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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 <[email protected]>
8 * Joe Taylor <[email protected]>
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 sys_off_data *unused)
54{
55 /* Flush and reset the mmu, simulate a processor reset, and
56 * jump to the reset vector. */
57 cpu_reset();
58
59 return NOTIFY_DONE;
60}
61
62void __init platform_setup(char** cmdline)
63{
64 led_print (0, "LINUX ");
65}
66
67/* Heartbeat. Let the LED blink. */
68
69static void xt2000_heartbeat(struct timer_list *unused);
70
71static DEFINE_TIMER(heartbeat_timer, xt2000_heartbeat);
72
73static void xt2000_heartbeat(struct timer_list *unused)
74{
75 static int i;
76
77 led_print(7, i ? "." : " ");
78 i ^= 1;
79 mod_timer(&heartbeat_timer, jiffies + HZ / 2);
80}
81
82//#define RS_TABLE_SIZE 2
83
84#define _SERIAL_PORT(_base,_irq) \
85{ \
86 .mapbase = (_base), \
87 .membase = (void*)(_base), \
88 .irq = (_irq), \
89 .uartclk = DUART16552_XTAL_FREQ, \
90 .iotype = UPIO_MEM, \
91 .flags = UPF_BOOT_AUTOCONF, \
92 .regshift = 2, \
93}
94
95static struct plat_serial8250_port xt2000_serial_data[] = {
96#if XCHAL_HAVE_BE
97 _SERIAL_PORT(DUART16552_1_ADDR + 3, DUART16552_1_INTNUM),
98 _SERIAL_PORT(DUART16552_2_ADDR + 3, DUART16552_2_INTNUM),
99#else
100 _SERIAL_PORT(DUART16552_1_ADDR, DUART16552_1_INTNUM),
101 _SERIAL_PORT(DUART16552_2_ADDR, DUART16552_2_INTNUM),
102#endif
103 { }
104};
105
106static struct platform_device xt2000_serial8250_device = {
107 .name = "serial8250",
108 .id = PLAT8250_DEV_PLATFORM,
109 .dev = {
110 .platform_data = xt2000_serial_data,
111 },
112};
113
114static struct resource xt2000_sonic_res[] = {
115 {
116 .start = SONIC83934_ADDR,
117 .end = SONIC83934_ADDR + 0xff,
118 .flags = IORESOURCE_MEM,
119 },
120 {
121 .start = SONIC83934_INTNUM,
122 .end = SONIC83934_INTNUM,
123 .flags = IORESOURCE_IRQ,
124 },
125};
126
127static struct platform_device xt2000_sonic_device = {
128 .name = "xtsonic",
129 .num_resources = ARRAY_SIZE(xt2000_sonic_res),
130 .resource = xt2000_sonic_res,
131};
132
133static int __init xt2000_setup_devinit(void)
134{
135 platform_device_register(&xt2000_serial8250_device);
136 platform_device_register(&xt2000_sonic_device);
137 mod_timer(&heartbeat_timer, jiffies + HZ / 2);
138 register_sys_off_handler(SYS_OFF_MODE_RESTART,
139 SYS_OFF_PRIO_PLATFORM,
140 xt2000_restart, NULL);
141 register_sys_off_handler(SYS_OFF_MODE_POWER_OFF,
142 SYS_OFF_PRIO_DEFAULT,
143 xt2000_power_off, NULL);
144 return 0;
145}
146
147device_initcall(xt2000_setup_devinit);