1 // SPDX-License-Identifier: GPL-2.0 2 /* 3 * Shared SH3 Setup code 4 * 5 * Copyright (C) 2008 Magnus Damm 6 */ 7 8 #include <linux/init.h> 9 #include <linux/irq.h> 10 #include <linux/io.h> 11 12 /* All SH3 devices are equipped with IRQ0->5 (except sh7708) */ 13 14 enum { 15 UNUSED = 0, 16 17 /* interrupt sources */ 18 IRQ0, IRQ1, IRQ2, IRQ3, IRQ4, IRQ5, 19 }; 20 21 static struct intc_vect vectors_irq0123[] __initdata = { 22 INTC_VECT(IRQ0, 0x600), INTC_VECT(IRQ1, 0x620), 23 INTC_VECT(IRQ2, 0x640), INTC_VECT(IRQ3, 0x660), 24 }; 25 26 static struct intc_vect vectors_irq45[] __initdata = { 27 INTC_VECT(IRQ4, 0x680), INTC_VECT(IRQ5, 0x6a0), 28 }; 29 30 static struct intc_prio_reg prio_registers[] __initdata = { 31 { 0xa4000016, 0, 16, 4, /* IPRC */ { IRQ3, IRQ2, IRQ1, IRQ0 } }, 32 { 0xa4000018, 0, 16, 4, /* IPRD */ { 0, 0, IRQ5, IRQ4 } }, 33 }; 34 35 static struct intc_mask_reg ack_registers[] __initdata = { 36 { 0xa4000004, 0, 8, /* IRR0 */ 37 { 0, 0, IRQ5, IRQ4, IRQ3, IRQ2, IRQ1, IRQ0 } }, 38 }; 39 40 static struct intc_sense_reg sense_registers[] __initdata = { 41 { 0xa4000010, 16, 2, { 0, 0, IRQ5, IRQ4, IRQ3, IRQ2, IRQ1, IRQ0 } }, 42 }; 43 44 static DECLARE_INTC_DESC_ACK(intc_desc_irq0123, "sh3-irq0123", 45 vectors_irq0123, NULL, NULL, 46 prio_registers, sense_registers, ack_registers); 47 48 static DECLARE_INTC_DESC_ACK(intc_desc_irq45, "sh3-irq45", 49 vectors_irq45, NULL, NULL, 50 prio_registers, sense_registers, ack_registers); 51 52 #define INTC_ICR1 0xa4000010UL 53 #define INTC_ICR1_IRQLVL (1<<14) 54 55 void __init plat_irq_setup_pins(int mode) 56 { 57 if (mode == IRQ_MODE_IRQ) { 58 __raw_writew(__raw_readw(INTC_ICR1) & ~INTC_ICR1_IRQLVL, INTC_ICR1); 59 register_intc_controller(&intc_desc_irq0123); 60 return; 61 } 62 BUG(); 63 } 64 65 void __init plat_irq_setup_sh3(void) 66 { 67 register_intc_controller(&intc_desc_irq45); 68 } 69