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 
35 static 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 
44 void platform_halt(void)
45 {
46 	led_print (0, "  HALT  ");
47 	local_irq_disable();
48 	while (1);
49 }
50 
51 void platform_power_off(void)
52 {
53 	led_print (0, "POWEROFF");
54 	local_irq_disable();
55 	while (1);
56 }
57 
58 void 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 
66 void __init platform_setup(char** cmdline)
67 {
68 	led_print (0, "LINUX   ");
69 }
70 
71 /* early initialization */
72 
73 void __init platform_init(bp_tag_t *first)
74 {
75 }
76 
77 /* Heartbeat. Let the LED blink. */
78 
79 void 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 
104 static 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 
115 static 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 
123 static 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 
136 static struct platform_device xt2000_sonic_device = {
137 	.name		= "xtsonic",
138 	.num_resources	= ARRAY_SIZE(xt2000_sonic_res),
139 	.resource		= xt2000_sonic_res,
140 };
141 
142 static 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 
150 device_initcall(xt2000_setup_devinit);
151