Linux kernel mirror (for testing)
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linux
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
40static 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
49void platform_halt(void)
50{
51 led_print (0, " HALT ");
52 local_irq_disable();
53 while (1);
54}
55
56void platform_power_off(void)
57{
58 led_print (0, "POWEROFF");
59 local_irq_disable();
60 while (1);
61}
62
63void platform_restart(void)
64{
65 /* Flush and reset the mmu, simulate a processor reset, and
66 * jump to the reset vector. */
67
68 __asm__ __volatile__ ("movi a2, 15\n\t"
69 "wsr a2, icountlevel\n\t"
70 "movi a2, 0\n\t"
71 "wsr a2, icount\n\t"
72#if XCHAL_NUM_IBREAK > 0
73 "wsr a2, ibreakenable\n\t"
74#endif
75#if XCHAL_HAVE_LOOPS
76 "wsr a2, lcount\n\t"
77#endif
78 "movi a2, 0x1f\n\t"
79 "wsr a2, ps\n\t"
80 "isync\n\t"
81 "jx %0\n\t"
82 :
83 : "a" (XCHAL_RESET_VECTOR_VADDR)
84 : "a2"
85 );
86
87 /* control never gets here */
88}
89
90void __init platform_setup(char** cmdline)
91{
92 led_print (0, "LINUX ");
93}
94
95/* early initialization */
96
97void __init platform_init(bp_tag_t *first)
98{
99}
100
101/* Heartbeat. Let the LED blink. */
102
103void platform_heartbeat(void)
104{
105 static int i=0, t = 0;
106
107 if (--t < 0)
108 {
109 t = 59;
110 led_print(7, i ? ".": " ");
111 i ^= 1;
112 }
113}
114
115//#define RS_TABLE_SIZE 2
116//#define STD_COM_FLAGS (UPF_BOOT_AUTOCONF|UPF_SKIP_TEST)
117
118#define _SERIAL_PORT(_base,_irq) \
119{ \
120 .mapbase = (_base), \
121 .membase = (void*)(_base), \
122 .irq = (_irq), \
123 .uartclk = DUART16552_XTAL_FREQ, \
124 .iotype = UPIO_MEM, \
125 .flags = UPF_BOOT_AUTOCONF, \
126 .regshift = 2, \
127}
128
129static struct plat_serial8250_port xt2000_serial_data[] = {
130#if XCHAL_HAVE_BE
131 _SERIAL_PORT(DUART16552_1_ADDR + 3, DUART16552_1_INTNUM),
132 _SERIAL_PORT(DUART16552_2_ADDR + 3, DUART16552_2_INTNUM),
133#else
134 _SERIAL_PORT(DUART16552_1_ADDR, DUART16552_1_INTNUM),
135 _SERIAL_PORT(DUART16552_2_ADDR, DUART16552_2_INTNUM),
136#endif
137 { }
138};
139
140static struct platform_device xt2000_serial8250_device = {
141 .name = "serial8250",
142 .id = PLAT8250_DEV_PLATFORM,
143 .dev = {
144 .platform_data = xt2000_serial_data,
145 },
146};
147
148static struct resource xt2000_sonic_res[] = {
149 {
150 .start = SONIC83934_ADDR,
151 .end = SONIC83934_ADDR + 0xff,
152 .flags = IORESOURCE_MEM,
153 },
154 {
155 .start = SONIC83934_INTNUM,
156 .end = SONIC83934_INTNUM,
157 .flags = IORESOURCE_IRQ,
158 },
159};
160
161static struct platform_device xt2000_sonic_device = {
162 .name = "xtsonic",
163 .num_resources = ARRAY_SIZE(xt2000_sonic_res),
164 .resource = xt2000_sonic_res,
165};
166
167static int __init xt2000_setup_devinit(void)
168{
169 platform_device_register(&xt2000_serial8250_device);
170 platform_device_register(&xt2000_sonic_device);
171
172 return 0;
173}
174
175device_initcall(xt2000_setup_devinit);