1// SPDX-License-Identifier: GPL-2.0-or-later
2/*
3 * arch/xtensa/platforms/xt2000/setup.c
4 *
5 * Platform specific functions for the XT2000 board.
6 *
7 * Authors:	Chris Zankel <chris@zankel.net>
8 *		Joe Taylor <joe@tensilica.com>
9 *
10 * Copyright 2001 - 2004 Tensilica Inc.
11 */
12#include <linux/stddef.h>
13#include <linux/kernel.h>
14#include <linux/init.h>
15#include <linux/errno.h>
16#include <linux/reboot.h>
17#include <linux/kdev_t.h>
18#include <linux/types.h>
19#include <linux/major.h>
20#include <linux/console.h>
21#include <linux/delay.h>
22#include <linux/stringify.h>
23#include <linux/platform_device.h>
24#include <linux/serial.h>
25#include <linux/serial_8250.h>
26
27#include <asm/processor.h>
28#include <asm/platform.h>
29#include <asm/bootparam.h>
30#include <platform/hardware.h>
31#include <platform/serial.h>
32
33/* Assumes s points to an 8-chr string.  No checking for NULL. */
34
35static void led_print (int f, char *s)
36{
37	unsigned long* led_addr = (unsigned long*) (XT2000_LED_ADDR + 0xE0) + f;
38	int i;
39	for (i = f; i < 8; i++)
40		if ((*led_addr++ = *s++) == 0)
41		    break;
42}
43
44void platform_halt(void)
45{
46	led_print (0, "  HALT  ");
47	local_irq_disable();
48	while (1);
49}
50
51void platform_power_off(void)
52{
53	led_print (0, "POWEROFF");
54	local_irq_disable();
55	while (1);
56}
57
58void platform_restart(void)
59{
60	/* Flush and reset the mmu, simulate a processor reset, and
61	 * jump to the reset vector. */
62	cpu_reset();
63	/* control never gets here */
64}
65
66void __init platform_setup(char** cmdline)
67{
68	led_print (0, "LINUX   ");
69}
70
71/* early initialization */
72
73void __init platform_init(bp_tag_t *first)
74{
75}
76
77/* Heartbeat. Let the LED blink. */
78
79void platform_heartbeat(void)
80{
81	static int i=0, t = 0;
82
83	if (--t < 0)
84	{
85		t = 59;
86		led_print(7, i ? ".": " ");
87		i ^= 1;
88	}
89}
90
91//#define RS_TABLE_SIZE 2
92
93#define _SERIAL_PORT(_base,_irq)					\
94{									\
95	.mapbase	= (_base),					\
96	.membase	= (void*)(_base),				\
97	.irq		= (_irq),					\
98	.uartclk	= DUART16552_XTAL_FREQ,				\
99	.iotype		= UPIO_MEM,					\
100	.flags		= UPF_BOOT_AUTOCONF,				\
101	.regshift	= 2,						\
102}
103
104static struct plat_serial8250_port xt2000_serial_data[] = {
105#if XCHAL_HAVE_BE
106	_SERIAL_PORT(DUART16552_1_ADDR + 3, DUART16552_1_INTNUM),
107	_SERIAL_PORT(DUART16552_2_ADDR + 3, DUART16552_2_INTNUM),
108#else
109	_SERIAL_PORT(DUART16552_1_ADDR, DUART16552_1_INTNUM),
110	_SERIAL_PORT(DUART16552_2_ADDR, DUART16552_2_INTNUM),
111#endif
112	{ }
113};
114
115static struct platform_device xt2000_serial8250_device = {
116	.name		= "serial8250",
117	.id		= PLAT8250_DEV_PLATFORM,
118	.dev		= {
119	    .platform_data = xt2000_serial_data,
120	},
121};
122
123static struct resource xt2000_sonic_res[] = {
124	{
125		.start = SONIC83934_ADDR,
126		.end   = SONIC83934_ADDR + 0xff,
127		.flags = IORESOURCE_MEM,
128	},
129	{
130		.start = SONIC83934_INTNUM,
131		.end = SONIC83934_INTNUM,
132		.flags = IORESOURCE_IRQ,
133	},
134};
135
136static struct platform_device xt2000_sonic_device = {
137	.name		= "xtsonic",
138	.num_resources	= ARRAY_SIZE(xt2000_sonic_res),
139	.resource		= xt2000_sonic_res,
140};
141
142static int __init xt2000_setup_devinit(void)
143{
144	platform_device_register(&xt2000_serial8250_device);
145	platform_device_register(&xt2000_sonic_device);
146
147	return 0;
148}
149
150device_initcall(xt2000_setup_devinit);
151