forked from mirrors/linux
a8ac296114
IRQ0 is no longer returned by platform_get_irq() and its ilk -- they now
return -EINVAL instead. However, the kernel code supporting SH3/4-based
SoCs still maps the IRQ #s starting at 0 -- modify that code to start the
IRQ #s from 16 instead.
The patch should mostly affect the AP-SH4A-3A/AP-SH4AD-0A boards as they
indeed are using IRQ0 for the SMSC911x compatible Ethernet chip.
Fixes: ce753ad154 ("platform: finally disallow IRQ0 in platform_get_irq() and its ilk")
Signed-off-by: Sergey Shtylyov <s.shtylyov@omp.ru>
Reviewed-by: Geert Uytterhoeven <geert+renesas@glider.be>
Tested-by: Geert Uytterhoeven <geert+renesas@glider.be>
Reviewed-by: John Paul Adrian Glaubitz <glaubitz@physik.fu-berlin.de>
Tested-by: John Paul Adrian Glaubitz <glaubitz@physik.fu-berlin.de>
Link: https://lore.kernel.org/r/71105dbf-cdb0-72e1-f9eb-eeda8e321696@omp.ru
Signed-off-by: John Paul Adrian Glaubitz <glaubitz@physik.fu-berlin.de>
153 lines
3.6 KiB
C
153 lines
3.6 KiB
C
/* SPDX-License-Identifier: GPL-2.0 */
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#ifndef __SH_INTC_H
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#define __SH_INTC_H
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#include <linux/ioport.h>
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#ifdef CONFIG_SUPERH
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#define INTC_NR_IRQS 512
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#else
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#define INTC_NR_IRQS 1024
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#endif
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/*
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* Convert back and forth between INTEVT and IRQ values.
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*/
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#ifdef CONFIG_CPU_HAS_INTEVT /* Avoid IRQ0 (invalid for platform devices) */
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#define evt2irq(evt) ((evt) >> 5)
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#define irq2evt(irq) ((irq) << 5)
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#else
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#define evt2irq(evt) (evt)
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#define irq2evt(irq) (irq)
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#endif
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typedef unsigned char intc_enum;
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struct intc_vect {
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intc_enum enum_id;
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unsigned short vect;
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};
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#define INTC_VECT(enum_id, vect) { enum_id, vect }
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#define INTC_IRQ(enum_id, irq) INTC_VECT(enum_id, irq2evt(irq))
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struct intc_group {
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intc_enum enum_id;
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intc_enum enum_ids[32];
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};
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#define INTC_GROUP(enum_id, ids...) { enum_id, { ids } }
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struct intc_subgroup {
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unsigned long reg, reg_width;
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intc_enum parent_id;
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intc_enum enum_ids[32];
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};
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struct intc_mask_reg {
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unsigned long set_reg, clr_reg, reg_width;
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intc_enum enum_ids[32];
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#ifdef CONFIG_INTC_BALANCING
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unsigned long dist_reg;
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#endif
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#ifdef CONFIG_SMP
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unsigned long smp;
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#endif
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};
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struct intc_prio_reg {
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unsigned long set_reg, clr_reg, reg_width, field_width;
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intc_enum enum_ids[16];
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#ifdef CONFIG_SMP
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unsigned long smp;
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#endif
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};
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struct intc_sense_reg {
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unsigned long reg, reg_width, field_width;
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intc_enum enum_ids[16];
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};
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#ifdef CONFIG_INTC_BALANCING
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#define INTC_SMP_BALANCING(reg) .dist_reg = (reg)
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#else
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#define INTC_SMP_BALANCING(reg)
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#endif
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#ifdef CONFIG_SMP
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#define INTC_SMP(stride, nr) .smp = (stride) | ((nr) << 8)
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#else
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#define INTC_SMP(stride, nr)
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#endif
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struct intc_hw_desc {
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struct intc_vect *vectors;
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unsigned int nr_vectors;
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struct intc_group *groups;
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unsigned int nr_groups;
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struct intc_mask_reg *mask_regs;
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unsigned int nr_mask_regs;
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struct intc_prio_reg *prio_regs;
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unsigned int nr_prio_regs;
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struct intc_sense_reg *sense_regs;
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unsigned int nr_sense_regs;
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struct intc_mask_reg *ack_regs;
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unsigned int nr_ack_regs;
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struct intc_subgroup *subgroups;
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unsigned int nr_subgroups;
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};
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#define _INTC_SIZEOF_OR_ZERO(a) (_Generic(a, \
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typeof(NULL): 0, \
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default: sizeof(a)))
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#define _INTC_ARRAY(a) a, _INTC_SIZEOF_OR_ZERO(a)/sizeof(*a)
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#define INTC_HW_DESC(vectors, groups, mask_regs, \
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prio_regs, sense_regs, ack_regs) \
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{ \
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_INTC_ARRAY(vectors), _INTC_ARRAY(groups), \
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_INTC_ARRAY(mask_regs), _INTC_ARRAY(prio_regs), \
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_INTC_ARRAY(sense_regs), _INTC_ARRAY(ack_regs), \
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}
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struct intc_desc {
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char *name;
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struct resource *resource;
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unsigned int num_resources;
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intc_enum force_enable;
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intc_enum force_disable;
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bool skip_syscore_suspend;
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struct intc_hw_desc hw;
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};
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#define DECLARE_INTC_DESC(symbol, chipname, vectors, groups, \
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mask_regs, prio_regs, sense_regs) \
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struct intc_desc symbol __initdata = { \
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.name = chipname, \
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.hw = INTC_HW_DESC(vectors, groups, mask_regs, \
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prio_regs, sense_regs, NULL), \
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}
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#define DECLARE_INTC_DESC_ACK(symbol, chipname, vectors, groups, \
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mask_regs, prio_regs, sense_regs, ack_regs) \
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struct intc_desc symbol __initdata = { \
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.name = chipname, \
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.hw = INTC_HW_DESC(vectors, groups, mask_regs, \
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prio_regs, sense_regs, ack_regs), \
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}
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int register_intc_controller(struct intc_desc *desc);
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int intc_set_priority(unsigned int irq, unsigned int prio);
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int intc_irq_lookup(const char *chipname, intc_enum enum_id);
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void intc_finalize(void);
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#ifdef CONFIG_INTC_USERIMASK
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int register_intc_userimask(unsigned long addr);
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#else
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static inline int register_intc_userimask(unsigned long addr)
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{
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return 0;
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}
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#endif
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#endif /* __SH_INTC_H */
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