1*4882a593Smuzhiyun // SPDX-License-Identifier: GPL-2.0 2*4882a593Smuzhiyun #include <linux/interrupt.h> 3*4882a593Smuzhiyun #include <linux/irq.h> 4*4882a593Smuzhiyun 5*4882a593Smuzhiyun #include <asm/traps.h> 6*4882a593Smuzhiyun #include <asm/apollohw.h> 7*4882a593Smuzhiyun apollo_irq_startup(struct irq_data * data)8*4882a593Smuzhiyununsigned int apollo_irq_startup(struct irq_data *data) 9*4882a593Smuzhiyun { 10*4882a593Smuzhiyun unsigned int irq = data->irq; 11*4882a593Smuzhiyun 12*4882a593Smuzhiyun if (irq < 8) 13*4882a593Smuzhiyun *(volatile unsigned char *)(pica+1) &= ~(1 << irq); 14*4882a593Smuzhiyun else 15*4882a593Smuzhiyun *(volatile unsigned char *)(picb+1) &= ~(1 << (irq - 8)); 16*4882a593Smuzhiyun return 0; 17*4882a593Smuzhiyun } 18*4882a593Smuzhiyun apollo_irq_shutdown(struct irq_data * data)19*4882a593Smuzhiyunvoid apollo_irq_shutdown(struct irq_data *data) 20*4882a593Smuzhiyun { 21*4882a593Smuzhiyun unsigned int irq = data->irq; 22*4882a593Smuzhiyun 23*4882a593Smuzhiyun if (irq < 8) 24*4882a593Smuzhiyun *(volatile unsigned char *)(pica+1) |= (1 << irq); 25*4882a593Smuzhiyun else 26*4882a593Smuzhiyun *(volatile unsigned char *)(picb+1) |= (1 << (irq - 8)); 27*4882a593Smuzhiyun } 28*4882a593Smuzhiyun apollo_irq_eoi(struct irq_data * data)29*4882a593Smuzhiyunvoid apollo_irq_eoi(struct irq_data *data) 30*4882a593Smuzhiyun { 31*4882a593Smuzhiyun *(volatile unsigned char *)(pica) = 0x20; 32*4882a593Smuzhiyun *(volatile unsigned char *)(picb) = 0x20; 33*4882a593Smuzhiyun } 34*4882a593Smuzhiyun 35*4882a593Smuzhiyun static struct irq_chip apollo_irq_chip = { 36*4882a593Smuzhiyun .name = "apollo", 37*4882a593Smuzhiyun .irq_startup = apollo_irq_startup, 38*4882a593Smuzhiyun .irq_shutdown = apollo_irq_shutdown, 39*4882a593Smuzhiyun .irq_eoi = apollo_irq_eoi, 40*4882a593Smuzhiyun }; 41*4882a593Smuzhiyun 42*4882a593Smuzhiyun dn_init_IRQ(void)43*4882a593Smuzhiyunvoid __init dn_init_IRQ(void) 44*4882a593Smuzhiyun { 45*4882a593Smuzhiyun m68k_setup_user_interrupt(VEC_USER + 96, 16); 46*4882a593Smuzhiyun m68k_setup_irq_controller(&apollo_irq_chip, handle_fasteoi_irq, 47*4882a593Smuzhiyun IRQ_APOLLO, 16); 48*4882a593Smuzhiyun } 49