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 #include <asm/platform_early.h> 12 13 /* All SH3 devices are equipped with IRQ0->5 (except sh7708) */ 14 15 enum { 16 UNUSED = 0, 17 18 /* interrupt sources */ 19 IRQ0, IRQ1, IRQ2, IRQ3, IRQ4, IRQ5, 20 }; 21 22 static struct intc_vect vectors_irq0123[] __initdata = { 23 INTC_VECT(IRQ0, 0x600), INTC_VECT(IRQ1, 0x620), 24 INTC_VECT(IRQ2, 0x640), INTC_VECT(IRQ3, 0x660), 25 }; 26 27 static struct intc_vect vectors_irq45[] __initdata = { 28 INTC_VECT(IRQ4, 0x680), INTC_VECT(IRQ5, 0x6a0), 29 }; 30 31 static struct intc_prio_reg prio_registers[] __initdata = { 32 { 0xa4000016, 0, 16, 4, /* IPRC */ { IRQ3, IRQ2, IRQ1, IRQ0 } }, 33 { 0xa4000018, 0, 16, 4, /* IPRD */ { 0, 0, IRQ5, IRQ4 } }, 34 }; 35 36 static struct intc_mask_reg ack_registers[] __initdata = { 37 { 0xa4000004, 0, 8, /* IRR0 */ 38 { 0, 0, IRQ5, IRQ4, IRQ3, IRQ2, IRQ1, IRQ0 } }, 39 }; 40 41 static struct intc_sense_reg sense_registers[] __initdata = { 42 { 0xa4000010, 16, 2, { 0, 0, IRQ5, IRQ4, IRQ3, IRQ2, IRQ1, IRQ0 } }, 43 }; 44 45 static DECLARE_INTC_DESC_ACK(intc_desc_irq0123, "sh3-irq0123", 46 vectors_irq0123, NULL, NULL, 47 prio_registers, sense_registers, ack_registers); 48 49 static DECLARE_INTC_DESC_ACK(intc_desc_irq45, "sh3-irq45", 50 vectors_irq45, NULL, NULL, 51 prio_registers, sense_registers, ack_registers); 52 53 #define INTC_ICR1 0xa4000010UL 54 #define INTC_ICR1_IRQLVL (1<<14) 55 56 void __init plat_irq_setup_pins(int mode) 57 { 58 if (mode == IRQ_MODE_IRQ) { 59 __raw_writew(__raw_readw(INTC_ICR1) & ~INTC_ICR1_IRQLVL, INTC_ICR1); 60 register_intc_controller(&intc_desc_irq0123); 61 return; 62 } 63 BUG(); 64 } 65 66 void __init plat_irq_setup_sh3(void) 67 { 68 register_intc_controller(&intc_desc_irq45); 69 } 70