intc_set_field_from_handle(0, 1, handle);
+
+ switch (_INTC_FN(handle)) {
+ case REG_FN_MODIFY_BASE + 0: /* 8bit */
+ __raw_readb(addr);
+ __raw_writeb(0xff ^ value, addr);
+ break;
+ case REG_FN_MODIFY_BASE + 1: /* 16bit */
+ __raw_readw(addr);
+ __raw_writew(0xffff ^ value, addr);
+ break;
+ case REG_FN_MODIFY_BASE + 3: /* 32bit */
+ __raw_readl(addr);
+ __raw_writel(0xffffffff ^ value, addr);
+ break;
+ default:
+ BUG();
+ break;
+ }
+ }
+}
+
+static struct intc_handle_int *intc_find_irq(struct intc_handle_int *hp,
+ unsigned int nr_hp,
+ unsigned int irq)
+{
+ int i;
+
+ /*
+ * this doesn't scale well, but...
+ *
+ * this function should only be used for cerain uncommon
+ * operations such as intc_set_priority() and intc_set_type()
+ * and in those rare cases performance doesn't matter that much.
+ * keeping the memory footprint low is more important.
+ *
+ * one rather simple way to speed this up and still keep the
+ * memory footprint down is to make sure the array is sorted
+ * and then perform a bisect to lookup the irq.
+ */
+ for (i = 0; i < nr_hp; i++) {
+ if ((hp + i)->irq != irq)
+ continue;
+
+ return hp + i;
+ }
+
+ return NULL;
+}
+
+int intc_set_priority(unsigned int irq, unsigned int prio)
+{
+ struct intc_desc_int *d = get_intc_desc(irq);
+ struct intc_handle_int *ihp;
+
+ if (!intc_get_prio_level(irq) || prio <= 1)
+ return -EINVAL;
+
+ ihp = intc_find_irq(d->prio, d->nr_prio, irq);
+ if (ihp) {
+ if (prio >= (1 << _INTC_WIDTH(ihp->handle)))
+ return -EINVAL;
+
+ intc_set_prio_level(irq, prio);
+
+ /*
+ * only set secondary masking method directly
+ * primary masking method is using intc_prio_level[irq]
+ * priority level will be set during next enable()
+ */
+ if (_INTC_FN(ihp->handle) != REG_FN_ERR)
+ _intc_enable(irq, ihp->handle);
+ }
+ return 0;
+}
+
+#define VALID(x) (x | 0x80)
+
+static unsigned char intc_irq_sense_table[IRQ_TYPE_SENSE_MASK + 1] = {
+ [IRQ_TYPE_EDGE_FALLING] = VALID(0),
+ [IRQ_TYPE_EDGE_RISING] = VALID(1),
+ [IRQ_TYPE_LEVEL_LOW] = VALID(2),
+ /* SH7706, SH7707 and SH7709 do not support high level triggered */
+#if !defined(CONFIG_CPU_SUBTYPE_SH7706) && \
+ !defined(CONFIG_CPU_SUBTYPE_SH7707) && \
+ !defined(CONFIG_CPU_SUBTYPE_SH7709)
+ [IRQ_TYPE_LEVEL_HIGH] = VALID(3),
+#endif
+};
+
+static int intc_set_type(unsigned int irq, unsigned int type)
+{
+ struct intc_desc_int *d = get_intc_desc(irq);
+ unsigned char value = intc_irq_sense_table[type & IRQ_TYPE_SENSE_MASK];
+ struct intc_handle_int *ihp;
+ unsigned long addr;
+
+ if (!value)
+ return -EINVAL;
+
+ ihp = intc_find_irq(d->sense, d->nr_sense, irq);
+ if (ihp) {
+ addr = INTC_REG(d, _INTC_ADDR_E(ihp->handle), 0);
+ intc_reg_fns[_INTC_FN(ihp->handle)](addr, ihp->handle, value);
+ }
+
+ return 0;
+}
+
+struct irq_chip intc_irq_chip = {
+ .mask = intc_disable,
+ .unmask = intc_enable,
+ .mask_ack = intc_mask_ack,
+ .enable = intc_enable,
+ .disable = intc_disable,
+ .shutdown = intc_disable,
+ .set_type = intc_set_type,
+ .set_wake = intc_set_wake,
+#ifdef CONFIG_SMP
+ .set_affinity = intc_set_affinity,
+#endif
+};
--- /dev/null
+/*
+ * Shared interrupt handling code for IPR and INTC2 types of IRQs.
+ *
+ * Copyright (C) 2007, 2008 Magnus Damm
+ * Copyright (C) 2009, 2010 Paul Mundt
+ *
+ * Based on intc2.c and ipr.c
+ *
+ * Copyright (C) 1999 Niibe Yutaka & Takeshi Yaegashi
+ * Copyright (C) 2000 Kazumoto Kojima
+ * Copyright (C) 2001 David J. Mckay (david.mckay@st.com)
+ * Copyright (C) 2003 Takashi Kusuda <kusuda-takashi@hitachi-ul.co.jp>
+ * Copyright (C) 2005, 2006 Paul Mundt
+ *
+ * This file is subject to the terms and conditions of the GNU General Public
+ * License. See the file "COPYING" in the main directory of this archive
+ * for more details.
+ */
+#define pr_fmt(fmt) "intc: " fmt
+
+#include <linux/init.h>
+#include <linux/irq.h>
+#include <linux/io.h>
+#include <linux/slab.h>
+#include <linux/interrupt.h>
+#include <linux/sh_intc.h>
+#include <linux/sysdev.h>
+#include <linux/list.h>
+#include <linux/spinlock.h>
+#include <linux/radix-tree.h>
+#include "internals.h"
+
+LIST_HEAD(intc_list);
+DEFINE_RAW_SPINLOCK(intc_big_lock);
+unsigned int nr_intc_controllers;
+
+/*
+ * Default priority level
+ * - this needs to be at least 2 for 5-bit priorities on 7780
+ */
+static unsigned int default_prio_level = 2; /* 2 - 16 */
+static unsigned int intc_prio_level[NR_IRQS]; /* for now */
+
+unsigned int intc_get_dfl_prio_level(void)
+{
+ return default_prio_level;
+}
+
+unsigned int intc_get_prio_level(unsigned int irq)
+{
+ return intc_prio_level[irq];
+}
+
+void intc_set_prio_level(unsigned int irq, unsigned int level)
+{
+ unsigned long flags;
+
+ raw_spin_lock_irqsave(&intc_big_lock, flags);
+ intc_prio_level[irq] = level;
+ raw_spin_unlock_irqrestore(&intc_big_lock, flags);
+}
+
+static void intc_redirect_irq(unsigned int irq, struct irq_desc *desc)
+{
+ generic_handle_irq((unsigned int)get_irq_data(irq));
+}
+
+static void __init intc_register_irq(struct intc_desc *desc,
+ struct intc_desc_int *d,
+ intc_enum enum_id,
+ unsigned int irq)
+{
+ struct intc_handle_int *hp;
+ unsigned int data[2], primary;
+ unsigned long flags;
+
+ /*
+ * Register the IRQ position with the global IRQ map, then insert
+ * it in to the radix tree.
+ */
+ reserve_irq_vector(irq);
+
+ raw_spin_lock_irqsave(&intc_big_lock, flags);
+ radix_tree_insert(&d->tree, enum_id, intc_irq_xlate_get(irq));
+ raw_spin_unlock_irqrestore(&intc_big_lock, flags);
+
+ /*
+ * Prefer single interrupt source bitmap over other combinations:
+ *
+ * 1. bitmap, single interrupt source
+ * 2. priority, single interrupt source
+ * 3. bitmap, multiple interrupt sources (groups)
+ * 4. priority, multiple interrupt sources (groups)
+ */
+ data[0] = intc_get_mask_handle(desc, d, enum_id, 0);
+ data[1] = intc_get_prio_handle(desc, d, enum_id, 0);
+
+ primary = 0;
+ if (!data[0] && data[1])
+ primary = 1;
+
+ if (!data[0] && !data[1])
+ pr_warning("missing unique irq mask for irq %d (vect 0x%04x)\n",
+ irq, irq2evt(irq));
+
+ data[0] = data[0] ? data[0] : intc_get_mask_handle(desc, d, enum_id, 1);
+ data[1] = data[1] ? data[1] : intc_get_prio_handle(desc, d, enum_id, 1);
+
+ if (!data[primary])
+ primary ^= 1;
+
+ BUG_ON(!data[primary]); /* must have primary masking method */
+
+ disable_irq_nosync(irq);
+ set_irq_chip_and_handler_name(irq, &d->chip,
+ handle_level_irq, "level");
+ set_irq_chip_data(irq, (void *)data[primary]);
+
+ /*
+ * set priority level
+ */
+ intc_set_prio_level(irq, intc_get_dfl_prio_level());
+
+ /* enable secondary masking method if present */
+ if (data[!primary])
+ _intc_enable(irq, data[!primary]);
+
+ /* add irq to d->prio list if priority is available */
+ if (data[1]) {
+ hp = d->prio + d->nr_prio;
+ hp->irq = irq;
+ hp->handle = data[1];
+
+ if (primary) {
+ /*
+ * only secondary priority should access registers, so
+ * set _INTC_FN(h) = REG_FN_ERR for intc_set_priority()
+ */
+ hp->handle &= ~_INTC_MK(0x0f, 0, 0, 0, 0, 0);
+ hp->handle |= _INTC_MK(REG_FN_ERR, 0, 0, 0, 0, 0);
+ }
+ d->nr_prio++;
+ }
+
+ /* add irq to d->sense list if sense is available */
+ data[0] = intc_get_sense_handle(desc, d, enum_id);
+ if (data[0]) {
+ (d->sense + d->nr_sense)->irq = irq;
+ (d->sense + d->nr_sense)->handle = data[0];
+ d->nr_sense++;
+ }
+
+ /* irq should be disabled by default */
+ d->chip.mask(irq);
+
+ intc_set_ack_handle(irq, desc, d, enum_id);
+ intc_set_dist_handle(irq, desc, d, enum_id);
+
+ activate_irq(irq);
+}
+
+static unsigned int __init save_reg(struct intc_desc_int *d,
+ unsigned int cnt,
+ unsigned long value,
+ unsigned int smp)
+{
+ if (value) {
+ value = intc_phys_to_virt(d, value);
+
+ d->reg[cnt] = value;
+#ifdef CONFIG_SMP
+ d->smp[cnt] = smp;
+#endif
+ return 1;
+ }
+
+ return 0;
+}
+
+int __init register_intc_controller(struct intc_desc *desc)
+{
+ unsigned int i, k, smp;
+ struct intc_hw_desc *hw = &desc->hw;
+ struct intc_desc_int *d;
+ struct resource *res;
+
+ pr_info("Registered controller '%s' with %u IRQs\n",
+ desc->name, hw->nr_vectors);
+
+ d = kzalloc(sizeof(*d), GFP_NOWAIT);
+ if (!d)
+ goto err0;
+
+ INIT_LIST_HEAD(&d->list);
+ list_add_tail(&d->list, &intc_list);
+
+ raw_spin_lock_init(&d->lock);
+
+ d->index = nr_intc_controllers;
+
+ if (desc->num_resources) {
+ d->nr_windows = desc->num_resources;
+ d->window = kzalloc(d->nr_windows * sizeof(*d->window),
+ GFP_NOWAIT);
+ if (!d->window)
+ goto err1;
+
+ for (k = 0; k < d->nr_windows; k++) {
+ res = desc->resource + k;
+ WARN_ON(resource_type(res) != IORESOURCE_MEM);
+ d->window[k].phys = res->start;
+ d->window[k].size = resource_size(res);
+ d->window[k].virt = ioremap_nocache(res->start,
+ resource_size(res));
+ if (!d->window[k].virt)
+ goto err2;
+ }
+ }
+
+ d->nr_reg = hw->mask_regs ? hw->nr_mask_regs * 2 : 0;
+#ifdef CONFIG_INTC_BALANCING
+ if (d->nr_reg)
+ d->nr_reg += hw->nr_mask_regs;
+#endif
+ d->nr_reg += hw->prio_regs ? hw->nr_prio_regs * 2 : 0;
+ d->nr_reg += hw->sense_regs ? hw->nr_sense_regs : 0;
+ d->nr_reg += hw->ack_regs ? hw->nr_ack_regs : 0;
+ d->nr_reg += hw->subgroups ? hw->nr_subgroups : 0;
+
+ d->reg = kzalloc(d->nr_reg * sizeof(*d->reg), GFP_NOWAIT);
+ if (!d->reg)
+ goto err2;
+
+#ifdef CONFIG_SMP
+ d->smp = kzalloc(d->nr_reg * sizeof(*d->smp), GFP_NOWAIT);
+ if (!d->smp)
+ goto err3;
+#endif
+ k = 0;
+
+ if (hw->mask_regs) {
+ for (i = 0; i < hw->nr_mask_regs; i++) {
+ smp = IS_SMP(hw->mask_regs[i]);
+ k += save_reg(d, k, hw->mask_regs[i].set_reg, smp);
+ k += save_reg(d, k, hw->mask_regs[i].clr_reg, smp);
+#ifdef CONFIG_INTC_BALANCING
+ k += save_reg(d, k, hw->mask_regs[i].dist_reg, 0);
+#endif
+ }
+ }
+
+ if (hw->prio_regs) {
+ d->prio = kzalloc(hw->nr_vectors * sizeof(*d->prio),
+ GFP_NOWAIT);
+ if (!d->prio)
+ goto err4;
+
+ for (i = 0; i < hw->nr_prio_regs; i++) {
+ smp = IS_SMP(hw->prio_regs[i]);
+ k += save_reg(d, k, hw->prio_regs[i].set_reg, smp);
+ k += save_reg(d, k, hw->prio_regs[i].clr_reg, smp);
+ }
+ }
+
+ if (hw->sense_regs) {
+ d->sense = kzalloc(hw->nr_vectors * sizeof(*d->sense),
+ GFP_NOWAIT);
+ if (!d->sense)
+ goto err5;
+
+ for (i = 0; i < hw->nr_sense_regs; i++)
+ k += save_reg(d, k, hw->sense_regs[i].reg, 0);
+ }
+
+ if (hw->subgroups)
+ for (i = 0; i < hw->nr_subgroups; i++)
+ if (hw->subgroups[i].reg)
+ k+= save_reg(d, k, hw->subgroups[i].reg, 0);
+
+ memcpy(&d->chip, &intc_irq_chip, sizeof(struct irq_chip));
+ d->chip.name = desc->name;
+
+ if (hw->ack_regs)
+ for (i = 0; i < hw->nr_ack_regs; i++)
+ k += save_reg(d, k, hw->ack_regs[i].set_reg, 0);
+ else
+ d->chip.mask_ack = d->chip.disable;
+
+ /* disable bits matching force_disable before registering irqs */
+ if (desc->force_disable)
+ intc_enable_disable_enum(desc, d, desc->force_disable, 0);
+
+ /* disable bits matching force_enable before registering irqs */
+ if (desc->force_enable)
+ intc_enable_disable_enum(desc, d, desc->force_enable, 0);
+
+ BUG_ON(k > 256); /* _INTC_ADDR_E() and _INTC_ADDR_D() are 8 bits */
+
+ /* register the vectors one by one */
+ for (i = 0; i < hw->nr_vectors; i++) {
+ struct intc_vect *vect = hw->vectors + i;
+ unsigned int irq = evt2irq(vect->vect);
+ struct irq_desc *irq_desc;
+
+ if (!vect->enum_id)
+ continue;
+
+ irq_desc = irq_to_desc_alloc_node(irq, numa_node_id());
+ if (unlikely(!irq_desc)) {
+ pr_err("can't get irq_desc for %d\n", irq);
+ continue;
+ }
+
+ intc_irq_xlate_set(irq, vect->enum_id, d);
+ intc_register_irq(desc, d, vect->enum_id, irq);
+
+ for (k = i + 1; k < hw->nr_vectors; k++) {
+ struct intc_vect *vect2 = hw->vectors + k;
+ unsigned int irq2 = evt2irq(vect2->vect);
+
+ if (vect->enum_id != vect2->enum_id)
+ continue;
+
+ /*
+ * In the case of multi-evt handling and sparse
+ * IRQ support, each vector still needs to have
+ * its own backing irq_desc.
+ */
+ irq_desc = irq_to_desc_alloc_node(irq2, numa_node_id());
+ if (unlikely(!irq_desc)) {
+ pr_err("can't get irq_desc for %d\n", irq2);
+ continue;
+ }
+
+ vect2->enum_id = 0;
+
+ /* redirect this interrupts to the first one */
+ set_irq_chip(irq2, &dummy_irq_chip);
+ set_irq_chained_handler(irq2, intc_redirect_irq);
+ set_irq_data(irq2, (void *)irq);
+ }
+ }
+
+ intc_subgroup_init(desc, d);
+
+ /* enable bits matching force_enable after registering irqs */
+ if (desc->force_enable)
+ intc_enable_disable_enum(desc, d, desc->force_enable, 1);
+
+ nr_intc_controllers++;
+
+ return 0;
+err5:
+ kfree(d->prio);
+err4:
+#ifdef CONFIG_SMP
+ kfree(d->smp);
+err3:
+#endif
+ kfree(d->reg);
+err2:
+ for (k = 0; k < d->nr_windows; k++)
+ if (d->window[k].virt)
+ iounmap(d->window[k].virt);
+
+ kfree(d->window);
+err1:
+ kfree(d);
+err0:
+ pr_err("unable to allocate INTC memory\n");
+
+ return -ENOMEM;
+}
+
+static ssize_t
+show_intc_name(struct sys_device *dev, struct sysdev_attribute *attr, char *buf)
+{
+ struct intc_desc_int *d;
+
+ d = container_of(dev, struct intc_desc_int, sysdev);
+
+ return sprintf(buf, "%s\n", d->chip.name);
+}
+
+static SYSDEV_ATTR(name, S_IRUGO, show_intc_name, NULL);
+
+static int intc_suspend(struct sys_device *dev, pm_message_t state)
+{
+ struct intc_desc_int *d;
+ struct irq_desc *desc;
+ int irq;
+
+ /* get intc controller associated with this sysdev */
+ d = container_of(dev, struct intc_desc_int, sysdev);
+
+ switch (state.event) {
+ case PM_EVENT_ON:
+ if (d->state.event != PM_EVENT_FREEZE)
+ break;
+
+ for_each_irq_desc(irq, desc) {
+ /*
+ * This will catch the redirect and VIRQ cases
+ * due to the dummy_irq_chip being inserted.
+ */
+ if (desc->chip != &d->chip)
+ continue;
+ if (desc->status & IRQ_DISABLED)
+ desc->chip->disable(irq);
+ else
+ desc->chip->enable(irq);
+ }
+ break;
+ case PM_EVENT_FREEZE:
+ /* nothing has to be done */
+ break;
+ case PM_EVENT_SUSPEND:
+ /* enable wakeup irqs belonging to this intc controller */
+ for_each_irq_desc(irq, desc) {
+ if (desc->chip != &d->chip)
+ continue;
+ if ((desc->status & IRQ_WAKEUP))
+ desc->chip->enable(irq);
+ }
+ break;
+ }
+
+ d->state = state;
+
+ return 0;
+}
+
+static int intc_resume(struct sys_device *dev)
+{
+ return intc_suspend(dev, PMSG_ON);
+}
+
+struct sysdev_class intc_sysdev_class = {
+ .name = "intc",
+ .suspend = intc_suspend,
+ .resume = intc_resume,
+};
+
+/* register this intc as sysdev to allow suspend/resume */
+static int __init register_intc_sysdevs(void)
+{
+ struct intc_desc_int *d;
+ int error;
+
+ error = sysdev_class_register(&intc_sysdev_class);
+ if (!error) {
+ list_for_each_entry(d, &intc_list, list) {
+ d->sysdev.id = d->index;
+ d->sysdev.cls = &intc_sysdev_class;
+ error = sysdev_register(&d->sysdev);
+ if (error == 0)
+ error = sysdev_create_file(&d->sysdev,
+ &attr_name);
+ if (error)
+ break;
+ }
+ }
+
+ if (error)
+ pr_err("sysdev registration error\n");
+
+ return error;
+}
+device_initcall(register_intc_sysdevs);
--- /dev/null
+/*
+ * Dynamic IRQ management
+ *
+ * Copyright (C) 2010 Paul Mundt
+ *
+ * Modelled after arch/x86/kernel/apic/io_apic.c
+ *
+ * This file is subject to the terms and conditions of the GNU General Public
+ * License. See the file "COPYING" in the main directory of this archive
+ * for more details.
+ */
+#define pr_fmt(fmt) "intc: " fmt
+
+#include <linux/irq.h>
+#include <linux/bitmap.h>
+#include <linux/spinlock.h>
+#include "internals.h" /* only for activate_irq() damage.. */
+
+/*
+ * The intc_irq_map provides a global map of bound IRQ vectors for a
+ * given platform. Allocation of IRQs are either static through the CPU
+ * vector map, or dynamic in the case of board mux vectors or MSI.
+ *
+ * As this is a central point for all IRQ controllers on the system,
+ * each of the available sources are mapped out here. This combined with
+ * sparseirq makes it quite trivial to keep the vector map tightly packed
+ * when dynamically creating IRQs, as well as tying in to otherwise
+ * unused irq_desc positions in the sparse array.
+ */
+static DECLARE_BITMAP(intc_irq_map, NR_IRQS);
+static DEFINE_RAW_SPINLOCK(vector_lock);
+
+/*
+ * Dynamic IRQ allocation and deallocation
+ */
+unsigned int create_irq_nr(unsigned int irq_want, int node)
+{
+ unsigned int irq = 0, new;
+ unsigned long flags;
+ struct irq_desc *desc;
+
+ raw_spin_lock_irqsave(&vector_lock, flags);
+
+ /*
+ * First try the wanted IRQ
+ */
+ if (test_and_set_bit(irq_want, intc_irq_map) == 0) {
+ new = irq_want;
+ } else {
+ /* .. then fall back to scanning. */
+ new = find_first_zero_bit(intc_irq_map, nr_irqs);
+ if (unlikely(new == nr_irqs))
+ goto out_unlock;
+
+ __set_bit(new, intc_irq_map);
+ }
+
+ desc = irq_to_desc_alloc_node(new, node);
+ if (unlikely(!desc)) {
+ pr_err("can't get irq_desc for %d\n", new);
+ goto out_unlock;
+ }
+
+ desc = move_irq_desc(desc, node);
+ irq = new;
+
+out_unlock:
+ raw_spin_unlock_irqrestore(&vector_lock, flags);
+
+ if (irq > 0) {
+ dynamic_irq_init(irq);
+ activate_irq(irq);
+ }
+
+ return irq;
+}
+
+int create_irq(void)
+{
+ int nid = cpu_to_node(smp_processor_id());
+ int irq;
+
+ irq = create_irq_nr(NR_IRQS_LEGACY, nid);
+ if (irq == 0)
+ irq = -1;
+
+ return irq;
+}
+
+void destroy_irq(unsigned int irq)
+{
+ unsigned long flags;
+
+ dynamic_irq_cleanup(irq);
+
+ raw_spin_lock_irqsave(&vector_lock, flags);
+ __clear_bit(irq, intc_irq_map);
+ raw_spin_unlock_irqrestore(&vector_lock, flags);
+}
+
+int reserve_irq_vector(unsigned int irq)
+{
+ unsigned long flags;
+ int ret = 0;
+
+ raw_spin_lock_irqsave(&vector_lock, flags);
+ if (test_and_set_bit(irq, intc_irq_map))
+ ret = -EBUSY;
+ raw_spin_unlock_irqrestore(&vector_lock, flags);
+
+ return ret;
+}
+
+void reserve_intc_vectors(struct intc_vect *vectors, unsigned int nr_vecs)
+{
+ unsigned long flags;
+ int i;
+
+ raw_spin_lock_irqsave(&vector_lock, flags);
+ for (i = 0; i < nr_vecs; i++)
+ __set_bit(evt2irq(vectors[i].vect), intc_irq_map);
+ raw_spin_unlock_irqrestore(&vector_lock, flags);
+}
+
+void reserve_irq_legacy(void)
+{
+ unsigned long flags;
+ int i, j;
+
+ raw_spin_lock_irqsave(&vector_lock, flags);
+ j = find_first_bit(intc_irq_map, nr_irqs);
+ for (i = 0; i < j; i++)
+ __set_bit(i, intc_irq_map);
+ raw_spin_unlock_irqrestore(&vector_lock, flags);
+}
--- /dev/null
+/*
+ * Shared interrupt handling code for IPR and INTC2 types of IRQs.
+ *
+ * Copyright (C) 2007, 2008 Magnus Damm
+ * Copyright (C) 2009, 2010 Paul Mundt
+ *
+ * This file is subject to the terms and conditions of the GNU General Public
+ * License. See the file "COPYING" in the main directory of this archive
+ * for more details.
+ */
+#include <linux/init.h>
+#include <linux/irq.h>
+#include <linux/spinlock.h>
+#include "internals.h"
+
+static unsigned long ack_handle[NR_IRQS];
+
+static intc_enum __init intc_grp_id(struct intc_desc *desc,
+ intc_enum enum_id)
+{
+ struct intc_group *g = desc->hw.groups;
+ unsigned int i, j;
+
+ for (i = 0; g && enum_id && i < desc->hw.nr_groups; i++) {
+ g = desc->hw.groups + i;
+
+ for (j = 0; g->enum_ids[j]; j++) {
+ if (g->enum_ids[j] != enum_id)
+ continue;
+
+ return g->enum_id;
+ }
+ }
+
+ return 0;
+}
+
+static unsigned int __init _intc_mask_data(struct intc_desc *desc,
+ struct intc_desc_int *d,
+ intc_enum enum_id,
+ unsigned int *reg_idx,
+ unsigned int *fld_idx)
+{
+ struct intc_mask_reg *mr = desc->hw.mask_regs;
+ unsigned int fn, mode;
+ unsigned long reg_e, reg_d;
+
+ while (mr && enum_id && *reg_idx < desc->hw.nr_mask_regs) {
+ mr = desc->hw.mask_regs + *reg_idx;
+
+ for (; *fld_idx < ARRAY_SIZE(mr->enum_ids); (*fld_idx)++) {
+ if (mr->enum_ids[*fld_idx] != enum_id)
+ continue;
+
+ if (mr->set_reg && mr->clr_reg) {
+ fn = REG_FN_WRITE_BASE;
+ mode = MODE_DUAL_REG;
+ reg_e = mr->clr_reg;
+ reg_d = mr->set_reg;
+ } else {
+ fn = REG_FN_MODIFY_BASE;
+ if (mr->set_reg) {
+ mode = MODE_ENABLE_REG;
+ reg_e = mr->set_reg;
+ reg_d = mr->set_reg;
+ } else {
+ mode = MODE_MASK_REG;
+ reg_e = mr->clr_reg;
+ reg_d = mr->clr_reg;
+ }
+ }
+
+ fn += (mr->reg_width >> 3) - 1;
+ return _INTC_MK(fn, mode,
+ intc_get_reg(d, reg_e),
+ intc_get_reg(d, reg_d),
+ 1,
+ (mr->reg_width - 1) - *fld_idx);
+ }
+
+ *fld_idx = 0;
+ (*reg_idx)++;
+ }
+
+ return 0;
+}
+
+unsigned int __init
+intc_get_mask_handle(struct intc_desc *desc, struct intc_desc_int *d,
+ intc_enum enum_id, int do_grps)
+{
+ unsigned int i = 0;
+ unsigned int j = 0;
+ unsigned int ret;
+
+ ret = _intc_mask_data(desc, d, enum_id, &i, &j);
+ if (ret)
+ return ret;
+
+ if (do_grps)
+ return intc_get_mask_handle(desc, d, intc_grp_id(desc, enum_id), 0);
+
+ return 0;
+}
+
+static unsigned int __init _intc_prio_data(struct intc_desc *desc,
+ struct intc_desc_int *d,
+ intc_enum enum_id,
+ unsigned int *reg_idx,
+ unsigned int *fld_idx)
+{
+ struct intc_prio_reg *pr = desc->hw.prio_regs;
+ unsigned int fn, n, mode, bit;
+ unsigned long reg_e, reg_d;
+
+ while (pr && enum_id && *reg_idx < desc->hw.nr_prio_regs) {
+ pr = desc->hw.prio_regs + *reg_idx;
+
+ for (; *fld_idx < ARRAY_SIZE(pr->enum_ids); (*fld_idx)++) {
+ if (pr->enum_ids[*fld_idx] != enum_id)
+ continue;
+
+ if (pr->set_reg && pr->clr_reg) {
+ fn = REG_FN_WRITE_BASE;
+ mode = MODE_PCLR_REG;
+ reg_e = pr->set_reg;
+ reg_d = pr->clr_reg;
+ } else {
+ fn = REG_FN_MODIFY_BASE;
+ mode = MODE_PRIO_REG;
+ if (!pr->set_reg)
+ BUG();
+ reg_e = pr->set_reg;
+ reg_d = pr->set_reg;
+ }
+
+ fn += (pr->reg_width >> 3) - 1;
+ n = *fld_idx + 1;
+
+ BUG_ON(n * pr->field_width > pr->reg_width);
+
+ bit = pr->reg_width - (n * pr->field_width);
+
+ return _INTC_MK(fn, mode,
+ intc_get_reg(d, reg_e),
+ intc_get_reg(d, reg_d),
+ pr->field_width, bit);
+ }
+
+ *fld_idx = 0;
+ (*reg_idx)++;
+ }
+
+ return 0;
+}
+
+unsigned int __init
+intc_get_prio_handle(struct intc_desc *desc, struct intc_desc_int *d,
+ intc_enum enum_id, int do_grps)
+{
+ unsigned int i = 0;
+ unsigned int j = 0;
+ unsigned int ret;
+
+ ret = _intc_prio_data(desc, d, enum_id, &i, &j);
+ if (ret)
+ return ret;
+
+ if (do_grps)
+ return intc_get_prio_handle(desc, d, intc_grp_id(desc, enum_id), 0);
+
+ return 0;
+}
+
+static unsigned int __init intc_ack_data(struct intc_desc *desc,
+ struct intc_desc_int *d,
+ intc_enum enum_id)
+{
+ struct intc_mask_reg *mr = desc->hw.ack_regs;
+ unsigned int i, j, fn, mode;
+ unsigned long reg_e, reg_d;
+
+ for (i = 0; mr && enum_id && i < desc->hw.nr_ack_regs; i++) {
+ mr = desc->hw.ack_regs + i;
+
+ for (j = 0; j < ARRAY_SIZE(mr->enum_ids); j++) {
+ if (mr->enum_ids[j] != enum_id)
+ continue;
+
+ fn = REG_FN_MODIFY_BASE;
+ mode = MODE_ENABLE_REG;
+ reg_e = mr->set_reg;
+ reg_d = mr->set_reg;
+
+ fn += (mr->reg_width >> 3) - 1;
+ return _INTC_MK(fn, mode,
+ intc_get_reg(d, reg_e),
+ intc_get_reg(d, reg_d),
+ 1,
+ (mr->reg_width - 1) - j);
+ }
+ }
+
+ return 0;
+}
+
+static void intc_enable_disable(struct intc_desc_int *d,
+ unsigned long handle, int do_enable)
+{
+ unsigned long addr;
+ unsigned int cpu;
+ unsigned long (*fn)(unsigned long, unsigned long,
+ unsigned long (*)(unsigned long, unsigned long,
+ unsigned long),
+ unsigned int);
+
+ if (do_enable) {
+ for (cpu = 0; cpu < SMP_NR(d, _INTC_ADDR_E(handle)); cpu++) {
+ addr = INTC_REG(d, _INTC_ADDR_E(handle), cpu);
+ fn = intc_enable_noprio_fns[_INTC_MODE(handle)];
+ fn(addr, handle, intc_reg_fns[_INTC_FN(handle)], 0);
+ }
+ } else {
+ for (cpu = 0; cpu < SMP_NR(d, _INTC_ADDR_D(handle)); cpu++) {
+ addr = INTC_REG(d, _INTC_ADDR_D(handle), cpu);
+ fn = intc_disable_fns[_INTC_MODE(handle)];
+ fn(addr, handle, intc_reg_fns[_INTC_FN(handle)], 0);
+ }
+ }
+}
+
+void __init intc_enable_disable_enum(struct intc_desc *desc,
+ struct intc_desc_int *d,
+ intc_enum enum_id, int enable)
+{
+ unsigned int i, j, data;
+
+ /* go through and enable/disable all mask bits */
+ i = j = 0;
+ do {
+ data = _intc_mask_data(desc, d, enum_id, &i, &j);
+ if (data)
+ intc_enable_disable(d, data, enable);
+ j++;
+ } while (data);
+
+ /* go through and enable/disable all priority fields */
+ i = j = 0;
+ do {
+ data = _intc_prio_data(desc, d, enum_id, &i, &j);
+ if (data)
+ intc_enable_disable(d, data, enable);
+
+ j++;
+ } while (data);
+}
+
+unsigned int __init
+intc_get_sense_handle(struct intc_desc *desc, struct intc_desc_int *d,
+ intc_enum enum_id)
+{
+ struct intc_sense_reg *sr = desc->hw.sense_regs;
+ unsigned int i, j, fn, bit;
+
+ for (i = 0; sr && enum_id && i < desc->hw.nr_sense_regs; i++) {
+ sr = desc->hw.sense_regs + i;
+
+ for (j = 0; j < ARRAY_SIZE(sr->enum_ids); j++) {
+ if (sr->enum_ids[j] != enum_id)
+ continue;
+
+ fn = REG_FN_MODIFY_BASE;
+ fn += (sr->reg_width >> 3) - 1;
+
+ BUG_ON((j + 1) * sr->field_width > sr->reg_width);
+
+ bit = sr->reg_width - ((j + 1) * sr->field_width);
+
+ return _INTC_MK(fn, 0, intc_get_reg(d, sr->reg),
+ 0, sr->field_width, bit);
+ }
+ }
+
+ return 0;
+}
+
+
+void intc_set_ack_handle(unsigned int irq, struct intc_desc *desc,
+ struct intc_desc_int *d, intc_enum id)
+{
+ unsigned long flags;
+
+ /*
+ * Nothing to do for this IRQ.
+ */
+ if (!desc->hw.ack_regs)
+ return;
+
+ raw_spin_lock_irqsave(&intc_big_lock, flags);
+ ack_handle[irq] = intc_ack_data(desc, d, id);
+ raw_spin_unlock_irqrestore(&intc_big_lock, flags);
+}
+
+unsigned long intc_get_ack_handle(unsigned int irq)
+{
+ return ack_handle[irq];
+}
--- /dev/null
+#include <linux/sh_intc.h>
+#include <linux/irq.h>
+#include <linux/list.h>
+#include <linux/kernel.h>
+#include <linux/types.h>
+#include <linux/radix-tree.h>
+#include <linux/sysdev.h>
+
+#define _INTC_MK(fn, mode, addr_e, addr_d, width, shift) \
+ ((shift) | ((width) << 5) | ((fn) << 9) | ((mode) << 13) | \
+ ((addr_e) << 16) | ((addr_d << 24)))
+
+#define _INTC_SHIFT(h) (h & 0x1f)
+#define _INTC_WIDTH(h) ((h >> 5) & 0xf)
+#define _INTC_FN(h) ((h >> 9) & 0xf)
+#define _INTC_MODE(h) ((h >> 13) & 0x7)
+#define _INTC_ADDR_E(h) ((h >> 16) & 0xff)
+#define _INTC_ADDR_D(h) ((h >> 24) & 0xff)
+
+#ifdef CONFIG_SMP
+#define IS_SMP(x) (x.smp)
+#define INTC_REG(d, x, c) (d->reg[(x)] + ((d->smp[(x)] & 0xff) * c))
+#define SMP_NR(d, x) ((d->smp[(x)] >> 8) ? (d->smp[(x)] >> 8) : 1)
+#else
+#define IS_SMP(x) 0
+#define INTC_REG(d, x, c) (d->reg[(x)])
+#define SMP_NR(d, x) 1
+#endif
+
+struct intc_handle_int {
+ unsigned int irq;
+ unsigned long handle;
+};
+
+struct intc_window {
+ phys_addr_t phys;
+ void __iomem *virt;
+ unsigned long size;
+};
+
+struct intc_map_entry {
+ intc_enum enum_id;
+ struct intc_desc_int *desc;
+};
+
+struct intc_subgroup_entry {
+ unsigned int pirq;
+ intc_enum enum_id;
+ unsigned long handle;
+};
+
+struct intc_desc_int {
+ struct list_head list;
+ struct sys_device sysdev;
+ struct radix_tree_root tree;
+ pm_message_t state;
+ raw_spinlock_t lock;
+ unsigned int index;
+ unsigned long *reg;
+#ifdef CONFIG_SMP
+ unsigned long *smp;
+#endif
+ unsigned int nr_reg;
+ struct intc_handle_int *prio;
+ unsigned int nr_prio;
+ struct intc_handle_int *sense;
+ unsigned int nr_sense;
+ struct intc_window *window;
+ unsigned int nr_windows;
+ struct irq_chip chip;
+};
+
+
+enum {
+ REG_FN_ERR = 0,
+ REG_FN_TEST_BASE = 1,
+ REG_FN_WRITE_BASE = 5,
+ REG_FN_MODIFY_BASE = 9
+};
+
+enum { MODE_ENABLE_REG = 0, /* Bit(s) set -> interrupt enabled */
+ MODE_MASK_REG, /* Bit(s) set -> interrupt disabled */
+ MODE_DUAL_REG, /* Two registers, set bit to enable / disable */
+ MODE_PRIO_REG, /* Priority value written to enable interrupt */
+ MODE_PCLR_REG, /* Above plus all bits set to disable interrupt */
+};
+
+static inline struct intc_desc_int *get_intc_desc(unsigned int irq)
+{
+ struct irq_chip *chip = get_irq_chip(irq);
+
+ return container_of(chip, struct intc_desc_int, chip);
+}
+
+/*
+ * Grumble.
+ */
+static inline void activate_irq(int irq)
+{
+#ifdef CONFIG_ARM
+ /* ARM requires an extra step to clear IRQ_NOREQUEST, which it
+ * sets on behalf of every irq_chip. Also sets IRQ_NOPROBE.
+ */
+ set_irq_flags(irq, IRQF_VALID);
+#else
+ /* same effect on other architectures */
+ set_irq_noprobe(irq);
+#endif
+}
+
+/* access.c */
+extern unsigned long
+(*intc_reg_fns[])(unsigned long addr, unsigned long h, unsigned long data);
+
+extern unsigned long
+(*intc_enable_fns[])(unsigned long addr, unsigned long handle,
+ unsigned long (*fn)(unsigned long,
+ unsigned long, unsigned long),
+ unsigned int irq);
+extern unsigned long
+(*intc_disable_fns[])(unsigned long addr, unsigned long handle,
+ unsigned long (*fn)(unsigned long,
+ unsigned long, unsigned long),
+ unsigned int irq);
+extern unsigned long
+(*intc_enable_noprio_fns[])(unsigned long addr, unsigned long handle,
+ unsigned long (*fn)(unsigned long,
+ unsigned long, unsigned long),
+ unsigned int irq);
+
+unsigned long intc_phys_to_virt(struct intc_desc_int *d, unsigned long address);
+unsigned int intc_get_reg(struct intc_desc_int *d, unsigned long address);
+unsigned int intc_set_field_from_handle(unsigned int value,
+ unsigned int field_value,
+ unsigned int handle);
+unsigned long intc_get_field_from_handle(unsigned int value,
+ unsigned int handle);
+
+/* balancing.c */
+#ifdef CONFIG_INTC_BALANCING
+void intc_balancing_enable(unsigned int irq);
+void intc_balancing_disable(unsigned int irq);
+void intc_set_dist_handle(unsigned int irq, struct intc_desc *desc,
+ struct intc_desc_int *d, intc_enum id);
+#else
+void intc_balancing_enable(unsigned int irq) { }
+void intc_balancing_disable(unsigned int irq) { }
+void intc_set_dist_handle(unsigned int irq, struct intc_desc *desc,
+ struct intc_desc_int *d, intc_enum id) { }
+#endif
+
+/* chip.c */
+extern struct irq_chip intc_irq_chip;
+void _intc_enable(unsigned int irq, unsigned long handle);
+
+/* core.c */
+extern struct list_head intc_list;
+extern raw_spinlock_t intc_big_lock;
+extern unsigned int nr_intc_controllers;
+extern struct sysdev_class intc_sysdev_class;
+
+unsigned int intc_get_dfl_prio_level(void);
+unsigned int intc_get_prio_level(unsigned int irq);
+void intc_set_prio_level(unsigned int irq, unsigned int level);
+
+/* handle.c */
+unsigned int intc_get_mask_handle(struct intc_desc *desc,
+ struct intc_desc_int *d,
+ intc_enum enum_id, int do_grps);
+unsigned int intc_get_prio_handle(struct intc_desc *desc,
+ struct intc_desc_int *d,
+ intc_enum enum_id, int do_grps);
+unsigned int intc_get_sense_handle(struct intc_desc *desc,
+ struct intc_desc_int *d,
+ intc_enum enum_id);
+void intc_set_ack_handle(unsigned int irq, struct intc_desc *desc,
+ struct intc_desc_int *d, intc_enum id);
+unsigned long intc_get_ack_handle(unsigned int irq);
+void intc_enable_disable_enum(struct intc_desc *desc, struct intc_desc_int *d,
+ intc_enum enum_id, int enable);
+
+/* virq.c */
+void intc_subgroup_init(struct intc_desc *desc, struct intc_desc_int *d);
+void intc_irq_xlate_set(unsigned int irq, intc_enum id, struct intc_desc_int *d);
+struct intc_map_entry *intc_irq_xlate_get(unsigned int irq);
--- /dev/null
+/*
+ * Support for hardware-assisted userspace interrupt masking.
+ *
+ * Copyright (C) 2010 Paul Mundt
+ *
+ * This file is subject to the terms and conditions of the GNU General Public
+ * License. See the file "COPYING" in the main directory of this archive
+ * for more details.
+ */
+#define pr_fmt(fmt) "intc: " fmt
+
+#include <linux/errno.h>
+#include <linux/sysdev.h>
+#include <linux/init.h>
+#include <linux/io.h>
+#include <asm/sizes.h>
+#include "internals.h"
+
+static void __iomem *uimask;
+
+static ssize_t
+show_intc_userimask(struct sysdev_class *cls,
+ struct sysdev_class_attribute *attr, char *buf)
+{
+ return sprintf(buf, "%d\n", (__raw_readl(uimask) >> 4) & 0xf);
+}
+
+static ssize_t
+store_intc_userimask(struct sysdev_class *cls,
+ struct sysdev_class_attribute *attr,
+ const char *buf, size_t count)
+{
+ unsigned long level;
+
+ level = simple_strtoul(buf, NULL, 10);
+
+ /*
+ * Minimal acceptable IRQ levels are in the 2 - 16 range, but
+ * these are chomped so as to not interfere with normal IRQs.
+ *
+ * Level 1 is a special case on some CPUs in that it's not
+ * directly settable, but given that USERIMASK cuts off below a
+ * certain level, we don't care about this limitation here.
+ * Level 0 on the other hand equates to user masking disabled.
+ *
+ * We use the default priority level as a cut off so that only
+ * special case opt-in IRQs can be mangled.
+ */
+ if (level >= intc_get_dfl_prio_level())
+ return -EINVAL;
+
+ __raw_writel(0xa5 << 24 | level << 4, uimask);
+
+ return count;
+}
+
+static SYSDEV_CLASS_ATTR(userimask, S_IRUSR | S_IWUSR,
+ show_intc_userimask, store_intc_userimask);
+
+
+static int __init userimask_sysdev_init(void)
+{
+ if (unlikely(!uimask))
+ return -ENXIO;
+
+ return sysdev_class_create_file(&intc_sysdev_class, &attr_userimask);
+}
+late_initcall(userimask_sysdev_init);
+
+int register_intc_userimask(unsigned long addr)
+{
+ if (unlikely(uimask))
+ return -EBUSY;
+
+ uimask = ioremap_nocache(addr, SZ_4K);
+ if (unlikely(!uimask))
+ return -ENOMEM;
+
+ pr_info("userimask support registered for levels 0 -> %d\n",
+ intc_get_dfl_prio_level() - 1);
+
+ return 0;
+}
--- /dev/null
+/*
+ * Support for virtual IRQ subgroups debugfs mapping.
+ *
+ * Copyright (C) 2010 Paul Mundt
+ *
+ * Modelled after arch/powerpc/kernel/irq.c.
+ *
+ * This file is subject to the terms and conditions of the GNU General Public
+ * License. See the file "COPYING" in the main directory of this archive
+ * for more details.
+ */
+#include <linux/seq_file.h>
+#include <linux/fs.h>
+#include <linux/init.h>
+#include <linux/irq.h>
+#include <linux/debugfs.h>
+#include "internals.h"
+
+static int intc_irq_xlate_debug(struct seq_file *m, void *priv)
+{
+ int i;
+
+ seq_printf(m, "%-5s %-7s %-15s\n", "irq", "enum", "chip name");
+
+ for (i = 1; i < nr_irqs; i++) {
+ struct intc_map_entry *entry = intc_irq_xlate_get(i);
+ struct intc_desc_int *desc = entry->desc;
+
+ if (!desc)
+ continue;
+
+ seq_printf(m, "%5d ", i);
+ seq_printf(m, "0x%05x ", entry->enum_id);
+ seq_printf(m, "%-15s\n", desc->chip.name);
+ }
+
+ return 0;
+}
+
+static int intc_irq_xlate_open(struct inode *inode, struct file *file)
+{
+ return single_open(file, intc_irq_xlate_debug, inode->i_private);
+}
+
+static const struct file_operations intc_irq_xlate_fops = {
+ .open = intc_irq_xlate_open,
+ .read = seq_read,
+ .llseek = seq_lseek,
+ .release = single_release,
+};
+
+static int __init intc_irq_xlate_init(void)
+{
+ /*
+ * XXX.. use arch_debugfs_dir here when all of the intc users are
+ * converted.
+ */
+ if (debugfs_create_file("intc_irq_xlate", S_IRUGO, NULL, NULL,
+ &intc_irq_xlate_fops) == NULL)
+ return -ENOMEM;
+
+ return 0;
+}
+fs_initcall(intc_irq_xlate_init);
--- /dev/null
+/*
+ * Support for virtual IRQ subgroups.
+ *
+ * Copyright (C) 2010 Paul Mundt
+ *
+ * This file is subject to the terms and conditions of the GNU General Public
+ * License. See the file "COPYING" in the main directory of this archive
+ * for more details.
+ */
+#define pr_fmt(fmt) "intc: " fmt
+
+#include <linux/slab.h>
+#include <linux/irq.h>
+#include <linux/list.h>
+#include <linux/radix-tree.h>
+#include <linux/spinlock.h>
+#include "internals.h"
+
+static struct intc_map_entry intc_irq_xlate[NR_IRQS];
+
+struct intc_virq_list {
+ unsigned int irq;
+ struct intc_virq_list *next;
+};
+
+#define for_each_virq(entry, head) \
+ for (entry = head; entry; entry = entry->next)
+
+/*
+ * Tags for the radix tree
+ */
+#define INTC_TAG_VIRQ_NEEDS_ALLOC 0
+
+void intc_irq_xlate_set(unsigned int irq, intc_enum id, struct intc_desc_int *d)
+{
+ unsigned long flags;
+
+ raw_spin_lock_irqsave(&intc_big_lock, flags);
+ intc_irq_xlate[irq].enum_id = id;
+ intc_irq_xlate[irq].desc = d;
+ raw_spin_unlock_irqrestore(&intc_big_lock, flags);
+}
+
+struct intc_map_entry *intc_irq_xlate_get(unsigned int irq)
+{
+ return intc_irq_xlate + irq;
+}
+
+int intc_irq_lookup(const char *chipname, intc_enum enum_id)
+{
+ struct intc_map_entry *ptr;
+ struct intc_desc_int *d;
+ int irq = -1;
+
+ list_for_each_entry(d, &intc_list, list) {
+ int tagged;
+
+ if (strcmp(d->chip.name, chipname) != 0)
+ continue;
+
+ /*
+ * Catch early lookups for subgroup VIRQs that have not
+ * yet been allocated an IRQ. This already includes a
+ * fast-path out if the tree is untagged, so there is no
+ * need to explicitly test the root tree.
+ */
+ tagged = radix_tree_tag_get(&d->tree, enum_id,
+ INTC_TAG_VIRQ_NEEDS_ALLOC);
+ if (unlikely(tagged))
+ break;
+
+ ptr = radix_tree_lookup(&d->tree, enum_id);
+ if (ptr) {
+ irq = ptr - intc_irq_xlate;
+ break;
+ }
+ }
+
+ return irq;
+}
+EXPORT_SYMBOL_GPL(intc_irq_lookup);
+
+static int add_virq_to_pirq(unsigned int irq, unsigned int virq)
+{
+ struct intc_virq_list **last, *entry;
+ struct irq_desc *desc = irq_to_desc(irq);
+
+ /* scan for duplicates */
+ last = (struct intc_virq_list **)&desc->handler_data;
+ for_each_virq(entry, desc->handler_data) {
+ if (entry->irq == virq)
+ return 0;
+ last = &entry->next;
+ }
+
+ entry = kzalloc(sizeof(struct intc_virq_list), GFP_ATOMIC);
+ if (!entry) {
+ pr_err("can't allocate VIRQ mapping for %d\n", virq);
+ return -ENOMEM;
+ }
+
+ entry->irq = virq;
+
+ *last = entry;
+
+ return 0;
+}
+
+static void intc_virq_handler(unsigned int irq, struct irq_desc *desc)
+{
+ struct intc_virq_list *entry, *vlist = get_irq_data(irq);
+ struct intc_desc_int *d = get_intc_desc(irq);
+
+ desc->chip->mask_ack(irq);
+
+ for_each_virq(entry, vlist) {
+ unsigned long addr, handle;
+
+ handle = (unsigned long)get_irq_data(entry->irq);
+ addr = INTC_REG(d, _INTC_ADDR_E(handle), 0);
+
+ if (intc_reg_fns[_INTC_FN(handle)](addr, handle, 0))
+ generic_handle_irq(entry->irq);
+ }
+
+ desc->chip->unmask(irq);
+}
+
+static unsigned long __init intc_subgroup_data(struct intc_subgroup *subgroup,
+ struct intc_desc_int *d,
+ unsigned int index)
+{
+ unsigned int fn = REG_FN_TEST_BASE + (subgroup->reg_width >> 3) - 1;
+
+ return _INTC_MK(fn, MODE_ENABLE_REG, intc_get_reg(d, subgroup->reg),
+ 0, 1, (subgroup->reg_width - 1) - index);
+}
+
+static void __init intc_subgroup_init_one(struct intc_desc *desc,
+ struct intc_desc_int *d,
+ struct intc_subgroup *subgroup)
+{
+ struct intc_map_entry *mapped;
+ unsigned int pirq;
+ unsigned long flags;
+ int i;
+
+ mapped = radix_tree_lookup(&d->tree, subgroup->parent_id);
+ if (!mapped) {
+ WARN_ON(1);
+ return;
+ }
+
+ pirq = mapped - intc_irq_xlate;
+
+ raw_spin_lock_irqsave(&d->lock, flags);
+
+ for (i = 0; i < ARRAY_SIZE(subgroup->enum_ids); i++) {
+ struct intc_subgroup_entry *entry;
+ int err;
+
+ if (!subgroup->enum_ids[i])
+ continue;
+
+ entry = kmalloc(sizeof(*entry), GFP_NOWAIT);
+ if (!entry)
+ break;
+
+ entry->pirq = pirq;
+ entry->enum_id = subgroup->enum_ids[i];
+ entry->handle = intc_subgroup_data(subgroup, d, i);
+
+ err = radix_tree_insert(&d->tree, entry->enum_id, entry);
+ if (unlikely(err < 0))
+ break;
+
+ radix_tree_tag_set(&d->tree, entry->enum_id,
+ INTC_TAG_VIRQ_NEEDS_ALLOC);
+ }
+
+ raw_spin_unlock_irqrestore(&d->lock, flags);
+}
+
+void __init intc_subgroup_init(struct intc_desc *desc, struct intc_desc_int *d)
+{
+ int i;
+
+ if (!desc->hw.subgroups)
+ return;
+
+ for (i = 0; i < desc->hw.nr_subgroups; i++)
+ intc_subgroup_init_one(desc, d, desc->hw.subgroups + i);
+}
+
+static void __init intc_subgroup_map(struct intc_desc_int *d)
+{
+ struct intc_subgroup_entry *entries[32];
+ unsigned long flags;
+ unsigned int nr_found;
+ int i;
+
+ raw_spin_lock_irqsave(&d->lock, flags);
+
+restart:
+ nr_found = radix_tree_gang_lookup_tag_slot(&d->tree,
+ (void ***)entries, 0, ARRAY_SIZE(entries),
+ INTC_TAG_VIRQ_NEEDS_ALLOC);
+
+ for (i = 0; i < nr_found; i++) {
+ struct intc_subgroup_entry *entry;
+ int irq;
+
+ entry = radix_tree_deref_slot((void **)entries[i]);
+ if (unlikely(!entry))
+ continue;
+ if (unlikely(entry == RADIX_TREE_RETRY))
+ goto restart;
+
+ irq = create_irq();
+ if (unlikely(irq < 0)) {
+ pr_err("no more free IRQs, bailing..\n");
+ break;
+ }
+
+ pr_info("Setting up a chained VIRQ from %d -> %d\n",
+ irq, entry->pirq);
+
+ intc_irq_xlate_set(irq, entry->enum_id, d);
+
+ set_irq_chip_and_handler_name(irq, get_irq_chip(entry->pirq),
+ handle_simple_irq, "virq");
+ set_irq_chip_data(irq, get_irq_chip_data(entry->pirq));
+
+ set_irq_data(irq, (void *)entry->handle);
+
+ set_irq_chained_handler(entry->pirq, intc_virq_handler);
+ add_virq_to_pirq(entry->pirq, irq);
+
+ radix_tree_tag_clear(&d->tree, entry->enum_id,
+ INTC_TAG_VIRQ_NEEDS_ALLOC);
+ radix_tree_replace_slot((void **)entries[i],
+ &intc_irq_xlate[irq]);
+ }
+
+ raw_spin_unlock_irqrestore(&d->lock, flags);
+}
+
+void __init intc_finalize(void)
+{
+ struct intc_desc_int *d;
+
+ list_for_each_entry(d, &intc_list, list)
+ if (radix_tree_tagged(&d->tree, INTC_TAG_VIRQ_NEEDS_ALLOC))
+ intc_subgroup_map(d);
+}
prio_regs, sense_regs, ack_regs), \
}
-int __init register_intc_controller(struct intc_desc *desc);
+int register_intc_controller(struct intc_desc *desc);
void reserve_intc_vectors(struct intc_vect *vectors, unsigned int nr_vecs);
int intc_set_priority(unsigned int irq, unsigned int prio);
int intc_irq_lookup(const char *chipname, intc_enum enum_id);
git://bbs.cooldavid.org / net-next-2.6.git / commitdiff