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
led_print(int f,char * s)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
platform_halt(void)44 void platform_halt(void)
45 {
46 led_print (0, " HALT ");
47 local_irq_disable();
48 while (1);
49 }
50
platform_power_off(void)51 void platform_power_off(void)
52 {
53 led_print (0, "POWEROFF");
54 local_irq_disable();
55 while (1);
56 }
57
platform_restart(void)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
platform_setup(char ** cmdline)66 void __init platform_setup(char** cmdline)
67 {
68 led_print (0, "LINUX ");
69 }
70
71 /* early initialization */
72
platform_init(bp_tag_t * first)73 void __init platform_init(bp_tag_t *first)
74 {
75 }
76
77 /* Heartbeat. Let the LED blink. */
78
platform_heartbeat(void)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
xt2000_setup_devinit(void)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