/arch/xtensa/platforms/xt2000/setup.c

  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, " __stringify(ICOUNTLEVEL) "\n\t"
 70			      "movi	a2, 0\n\t"
 71			      "wsr	a2, " __stringify(ICOUNT) "\n\t"
 72			      "wsr	a2, " __stringify(IBREAKENABLE) "\n\t"
 73			      "wsr	a2, " __stringify(LCOUNT) "\n\t"
 74			      "movi	a2, 0x1f\n\t"
 75			      "wsr	a2, " __stringify(PS) "\n\t"
 76			      "isync\n\t"
 77			      "jx	%0\n\t"
 78			      :
 79			      : "a" (XCHAL_RESET_VECTOR_VADDR)
 80			      : "a2"
 81			      );
 82
 83	/* control never gets here */
 84}
 85
 86void __init platform_setup(char** cmdline)
 87{
 88	led_print (0, "LINUX   ");
 89}
 90
 91/* early initialization */
 92
 93extern sysmem_info_t __initdata sysmem;
 94
 95void platform_init(bp_tag_t* first)
 96{
 97	/* Set default memory block if not provided by the bootloader. */
 98
 99	if (sysmem.nr_banks == 0) {
100		sysmem.nr_banks = 1;
101		sysmem.bank[0].start = PLATFORM_DEFAULT_MEM_START;
102		sysmem.bank[0].end = PLATFORM_DEFAULT_MEM_START
103				     + PLATFORM_DEFAULT_MEM_SIZE;
104	}
105}
106
107/* Heartbeat. Let the LED blink. */
108
109void platform_heartbeat(void)
110{
111	static int i=0, t = 0;
112
113	if (--t < 0)
114	{
115		t = 59;
116		led_print(7, i ? ".": " ");
117		i ^= 1;
118	}
119}
120
121//#define RS_TABLE_SIZE 2
122//#define STD_COM_FLAGS (ASYNC_BOOT_AUTOCONF|ASYNC_SKIP_TEST)
123
124#define _SERIAL_PORT(_base,_irq)					\
125{									\
126	.mapbase	= (_base),					\
127	.membase	= (void*)(_base),				\
128	.irq		= (_irq),					\
129	.uartclk	= DUART16552_XTAL_FREQ,				\
130	.iotype		= UPIO_MEM,					\
131	.flags		= UPF_BOOT_AUTOCONF,				\
132	.regshift	= 2,						\
133}
134
135static struct plat_serial8250_port xt2000_serial_data[] = {
136#if XCHAL_HAVE_BE
137	_SERIAL_PORT(DUART16552_1_ADDR + 3, DUART16552_1_INTNUM),
138	_SERIAL_PORT(DUART16552_2_ADDR + 3, DUART16552_2_INTNUM),
139#else
140	_SERIAL_PORT(DUART16552_1_ADDR, DUART16552_1_INTNUM),
141	_SERIAL_PORT(DUART16552_2_ADDR, DUART16552_2_INTNUM),
142#endif
143	{ }
144};
145
146static struct platform_device xt2000_serial8250_device = {
147	.name		= "serial8250",
148	.id		= PLAT8250_DEV_PLATFORM,
149	.dev		= {
150	    .platform_data = xt2000_serial_data,
151	},
152};
153
154static struct resource xt2000_sonic_res[] = {
155	{
156		.start = SONIC83934_ADDR,
157		.end   = SONIC83934_ADDR + 0xff,
158		.flags = IORESOURCE_MEM,
159	},
160	{
161		.start = SONIC83934_INTNUM,
162		.end = SONIC83934_INTNUM,
163		.flags = IORESOURCE_IRQ,
164	},
165};
166
167static struct platform_device xt2000_sonic_device = {
168	.name		= "xtsonic",
169	.num_resources	= ARRAY_SIZE(xt2000_sonic_res),
170	.resource		= xt2000_sonic_res,
171};
172
173static int __init xt2000_setup_devinit(void)
174{
175	platform_device_register(&xt2000_serial8250_device);
176	platform_device_register(&xt2000_sonic_device);
177
178	return 0;
179}
180
181device_initcall(xt2000_setup_devinit);