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