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
  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                               "wsr      a2, ibreakenable\n\t"
  73                               "wsr      a2, lcount\n\t"
  74                               "movi     a2, 0x1f\n\t"
  75                               "wsr      a2, 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
  86 void __init platform_setup(char** cmdline)
  87 {
  88         led_print (0, "LINUX   ");
  89 }
  90
  91 /* early initialization */
  92
  93 extern sysmem_info_t __initdata sysmem;
  94
  95 void 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
 109 void 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
 135 static 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
 146 static 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
 154 static 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
 167 static struct platform_device xt2000_sonic_device = {
 168         .name           = "xtsonic",
 169         .num_resources  = ARRAY_SIZE(xt2000_sonic_res),
 170         .resource               = xt2000_sonic_res,
 171 };
 172
 173 static 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
 181 device_initcall(xt2000_setup_devinit);