LXR linux/arch/mips/gt64120/wrppmc/setup.c

   1/*
   2 * setup.c: Setup pointers to hardware dependent routines.
   3 *
   4 * This file is subject to the terms and conditions of the GNU General Public
   5 * License.  See the file "COPYING" in the main directory of this archive
   6 * for more details.
   7 *
   8 * Copyright (C) 1996, 1997, 2004 by Ralf Baechle (ralf@linux-mips.org)
   9 * Copyright (C) 2006, Wind River System Inc. Rongkai.zhan <rongkai.zhan@windriver.com>
  10 */
  11#include <linux/init.h>
  12#include <linux/string.h>
  13#include <linux/kernel.h>
  14#include <linux/pm.h>
  15
  16#include <asm/io.h>
  17#include <asm/bootinfo.h>
  18#include <asm/reboot.h>
  19#include <asm/time.h>
  20#include <asm/gt64120.h>
  21
  22unsigned long gt64120_base = KSEG1ADDR(0x14000000);
  23
  24#ifdef WRPPMC_EARLY_DEBUG
  25
  26static volatile unsigned char * wrppmc_led = \
  27        (volatile unsigned char *)KSEG1ADDR(WRPPMC_LED_BASE);
  28
  29/*
  30 * PPMC LED control register:
  31 * -) bit[0] controls DS1 LED (1 - OFF, 0 - ON)
  32 * -) bit[1] controls DS2 LED (1 - OFF, 0 - ON)
  33 * -) bit[2] controls DS4 LED (1 - OFF, 0 - ON)
  34 */
  35void wrppmc_led_on(int mask)
  36{
  37        unsigned char value = *wrppmc_led;
  38
  39        value &= (0xF8 | mask);
  40        *wrppmc_led = value;
  41}
  42
  43/* If mask = 0, turn off all LEDs */
  44void wrppmc_led_off(int mask)
  45{
  46        unsigned char value = *wrppmc_led;
  47
  48        value |= (0x7 & mask);
  49        *wrppmc_led = value;
  50}
  51
  52/*
  53 * We assume that bootloader has initialized UART16550 correctly
  54 */
  55void __init wrppmc_early_putc(char ch)
  56{
  57        static volatile unsigned char *wrppmc_uart = \
  58                (volatile unsigned char *)KSEG1ADDR(WRPPMC_UART16550_BASE);
  59        unsigned char value;
  60
  61        /* Wait until Transmit-Holding-Register is empty */
  62        while (1) {
  63                value = *(wrppmc_uart + 5);
  64                if (value & 0x20)
  65                        break;
  66        }
  67
  68        *wrppmc_uart = ch;
  69}
  70
  71void __init wrppmc_early_printk(const char *fmt, ...)
  72{
  73        static char pbuf[256] = {'\0', };
  74        char *ch = pbuf;
  75        va_list args;
  76        unsigned int i;
  77
  78        memset(pbuf, 0, 256);
  79        va_start(args, fmt);
  80        i = vsprintf(pbuf, fmt, args);
  81        va_end(args);
  82
  83        /* Print the string */
  84        while (*ch != '\0') {
  85                wrppmc_early_putc(*ch);
  86                /* if print '\n', also print '\r' */
  87                if (*ch++ == '\n')
  88                        wrppmc_early_putc('\r');
  89        }
  90}
  91#endif /* WRPPMC_EARLY_DEBUG */
  92
  93void __init prom_free_prom_memory(void)
  94{
  95}
  96
  97void __init plat_mem_setup(void)
  98{
  99        extern void wrppmc_machine_restart(char *command);
 100        extern void wrppmc_machine_halt(void);
 101
 102        _machine_restart = wrppmc_machine_restart;
 103        _machine_halt    = wrppmc_machine_halt;
 104        pm_power_off     = wrppmc_machine_halt;
 105
 106        /* This makes the operations of 'in/out[bwl]' to the
 107         * physical address ( < KSEG0) can work via KSEG1
 108         */
 109        set_io_port_base(KSEG1);
 110}
 111
 112const char *get_system_type(void)
 113{
 114        return "Wind River PPMC (GT64120)";
 115}
 116
 117/*
 118 * Initializes basic routines and structures pointers, memory size (as
 119 * given by the bios and saves the command line.
 120 */
 121void __init prom_init(void)
 122{
 123        add_memory_region(WRPPMC_SDRAM_SCS0_BASE, WRPPMC_SDRAM_SCS0_SIZE, BOOT_MEM_RAM);
 124        add_memory_region(WRPPMC_BOOTROM_BASE, WRPPMC_BOOTROM_SIZE, BOOT_MEM_ROM_DATA);
 125
 126        wrppmc_early_printk("prom_init: GT64120 SDRAM Bank 0: 0x%x - 0x%08lx\n",
 127                        WRPPMC_SDRAM_SCS0_BASE, (WRPPMC_SDRAM_SCS0_BASE + WRPPMC_SDRAM_SCS0_SIZE));
 128}
 129