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
plat_irq_setup_pins(int mode)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
plat_irq_setup_sh3(void)65 void __init plat_irq_setup_sh3(void)
66 {
67 register_intc_controller(&intc_desc_irq45);
68 }
69