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#include <linux/timer.h>
27
28#include <asm/processor.h>
29#include <asm/platform.h>
30#include <asm/bootparam.h>
31#include <platform/hardware.h>
32#include <platform/serial.h>
33
34/* Assumes s points to an 8-chr string.  No checking for NULL. */
35
36static void led_print (int f, char *s)
37{
38	unsigned long* led_addr = (unsigned long*) (XT2000_LED_ADDR + 0xE0) + f;
39	int i;
40	for (i = f; i < 8; i++)
41		if ((*led_addr++ = *s++) == 0)
42		    break;
43}
44
45static int xt2000_power_off(struct sys_off_data *unused)
46{
47	led_print (0, "POWEROFF");
48	local_irq_disable();
49	while (1);
50	return NOTIFY_DONE;
51}
52
53static int xt2000_restart(struct notifier_block *this,
54			  unsigned long event, void *ptr)
55{
56	/* Flush and reset the mmu, simulate a processor reset, and
57	 * jump to the reset vector. */
58	cpu_reset();
59
60	return NOTIFY_DONE;
61}
62
63static struct notifier_block xt2000_restart_block = {
64	.notifier_call = xt2000_restart,
65};
66
67void __init platform_setup(char** cmdline)
68{
69	led_print (0, "LINUX   ");
70}
71
72/* Heartbeat. Let the LED blink. */
73
74static void xt2000_heartbeat(struct timer_list *unused);
75
76static DEFINE_TIMER(heartbeat_timer, xt2000_heartbeat);
77
78static void xt2000_heartbeat(struct timer_list *unused)
79{
80	static int i;
81
82	led_print(7, i ? "." : " ");
83	i ^= 1;
84	mod_timer(&heartbeat_timer, jiffies + HZ / 2);
85}
86
87//#define RS_TABLE_SIZE 2
88
89#define _SERIAL_PORT(_base,_irq)					\
90{									\
91	.mapbase	= (_base),					\
92	.membase	= (void*)(_base),				\
93	.irq		= (_irq),					\
94	.uartclk	= DUART16552_XTAL_FREQ,				\
95	.iotype		= UPIO_MEM,					\
96	.flags		= UPF_BOOT_AUTOCONF,				\
97	.regshift	= 2,						\
98}
99
100static struct plat_serial8250_port xt2000_serial_data[] = {
101#if XCHAL_HAVE_BE
102	_SERIAL_PORT(DUART16552_1_ADDR + 3, DUART16552_1_INTNUM),
103	_SERIAL_PORT(DUART16552_2_ADDR + 3, DUART16552_2_INTNUM),
104#else
105	_SERIAL_PORT(DUART16552_1_ADDR, DUART16552_1_INTNUM),
106	_SERIAL_PORT(DUART16552_2_ADDR, DUART16552_2_INTNUM),
107#endif
108	{ }
109};
110
111static struct platform_device xt2000_serial8250_device = {
112	.name		= "serial8250",
113	.id		= PLAT8250_DEV_PLATFORM,
114	.dev		= {
115	    .platform_data = xt2000_serial_data,
116	},
117};
118
119static struct resource xt2000_sonic_res[] = {
120	{
121		.start = SONIC83934_ADDR,
122		.end   = SONIC83934_ADDR + 0xff,
123		.flags = IORESOURCE_MEM,
124	},
125	{
126		.start = SONIC83934_INTNUM,
127		.end = SONIC83934_INTNUM,
128		.flags = IORESOURCE_IRQ,
129	},
130};
131
132static struct platform_device xt2000_sonic_device = {
133	.name		= "xtsonic",
134	.num_resources	= ARRAY_SIZE(xt2000_sonic_res),
135	.resource		= xt2000_sonic_res,
136};
137
138static int __init xt2000_setup_devinit(void)
139{
140	platform_device_register(&xt2000_serial8250_device);
141	platform_device_register(&xt2000_sonic_device);
142	mod_timer(&heartbeat_timer, jiffies + HZ / 2);
143	register_restart_handler(&xt2000_restart_block);
144	register_sys_off_handler(SYS_OFF_MODE_POWER_OFF,
145				 SYS_OFF_PRIO_DEFAULT,
146				 xt2000_power_off, NULL);
147	return 0;
148}
149
150device_initcall(xt2000_setup_devinit);
151