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, " __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
  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);