1 /* SPDX-License-Identifier: GPL-2.0-only */
2 /*
3  * drivers/parisc/gsc.h
4  * Declarations for functions in gsc.c
5  * Copyright (c) 2000-2002 Helge Deller, Matthew Wilcox
6  */
7 
8 #include <linux/interrupt.h>
9 #include <asm/hardware.h>
10 #include <asm/parisc-device.h>
11 
12 #define OFFSET_IRR 0x0000   /* Interrupt request register */
13 #define OFFSET_IMR 0x0004   /* Interrupt mask register */
14 #define OFFSET_IPR 0x0008   /* Interrupt pending register */
15 #define OFFSET_ICR 0x000C   /* Interrupt control register */
16 #define OFFSET_IAR 0x0010   /* Interrupt address register */
17 
18 /* PA I/O Architected devices support at least 5 bits in the EIM register. */
19 #define GSC_EIM_WIDTH 5
20 
21 struct gsc_irq {
22 	unsigned long txn_addr;	/* IRQ "target" */
23 	int txn_data;		/* HW "IRQ" */
24 	int irq;		/* virtual IRQ */
25 };
26 
27 struct gsc_asic {
28 	struct parisc_device *gsc;
29 	unsigned long hpa;
30 	char *name;
31 	int version;
32 	int type;
33 	int eim;
34 	struct gsc_irq gsc_irq;
35 	int global_irq[32];
36 };
37 
38 int gsc_common_setup(struct parisc_device *parent, struct gsc_asic *gsc_asic);
39 int gsc_alloc_irq(struct gsc_irq *dev);			/* dev needs an irq */
40 int gsc_claim_irq(struct gsc_irq *dev, int irq);	/* dev needs this irq */
41 int gsc_assign_irq(struct irq_chip *type, void *data);
42 int gsc_find_local_irq(unsigned int irq, int *global_irq, int limit);
43 void gsc_fixup_irqs(struct parisc_device *parent, void *ctrl,
44 		void (*choose)(struct parisc_device *child, void *ctrl));
45 void gsc_asic_assign_irq(struct gsc_asic *asic, int local_irq, int *irqp);
46 
47 irqreturn_t gsc_asic_intr(int irq, void *dev);
48