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
plat_irq_setup_pins(int mode)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
plat_irq_setup_sh3(void)66 void __init plat_irq_setup_sh3(void)
67 {
68 register_intc_controller(&intc_desc_irq45);
69 }
70