LXR linux/arch/m68k/coldfire/m5272.c

   1/***************************************************************************/
   2
   3/*
   4 *      m5272.c  -- platform support for ColdFire 5272 based boards
   5 *
   6 *      Copyright (C) 1999-2002, Greg Ungerer (gerg@snapgear.com)
   7 *      Copyright (C) 2001-2002, SnapGear Inc. (www.snapgear.com)
   8 */
   9
  10/***************************************************************************/
  11
  12#include <linux/kernel.h>
  13#include <linux/param.h>
  14#include <linux/init.h>
  15#include <linux/io.h>
  16#include <linux/phy.h>
  17#include <linux/phy_fixed.h>
  18#include <asm/machdep.h>
  19#include <asm/coldfire.h>
  20#include <asm/mcfsim.h>
  21#include <asm/mcfuart.h>
  22#include <asm/mcfclk.h>
  23
  24/***************************************************************************/
  25
  26/*
  27 *      Some platforms need software versions of the GPIO data registers.
  28 */
  29unsigned short ppdata;
  30unsigned char ledbank = 0xff;
  31
  32/***************************************************************************/
  33
  34DEFINE_CLK(pll, "pll.0", MCF_CLK);
  35DEFINE_CLK(sys, "sys.0", MCF_BUSCLK);
  36DEFINE_CLK(mcftmr0, "mcftmr.0", MCF_BUSCLK);
  37DEFINE_CLK(mcftmr1, "mcftmr.1", MCF_BUSCLK);
  38DEFINE_CLK(mcftmr2, "mcftmr.2", MCF_BUSCLK);
  39DEFINE_CLK(mcftmr3, "mcftmr.3", MCF_BUSCLK);
  40DEFINE_CLK(mcfuart0, "mcfuart.0", MCF_BUSCLK);
  41DEFINE_CLK(mcfuart1, "mcfuart.1", MCF_BUSCLK);
  42DEFINE_CLK(mcfqspi0, "mcfqspi.0", MCF_BUSCLK);
  43DEFINE_CLK(fec0, "fec.0", MCF_BUSCLK);
  44
  45struct clk *mcf_clks[] = {
  46        &clk_pll,
  47        &clk_sys,
  48        &clk_mcftmr0,
  49        &clk_mcftmr1,
  50        &clk_mcftmr2,
  51        &clk_mcftmr3,
  52        &clk_mcfuart0,
  53        &clk_mcfuart1,
  54        &clk_mcfqspi0,
  55        &clk_fec0,
  56        NULL
  57};
  58
  59/***************************************************************************/
  60
  61static void __init m5272_uarts_init(void)
  62{
  63        u32 v;
  64
  65        /* Enable the output lines for the serial ports */
  66        v = readl(MCFSIM_PBCNT);
  67        v = (v & ~0x000000ff) | 0x00000055;
  68        writel(v, MCFSIM_PBCNT);
  69
  70        v = readl(MCFSIM_PDCNT);
  71        v = (v & ~0x000003fc) | 0x000002a8;
  72        writel(v, MCFSIM_PDCNT);
  73}
  74
  75/***************************************************************************/
  76
  77static void m5272_cpu_reset(void)
  78{
  79        local_irq_disable();
  80        /* Set watchdog to reset, and enabled */
  81        __raw_writew(0, MCFSIM_WIRR);
  82        __raw_writew(1, MCFSIM_WRRR);
  83        __raw_writew(0, MCFSIM_WCR);
  84        for (;;)
  85                /* wait for watchdog to timeout */;
  86}
  87
  88/***************************************************************************/
  89
  90void __init config_BSP(char *commandp, int size)
  91{
  92#if defined (CONFIG_MOD5272)
  93        /* Set base of device vectors to be 64 */
  94        writeb(0x40, MCFSIM_PIVR);
  95#endif
  96
  97#if defined(CONFIG_NETtel) || defined(CONFIG_SCALES)
  98        /* Copy command line from FLASH to local buffer... */
  99        memcpy(commandp, (char *) 0xf0004000, size);
 100        commandp[size-1] = 0;
 101#elif defined(CONFIG_CANCam)
 102        /* Copy command line from FLASH to local buffer... */
 103        memcpy(commandp, (char *) 0xf0010000, size);
 104        commandp[size-1] = 0;
 105#endif
 106
 107        mach_reset = m5272_cpu_reset;
 108        mach_sched_init = hw_timer_init;
 109}
 110
 111/***************************************************************************/
 112
 113/*
 114 * Some 5272 based boards have the FEC ethernet diectly connected to
 115 * an ethernet switch. In this case we need to use the fixed phy type,
 116 * and we need to declare it early in boot.
 117 */
 118static struct fixed_phy_status nettel_fixed_phy_status __initdata = {
 119        .link   = 1,
 120        .speed  = 100,
 121        .duplex = 0,
 122};
 123
 124/***************************************************************************/
 125
 126static int __init init_BSP(void)
 127{
 128        m5272_uarts_init();
 129        fixed_phy_add(PHY_POLL, 0, &nettel_fixed_phy_status, -1);
 130        return 0;
 131}
 132
 133arch_initcall(init_BSP);
 134
 135/***************************************************************************/
 136