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

   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
  35static 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
  44void platform_halt(void)
  45{
  46        led_print (0, "  HALT  ");
  47        local_irq_disable();
  48        while (1);
  49}
  50
  51void platform_power_off(void)
  52{
  53        led_print (0, "POWEROFF");
  54        local_irq_disable();
  55        while (1);
  56}
  57
  58void 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
  66void __init platform_setup(char** cmdline)
  67{
  68        led_print (0, "LINUX   ");
  69}
  70
  71/* early initialization */
  72
  73void __init platform_init(bp_tag_t *first)
  74{
  75}
  76
  77/* Heartbeat. Let the LED blink. */
  78
  79void 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
 104static 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
 115static 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
 123static 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
 136static struct platform_device xt2000_sonic_device = {
 137        .name           = "xtsonic",
 138        .num_resources  = ARRAY_SIZE(xt2000_sonic_res),
 139        .resource               = xt2000_sonic_res,
 140};
 141
 142static 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
 150device_initcall(xt2000_setup_devinit);
 151