1 /*
2 * arch/xtensa/platforms/xt2000/setup.c
3 *
4 * Platform specific functions for the XT2000 board.
5 *
6 * Authors: Chris Zankel <chris@zankel.net>
7 * Joe Taylor <joe@tensilica.com>
8 *
9 * Copyright 2001 - 2004 Tensilica Inc.
10 *
11 * This program is free software; you can redistribute it and/or modify it
12 * under the terms of the GNU General Public License as published by the
13 * Free Software Foundation; either version 2 of the License, or (at your
14 * option) any later version.
15 *
16 */
17 #include <linux/stddef.h>
18 #include <linux/kernel.h>
19 #include <linux/init.h>
20 #include <linux/errno.h>
21 #include <linux/reboot.h>
22 #include <linux/kdev_t.h>
23 #include <linux/types.h>
24 #include <linux/major.h>
25 #include <linux/console.h>
26 #include <linux/delay.h>
27 #include <linux/stringify.h>
28 #include <linux/platform_device.h>
29 #include <linux/serial.h>
30 #include <linux/serial_8250.h>
31
32 #include <asm/processor.h>
33 #include <asm/platform.h>
34 #include <asm/bootparam.h>
35 #include <platform/hardware.h>
36 #include <platform/serial.h>
37
38 /* Assumes s points to an 8-chr string. No checking for NULL. */
39
led_print(int f,char * s)40 static void led_print (int f, char *s)
41 {
42 unsigned long* led_addr = (unsigned long*) (XT2000_LED_ADDR + 0xE0) + f;
43 int i;
44 for (i = f; i < 8; i++)
45 if ((*led_addr++ = *s++) == 0)
46 break;
47 }
48
platform_halt(void)49 void platform_halt(void)
50 {
51 led_print (0, " HALT ");
52 local_irq_disable();
53 while (1);
54 }
55
platform_power_off(void)56 void platform_power_off(void)
57 {
58 led_print (0, "POWEROFF");
59 local_irq_disable();
60 while (1);
61 }
62
platform_restart(void)63 void platform_restart(void)
64 {
65 /* Flush and reset the mmu, simulate a processor reset, and
66 * jump to the reset vector. */
67 cpu_reset();
68 /* control never gets here */
69 }
70
platform_setup(char ** cmdline)71 void __init platform_setup(char** cmdline)
72 {
73 led_print (0, "LINUX ");
74 }
75
76 /* early initialization */
77
platform_init(bp_tag_t * first)78 void __init platform_init(bp_tag_t *first)
79 {
80 }
81
82 /* Heartbeat. Let the LED blink. */
83
platform_heartbeat(void)84 void platform_heartbeat(void)
85 {
86 static int i=0, t = 0;
87
88 if (--t < 0)
89 {
90 t = 59;
91 led_print(7, i ? ".": " ");
92 i ^= 1;
93 }
94 }
95
96 //#define RS_TABLE_SIZE 2
97
98 #define _SERIAL_PORT(_base,_irq) \
99 { \
100 .mapbase = (_base), \
101 .membase = (void*)(_base), \
102 .irq = (_irq), \
103 .uartclk = DUART16552_XTAL_FREQ, \
104 .iotype = UPIO_MEM, \
105 .flags = UPF_BOOT_AUTOCONF, \
106 .regshift = 2, \
107 }
108
109 static struct plat_serial8250_port xt2000_serial_data[] = {
110 #if XCHAL_HAVE_BE
111 _SERIAL_PORT(DUART16552_1_ADDR + 3, DUART16552_1_INTNUM),
112 _SERIAL_PORT(DUART16552_2_ADDR + 3, DUART16552_2_INTNUM),
113 #else
114 _SERIAL_PORT(DUART16552_1_ADDR, DUART16552_1_INTNUM),
115 _SERIAL_PORT(DUART16552_2_ADDR, DUART16552_2_INTNUM),
116 #endif
117 { }
118 };
119
120 static struct platform_device xt2000_serial8250_device = {
121 .name = "serial8250",
122 .id = PLAT8250_DEV_PLATFORM,
123 .dev = {
124 .platform_data = xt2000_serial_data,
125 },
126 };
127
128 static struct resource xt2000_sonic_res[] = {
129 {
130 .start = SONIC83934_ADDR,
131 .end = SONIC83934_ADDR + 0xff,
132 .flags = IORESOURCE_MEM,
133 },
134 {
135 .start = SONIC83934_INTNUM,
136 .end = SONIC83934_INTNUM,
137 .flags = IORESOURCE_IRQ,
138 },
139 };
140
141 static struct platform_device xt2000_sonic_device = {
142 .name = "xtsonic",
143 .num_resources = ARRAY_SIZE(xt2000_sonic_res),
144 .resource = xt2000_sonic_res,
145 };
146
xt2000_setup_devinit(void)147 static int __init xt2000_setup_devinit(void)
148 {
149 platform_device_register(&xt2000_serial8250_device);
150 platform_device_register(&xt2000_sonic_device);
151
152 return 0;
153 }
154
155 device_initcall(xt2000_setup_devinit);
156
