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			      "wsr	a2, lcount\n\t"
76			      "movi	a2, 0x1f\n\t"
77			      "wsr	a2, ps\n\t"
78			      "isync\n\t"
79			      "jx	%0\n\t"
80			      :
81			      : "a" (XCHAL_RESET_VECTOR_VADDR)
82			      : "a2"
83			      );
84
85	/* control never gets here */
86}
87
88void __init platform_setup(char** cmdline)
89{
90	led_print (0, "LINUX   ");
91}
92
93/* early initialization */
94
95void __init platform_init(bp_tag_t *first)
96{
97}
98
99/* Heartbeat. Let the LED blink. */
100
101void platform_heartbeat(void)
102{
103	static int i=0, t = 0;
104
105	if (--t < 0)
106	{
107		t = 59;
108		led_print(7, i ? ".": " ");
109		i ^= 1;
110	}
111}
112
113//#define RS_TABLE_SIZE 2
114//#define STD_COM_FLAGS (ASYNC_BOOT_AUTOCONF|ASYNC_SKIP_TEST)
115
116#define _SERIAL_PORT(_base,_irq)					\
117{									\
118	.mapbase	= (_base),					\
119	.membase	= (void*)(_base),				\
120	.irq		= (_irq),					\
121	.uartclk	= DUART16552_XTAL_FREQ,				\
122	.iotype		= UPIO_MEM,					\
123	.flags		= UPF_BOOT_AUTOCONF,				\
124	.regshift	= 2,						\
125}
126
127static struct plat_serial8250_port xt2000_serial_data[] = {
128#if XCHAL_HAVE_BE
129	_SERIAL_PORT(DUART16552_1_ADDR + 3, DUART16552_1_INTNUM),
130	_SERIAL_PORT(DUART16552_2_ADDR + 3, DUART16552_2_INTNUM),
131#else
132	_SERIAL_PORT(DUART16552_1_ADDR, DUART16552_1_INTNUM),
133	_SERIAL_PORT(DUART16552_2_ADDR, DUART16552_2_INTNUM),
134#endif
135	{ }
136};
137
138static struct platform_device xt2000_serial8250_device = {
139	.name		= "serial8250",
140	.id		= PLAT8250_DEV_PLATFORM,
141	.dev		= {
142	    .platform_data = xt2000_serial_data,
143	},
144};
145
146static struct resource xt2000_sonic_res[] = {
147	{
148		.start = SONIC83934_ADDR,
149		.end   = SONIC83934_ADDR + 0xff,
150		.flags = IORESOURCE_MEM,
151	},
152	{
153		.start = SONIC83934_INTNUM,
154		.end = SONIC83934_INTNUM,
155		.flags = IORESOURCE_IRQ,
156	},
157};
158
159static struct platform_device xt2000_sonic_device = {
160	.name		= "xtsonic",
161	.num_resources	= ARRAY_SIZE(xt2000_sonic_res),
162	.resource		= xt2000_sonic_res,
163};
164
165static int __init xt2000_setup_devinit(void)
166{
167	platform_device_register(&xt2000_serial8250_device);
168	platform_device_register(&xt2000_sonic_device);
169
170	return 0;
171}
172
173device_initcall(xt2000_setup_devinit);
174