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setup.c

/*
 * setup.c: Setup pointers to hardware dependent routines.
 *
 * This file is subject to the terms and conditions of the GNU General Public
 * License.  See the file "COPYING" in the main directory of this archive
 * for more details.
 *
 * Copyright (C) 1996, 1997, 2004 by Ralf Baechle (ralf@linux-mips.org)
 * Copyright (C) 2006, Wind River System Inc. Rongkai.zhan <rongkai.zhan@windriver.com>
 */
#include <linux/init.h>
#include <linux/string.h>
#include <linux/kernel.h>
#include <linux/pm.h>

#include <asm/io.h>
#include <asm/bootinfo.h>
#include <asm/reboot.h>
#include <asm/time.h>
#include <asm/gt64120.h>

unsigned long gt64120_base = KSEG1ADDR(0x14000000);

#ifdef WRPPMC_EARLY_DEBUG

static volatile unsigned char * wrppmc_led = \
      (volatile unsigned char *)KSEG1ADDR(WRPPMC_LED_BASE);

/*
 * PPMC LED control register:
 * -) bit[0] controls DS1 LED (1 - OFF, 0 - ON)
 * -) bit[1] controls DS2 LED (1 - OFF, 0 - ON)
 * -) bit[2] controls DS4 LED (1 - OFF, 0 - ON)
 */
void wrppmc_led_on(int mask)
{
      unsigned char value = *wrppmc_led;

      value &= (0xF8 | mask);
      *wrppmc_led = value;
}

/* If mask = 0, turn off all LEDs */
void wrppmc_led_off(int mask)
{
      unsigned char value = *wrppmc_led;

      value |= (0x7 & mask);
      *wrppmc_led = value;
}

/*
 * We assume that bootloader has initialized UART16550 correctly
 */
void __init wrppmc_early_putc(char ch)
{
      static volatile unsigned char *wrppmc_uart = \
            (volatile unsigned char *)KSEG1ADDR(WRPPMC_UART16550_BASE);
      unsigned char value;

      /* Wait until Transmit-Holding-Register is empty */
      while (1) {
            value = *(wrppmc_uart + 5);
            if (value & 0x20)
                  break;
      }

      *wrppmc_uart = ch;
}

void __init wrppmc_early_printk(const char *fmt, ...)
{
      static char pbuf[256] = {'\0', };
      char *ch = pbuf;
      va_list args;
      unsigned int i;

      memset(pbuf, 0, 256);
      va_start(args, fmt);
      i = vsprintf(pbuf, fmt, args);
      va_end(args);

      /* Print the string */
      while (*ch != '\0') {
            wrppmc_early_putc(*ch);
            /* if print '\n', also print '\r' */
            if (*ch++ == '\n')
                  wrppmc_early_putc('\r');
      }
}
#endif /* WRPPMC_EARLY_DEBUG */

void __init prom_free_prom_memory(void)
{
}

void __init plat_mem_setup(void)
{
      extern void wrppmc_machine_restart(char *command);
      extern void wrppmc_machine_halt(void);

      _machine_restart = wrppmc_machine_restart;
      _machine_halt      = wrppmc_machine_halt;
      pm_power_off       = wrppmc_machine_halt;

      /* This makes the operations of 'in/out[bwl]' to the
       * physical address ( < KSEG0) can work via KSEG1
       */
      set_io_port_base(KSEG1);
}

const char *get_system_type(void)
{
      return "Wind River PPMC (GT64120)";
}

/*
 * Initializes basic routines and structures pointers, memory size (as
 * given by the bios and saves the command line.
 */
void __init prom_init(void)
{
      add_memory_region(WRPPMC_SDRAM_SCS0_BASE, WRPPMC_SDRAM_SCS0_SIZE, BOOT_MEM_RAM);
      add_memory_region(WRPPMC_BOOTROM_BASE, WRPPMC_BOOTROM_SIZE, BOOT_MEM_ROM_DATA);

      wrppmc_early_printk("prom_init: GT64120 SDRAM Bank 0: 0x%x - 0x%08lx\n",
                  WRPPMC_SDRAM_SCS0_BASE, (WRPPMC_SDRAM_SCS0_BASE + WRPPMC_SDRAM_SCS0_SIZE));
}

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