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
  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
  49 void platform_halt(void)
  50 {
  51         led_print (0, "  HALT  ");
  52         local_irq_disable();
  53         while (1);
  54 }
  55
  56 void platform_power_off(void)
  57 {
  58         led_print (0, "POWEROFF");
  59         local_irq_disable();
  60         while (1);
  61 }
  62
  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
  71 void __init platform_setup(char** cmdline)
  72 {
  73         led_print (0, "LINUX   ");
  74 }
  75
  76 /* early initialization */
  77
  78 void __init platform_init(bp_tag_t *first)
  79 {
  80 }
  81
  82 /* Heartbeat. Let the LED blink. */
  83
  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
 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);