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
36 static 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
45 static 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
53 static 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
63 static struct notifier_block xt2000_restart_block = {
64 .notifier_call = xt2000_restart,
65 };
66
67 void __init platform_setup(char** cmdline)
68 {
69 led_print (0, "LINUX ");
70 }
71
72 /* Heartbeat. Let the LED blink. */
73
74 static void xt2000_heartbeat(struct timer_list *unused);
75
76 static DEFINE_TIMER(heartbeat_timer, xt2000_heartbeat);
77
78 static 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
100 static 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
111 static 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
119 static 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
132 static struct platform_device xt2000_sonic_device = {
133 .name = "xtsonic",
134 .num_resources = ARRAY_SIZE(xt2000_sonic_res),
135 .resource = xt2000_sonic_res,
136 };
137
138 static 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
150 device_initcall(xt2000_setup_devinit);
151
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